Multiple myeloma. also known as plasma cell myeloma or Kahler's disease, is a types of abnormal growth of plasma cells collected in the none marrow where they grow and multiple to interfere with the production of normal blood cells. Paraprotein, an abnormal antibody produced by the plasma cell myeloma not only can cause kidney problem but also interference with the Roche automated total bilirubin assay caused by precipitate formation of that can cause clinical confusion, according to the study by the Harvard Medical School, Boston(1). Other study indicated that the production of paraproteins caused spurious results on individual analytes including total bilirubin (TBIL), direct bilirubin (DBIL), or HDL-cholesterol (HDL-C)(b). there is also a report of a 50 years old
chloride resistant metabolic alkalosis in a patient with hypercalcemia related to Multiple Myeloma (MM)(c).
I. Symptoms
1. Bone and back pain
Bone pain, especially back pain, is a common presenting feature of myeloma patients. According to the study by the University of Arkansas for Medical Sciences, there is a report of three multiple myeloma patients with exacerbations of back pain and referred shoulder pain resulting from vertebral infections(1).
2. Infections
Multiple myeloma (MM) is a malignancy of clonal plasma cells, resulting in an increased production of ineffective immunoglobulins with suppression of non-involved immunoglobulins. According to the study by The John Theurer Cancer Center at Hackensack University Medical Center, patients with MM are at increased risk of infectious complications, particularly streptococcal and staphylococcal infections(2).
3. Fatigue, pain, sleep and mood disturbances, and diminished functional performance.
Cancer-related fatigue and insomnia are common distressing symptoms and may affect mood and performance status. In the study to describe fatigue, sleep, pain, mood, and performance status and the relationships among these variables in 187 patients with newly diagnosed multiple myeloma (MM) and conduct an analysis using the correlates of fatigue, showed that patients with newly diagnosed MM presented with fatigue, pain, sleep and mood disturbances, and diminished functional performance. The regression model, which included all of these variables along with age, sex, and stage of disease, was statistically significant with a large measure of effect. Mood was a significant individual contributor to the model(3).
4. Vertebral fracture
Patients with painful vertebral compression fractures produced by multiple myeloma (MM) often experience reduction in pain after spinal augmentation with kyphoplasty or vertebroplasty, according to teh study by the The University of Texas MD Anderson Cancer Center(4)
5. Others symptoms
According to the study by the Sultan Qaboos University Hospital, Multiple myeloma is a rare, largely incurable malignant disease of plasma cells. Patients usually present with hypercalcemia, renal insufficiency, anemia and/or lytic bony lesions along with a monoclonal protein in the serum and/or urine in addition to an increase in the number of clonal plasma cells in the bone marrow(5). Other study indicated that patients with MM reported a mean decrease (e.g., worsening) between baseline and 1-yr follow-up scores for: quality of life (mean, 68 vs. 55, respectively, P < 0.001; 74% of patients had a deteriorated score), fatigue (33 vs. 39, P < 0.05; 50%), nausea and vomiting (6.3 vs. 13, P < 0.05; 71%), pain (33 vs. 43, P < 0.05; 59%), and dyspnea (17 vs. 33, P < 0.001; 66%). The most bothering symptoms during the past week were tingling hands/feet (32%), back pain (28%), bone aches/pain (26%), pain in arm/shoulder (19%), and feeling drowsy (18%)(6).
II. Causes and Risk factors
A. Causes
1. Monoclonal gammopathy of undetermined significance (MGUS)
Monoclonal gammopathy of undetermined significance (MGUS) has been associated with an increased risk of smoldering multiple myeloma (SMM. Strong evidence showed that multiple myeloma is consistently preceded by a precursor state at the molecular level, there is urgent need to better understand mechanisms that regulate transformation from precursor to full-blown multiple myeloma(7).
2. Genetic abnormalities
a. Dysregulation of c-myc Gene
Dysregulation of c-myc by translocation to the switch regions of the IgH locus occurs in most murine plasmacytomas. Translocations involving 14q32 have been reported in 20-40% of abnormal karyotypes from human multiple myeloma (MM), and involve a variety of loci(8).
b. Gene (IgH)
Chromosome translocations involving the immunoglobulin heavy chain gene (IgH) on 14q32 are a seminal event in the pathogenesis of many B-cell malignancies. According to the study by the New York Presbyterian Hospital-Weill Medical College of Cornell University, , Recurrent Ig translocations identify at least three distinct molecular subtypes of myeloma(9).
c. Chromosome translocations
(11q13 (cyclin D1), 6p21 (cyclin D3), 4p16 (FGFR3 and MMSET), and 16q23 (c-maf))
Four chromosomal partners appear to account for the majority of primary IgH translocations: 11q13 (cyclin D1), 6p21 (cyclin D3), 4p16 (FGFR3 and MMSET), and 16q23 (c-maf). They are mediated primarily by errors in IgH switch recombination and less often by errors in somatic hypermutation, with the former dissociating the intronic and 3' enhancer(s), so that potential oncogenes can be dysregulated on each derivative chromosome (e.g., FGFR3 on der14 and MMSET on der4). Secondary translocations, which sometimes do not involve Ig loci, are more complex, and are not mediated by errors in B cell specific DNA modification mechanisms(10).
d. Cytogenetic alteration and/or hyperdiploidy
At diagnosis, 96% of cases with multiple myeloma versus 77% of monoclonal gammopathy of undetermined significance cases showed at least one cytogenetic alteration and/or hyperdiploidy(11).
3. Etc.
B. Risk Factors
1. Age
The risk of Multiple myeloma increase with Age and multiple myeloma (MM) is the second most common hematological malignancy in China. According to the study by the Beijing Chaoyang Hospital, Capital Medical University, in the retrospectively analyzed study of 264 newly diagnosed MM patients from the Beijing Chaoyang Hospital showed that the median patient age was 59 years (range, 28-84) and the most common monoclonal protein (42%) was the IgG subtype(12).
2. Gender
In the study to to characterize gender disparities in myeloma, showed that
a. Genetic lesions (13q- trisomy 1q, and an IGH)
Disparities were found in the prevalence of primary genetic lesions with immunoglobulin heavy chain gene (IGH) translocations being more common in women (50% of female patients vs. 38% of male patients, P < 0.001).
b. Hyperdiploidy
Hyperdiploidy is being more common in men (50% female vs. 62% male, P < 0.001)(13).
3. Excess body weight
Excess body weight is a risk factor for multiple myeloma. According to the stdy by the National Institute of Environmental Medicine suggested that excess risk of multiple myeloma (MM) among obese persons could be the result of altered circulating levels of adipokines, polypeptide hormones with pro- and anti-inflammatory properties secreted by adipose tissue as adiponectin may play an important role in obesity-related myelomagenesis(14).
4. Body build or nutritional status
In an exploratory study conducted of common clinical conditions as predictors of subsequent cancer in 143,574 outpatients of a health maintenance organization (in California, USA), suggest that body build or nutritional status may be involved in the development of MM by mechanisms that are presently unknown(15).
5. Race
Epidemiological data have suggested that African Americans (AA) are twice as likely to be diagnosed with multiple myeloma (MM) as compared to European Americans (EA)(16).
III. Complications and diseases associated to Multiple myeloma
A. Complications
1. Deteriorated quality of life
patients with MM reported a mean decrease (e.g., worsening) between baseline and 1-yr follow-up scores for: quality of life (mean, 68 vs. 55, respectively, P < 0.001; 74% of patients had a deteriorated score)(17).
2. Immue dysfucntion
Mesenchymal stem cells (MSCs), a key regulator for immunomodulatory function, have decreased osteogenic potential in MM patients opf that can lead to impaied immunity. According to the study by the Second Affiliated Hospital of Soochow University, T cells from normal donors possessed the ability to promote osteoblastic differentiation of ND-MSCs, but this ability of T cells both directly from MM patients and co-cultured with MM-MSCs was impaired which in turn lose the ability to stimulate osteogenesis of MSCs(18).
3. Osteogenesis imperfecta
Osteogenesis imperfecta (OI) also known as brittle bone disease, is a congenital bone disorder that causes extremely fragile bones.There is a report of a case of osteogenesis imperfecta with multiple fractures already from childhood, myelomatosis was diagnosed at the age of 52 years as a result of a serum M-component (IgG, lambda), Bence Jones proteinuria, myeloma cells in the bone marrow, and osteolytic skeletal lesions of that can lead to erosion of bone mass and fractures. She died 10 months later. A partial postmortem examination of a larger bone lesion confirmed the diagnosis.(19).
4. Renal insufficiency
Renal insufficiency is an independent risk factor in MM. An impaired renal function in light chain associated disorders may be caused by myeloma cast nephropathy (MCN) but also by AL-amyloidosis (AL-A) and monoclonal immundeposition disease (MIDD), according to the study by Heinrich Braun Klinikum Zwickau(20).
5. Anemia
Anemia is a common complication in patients with multiple myeloma (MM) and occurs in more than two thirds of all patients as MM can inetrfere with the production of normal blood cells. According to the study by Department of Medicine I, Wilhelminenspital, the most frequent underlying pathophysiological mechanism is anemia of chronic disease (ACD), relative erythropoietin (EPO) deficiency (due partly to renal impairment) and myelosuppressive effects of chemotherapy, but many other factors may account for or contribute to anemia in myeloma(21).
6. Pseudomonas endocartiditis
There is a report of a case of a is reported a rare case in a 73-year-old man with multiple myeloma who developed endocarditis due to pseudomonas(21a).
Etc.
B. Diseases associated to Multiple myeloma
1. Bone diseases
Multiple myeloma is a plasma cell malignancy characterized by the frequent development of osteolytic bone lesions. According to the study by the University of Pittsburgh, and Division of Hematology/Oncology, Veterans Administration Pittsburgh Healthcare System, Research and Development, the multiple myeloma-induced bone destruction is a result of the increased activity of osteoclasts that occurs adjacent to multiple myeloma cells. This activity is accompanied by suppressed osteoblast differentiation and activity, resulting in severely impaired bone formation and development of devastating osteolytic lesions(22).
2. Bilateral ovarian involvement
Extramedullary spread of multiple myeloma is extremely rare. There is a report of a case of bilateral ovarian involvement in plasma cell myeloma of a 48-year-old Persian woman who experienced constitutional symptoms, bone pain and flashing for one year. Her condition showed multiple myeloma with lytic lesions of the skull, plasma cell infiltration in bone marrow and positive light chain lambda type in serum(23).
3. Gaucher's disease
There is a report of a case of the evolution of a monoclonal gammopathy of undetermined significance to multiple myeloma in a patient with Gaucher's disease of a 64-year-old woman who, 12 years after receiving a diagnosis of Gaucher's disease with concurrent monoclonal gammopathy of undetermined significance, developed worsening thrombocytopenia and bone pain(24).
4. Acetabular osteolysis
There is a report of a case of 71 year old man was operated in December 2005 with a total uncemented hip arthroplasty. Immediate evolution was favourable but at 4 months postoperatively he came with the complaints of left back pain irradiating in the left thigh. X-rays revealed the presence of a lytic lesion around the acetabulum with secondary dispalcement of the acetabular cup. Further investigations ruled out infection and confirmed the presence of multiple myelom(25).
5. Paget Disease (PD)
Although the Coexistence of Paget Disease (PD) and symptomatic Multiple Myeloma (MM) has rarely been described, there is a report of a 73 years old man with a diagnosis of Paget Disease (PD) and symptomatic Multiple Myeloma (MM). PD mimics many of the features of bone destructive process in MM, making differential diagnosis more complicated. In addition, the presence of serious muscolo-skeletal and metabolic complications in both diseases makes management of patients difficult, worsening the prognosis(26).
6. Multiple myeloma associated precursor diseases
Multiple myeloma and chronic lymphocytic leukaemia share common biological and clinical features including the presence of defined precursor conditions (monoclonal gammopathy of undetermined significance and monoclonal B-cell lymphocytosis respectively), according to the study by the National Institutes of Health, Bethesda(27).
IV. Misdiagnosis and Diagnosis
A. Misdiagnosis
1. Spinal epidural metastasis
There is a report of a 42-year-old man presented with a one-month history of upper back pain and a two-week history of progressive spastic paraparesis. Thoracic spinal MRI showed an epidural mass with spinal cord compression at T6-8 but no bony involvement. The patient underwent T6-8 laminectomy for decompression. Lumbosacral MRI and CT scans revealed bony abnormalities on the sacrum and left posterior iliac bone. Immunohistochemical studies confirmed the diagnosis of multiple myeloma (MM)(28).
2. Orbital mass
There is a report of a case of a 28-year-old African-American woman presented with new onset of left exophthalmos and diplopia with initially vomputed tomography of the head showed a solitary mass in the left orbit, But excisional biopsy revealed a diffuse infiltrate composed of exclusively λ-restricted monotypic plasma cells based on morphology and immunohistochemistry, consistent with a plasma cell neoplasia. A subsequent staging bone marrow biopsy showed involvement of the bone marrow by λ-restricted monotypic plasma cells, consistent with a plasma cell myeloma. Serum protein electrophoresis and immunofixation studies on the peripheral blood showed a monoclonal band of IgE-λ; thus, an IgE-λ plasma cell myeloma(29).
3. Acute liver diseases
According to the study by St. Vincent's Comprehensive Cancer Center, there is a report of a case of a 55-year-old woman with MM who presented with painless jaundice, mild pruritus, and abnormal liver function tests resembling acute cholestatic hepatitis without the stigmata of chronic liver disease, but clinical manifestations of liver involvement in multiple myeloma (MM) are uncommon. Rare cases of MM present as acute liver disease(30).
4. Pituitary mass lesion
there is a report of a case of a 71-year-old female patient affected by an extramedullary IgG-lambda multiple myeloma presenting as a pituitary mass lesion. The diagnostic approaches confirmed the diagnosis of multiple myeloma and describe treatment outcome after therapy, according to the study by Medizinische Klinik Campus Innenstadt, Klinikum der LMU(31).
5. Intrasellar plasmacytoma
Plasmacytomas are unusual causes of a sellar mass. Occasionally, they can be misdiagnosed as a nonfunctioning adenoma because of radiological and clinical similarities. there is a report of a 70-year-old woman presented with a recurrent hypophysial mass. Initial diagnosis of a nonfunctioning pituitary adenoma was later overruled by a repeat biopsy, which showed a plasmacytoma. The tumor stained positively for CD138 and kappa light chain(32).
6. Pituitary adenoma
There is a report of a case of multiple myeloma which presented as a solitary intrasellar tumor. The initial radiographic and light microscopic findings were interpreted as being consistent with pituitary adenoma. Subsequently, when systemic disease developed and a bone marrow biopsy demonstrated multiple myeloma(33),
7. Chromophobe adenoma
62-year-old woman presenting with intracranial lesion eroding the sella with compression of optic chiasma was found to have plasmacytoma of the pituitary area. At the time of initial surgery, the patient had no biochemical, immunologic or marrow findings of multiple myeloma. The intracranial tumor was interpreted initially as chromophobe adenoma on light microscopy, but the diagnosis of plasmacytoma was established by electron microscopic examination of the tumor(34).
8. Etc.
B. Diagnosis
If you are experience some of the above symptoms, after recording the complete family history and physical examination, the test which your doctor orders may include
1. Standard Blood and urine tests
The aim of the tests are to detect the presence of M proteins of which may be an indication of Multiple myeloma. If M protein is found in the test, additional boold test for beta-2-microglobulin may be necessary for the comfirmation of outcome.
2. Serum Free Light Chain Assays
Free light chain (FLC) assays are important in the diagnosis and monitoring of patients with multiple myeloma (MM). Elevated immunoglobulin free light chain (FLC) level and abnormal FLC ratio are commonly seen in multiple myeloma (MM) and have prognostic implications, accosing to the study by the Division of Hematology, Mayo Clinic, a combination of the risk factors; either abnormal FLC estimate and/or the presence of high-risk IgH translocation, achieved better prognostic stratification. We conclude that patients with IgH translocations have higher FLC levels and abnormal ratios, but the prognostic effect of FLC is only partially explained by translocation status. A system including both these risk factors allows better prediction of outcome(35).
3. Imaging
In multiple myeloma, imaging is required to determine the stage of disease and to anticipate impending bone fractures. According to the study by the Department of Radiology, German Cancer Research Center, modern systems include
a. MRI findings. MRI is most sensitive to both diffuse bone marrow involvement as well as solid plasma cell tumors.
b. Whole-body low-dose CT (WBCT) may replace plain films in the near future, since it is quicker, more sensitive, and is better tolerated by patients. Intramedullary lesions are well seen as long as they are located in long bones where they are surrounded by fat. Diffuse bone marrow infiltration as well as intravertebral lesions, however, are difficult to detect with WBCT in the absence of frank destruction of cancellous bone.
c. PET or PET-CT with 18-fluoro-deoxyglucose (FDG) are insensitive to diffuse bone marrow infiltration, but may help to assess treatment response in solitary or multiple solid plasma cell tumors which have a high FDG uptake before treatment(36).
4. Bone marrow examination
There have been suggestions to eliminate the need for BM examinations as a result of a bone marrow (BM) examination showing less than 5% plasma cells in addition to negative serum and urine immunofixation. In the study to evaluate of patients with multiple myeloma who achieved negative immunofixation in the serum and urine after therapy and found that 14% had BM plasma cells more than or equal to 5%. Adding a requirement for normalization of the serum-free light chain ratio to negative immunofixation studies did not negate the need for BM studies; 10% with a normal serum-free light chain ratio had BM plasma cells more than or equal to 5%. We also found that, on achieving immunofixation-negative status, patients with less than 5% plasma cells in the BM had improved overall survival compared with those with 5% or more BM plasma cells (6.2 years vs 2.3 years, respectively; P = .01)(37).
V. Preventions
A. Diet to prevent Multiple myeloma
1. Turmeric
In the study of Curcumin (diferuloylmethane) down-regulates the constitutive activation of nuclear factor-kappa B and IkappaBalpha kinase in human multiple myeloma cells, leading to suppression of proliferation and induction of apoptosis, scientists at the The University of Texas MD Anderson Cancer Center, showed that Curcumin suppressed the constitutive IkappaBalpha phosphorylation through the inhibition of IKK activity. Curcumin also down-regulated the expression of NF-kappaB-regulated gene products, including IkappaBalpha, Bcl-2, Bcl-x(L), cyclin D1, and interleukin-6. This led to the suppression of proliferation and arrest of cells at the G(1)/S phase of the cell cycle. Suppression of NF-kappaB complex by IKKgamma/NF-kappaB essential modulator-binding domain peptide also suppressed the proliferation of MM cells. Curcumin also activated caspase-7 and caspase-9 and induced polyadenosine-5'-diphosphate-ribose polymerase (PARP) cleavage. Curcumin-induced down-regulation of NF-kappaB, a factor that has been implicated in chemoresistance, also induced chemosensitivity to vincristine and melphalan(38)
2. Green tea
(-)-epigallocatechin-3-gallate extracted from green tea have exerted the inhibitory effect against multiple myeloma cells. Dr. Shammas MA and the research team at Veterans Administration Boston Health Care System, and Dana Farber Cancer Institute/Harvard Medical School, showed that EGCG interacts with the 67-kDa laminin receptor 1 (LR1), which is significantly elevated in myeloma cell lines and patient samples relative to normal PBMCs. RNAi-mediated inhibition of LR1 resulted in abrogation of EGCG-induced apoptosis in myeloma cells, indicating that LR1 plays an important role in mediating EGCG activity in MM while sparing PBMCs. Evaluation of changes in gene expression profile indicates that EGCG treatment activates distinct pathways of growth arrest and apoptosis in MM cells by inducing the expression of death-associated protein kinase 2, the initiators and mediators of death receptor-dependent apoptosis (Fas ligand, Fas, and caspase 4), p53-like proteins (p73, p63), positive regulators of apoptosis and NF-kappaB activation (CARD10, CARD14), and cyclin-dependent kinase inhibitors (p16 and p18)(39)
3. Skins and seed of grape and wine
In the study to investigate the effect of Resveratrol trans-3, 4', 5,-trihydroxystilbene, insuppressing the multiple myeloma (MM), found that Resveratrol activated IRE1α as evidenced by XBP1 messenger RNA splicing and phosphorylation of both IRE1α and its downstream kinase c-Jun N-terminal kinase in MM cells. These responses were associated with resveratrol-induced cytotoxicity of MM cells. Resveratrol selectively suppressed the transcriptional activity of XBP1s while it stimulated gene expression of the molecules that are regulated by the non-IRE1/XBP1 axis of the ER stress response. Luciferase assays indicated that resveratrol suppressed the transcriptional activity of XBP1s through sirtuin 1, a downstream molecular target of resveratrol. Chromatin immunoprecipitation studies revealed that resveratrol decreased the DNA binding capacity of XBP1 and increased the enrichment of sirtuin 1 at the XBP1 binding region in the XBP1 promoter(40)
4. Carrot
Retinoic acid found of a measure amount in carrot has a potential in prevent and treat Myeloma (Multiple Myenoma). Study showed that The inhibitory effect of cRA was significantly superior to tRA (P = 0.0129) and IFN-alpha, similar to IFN-gamma and DEX. The combinations of cRA + IFN alpha, tRA + IFN-gamma, tRA + DEX did not show any synergistic effect on myeloma proliferation. In contrast, the combination cRA + DEX (0.29 +/- 0.04, M +/- SEM) markedly increased the effect of both cRA and DEX used as single agents. Ig synthesis was not significantly affected by CRA, tRA, IFN-gamma and the combination tRA + IFN-gamma. As expected, only IFN-alpha (P = 0.002) and DEX (P < 0.001) inhibited Ig production(41).
5. Black tea
In the study to assess the effect of its polyphenols, theaflavins found in black tea on the tumor's cellular proteasome function, an important biological target in cancer prevention, found that black tea extract (T5550) enriched in theaflavins inhibited the chymotrypsin-like (CT) activity of the proteasome and proliferation of human multiple myeloma cells in a dose-dependent manner(41a)
B. Phytochemicals to prevent Multiple myeloma
1. Curcumin
Curcumin (diferuloylmethane), a yellow pigment in turmeric, has been shown to inhibit the activation of nuclear factor-kappaB (NF-kappaB), a transcription factor closely linked to chemoresistance in multiple myeloma cells. According to the study by The University of Texas M. D. Anderson Cancer Center,, curcumin inhibited the proliferation of human multiple myeloma cells regardless of their sensitivity to dexamethasone, doxorubicin, or melphalan. Curcumin also potentiated the apoptotic effects of thalidomide and bortezomib by down-regulating the constitutive activation of NF-kappaB and Akt, and this correlated with the suppression of NF-kappaB-regulated gene products, including cyclin D1, Bcl-xL, Bcl-2, TRAF1, cIAP-1, XIAP, survivin, and vascular endothelial growth factor(42).
2. Epigallocatechin-3-gallate (EGCG)
Epigallocatechin-3-gallate (EGCG), a polyphenol extracted from green tea, is an antioxidant with chemopreventive and chemotherapeutic actions. Based on its ability to modulate growth factor-mediated cell proliferation.(43).
3. Resveratrol
Resveratrol exerts its chemotherapeutic effect on human MM cells through mechanisms involving the impairment of the pro-survival XBP1 signaling and the activation of pro-apoptotic ER stress response(44).
4. Retinoic acid
All-trans retinoic acid (ATRA) is a derivative of vitamin A. ATRA inhibits the growth of human myeloma cell lines and freshly isolated myeloma cells in vitro mainly by down-regulating interleukin-6 receptor. In the study of patients with stable multiple myeloma after conventional chemotherapy received ATRA alone for 2 months, followed by a combination of ATRA and the chemotherapy regimen, showed that the bone marrow cells of responding patients were sensitive to ATRA in vitro. These results show that ATRA alone is not effective to treat multiple myeloma. There may be some beneficial effect of ATRA in combination chemotherapy in selected patients who have activated IL-6 signalingm, according to Turku University Central Hospital(45).
C. Antioxidants to prevent Multiple myeloma
According to the study by University of Iowa, Iowa Cityprovides, there is stronge evidence that increases in MnSOD expression mediate IL-6-induced resistance to Dex and radiation in myeloma cells. The results indicate that inhibition of antioxidant pathways could enhance myeloma cell responses to radiotherapy and/or chemotherapy(46).
According to the study by the Chinese Academy of Medical Sciences and Peking Union Medical College, 4 antioxidant constituents from black tea, namely theaflavin (TF1), theaflavin-3-gallate (TF2A), theaflavin-3'-gallate (TF2B) and theaflavin digallate (TF3) have stronger antioxidant activity than that of BHT (Butylated hydorxytoluene)(47).
1. Theaflavin (TF1)
Black tea extract (T5550) enriched in theaflavins inhibited the chymotrypsin-like (CT) activity of the proteasome and proliferation of human multiple myeloma cells in a dose-dependent manner, according to Chinese Academy of Medical Sciences and Peking Union Medical College(48).
2. Vitamin A
Retinoids are vitamin A derivatives that critically regulate several physiological and pathological processes, including immune functions and cancer development. According to the study by the Seràgnoli University of Bologna, in vitro treatment with retinoids decreases bcl-2 protein expression and enhances dexamethasone-induced cytotoxicity and apoptosis in multiple myeloma cells(49).
3. Quercetin and myricetin
Dietary flavonoids, quercetin and myricetin, which are abundant in plasma, inhibited bortezomib-induced apoptosis of primary CLL and malignant B-cell lines in a dose-dependent manner. This inhibitory effect was associated with chemical reactions between quercetin and the boronic acid group, -RB(OH)2, in bortezomib. The addition of boric acid diminished the inhibitory effect of both quercetin and plasma on bortezomib-induced apoptosis. The protective effect was also reduced when myeloma cell lines, but not B-cell lines, were preincubated with quercetin, indicating a direct effect of quercetin on myeloma cells. At high doses, quercetin itself induced tumor cell death(50).
4. Betulinic acid
According to the study by The University of Texas M. D. Anderson Cancer Center, in the study to investigate Whether betulinic acid, a pentacyclic triterpene, can modulate the STAT3 pathway, was investigated in human multiple myeloma (MM) cells, indicated that betulinic acid inhibited constitutive activation of STAT3, Src kinase, JAK1 and JAK2. Pervanadate reversed the betulinic acid-induced downregulation of STAT3 activation, suggesting the involvement of a protein tyrosine phosphatase (PTP). Furthermore, betulinic acid induced the expression of the PTP SHP-1 and silencing of the SHP-1 gene abolished the ability of betulinic acid to inhibit STAT3 activation and rescued betulinic acid-induced cell death. Betulinic acid also downregulated the expression of STAT3-regulated gene products such as bcl-xL, bcl-2, cyclin D1 and survivin(50a)
VI. Treatments
A. In conventional medicine perspective
There is no cure for multiple myeloma. The aim of the treatment is to relieve the symptoms and bring back the normal quality of life in the patients.
A.1. Standard treatment
Thalidomide (T) and lenalidomide (R) had been used as first line therapy for previously untreated myeloma. In the study to to assess the treatment effects of lenalidomide-versus thalidomide-based regimen via common comparators, found that lenalidomide seemed to be a more potent and less toxic agent than thalidomide in the treatment of patients with multiple myeloma. Further the direct head-to-head trial comparing lenalidomide versus thalidomide is clearly warranted(51a). Other study indicated that LBCT is more efficient in the treatment of MM and has significant role in serum protein alterations especially in the reduction of M-protein in the MM patients(51b).
1. Immunomodulatory drugs (thalidomide, lenalidomide) and proteasome inhibitors (bortezomib, carfilzomib) and chemotherapy
Immunomodulatory drugs (thalidomide, lenalidomide) and proteasome inhibitors (bortezomib, carfilzomib) can induce apoptosis of myeloma plasma cells and suppress cytokine release and metabolic ways which sustain the disease. These novel agents demonstrate substantial activity either alone or as part of a range of combination regimens. MM therapy is now based on 1 or 2 new drugs plus standard chemotherapy, according to Azienda Ospedaliera Careggi(51). Other study indicated that although high-dose therapy with stem cell transplantation (SCT) and novel targeted therapies (thalidomide, its more potent analogues, and bortezomib) represent two approaches for overcoming resistance of multiple myeloma (MM) cells to conventional therapies, Gene expression profiling (GEP) will help to improve the management of MM not only by identifying prognostic subgroups but also by defining molecular pathways that are associated with these subgroups and that are possible targets for future therapies(52).
2. Corticosteroids
Corticosteroids may be used in patients of multiple myeloma with Disorder of glucose metabolism regulation. According to the study by Interní hematoonkologická klinika Lékarské fakulty MU a FN Brno, The deterioration of glucose tolerance leads to worsening of morbidity and mortality of seriously ill patients. In glucocorticoid-induced diabetes mellitus the highest levels of glucose are seen in the afternoon, in the evening and postprandially: Normal levels of glucose are seen in the morning. Excluding 11 patients with diabetes (16%), we idenfied 7 (10%) patients with normal glucose tolerance, 13 (19%) patients with impaired fasting glucose or/and impaired glucose tolerance and glucocorticoid-induced diabetes mellitus we found in 37 (55%) patients treated in our department with diagnosis of myeloma multiplex in the year 2004 intermitently with 40 mg dexamethason(53).
3. Radiation therapy for local symptoms
In the review of the experience at the University of Arizona in an effort to define the minimum effective radiation dose for durable pain relief in the majority of patients with symptomatic multiple myeloma of of 101 patients with multiple myeloma irradiated for palliation at the University of Arizona between 1975 and 1990, found that rtherapy is effective in palliating local symptoms in multiple myeloma. A total dose of 10 Gy should provide durable symptom relief in the majority of patients(54).
4. Stem cell transplantation
A high dose of melphalan followed by autologous stem cell transplantation (ASCT) is considered as the standard therapy for multiple myeloma(55).
5. Treatments and Supportive care
Treatment of younger fit patients with Multiple myeloma is with induction therapy consisting of steroids with one or more novel anti-myeloma agents followed by high dose melphalan and autologous stem cell transplantation, while older and less fit patients are treated with melphalan-based combination chemotherapy. Supportive care is of paramount importance and includes the use of bisphosphonates, prophylactic antibiotics, thrombosis prophylaxis and the use of hematopoietic growth factors along with the treatment of complications of disease and its therapy(56).
A.2. Initial therapy for myeloma
Hematopoietic stem cell transplantation (HSCT) is the transplantation of multipotent hematopoietic stem cells, usually derived from bone marrow, peripheral blood, or umbilical cord blood. The choice of initial therapy is affected by two main factors: risk-stratification and eligibility for autologous hematopoietic cell transplantation (HCT) and it has the potential for cure, but as a cost of increased treatment-related mortality.
The introduction of plerixafor as a peripheral blood stem cell mobilization agent has allowed more patients with multiple myeloma, non-Hodgkin's lymphoma, and Hodgkin's disease to mobilize sufficient hematopoietic progenitor cells (HPCs) to proceed to autologous transplantation, according to the study by the Columbia University, University of Pennsylvania,(57).
Hematopoietic stem cell transplantation (HSCT) is an effective therapy for hematological diseases such as lymphoma and multiple myeloma. According to the Unidad de Hematología Intensiva, Hospital del Salvador, 6 patients with Hodgkin lymphoma, three with multiple myeloma and one with a diffuse large B cell lymphoma were transplanted. Age range was 19 to 48 years and five patients were male. An average of 2.2 aphereses per patient was required. The CD 34 stem cell collection was 5.06 x 10(6) x Kg. The conditioning regimes were BEAM (carmus-tine, etoposide, cytosine arabinoside, melphalan) and melphalan 200 according to the underlying disease. Seventy percent of the patients developed mild to moderate mucositis and 50% had febrile neutropenia, with good response to treatment. In two cases there was an association with influenza. The engraftment of neutrophils and platelets was achieved on day +10 and +11 respectively. At follow-up until day +100, there was no morbidity or mortality(58).
A.3. Treatments for relapsed or treatment-resistant multiple myeloma
According to the study to estimate the efficacy of thalidomide monotherapy in the treatment of refractory and relapsed cases of multiple myelomaby Katedry i Kliniki Hematologii i Transplantacji Szpiku Kostnego Slaskiej Akademii Medycznej w Katowicach, found that the good tolerance of the drug, especially in lower doses, and lack of myelosuppression effect allows to expect, that the combination of thalidomide with other cytostatic drugs will improve the efficacy in patients with refractory or relapsed myeloma(59).
Other study in an assessment to compare the costs of two recent treatments (bortezomib (BORT) and lenalidomide plus dexamethasone (LEN/DEX)) for relapsed/refractory multiple myeloma (rrMM), from the perspective of a United States (US) payer, found that drug costs for the treatments were very similar, differing by under $10 per day. Medical and AE management costs for BORT were higher by more than $40 per day. Treatment with BORT had annual excess total costs of >$17,000 compared with LEN/DEX. A cost advantage for LEN/DEX was maintained across a variety of sensitivity analyses. Total cost per month without progression was 11% lower with LEN/DEX. rrMM treatment with BORT and LEN/DEX had comparable drug costs, total treatment costs for BORT were higher due to ongoing direct medical and AE management costs. Total costs per outcome (a month without disease progression) were lower for LEN/DEX, according to the study by Cedars-Sinai Samuel Oschin Cancer Center(60).
A.4. Treatments of symptoms
1. Painful vertebral compression
Patients with painful vertebral compression fractures produced by multiple myeloma (MM) often experience reduction in pain after spinal augmentation with kyphoplasty or vertebroplasty. According to the study by The University of Texas MD Anderson Cancer Center, pain reduction after spinal augmentation with vertebroplasty or kyphoplasty was positively associated with reduction in other patient-reported cancer-related symptoms. Future studies of these augmentation procedures should measure multiple symptoms, in addition to pain and functional status(61). Patients of Multiple myeloma with common symptoms of back back may be prescribed by apin reliever or a back brace.
2. Infection
Multiple myeloma (MM) is a malignancy of clonal plasma cells, resulting in an increased production of ineffective immunoglobulins with suppression of non-involved immunoglobulins. According to the study by The Abbott Northwestern Hospital, Minneapolis, administering TMP-SMX for the first 2 months of initial chemotherapy is effective, inexpensive prophylaxis for early bacterial infection in multiple myeloma(62).
For parients of Mutliple myeloma with complication of infection, antibiotics may be necessary
3. Renal impairment
Renal impairment is a common complication of multiple myeloma (MM) and is supported in virtually all patients by a tubulointerstitial pathology that results from high serum concentrations of monoclonal free light chains (FLCs). According to the study by the UCL Centre for Nephrology, Royal Free Hospital, The mainstay of therapy is presently the removal of aggravating factors (dehydration, hypercalcaemia, nephrotoxic drugs) and the prompt institution of rapidly acting novel chemotherapy combinations. This approach allows the rescue of kidney function in more than two-thirds of patients. High cut-off haemodialysis dialysers may potentially add clinical benefits and the outcomes of controlled trials are eagerly awaited(63).
But other study indicated that if a patient with cast nephropathy and severe acute kidney injury remains dialysis-dependent, the prognosis is poor. A prompt diagnosis and commencement of effective chemotherapy is a critical determinant of renal recovery. A randomized controlled trial of high cut-off haemodialysis in patients with cast nephropathy, who all receive bortezomib-based chemotherapy, is underway(64).
4. Bone diseases
Bone disease associated with multiple myeloma(MM)is characterized by increased osteoclast activity and suppressed osteoclast function because of some factors produced by myeloma cells, leading to severe osteolytic lesions. According to the study by Tochigi Cancer Center, Tochigi, Japan, good control of MM itself is very important in order to manage bone lesions caused by MM. Bisphosphonate(BP), a potent inhibitor of osteoclast activity and function, should be used as adjunctive therapy for MM bone disease. Recently, the MRC Myeloma IX trial demonstrated improved survival and delayed disease progression with the use of an intravenous BP, zoledronate, in patients with newly diagnosed MM. Its results may lead to an alteration of guidelines for BP treatments of MM(65).
Other study also indicated that of treatment of bone diseases of which intravenous pamidronate and zoledronic acid are equally effective in reducing SREs, whereas zoledronic acid seems to offer survival benefits in symptomatic patients. Caution is needed to avoid adverse events, such as renal impairment and osteonecrosis of the jaw. Novel antiresorptive agents, such as denosumab, have given encouraging results, but further studies are needed before their approval for managing myeloma bone disease. Combination approaches with novel antimyeloma agents, such as bortezomib (which has anabolic effects on bone) with bisphosphonates or with drugs that enhance osteoblast function, such as antidickkopf-1 agents, antisclerostin drugs, or sotatercept, may favorably alter our way of managing myeloma bone disease in the near future(66).
5. Anemia
Hepcidin is the principal iron-regulatory hormone and a pathogenic factor in anemia of inflammation. Patients with multiple myeloma (MM) frequently present with anemia. According to the Department of Hematology and Immunology, Vrije Universiteit Brussel, Brussels, treatment options for anemic myeloma patients include red blood cell (RBC) transfusions and recombinant human erythropoietin (rHuEPO).
5.1. Red blood cell transfusions convey an immediate effect and rapidly increase the patient's hemoglobin level. Unfortunately, effects of RBC transfusions are only transient and can be associated with several risks, including infections and mild to even life-threatening immunologic reactions.
5.2. rHuEPO is biologically equivalent to the human endogenous hormone EPO, and its application leads to an increase of hemoglobin levels over an extended time without the risks of blood transfusions. Several studies reported a significant improvement of erythropoiesis, reduction in transfusion need, and improved quality of life by using rHuEPO as long-term treatment of myeloma-associated anemia. Recently, an international expert panel recommended the use of rHuEPO for anemic myeloma patients where other possible causes of anemia have been eliminated(67).
B. In Herbal medicine perspective
1. Grape seed and skin
In the study to investigate whether resveratrol, a component of red grapes, berries, and peanuts, could suppress the proliferation of multiple myeloma (MM) cells by interfering with NF-kappaB and STAT3 pathways, showed that resveratrol inhibited the proliferation of human multiple myeloma cell lines regardless of whether they were sensitive or resistant to the conventional chemotherapy agents. This stilbene also potentiated the apoptotic effects of bortezomib and thalidomide. Resveratrol induced apoptosis as indicated by accumulation of sub-G(1) population, increase in Bax release, and activation of caspase-3. This correlated with down-regulation of various proliferative and antiapoptotic gene products, including cyclin D1, cIAP-2, XIAP, survivin, Bcl-2, Bcl-xL, Bfl-1/A1, and TRAF2. In addition, resveratrol down-regulated the constitutive activation of AKT(68).
2. Cayenne
Capsaicin is a constituent of green and red peppers inhibited constitutive activation of STAT3 in multiple myeloma cells in a dose- and time-dependent manner, with minimum effect on STAT5. Capsaicin also inhibited the interleukin-6-induced STAT3 activation. The activation of Janus-activated kinase 1 and c-Src, implicated in STAT3 activation, was also inhibited by the vanilloid, with no effect on extracellular signal-regulated kinase 1/2 activation. Pervanadate reversed the capsaicin-induced down-regulation of STAT3, suggesting the involvement of a protein tyrosine phosphatase. Capsaicin down-regulated the expression of the STAT3-regulated gene products, such as cyclin D1, Bcl-2, Bcl-xL, survivin, and vascular endothelial growth factor. Finally, capsaicin induced the accumulation of cells in G(1) phase, inhibited proliferation, and induced apoptosis, as indicated by caspase activation. Capsaicin also significantly potentiated the apoptotic effects of Velcade and thalidomide in multiple myeloma cells. When administered i.p., capsaicin inhibited the growth of human multiple myeloma xenograft tumors in male athymic nu/nu mice, according to the study by The University of Texas M. D. Anderson Cancer Center(69).
3. Tripterygium Wilfordi (Thunder of God vine) and Celastrus Regelii
Celastrola, is a remedial ingredient isolated from the root extracts of Tripterygium Wilfordi (Thunder of God vine) and Celastrus Regelii. According to the study by the National University of Singapore, celastrol inhibited the proliferation of MM cell lines regardless of whether they were sensitive or resistant to bortezomib and other conventional chemotherapeutic drugs. It also synergistically enhanced the apoptotic effects of thalidomide and bortezomib. This correlated with the down-regulation of various proliferative and anti-apoptotic gene products including cyclin D1, Bcl-2, Bcl-xL, survivin, XIAP and Mcl-1. These effects of celastrol were mediated through suppression of constitutively active NF-κB induced by inhibition of IκBα kinase activation; and the phosphorylation of IκBα and of p65. Celastrol also inhibited both the constitutive and IL6-induced activation of STAT3, which induced apoptosis as indicated by an increase in the accumulation of cells in the sub-G1 phase, an increase in the expression of pro-apoptotic proteins and activation of caspase-3(70).
4. Nigella sativa
Thymoquinone(TQ), is a phytochemical compound of the plant Nigella sativa. According to the study by the National University of Singapore, TQ inhibited both constitutive and IL-6-inducible STAT3 phosphorylation which correlated with the inhibition of c-Src and JAK2 activation. Vanadate reversed the TQ-induced down-regulation of STAT3 activation, suggesting the involvement of a protein tyrosine phosphatase. Indeed, we found that TQ can induce the expression of Src homology-2 phosphatase 2 that correlated with suppression of STAT3 activation. TQ also down-regulated the expression of STAT3-regulated gene products, such as cyclin D1, Bcl-2, Bcl-xL, survivin, Mcl-1 and vascular endothelial growth factor. Finally, TQ induced the accumulation of cells in sub-G1 phase, inhibited proliferation and induced apoptosis, as indicated by poly ADP ribose polymerase cleavage. TQ also significantly potentiated the apoptotic effects of thalidomide and bortezomib in MM cells.(71)
C. In traditional Chinese medicine perspective
A number of natural products isolated from Chinese herbs have been found to inhibit proliferation, induce apoptosis, suppress angiogenesis, retard metastasis and enhance chemotherapy, exhibiting anti-cancer potential both in vitro and in vivo, including flavonoids (gambogic acid, curcumin, wogonin and silibinin), alkaloids (berberine), terpenes (artemisinin, β-elemene, oridonin, triptolide, and ursolic acid), quinones (shikonin and emodin) and saponins (ginsenoside Rg3), which are isolated from Chinese medicinal herbs(72).
1. Sophora roots
Multiple myeloma (MM) is a hematological malignancy characterized by the uncontrolled proliferation of clonal plasma cells in bone marrow in the elderly. Matrine, a main alkaloid if Sophora roots, has been shown to inhibit cellular proliferation and induce apoptosis of various cancer cells. According to the study by the First Affiliated Hospital of Wenzhou Medical College, matrine could exert antiproliferative effects on myeloma cells and induce apoptosis of myeloma cells in vitro. The induction of apoptosis appeared to proceed via the mitochondrial pathway, including down-regulation of Bcl-2/Bax ratio, loss of Deltapsim, release of cyt c from mitochondria to cytosol, and activation of caspase-3(73).
2. the root and rhizomes of Rheum palmatum L.
Emodin is an active component of a traditional Chinese and Japanese medicine isolated from the root and rhizomes of Rheum palmatum L. According to the study by the Faculty of Pharmaceutical Sciences, Hoshi University, emodin significantly induces cytotoxicity in the human myeloma cells through the elimination of myeloid cell leukemia 1 (Mcl-1). Emodin inhibited interleukin-6-induced activation of Janus-activated kinase 2 (JAK2) and phosphorylation of signal transducer and activator of transcription 3 (STAT3), followed by the decreased expression of Mcl-1. Activation of caspase-3 and caspase-9 was triggered by emodin, but the expression of other antiapoptotic Bcl-2 family members, except Mcl-1, did not change in the presence of emodin(74).
3. Scutellaria radix
In the study to investigate the effects of the traditional Chinese herbal medicines Huang-Lian-Jie-Du-Tang (HLJDT), Gui-Zhi-Fu-Ling-Wan (GZFLW), and Huang-Lian-Tang (HLT) on the proliferation and apoptosis of myeloma cells by the Yamaguchi University, indicated that HLJDT inhibited the proliferation of myeloma cell lines and the survival of primary myeloma cells, especially MPC-1- immature myeloma cells, and induced apoptosis in myeloma cell lines via a mitochondria-mediated pathway by reducing mitochondrial membrane potential and activating caspase-9 and caspase-3. Further experiments confirmed that Scutellaria radix was responsible for the suppressive effect of HLJDT on myeloma cell proliferation, and the baicalein in Scutellaria radix showed strong growth inhibition and induction of apoptosis in comparison with baicalin or wogonin(75).
4. Cantharidin (CTD)
Cantharidin (CTD) a vesicant produced by beetles in the order Coleoptera has a long history in both folk and traditional medicine. In the study to investigate the possibility of CTD as a novel therapeutic agent for the patients with multiple myeloma, showed that CTD inhibited the cellular growth of human myeloma cell lines as well as freshly isolated myeloma cells in patients. Cultivation with CTD induced apoptosis of myeloma cells in a cell-cycle-independent manner. Treatment with CTD induced caspase-3, -8, and -9 activities, and it was completely blocked by each caspase inhibitor. We further examined the effect of CTD on the IL-6 signaling pathway in myeloma cells, and found that CTD inhibited phosphorylation of STAT3 at tyrosine 705 residue as early as 1 h after treatment and down-regulated the expression of the antiapoptotic bcl-xL protein. STAT3 directly bound and activated the transcription of bcl-xL gene promoter, resulting in the induction of the expression of bcl-xL in myeloma cells(76).
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Sources
(a) http://www.ncbi.nlm.nih.gov/pubmed/12521367
(b) http://www.ncbi.nlm.nih.gov/pubmed/18251580
(c) http://www.ncbi.nlm.nih.gov/pubmed/22073517
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(6) http://www.ncbi.nlm.nih.gov/pubmed/22762785
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Wednesday, February 27, 2013
Monday, February 25, 2013
Multiple myeloma
Multiple myeloma, also known as plasma cell myeloma or
Kahler's disease, is a types of abnormal growth of plasma cells
collected in the none marrow where they grow and multiple to interfere
with the production of normal blood cells. Paraprotein, an abnormal
antibody produced by the plasma cell myeloma not only can causes kidney
problem but also interference with the
Roche automated total bilirubin assay is caused by precipitate formation
of that can cause clinical confusion, according to the study by the
Harvard Medical School, Boston(1). Other study indicated that the production of paraproteins
caused spurious results on individual analytes including total bilirubin
(TBIL), direct bilirubin (DBIL), or HDL-cholesterol (HDL-C)(b). there is also a report of a 50 years old
chloride resistant metabolic alkalosis in a patient with hypercalcemia related to Multiple Myeloma (MM)(c).
1. The Symptoms
2. The Causes
3. Multiple myeloma- The Risk Factors
4. Multiple myeloma- The Complications
5. Diseases associated to Multiple myeloma
6. Multiple myeloma- Misdiagnosis
7. Multiple myeloma- The Diagnosis
8. Preventions
8.1. Diet to prevent Multiple myeloma
8.2. Phytochemicals to prevent Multiple myeloma
8.3. Antioxidants to prevent Multiple myeloma
9. Treatments
9.1. In conventional Medicine
9.1. 1. Standard treatments In conventional medicine perspective
9.1.2. Multiple myeloma - Initial therapy for myeloma treatments In conventional medicine perspective
9.1.3.Treatments for relapsed or treatment-resistant multiple myeloma In conventional medicine perspective
9.1.4. Treatments of symptoms In conventional medicine perspective
9.2. Treatments In Herbal medicine perspective
9.3. Treatments In traditional Chinese medicine perspective
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For over 100 healthy recipes, http://diseases-researches.blogspot.ca/p/blog-page_17.html
Sources
(a) http://www.ncbi.nlm.nih.gov/pubmed/12521367
(b) http://www.ncbi.nlm.nih.gov/pubmed/18251580
(c) http://www.ncbi.nlm.nih.gov/pubmed/22073517
chloride resistant metabolic alkalosis in a patient with hypercalcemia related to Multiple Myeloma (MM)(c).
1. The Symptoms
2. The Causes
3. Multiple myeloma- The Risk Factors
4. Multiple myeloma- The Complications
5. Diseases associated to Multiple myeloma
6. Multiple myeloma- Misdiagnosis
7. Multiple myeloma- The Diagnosis
8. Preventions
8.1. Diet to prevent Multiple myeloma
8.2. Phytochemicals to prevent Multiple myeloma
8.3. Antioxidants to prevent Multiple myeloma
9. Treatments
9.1. In conventional Medicine
9.1. 1. Standard treatments In conventional medicine perspective
9.1.2. Multiple myeloma - Initial therapy for myeloma treatments In conventional medicine perspective
9.1.3.Treatments for relapsed or treatment-resistant multiple myeloma In conventional medicine perspective
9.1.4. Treatments of symptoms In conventional medicine perspective
9.2. Treatments In Herbal medicine perspective
9.3. Treatments In traditional Chinese medicine perspective
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Super foods Library, Eat Yourself Healthy With The Best of the Best Nature Has to Offer
For over 100 healthy recipes, http://diseases-researches.blogspot.ca/p/blog-page_17.html
Sources
(a) http://www.ncbi.nlm.nih.gov/pubmed/12521367
(b) http://www.ncbi.nlm.nih.gov/pubmed/18251580
(c) http://www.ncbi.nlm.nih.gov/pubmed/22073517
Saturday, February 23, 2013
Chromium
Chromium(chromium 3+) is a essential mineral for the body in fat and carbohydrate metabolism, found abundantly in Beef, Eggs, Chicken, Oysters, Wheat germ, Green peppers, Banana, Apple, Etc.
1. Dietary chromium on glucose and insulin responses
In the study to to determine the effect of chromium on glucose and insulin responses in healthy subjects and in individuals with glucose intolerance or type 2 diabetes of the review summarizes data on 618 participants from the 15 trials that reported adequate data: 193 participants had type 2 diabetes and 425 were in good health or had impaired glucose tolerance, found that The meta-analysis showed no association between chromium and glucose or insulin concentrations among nondiabetic subjects, but a study of 155 diabetic subjects in China showed that chromium reduced glucose and insulin concentrations; the combined data from the 38 diabetic subjects in the other studies did not. Three trials reported data on Hb A(1c): one study each of persons with type 2 diabetes, persons with impaired glucose tolerance, and healthy subjects. The study of diabetic subjects in China was the only one to report that chromium significantly reduced Hb A(1c)(1).
2. Intravenous chromium treatment of Severe insulin resistance
Insulin resistance has been well documented in critically ill patients. Adequate blood sugar control has been associated with better wound healing, and better outcomes in selected patient populations. According to the study by the Texas A and M University, Corpus Christi, there is a report of a case of extreme insulin resistance in a 62-year-old woman with history of diabetes who suffered a cardiac arrest and respiratory failure, leading to aspiration pneumonia and septic shock requiring greater than 7000 units of insulin over a period of 12 h which was successfully treated with intravenous chromium replacement(2). Other study reported in using intravenous chromium to achieve glycemic control in a patient with extreme insulin resistance and acute critical illness. Prospective clinical trials using intravenous chromium may provide the means to optimize intensive insulin therapy for critically ill patients(2a).
3. Metabolic and physiologic response to chromium supplementation
In the study to to provide a comprehensive evaluation of chromium (Cr) supplementation on metabolic parameters in a cohort of type 2 diabetes mellitus subjects representing a wide phenotype range and to evaluate changes in "responders" and "nonresponders.", found that clinical response to Cr is more likely in insulin-resistant subjects who have more elevated fasting glucose and A(1c) levels. Chromium may reduce myocellular lipids and enhance insulin sensitivity in subjects with type 2 diabetes mellitus who do respond clinically independent of effects on weight or hepatic glucose production(3).
4. Supplemental chromium histidinate (CrHis)and Heat stress
In the study to evaluate the effects of supplemental chromium histidinate (CrHis) on performance and expressions of hepatic nuclear factors kappaB, an enhancer (NF-κB) and an inhibitor (IκBα) of activated B cells in heat-stressed Japanese quail (Coturnix coturnix japonica), found that heat stress depressed performance variables and augmented lipid peroxidation and supplemental CrHis alleviated oxidative stress through modulating expressions of stress-related hepatic nuclear transcription factors (NF-κB and IκBα)(4).
5. Chromium picolinate and chromium histidinate protects against renal dysfunction
In the study to investigate the effects of chromium picolinate (CrPic) and chromium histidinate (CrHis) on nuclear factor-kappa B (NF-κB) and nuclear factor-E2-related factor-2 (Nrf2) pathway in the rat kidney by the Faculty of Veterinary Science, Firat University, the result show that in kidney tissue CrHis/CrPic increases Nrf2 level, parallelly decreases NF-κB and partially restores IκBα levels in HFD/STZ group, suggesting that CrPic and CrHis may play a role in antioxidant defense system via the Nrf2 pathway by reducing inflammation through NF-κβ p65 inhibition. Moreover, a greater reduction in NF-κB expression and greater increases in expressions of IκBα and Nrf2 in diabetic rats supplemented with CrHis than rats supplemented with CrPic suggest that CrHis has more favorable effects than CrPic(5).
6. Chromium histidinate on renal function, oxidative stress, and heat-shock
Chromium is an essential element for carbohydrate, fat, and protein metabolism. In the study to investigate the effects of CrHis on serum parameters of renal function, on oxidative stress markers (malondialdehyde [MDA] and 8-isoprostane), and on the expression of heat-shock proteins (HSPs) in rats, indicated that Chromium histidinate significantly decreased lipid peroxidation levels and HSP expression in the kidneys of experimentally induced diabetic rats and it supported the efficacy of CrHis in reducing renal risk factors and impairment because of diabetes(6).
7. Anti-diabetic activity of chromium picolinate and biotin
In the study to evaluate the anti-diabetic effects of chromium picolinate (CrPic) and biotin supplementations in type 2 diabetic rats, by Firat University, indicated that the supplements decreased the expression of NF-κB in diabetic rats (P < 0·05). Results of the present study revealed that supplementing CrPic and biotin alone or in a combination exerts anti-diabetic activities, probably through modulation of PPAR-γ, IRS-1 and NF-κB proteins(7).
8. Is chromium an essential trace element?
It has been recognized that chromium is an essential trace element associated with carbohydrate metabolism, and chromium deficiency causes an impaired glucose tolerance. According to the study by Kansai University, the amount of chromium absorbed in humans estimated from chromium intake (20 to 80 μg/day), chromium absorption rate (1%), and urinary chromium excretion (<1 μg/day) is less than 1 μg/day, which is much lower than those of other essential trace elements. In addition, because there is an inconsistency between the chromium concentration in food and chromium intake, chromium intake seems to be dependent on chromium contamination during food processing and cooking. It is concluded that there is a high possibility that chromium is not an essential trace element(8).
9. Cr supplementation as a growth enhancer
In a growth trial conducted on juvenile mirror carp (Cyprinus carpio L.) for 8 weeks and to compare the efficacy of three chromium (Cr) compounds (Cr chloride, Cr picolinate, and Cr yeast) at a level 0.5 mg/kg as a potential growth enhancer, showed that there is a significantly (P < 0.05) increased DNA damage in fish fed on high level of Cr chloride (2.0 mg/kg) but the other treatments were not significantly different (P > 0.05) from the control groups. The concentration of Cr in the liver, gut, and whole fish tissues increased with increasing dietary Cr supplementation. Overall, Cr supplementation at a level 0.5 mg/kg from different sources may affect growth performance in carp by activation of some key liver enzymes (HK and G6PD)(9).
10. Chromium and Cholesterol
Chromium (Cr(3+)) supplementation facilitates normal protein, fat, and carbohydrate metabolism, and is widely used by the public in many countries.According to the study by the Louisiana State University Health Sciences Center, Chromium niacinate lowers blood levels of proinflammatory cytokines (TNF-alpha, IL-6, CRP), oxidative stress, and lipids levels in diabetic rats, and appears to be a more effective form of Cr(3+) supplementation. This study suggests that Cr(3+) supplementation can lower the risk of vascular inflammation in diabetes(10). Other study suggested a mechanism of Cr3+ action that fits with long-standing claims of its role in cholesterol homeostasis(10a).
11. Chromium and weight loss
Chromium is an essential nutrient involved in the regulation of carbohydrate and lipid metabolism. According to the study by the Beltsville Human Nutrition Research Center, the effects of chromium on body composition are controversial but are supported by animal studies, which increase their validity. A subject's response to chromium depends on his or her chromium status, diet consumed, type and amount of supplemental chromium, and study duration. There have been no confirmed negative effects of chromium in nutritional studies. Chromium is only a small part of the puzzle in the control of weight loss and body composition, and its effects, if present, will be small compared with those of exercise and a well-balanced diet(11). Other study indicated that under conditions of controlled energy intake, CrPic supplementation of women did not independently influence body weight or composition or iron status. Thus, claims that supplementation of 200 microg of Cr as CrPic promotes weight loss and body composition changes are not supported(11a).
12. Chromium picolinate on body composition and skeletal muscle in older men
In the study to examine a total of in 18 men (age range 56-69 yr). The effects of chromium picolinate (CrPic) supplementation and resistance training (RT) on skeletal muscle size, strength, and power and whole body composition, found that high-dose CrPic supplementation did not enhance muscle size, strength, or power development or lean body mass accretion in older men during a RT program, which had significant, independent effects on these measurements(12).
13. Chromium deficiency and cardiovascular risk
Recent measurements have demonstrated that plasma chromium levels in patients with coronary artery disease are very much lower than in normal subjects. According to the study by Dr. Simonoff M., chromium deficiency leads to impaired lipid and glucide metabolism and results in high circulating insulin levels, the probable consequences of which suggest that chromium deficiency may be a primary risk factor in cardiovascular disease(13).
14. Chromium in metabolic and cardiovascular disease
According to the study by Diabetes Research Institute & Academical Hospital Munich-Schwabing, Munich, supplementation with chromium picolinate, a stable and highly bioavailable form of chromium, has been shown to reduce insulin resistance and to help reduce the risk of cardiovascular disease and type 2 diabetes. Since chromium supplementation is a safe treatment, further research is necessary to resolve the confounding data. The existing data suggest to concentrate future studies on certain forms as chromium picolinate and doses as at least 200 mcg per day(14).
15. Chromium(III) on obesity
Insulin resistance has been shown to be the major contributing factor to the metabolic syndrome, which comprises a cluster of risk factors for metabolic aberrations such as obesity, dyslipidemia, hypertension, and hyperglycemia. According to the study by InterHealth Research Center, Benicia, numerous in vitro and in vivo studies suggest that chromium supplements, particularly niacin-bound chromium or chromium-nicotinate, may be effective in attenuating insulin resistance and lowering plasma cholesterol levels. Utilizing the powerful technology of nutrigenomics to identify the genes regulated by chromium supplementation may shed some light on the underlying mechanisms of chromium-gene interactions, and thus provide strategies to mitigate and prevent insulin-resistance-related disorders(15).
16. chromium in the +3 and +6 oxidation states and cancers
Drinking water supplies in many geographic areas contain chromium in the +3 and +6 oxidation states. According to the Brown University, Cr(VI) has high environmental mobility and can originate from anthropogenic and natural sources. Acidic environments with high organic content promote the reduction of Cr(VI) to nontoxic Cr(III). The opposite process of Cr(VI) formation from Cr(III) also occurs, particularly in the presence of common minerals containing Mn(IV) oxides. Limited epidemiological evidence for Cr(VI) ingestion is suggestive of elevated risks for stomach cancers(16).
17. Chromium in atypical depression
In a placebo-controlled, double-blind, pilot study of CP conducted in 15 patients with DSM-IV major depressive disorder, atypical type. Patients received 600 micro g of CP or matching placebo (PBO) for 8 weeks, showed that Chromium picolinate shows promising antidepressant effects in atypical depression. Its mechanism of action may relate to 5HT2A downregulation, increased insulin sensitivity, or to other effects(18).
18. Chromium and depression
According to the study by McLeod MN, Golden RN. in the describing the response to chromium monotherapy, eight patients with refractory mood disorders received chromium supplements and described dramatic improvements in their symptoms and functioning. In several instances, single-blind trials confirmed specificity of response to chromium. Side-effects were rare and mild, and most commonly included enhanced dreaming and mild psychomotor activation(18).
19. Longevity effect of chromium picolinate
The first rodent longevity study with the insulin-sensitizing nutrient chromium picolinate has reported a dramatic increase in both median and maximal lifespan. But according to the study by the, although the observed moderate reductions in serum glucose imply a decreased rate of tissue glycation reactions, it is unlikely that this alone can account for the substantial impact on lifespan; an effect on central neurohormonal regulation can reasonably be suspected. Recent studies highlight the physiological role of insulin as a modulator of brain function, promoting brain insulin activity with chromium picolinate may help to maintain the hypothalamus in a more functionally youthful state; increased hypothalamic catecholamine activity, sensitization of insulin-responsive central mechanisms regulating appetite and thermogenesis, and perhaps trophic effects on brain neurons may play a role in this regard. Since both the pineal gland and thymus are dependent on insulin activity, chromium may aid their function as well. Thus, the longevity effect of chromium picolinate may depend primarily on delay or reversal of various age-related changes in the body's hormonal and neural milieu. A more general strategy of hypothalamic 'rejuvenation' is proposed for extending healthful lifespan(19).
Sources
(1) http://www.ncbi.nlm.nih.gov/pubmed/12081828
(2) http://www.ncbi.nlm.nih.gov/pubmed/23125907
(2a) http://www.ncbi.nlm.nih.gov/pubmed/18595867
(3) http://www.ncbi.nlm.nih.gov/pubmed/20022616
(4) http://www.ncbi.nlm.nih.gov/pubmed/23398428
(5) http://www.ncbi.nlm.nih.gov/pubmed/22483164
(6) http://www.ncbi.nlm.nih.gov/pubmed/19616452
(7) http://www.ncbi.nlm.nih.gov/pubmed/23211098
(8) http://www.ncbi.nlm.nih.gov/pubmed/23095360
(9) http://www.ncbi.nlm.nih.gov/pubmed/22351105
(10) http://www.ncbi.nlm.nih.gov/pubmed/17854708
(10a) http://www.ncbi.nlm.nih.gov/pubmed/21311039
(11) http://www.ncbi.nlm.nih.gov/pubmed/9763876
(11a) http://www.ncbi.nlm.nih.gov/pubmed/17291720
(12) http://www.ncbi.nlm.nih.gov/pubmed/9887110
(13) http://www.ncbi.nlm.nih.gov/pubmed/6386156
(14) http://www.ncbi.nlm.nih.gov/pubmed/17952838
(15) http://www.ncbi.nlm.nih.gov/pubmed/18636317
(16) http://www.ncbi.nlm.nih.gov/pubmed/21766833
(17) http://www.ncbi.nlm.nih.gov/pubmed/12559660
(18) http://www.ncbi.nlm.nih.gov/pubmed/11343609
(19) http://www.ncbi.nlm.nih.gov/pubmed/7838011
Toxicity
The potential value and toxicity of chromium picolinate
Chromium has played a essential role in maintaining proper carbohydrate and lipid metabolism in mammals and chromium dietary supplementation has been postulated to potentially have effects on body composition, including reducing fat mass and increasing lean body mass.According to the study by The University of Alabama, over a decade of human studies with Cr(pic)(3) indicate that the supplement has not demonstrated effects on the body composition of healthy individuals, even when taken in combination with an exercise training programme. Recent cell culture and in vivo rat studies have indicated that Cr(pic)(3) probably generates oxidative damage of DNA and lipids and is mutagenic, although the significance of these results on humans taking the supplement for prolonged periods of time is unknown and should be a focus for future investigations. Given that in vitro studies suggest that other forms of chromium used as nutritional supplements, such as chromium chloride, are unlikely to be susceptible to generating this type of oxidative damage, the use of these compounds, rather than Cr(pic)(3), would appear warranted. Potential neurological effects (both beneficial and deleterious) from Cr(pic)(3) supplementation require further study(a).
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For over 100 healthy recipes, http://diseases-researches.blogspot.ca/p/blog-page_17.html
Sources
(a) http://www.ncbi.nlm.nih.gov/pubmed/12656641
1. Dietary chromium on glucose and insulin responses
In the study to to determine the effect of chromium on glucose and insulin responses in healthy subjects and in individuals with glucose intolerance or type 2 diabetes of the review summarizes data on 618 participants from the 15 trials that reported adequate data: 193 participants had type 2 diabetes and 425 were in good health or had impaired glucose tolerance, found that The meta-analysis showed no association between chromium and glucose or insulin concentrations among nondiabetic subjects, but a study of 155 diabetic subjects in China showed that chromium reduced glucose and insulin concentrations; the combined data from the 38 diabetic subjects in the other studies did not. Three trials reported data on Hb A(1c): one study each of persons with type 2 diabetes, persons with impaired glucose tolerance, and healthy subjects. The study of diabetic subjects in China was the only one to report that chromium significantly reduced Hb A(1c)(1).
2. Intravenous chromium treatment of Severe insulin resistance
Insulin resistance has been well documented in critically ill patients. Adequate blood sugar control has been associated with better wound healing, and better outcomes in selected patient populations. According to the study by the Texas A and M University, Corpus Christi, there is a report of a case of extreme insulin resistance in a 62-year-old woman with history of diabetes who suffered a cardiac arrest and respiratory failure, leading to aspiration pneumonia and septic shock requiring greater than 7000 units of insulin over a period of 12 h which was successfully treated with intravenous chromium replacement(2). Other study reported in using intravenous chromium to achieve glycemic control in a patient with extreme insulin resistance and acute critical illness. Prospective clinical trials using intravenous chromium may provide the means to optimize intensive insulin therapy for critically ill patients(2a).
3. Metabolic and physiologic response to chromium supplementation
In the study to to provide a comprehensive evaluation of chromium (Cr) supplementation on metabolic parameters in a cohort of type 2 diabetes mellitus subjects representing a wide phenotype range and to evaluate changes in "responders" and "nonresponders.", found that clinical response to Cr is more likely in insulin-resistant subjects who have more elevated fasting glucose and A(1c) levels. Chromium may reduce myocellular lipids and enhance insulin sensitivity in subjects with type 2 diabetes mellitus who do respond clinically independent of effects on weight or hepatic glucose production(3).
4. Supplemental chromium histidinate (CrHis)and Heat stress
In the study to evaluate the effects of supplemental chromium histidinate (CrHis) on performance and expressions of hepatic nuclear factors kappaB, an enhancer (NF-κB) and an inhibitor (IκBα) of activated B cells in heat-stressed Japanese quail (Coturnix coturnix japonica), found that heat stress depressed performance variables and augmented lipid peroxidation and supplemental CrHis alleviated oxidative stress through modulating expressions of stress-related hepatic nuclear transcription factors (NF-κB and IκBα)(4).
5. Chromium picolinate and chromium histidinate protects against renal dysfunction
In the study to investigate the effects of chromium picolinate (CrPic) and chromium histidinate (CrHis) on nuclear factor-kappa B (NF-κB) and nuclear factor-E2-related factor-2 (Nrf2) pathway in the rat kidney by the Faculty of Veterinary Science, Firat University, the result show that in kidney tissue CrHis/CrPic increases Nrf2 level, parallelly decreases NF-κB and partially restores IκBα levels in HFD/STZ group, suggesting that CrPic and CrHis may play a role in antioxidant defense system via the Nrf2 pathway by reducing inflammation through NF-κβ p65 inhibition. Moreover, a greater reduction in NF-κB expression and greater increases in expressions of IκBα and Nrf2 in diabetic rats supplemented with CrHis than rats supplemented with CrPic suggest that CrHis has more favorable effects than CrPic(5).
6. Chromium histidinate on renal function, oxidative stress, and heat-shock
Chromium is an essential element for carbohydrate, fat, and protein metabolism. In the study to investigate the effects of CrHis on serum parameters of renal function, on oxidative stress markers (malondialdehyde [MDA] and 8-isoprostane), and on the expression of heat-shock proteins (HSPs) in rats, indicated that Chromium histidinate significantly decreased lipid peroxidation levels and HSP expression in the kidneys of experimentally induced diabetic rats and it supported the efficacy of CrHis in reducing renal risk factors and impairment because of diabetes(6).
7. Anti-diabetic activity of chromium picolinate and biotin
In the study to evaluate the anti-diabetic effects of chromium picolinate (CrPic) and biotin supplementations in type 2 diabetic rats, by Firat University, indicated that the supplements decreased the expression of NF-κB in diabetic rats (P < 0·05). Results of the present study revealed that supplementing CrPic and biotin alone or in a combination exerts anti-diabetic activities, probably through modulation of PPAR-γ, IRS-1 and NF-κB proteins(7).
8. Is chromium an essential trace element?
It has been recognized that chromium is an essential trace element associated with carbohydrate metabolism, and chromium deficiency causes an impaired glucose tolerance. According to the study by Kansai University, the amount of chromium absorbed in humans estimated from chromium intake (20 to 80 μg/day), chromium absorption rate (1%), and urinary chromium excretion (<1 μg/day) is less than 1 μg/day, which is much lower than those of other essential trace elements. In addition, because there is an inconsistency between the chromium concentration in food and chromium intake, chromium intake seems to be dependent on chromium contamination during food processing and cooking. It is concluded that there is a high possibility that chromium is not an essential trace element(8).
9. Cr supplementation as a growth enhancer
In a growth trial conducted on juvenile mirror carp (Cyprinus carpio L.) for 8 weeks and to compare the efficacy of three chromium (Cr) compounds (Cr chloride, Cr picolinate, and Cr yeast) at a level 0.5 mg/kg as a potential growth enhancer, showed that there is a significantly (P < 0.05) increased DNA damage in fish fed on high level of Cr chloride (2.0 mg/kg) but the other treatments were not significantly different (P > 0.05) from the control groups. The concentration of Cr in the liver, gut, and whole fish tissues increased with increasing dietary Cr supplementation. Overall, Cr supplementation at a level 0.5 mg/kg from different sources may affect growth performance in carp by activation of some key liver enzymes (HK and G6PD)(9).
10. Chromium and Cholesterol
Chromium (Cr(3+)) supplementation facilitates normal protein, fat, and carbohydrate metabolism, and is widely used by the public in many countries.According to the study by the Louisiana State University Health Sciences Center, Chromium niacinate lowers blood levels of proinflammatory cytokines (TNF-alpha, IL-6, CRP), oxidative stress, and lipids levels in diabetic rats, and appears to be a more effective form of Cr(3+) supplementation. This study suggests that Cr(3+) supplementation can lower the risk of vascular inflammation in diabetes(10). Other study suggested a mechanism of Cr3+ action that fits with long-standing claims of its role in cholesterol homeostasis(10a).
11. Chromium and weight loss
Chromium is an essential nutrient involved in the regulation of carbohydrate and lipid metabolism. According to the study by the Beltsville Human Nutrition Research Center, the effects of chromium on body composition are controversial but are supported by animal studies, which increase their validity. A subject's response to chromium depends on his or her chromium status, diet consumed, type and amount of supplemental chromium, and study duration. There have been no confirmed negative effects of chromium in nutritional studies. Chromium is only a small part of the puzzle in the control of weight loss and body composition, and its effects, if present, will be small compared with those of exercise and a well-balanced diet(11). Other study indicated that under conditions of controlled energy intake, CrPic supplementation of women did not independently influence body weight or composition or iron status. Thus, claims that supplementation of 200 microg of Cr as CrPic promotes weight loss and body composition changes are not supported(11a).
12. Chromium picolinate on body composition and skeletal muscle in older men
In the study to examine a total of in 18 men (age range 56-69 yr). The effects of chromium picolinate (CrPic) supplementation and resistance training (RT) on skeletal muscle size, strength, and power and whole body composition, found that high-dose CrPic supplementation did not enhance muscle size, strength, or power development or lean body mass accretion in older men during a RT program, which had significant, independent effects on these measurements(12).
13. Chromium deficiency and cardiovascular risk
Recent measurements have demonstrated that plasma chromium levels in patients with coronary artery disease are very much lower than in normal subjects. According to the study by Dr. Simonoff M., chromium deficiency leads to impaired lipid and glucide metabolism and results in high circulating insulin levels, the probable consequences of which suggest that chromium deficiency may be a primary risk factor in cardiovascular disease(13).
14. Chromium in metabolic and cardiovascular disease
According to the study by Diabetes Research Institute & Academical Hospital Munich-Schwabing, Munich, supplementation with chromium picolinate, a stable and highly bioavailable form of chromium, has been shown to reduce insulin resistance and to help reduce the risk of cardiovascular disease and type 2 diabetes. Since chromium supplementation is a safe treatment, further research is necessary to resolve the confounding data. The existing data suggest to concentrate future studies on certain forms as chromium picolinate and doses as at least 200 mcg per day(14).
15. Chromium(III) on obesity
Insulin resistance has been shown to be the major contributing factor to the metabolic syndrome, which comprises a cluster of risk factors for metabolic aberrations such as obesity, dyslipidemia, hypertension, and hyperglycemia. According to the study by InterHealth Research Center, Benicia, numerous in vitro and in vivo studies suggest that chromium supplements, particularly niacin-bound chromium or chromium-nicotinate, may be effective in attenuating insulin resistance and lowering plasma cholesterol levels. Utilizing the powerful technology of nutrigenomics to identify the genes regulated by chromium supplementation may shed some light on the underlying mechanisms of chromium-gene interactions, and thus provide strategies to mitigate and prevent insulin-resistance-related disorders(15).
16. chromium in the +3 and +6 oxidation states and cancers
Drinking water supplies in many geographic areas contain chromium in the +3 and +6 oxidation states. According to the Brown University, Cr(VI) has high environmental mobility and can originate from anthropogenic and natural sources. Acidic environments with high organic content promote the reduction of Cr(VI) to nontoxic Cr(III). The opposite process of Cr(VI) formation from Cr(III) also occurs, particularly in the presence of common minerals containing Mn(IV) oxides. Limited epidemiological evidence for Cr(VI) ingestion is suggestive of elevated risks for stomach cancers(16).
17. Chromium in atypical depression
In a placebo-controlled, double-blind, pilot study of CP conducted in 15 patients with DSM-IV major depressive disorder, atypical type. Patients received 600 micro g of CP or matching placebo (PBO) for 8 weeks, showed that Chromium picolinate shows promising antidepressant effects in atypical depression. Its mechanism of action may relate to 5HT2A downregulation, increased insulin sensitivity, or to other effects(18).
18. Chromium and depression
According to the study by McLeod MN, Golden RN. in the describing the response to chromium monotherapy, eight patients with refractory mood disorders received chromium supplements and described dramatic improvements in their symptoms and functioning. In several instances, single-blind trials confirmed specificity of response to chromium. Side-effects were rare and mild, and most commonly included enhanced dreaming and mild psychomotor activation(18).
19. Longevity effect of chromium picolinate
The first rodent longevity study with the insulin-sensitizing nutrient chromium picolinate has reported a dramatic increase in both median and maximal lifespan. But according to the study by the, although the observed moderate reductions in serum glucose imply a decreased rate of tissue glycation reactions, it is unlikely that this alone can account for the substantial impact on lifespan; an effect on central neurohormonal regulation can reasonably be suspected. Recent studies highlight the physiological role of insulin as a modulator of brain function, promoting brain insulin activity with chromium picolinate may help to maintain the hypothalamus in a more functionally youthful state; increased hypothalamic catecholamine activity, sensitization of insulin-responsive central mechanisms regulating appetite and thermogenesis, and perhaps trophic effects on brain neurons may play a role in this regard. Since both the pineal gland and thymus are dependent on insulin activity, chromium may aid their function as well. Thus, the longevity effect of chromium picolinate may depend primarily on delay or reversal of various age-related changes in the body's hormonal and neural milieu. A more general strategy of hypothalamic 'rejuvenation' is proposed for extending healthful lifespan(19).
Sources
(1) http://www.ncbi.nlm.nih.gov/pubmed/12081828
(2) http://www.ncbi.nlm.nih.gov/pubmed/23125907
(2a) http://www.ncbi.nlm.nih.gov/pubmed/18595867
(3) http://www.ncbi.nlm.nih.gov/pubmed/20022616
(4) http://www.ncbi.nlm.nih.gov/pubmed/23398428
(5) http://www.ncbi.nlm.nih.gov/pubmed/22483164
(6) http://www.ncbi.nlm.nih.gov/pubmed/19616452
(7) http://www.ncbi.nlm.nih.gov/pubmed/23211098
(8) http://www.ncbi.nlm.nih.gov/pubmed/23095360
(9) http://www.ncbi.nlm.nih.gov/pubmed/22351105
(10) http://www.ncbi.nlm.nih.gov/pubmed/17854708
(10a) http://www.ncbi.nlm.nih.gov/pubmed/21311039
(11) http://www.ncbi.nlm.nih.gov/pubmed/9763876
(11a) http://www.ncbi.nlm.nih.gov/pubmed/17291720
(12) http://www.ncbi.nlm.nih.gov/pubmed/9887110
(13) http://www.ncbi.nlm.nih.gov/pubmed/6386156
(14) http://www.ncbi.nlm.nih.gov/pubmed/17952838
(15) http://www.ncbi.nlm.nih.gov/pubmed/18636317
(16) http://www.ncbi.nlm.nih.gov/pubmed/21766833
(17) http://www.ncbi.nlm.nih.gov/pubmed/12559660
(18) http://www.ncbi.nlm.nih.gov/pubmed/11343609
(19) http://www.ncbi.nlm.nih.gov/pubmed/7838011
Toxicity
The potential value and toxicity of chromium picolinate
Chromium has played a essential role in maintaining proper carbohydrate and lipid metabolism in mammals and chromium dietary supplementation has been postulated to potentially have effects on body composition, including reducing fat mass and increasing lean body mass.According to the study by The University of Alabama, over a decade of human studies with Cr(pic)(3) indicate that the supplement has not demonstrated effects on the body composition of healthy individuals, even when taken in combination with an exercise training programme. Recent cell culture and in vivo rat studies have indicated that Cr(pic)(3) probably generates oxidative damage of DNA and lipids and is mutagenic, although the significance of these results on humans taking the supplement for prolonged periods of time is unknown and should be a focus for future investigations. Given that in vitro studies suggest that other forms of chromium used as nutritional supplements, such as chromium chloride, are unlikely to be susceptible to generating this type of oxidative damage, the use of these compounds, rather than Cr(pic)(3), would appear warranted. Potential neurological effects (both beneficial and deleterious) from Cr(pic)(3) supplementation require further study(a).
Natural Remedies for Dementia Memory Loss Reversal
Guarantee to Stop Progression and Reverse Memory Loss in Alzheimer and Dementia with step by step instructions through Scientific Studies within 2 Months or your Money back
Super foods Library, Eat Yourself Healthy With The Best of the Best Nature Has to Offer
For over 100 healthy recipes, http://diseases-researches.blogspot.ca/p/blog-page_17.html
Sources
(a) http://www.ncbi.nlm.nih.gov/pubmed/12656641
Friday, February 22, 2013
Calcium
Calcium, a trace mineral plays an important role in build and maintain
strong bones and teeth, found abundantly in meat, poultry, fish, nut,
seeds, bean, etc. As we age, calcium is absorbed less effectively.
1. Osteoporosis: vitamin D and calcium
Osteoporosis is a bone disease that predisposes to fractures. Sufficient intake of calcium and vitamin D is recommended for prevention and treatment. According to the study of 28,406 respondents aged 50 or older to the 2009 Canadian Community Health Survey (CCHS)--Healthy Aging, found that
In 2009, 19.2% of women and 3.4% of men aged 50 or older reported having been diagnosed with osteoporosis; the 2004 rates were similar. Age, sex and household income were associated with the probability of reporting osteoporosis. In 2004, based on dietary and supplement intake, 45% to 69% of the population aged 50 or older had inadequate intake of calcium, and 54% to 66% had inadequate intake of vitamin D(1).
2. Vitamin D3, calcium and reduced risk of fractures and falls
According to the study by the research team of Dr. Cranney A, in most trials, the effects of vitamin D and calcium could not be separated. Vitamin D(3) (>700 IU/day) with calcium supplementation compared to placebo has a small beneficial effect on BMD, and reduces the risk of fractures and falls although benefit may be confined to specific subgroups. Vitamin D intake above current dietary reference intakes was not reported to be associated with an increased risk of adverse events. However, most trials of higher doses of vitamin D were not adequately designed to assess long-term harms(2).
3. Vitamin D, calcium and the importance of other vitamins
Osteoporosis is a major health disorder associated with an increased risk of fracture. Nutrition is among the modifiable factors that influence the risk of osteoporosis and fracture. Calcium and vitamin D play important roles in improving bone mineral density and reducing the risk of fracture. According to the study by American University of Beirut, deficiencies in vitamins C, E, and K are also associated with compromised bone health; this effect may be modified by smoking, estrogen use or hormonal therapy after menopause, calcium intake, and vitamin D(3).
4. Calcium, dairy products, and bone health in children and young adults
In the review of Medline (National Library of Medicine, Bethesda, MD) search conducted for studies published on the relationship between milk, dairy products, or calcium intake and bone mineralization or fracture risk in children and young adults (1-25 years) yielded 58 studies: 22 cross-sectional studies; 13 retrospective studies; 10 longitudinal prospective studies; and 13 randomized, controlled trials found to ne supported of nutrition guidelines focused specifically on increasing milk or other dairy product intake for promoting child and adolescent bone mineralization(4).
5. The dosage of calcium and life style risks
According to the study by Aarhus University, secondary hyperparathyroidism caused by calcium and vitamin D insufficiency may reduce bone mass and strength and increase fracture risk and should be avoided. Since calcium supplementation has been associated with an increased risk of cardiovascular complications and renal stones, the dose should be tailored to the habitual daily calcium intake. Lifestyle-related risk factors (smoking, alcohol consumption, lack of physical activity and low body weight) should be addressed. The antifracture efficacy of antiresorptive and anabolic treatment for osteoporosis has not been documented in larger randomized controlled studies(5).
6. Calcium and Physiology and cell biology of acupuncture
In the article presenting a novel model of acupuncture physiology based on cellular calcium activation by an acoustic shear wave (ASW) generated by the mechanical movement of the needle with an acupuncture needle was driven by a piezoelectric transducer at 100 Hz or below, showed that the cell level, the ASW activated intracellular Ca(2+) transients and oscillations in fibroblasts and endothelial, ventricular myocytes and neuronal PC-12 cells along with frequency-amplitude tuning and memory capabilities. In contrast with traditional acupuncture models, the signal source is derived from the total acoustic energy. ASW signaling makes use of the anisotropy of elasticity of tissues as its waveguides for transmission and that cell activation is not based on the nervous system(6).
7. Calcium and cell physiology
According to the study by the University of Florida, in excitable cells, the coordination of changing Ca(2+) concentrations at global (cellular) and well-defined subcellular spaces through the course of membrane depolarization can now be conceptualized in the context of disease processes such as cardiac arrhythmogenesis. The spatial and temporal dimensions of Ca(2+) signaling are similarly important in non-excitable cells, such as endothelial and epithelial cells, to regulate multiple signaling pathways that participate in organ homeostasis as well as cellular organization and essential secretory processes(7).
8. Calcium and S100 proteins
S100 proteins play a crucial role in multiple important biological processes in vertebrate organisms acting predominantly as calcium signal transmitters.According to the study by the Polish Academy of Sciences, after four Ca(2+) ions bind, it undergoes a dramatic conformational change, resulting in exposure, in each of its two identical subunits, a large hydrophobic cleft that binds to target proteins. It has been shown that abnormal expression of S100A1 is strongly correlated with a number of severe human diseases: cardiomyopathy and neurodegenerative disorders(8).
9. Calcium and aluminum salt
Most humans living in industrialized societies are routinely exposed to bioavailable aluminum salts in the form of additives-in commercially-prepared foods, alum-clarified drinking water, certain pharmaceuticals, sunscreens, and other topical applications. Minute amounts of this aluminum are absorbed into the circulation. Trace aluminum levels cross the blood-brain barrier and progressively accumulate in large pyramidal neurons of the hippocampus, cortex, and other brain regions vulnerable in Alzheimer's disease. According to the study by the St George Hospital Campus, intraneuronal aluminum interferes with Ca2+ metabolism in the aged brain and describes a way to test this hypothesis. This paper reviews: 1) major changes that occur in brain Ca2+ homeostasis and Ca2+ signaling, subtly with aging and more overtly in Alzheimer's disease; and 2) evidence from the scientific literature that aluminum causes these same changes in neurons(9).
10. calcium and aluminum in Neurodegenerative disorders
Both calcium and aluminum have been implicated in the cell damage and death that occurs in several neurodegenerative disorders including Alzheimer's disease (AD). In the study to examine the effects of experimentally elevated intraneuronal levels of aluminum ([Al]i) and/or calcium ([Ca2+]i) on neuronal degeneration and antigenic alterations in the microtubule-associated protein tau in cell cultures of rat hippocampus and human cerebral cortex, showed that Exposure of cultures to Al3+ alone (200 microM) for up to 6 d did not result in neuronal degeneration. Neurons exposed to the divalent cation ionophore A23187 degenerated within 4 h when Ca2+ was present in the culture medium whether or not Al3+ was present. Measurements of [Ca2+]i using the calcium indicator dye fura-2 demonstrated a direct relationship between increased [Ca2+]i and neuronal degeneration. In contrast, neurons did not degenerate when exposed to A23187 in the presence of Al3+ and the absence of Ca2+, despite a 10-fold elevation in [Al]i as measured by laser microprobe mass spectrometry. Calcium influx, but not aluminum influx, elicited antigenic changes in tau similar to those seen in AD neurofibrillary tangles. Neurons exposed to glutamate in the presence of Al3+ but in the absence of Ca2+ were not vulnerable to injury. Finally, increased [Al]i occurred in neurons that degenerated as the result of exposure to glutamate indicating that aluminum associates with degenerating neurons(10).
11. Neuronal calcium homeostasis in the aging nervous system
Maintenance of the cellular calcium homeostasis plays an important role for neuronal cell function and interneuronal cell to cell communication. Therefore, alterations of the neuronal Ca2+ homeostasis may play a crucial role for brain aging in general and for age-related deficits in cognitive functions particularly.
Numerous studies indicate various disturbances of the Ca2+ homeostasis on different levels like Ca2+ channel properties, 45Ca2+ uptake, or Ca2+ binding proteins. Investigations on alterations of the free intracellular calcium concentration ([Ca2+]i) in presynaptic synaptosomal preparations led to inconsistent results reporting increased or unchanged [Ca2+]i in aged animals, according to the Central Institute of Mental Health, Dept. Psychopharmacology(11).
12. Disruption of calcium homeostasis and Alzheimer's disease (AD)
Oligomerization, conformational changes, and the consequent neurodegeneration of Alzheimer's β-amyloid protein (AβP) play crucial roles in the pathogenesis of Alzheimer's disease (AD). Mounting evidence suggests that oligomeric AβPs cause the disruption of calcium homeostasis, eventually leading to neuronal death, according to the School of Pharmaceutical Sciences, Kyushu University of Health and Welfare(12).
13. BK Channels in Cardiovascular Diseases and Aging
Aging is a major risk factor for cardiovascular diseases, one of the main world-wide causes of death. Several structural and functional changes occur in the cardiovascular system during the aging process and the mechanisms. BK channels are transmembrane proteins that play a key role in many physiological processes, including regulation of vascular tone.In vascular smooth muscle cells, BK opening and the consequent efflux of potassium (K(+)) leads to membrane hyperpolarization, which is followed by the closure of voltage-dependent Ca(2+) channels, reduction of Ca(2+) entry and vasodilatation. BK regulates nitric oxide-mediated vasodilatation and thus is crucial for normal endothelial function(13).
14. Ca(2+) waves regulate blood vessel tone and vasomotion
Agonist-stimulated smooth muscle Ca(2+) waves regulate blood vessel tone and vasomotion.The Pharmacology, and Therapeutics, University of British Columbia, present a first report of endothelin-1 stimulated waves of Ca(2+) depletion from the sarcoplasmic reticulum of vascular smooth muscle cells using a calsequestrin-targeted Ca(2+) indicator and confirmed that these waves are due to regenerative Ca(2+)-induced Ca(2+) release by the receptors for inositol 1,4,5-trisphosphate(14).
15. Calcium ion channel blockers on sperm fertilization
In the stduy to evaluate the effects of calcium ion (Ca2+) channel blockers on male fertility potential, showed that therapeutic administrations of calcium antagonists for hypertension control cause reversible male infertility associated with an IVF failure. A mechanism of inhibition of sperm fertilizing potential through insertion of lipophilic calcium ion antagonists into the lipid bilayer of the sperm plasma membrane is consistent with our in vitro studies(15).
16. Ca(2+)and enzymes
The processes of excitation-contraction (EC) coupling consume large amounts of energy that need to be replenished by oxidative phosphorylation in mitochondria. Since Ca(2+) activates key enzymes of the Krebs cycle in the mitochondrial matrix, it is important to understand the mechanisms and kinetics of mitochondrial Ca(2+) uptake to delineate how in cardiac myocytes, energy supply is efficiently matched to demand. According to the study by Universitätsklinikum des Saarlandes, defects in EC coupling that occur in heart failure disrupt SR-mitochondrial Ca(2+) crosstalk and may cause energetic deficit and oxidative stress, both factors that are thought to be causally involved in the initiation and progression of the disease(16).
17. Calcium and blood clotting
In the study of corn-soybean meal diet fortified with minerals and vitamins (but not vitamin K) was fed to pigs, levels of Ca and P were achieved by adjusting the amounts of dicalcium phosphate and ground limestone in the diet by the University of Kentucky, showed that in blood clotting, Prothrombin and whole blood clotting times were increased (P less than .01) in pigs fed high Ca without vitamin K but were normal in pigs fed high Ca with added vitamin K. Similar trends in clotting times occurred in a second experiment. A third experiment was conducted to determine whether the addition of vitamin K could reverse the hemorrhagic condition induced by feeding high dietary Ca for 28 d(17).
18. Calcium in follicle-stimulating hormone signal transduction in Sertoli cells
Sertoli cells play a pivotal role in regulation and maintenance of spermatogenesis. Sertoli cells are hormonally regulated by follicle-stimulating hormone (FSH) acting upon a G-protein-linked cell surface FSH receptor. FSH increases intracellular cyclic AMP but the involvement of other signal transduction mechanisms including intracellular calcium in FSH action are not proven. In the study of freshly isolated rat Sertoli cells for the measurement of cytosolic free ionized calcium levels by dual-wavelength fluorescence spectrophotometry using the calcium-sensitive fluorescent dye Fura2-AM, showed that
cyclic AMP may mediate the FSH-induced rise in cytosolic calcium. The FSH-induced rise in cytosolic calcium required extracellular calcium and was abolished by calcium channel blockers specific for dihydropyridine (verapamil, nicardipine), nonvoltage-gated (ruthenium red) or all calcium channels (cobalt). Thus FSH action on Sertoli cells involves a specific, rapid, and sustained increase in cytosolic calcium which requires extracellular calcium and involves both dihydropyridine-sensitive, voltage-gated calcium channels and voltage-independent, receptor-gated calcium channels in the plasma membranes of rat Sertoli cells(18).
19. Long-term dialysis with low-calcium solution (1.0 mmol/L) in CAPD and hyperparathyroidism
In the prospective, randomized, controlled multicenter study to compare the effects of low-calcium (LCa, dialysate calcium 1.0 mmol/L) versus standard-calcium dialysate solution (SCa, dialysate calcium 1.75 mmol/L) on bone mineral metabolism in continuous ambulatory peritoneal dialysis (CAPD) patients over 2 years of treatment with Calcium carbonate (CaCO3) was given as oral phosphate binder to maintain serum phosphate < 2.0 mmol/L. If hypercalcemia supervened, CaCO3 was exchanged stepwise for aluminium hydroxide (Al(OH)3), until normocalcemia was obtained. Patients received calcitriol (0.25 microgram/day per os) if parathyroid hormone (PTH) exceeded the upper limit of normal by a factor of 2 or more, showed that In CAPD patients low-calcium dialysate solutions can be used successfully over prolonged periods of time with stable control of serum calcium. The risk of hypercalcemia resulting from calcium-containing phosphate binders and the need to use aluminum-containing phosphate binders is markedly diminished. However, there is a certain risk that severe secondary hyperparathyroidism with long-term LCa therapy will develop, even if normocalcemia is maintained(19).
20. Calcium absorption and hemodialysis
In the study of paired calcium absorption tests done before and after 12-13 weeks of 20,000 IU weekly cholecalciferol supplementation in 30 participants with stage 5 CKD on hemodialysis, calcium absorption was tested with a standardized meal containing 300 mg calcium carbonate intrinsically labeled with (45)Ca; 25-hydroxyvitamin D and 1,25-dihydroxyvitamin D were measured. found that patients with stage 5 CKD on hemodialysis had very low calcium absorption values at baseline, and cholecalciferol supplementation that raised 25(OH)D levels to 50 ng/ml had no effect on calcium absorption(20).
21. Calcium and Vitamin D intake of smokers
In the study conducted by the Geneva University Hospital, Geneva, Switzerland.to determine differences in dietary calcium and vitamin D intakes between female never, former and current smokers of a total of 2319 women resident in Geneva, Switzerland between 1993 and 1997, showed that Female current smokers have lower dietary intakes of calcium and vitamin D than never smokers(21).
22. Calcium and vitamin D nutrition and bone disease of the elderly
Osteoporosis, a systemic skeletal disease characterized by a low bone mass, is a major public health problem in EC member states because of the high incidence of fragility fractures, especially hip and vertebral fracture. According to the study by, The two nutrients essential for bone health are calcium and vitamin D. Reduced supplies of calcium are associated with a reduced bone mass and osteoporosis, whereas a chronic and severe vitamin D deficiency leads to osteomalacia, a metabolic bone disease characterized by a decreased mineralization of bone. Vitamin D insufficiency, the preclinical phase of vitamin D deficiency, is most commonly found in the elderly. The major causes of vitamin D deficiency and insufficiency are decreased renal hydroxylation of vitamin D, poor nutrition, scarce exposition to sunlight and a decline in the synthesis of vitamin D in the skin(22).
23. Calcium deficiency reduces circulating levels of FGF23
Fibroblast growth factor (FGF)-23 is probably the most important regulator of serum phosphate and calcitriol (1,25(OH)2D3) levels. Fibroblast growth factor (FGF) 23 inhibits calcitriol production, which could exacerbate calcium deficiency or hypocalcemia unless calcium itself modulates FGF23 in this setting. According to the stduy by the IMIBIC, Hospital Universitario Reina Sofia, indicated that In parathyroidectomized rats, an increase in dietary calcium for 10 days increased serum calcium, with an associated increase in FGF23, decrease in calcitriol, and no change in phosphorus. Also in parathyroidectomized rats, FGF23 increased significantly 6 hours after administration of calcium gluconate. Taken together, these results suggest that hypocalcemia reduces the circulating concentrations of FGF23(23).
24. Calcium in pregnancy.
Significant transplacental calcium transfer occurs during pregnancy, especially during the last trimester, to meet the demands of the rapidly mineralizing fetal skeleton. Similarly, there is an obligate loss of calcium in the breast milk during lactation. Both these result in considerable stress on the bone mineral homeostasis in the mother. According to the study by Dr. E. V. Kalyani Medical Centre, during pregnancy, increased intestinal absorption of calcium from the gut mainly due to higher generation of calcitriol (1,25 dihydroxy vitamin D) helps in maintaining maternal calcium levels. On the other hand, during lactation, the main compensatory mechanism is skeletal resorption due to increased generation of parathormone related peptide (PTHrP) from the breast. Previous studies suggest that in spite of considerable changes in bone mineral metabolism during pregnancy, parity and lactation are not significantly associated with future risk for osteoporosis(24).
25. Calcium & vitamin D supplementation in women with PCOS
In the study to evaluate the efficacy of calcium & vitamin D supplementation in infertile women suffering from polycystic ovary syndrome (PCOS), and to assess levels of 25-hydroxy vitamin D in these patients, showed that the positive effects of calcium & vitamin D supplementation on weight loss, follicle maturation, menstrual regularity, and improvement of hyperandrogenism, in infertile women(25).
26. Calcium-vitamin D and metformin on polycystic ovary syndrome
In thye study to to evaluate the effects of calcium-vitamin D and metformin on the menstrual cycle and ovulation in patients with polycystic ovary syndrome (PCOS), in atotal of 60 infertile PCOS patients were enrolled in a randomized clinical trial and divided into three equal groups. Group 1 received 1,000 mg of calcium and 400 IU of vitamin D per day, orally. Group 2 received the same as Group 1, plus 1,500 mg/day of metformin. Group 3 received 1,500 mg/day of metformin. The patients were treated for 3 months and followed up for a further 3 months, showed that the effects of metformin and calcium-vitamin D in regulating the menstrual cycle suggest that they could also be effective for the treatment of anovulation and oligomenorrhea, with possible consequences for pregnancy rates in PCOS patients(26).
27. Calcium metabolism & hypercalcemia in adults
Calcium is essential for many metabolic process, including nerve function, muscle contraction, and blood clotting. According to the study by University of Padua, School of Medicine, Calcium metabolism mainly depends on the activity of parathyroid hormone (PTH). Its secretion is strictly controlled by the ionized serum calcium levels through a negative feed-back, which is achieved by the activation of calcium-sensing receptors (CaSRs) mainly expressed on the surface of the parathyroid cells. The PTH receptor in bone and kidney is now referred as PTHR1. The balance of PTH, calcitonin, and vitamin D has long been considered the main regulator of calcium metabolism, Uncontrolled hypercalcemia may cause renal impairment, both temporary (alteration of renal tubular function) and progressive (relapsing nephrolithiasis), leading to a progressive loss of renal function, as well as severe bone diseases, and heart damages. Advances in the understanding of all actors of calcium homeostasis will be crucial, having several practical consequences in the treatment and prevention of hypercalcemia(27).
28. Calcium and prostate cancer
A high calcium intake, mainly from dairy products, may increase prostate cancer risk by lowering concentrations of 1,25-dihydroxyvitamin D(3) [1,25(OH)(2)D(3)], a hormone thought to protect against prostate cancer.According to the study by the Harvard School of Public Health, men who consumed >600 mg Ca/d from skim milk had lower plasma 1,25(OH)(2)D(3) concentrations than did those consuming < or =150 mg Ca/d [71 compared with 85 pmol/L (30.06 compared with 35.64 pg/mL); P = 0.005]. Compared with men consuming < or =0.5 daily servings of dairy products, those consuming >2.5 servings had a multivariate relative risk of prostate cancer of 1.34 (95% CI: 1.04, 1.71) after adjustment for baseline age, body mass index, smoking, exercise, and randomized treatment assignment in the original placebo-controlled trial. Compared with men consuming < or =150 mg Ca/d from dairy products, men consuming >600 mg/d had a 32% higher risk of prostate cancer (95% CI: 1.08, 1.63)(28).
29. calcium and vitamin D and Colon cancer
In the study to investigate whether a high intake of calcium, vitamin D, or dairy products may protect against colon cancer, the authors analyzed data from a prospective cohort study of 35,216 Iowa women aged 55-69 years without a history of cancer who completed a dietary questionnaire in 1986, by the showed that adjusted for age, intakes of calcium and vitamin D were significantly inversely associated with the risk of colon cancer(29).
30. Calcium protect against ischemic heart disease
In the study to investigate whether greater intakes of calcium, vitamin D, or milk products may protect against ischemic heart disease mortality, the authors analyzed data from a prospective cohort study of 34,486 postmenopausal Iowa women 55-69 years old and without a history of ischemic heart disease who completed a dietary questionnaire in 1986, showed that a higher intake of calcium, but not of vitamin D or milk products, is associated with reduced ischemic heart disease mortality in postmenopausal women, and reduced risk may be achievable whether the higher intake of calcium is attained by diet, supplements, or both(30).
31. Long term intake of dietary and supplemental calcium and cardiovascular disease
In the study to investigate the association between long term intake of dietary and supplemental calcium and death from all causes and cardiovascular disease, by the Section of Orthopedics, Uppsala University,showed that High intakes of calcium in women are associated with higher death rates from all causes and cardiovascular disease but not from stroke(31).
32. Health risks and benefits from calcium and vitamin D supplementation
In the study to examines the health benefits and risks of calcium and vitamin D supplementation using WHI data, with emphasis on fractures, cardiovascular disease, cancer, and total mortality by the Fred Hutchinson Cancer Research Center, Seattle, indicated that among women not taking personal calcium or vitamin D supplements at baseline, the hazard ratio [HR] for hip fracture occurrence in the CT following 5 or more years of calcium and vitamin D supplementation versus placebo was 0.62 (95 % confidence interval (CI), 0.38-1.00). In combined analyses of CT and OS data, the corresponding HR was 0.65 (95 % CI, 0.44-0.98). Supplementation effects were not apparent on the risks of myocardial infarction, coronary heart disease, total heart disease, stroke, overall cardiovascular disease, colorectal cancer, or total mortality, while evidence for a reduction in breast cancer risk and total invasive cancer risk among calcium plus vitamin D users was only suggestive(32).
33. Supplemental calcium and colorectal neoplasia
In the study to investigate whether supplemental oral calcium has a suppressant effect on colonic mucosal ornithine decarboxylase (ODC) and tyrosine kinase activities in patients with adenomatous polyps or a history of adenomatous polyps and whether this is affected by age, found that there is an age-related increase in basal rectal mucosal ODC activity in patients with adenomatous polyps which can be suppressed with calcium supplementation p.o., suggesting a role for dietary calcium in the chemoprevention of colorectal neoplasia(33).
34. Calcium and recurrent colorectal adenomas
In a randomized, double-blind trial of the effect of supplementation with calcium carbonate on the recurrence of colorectal adenomas of 930 subjects (mean age, 61 years; 72 percent men) with a recent history of colorectal adenomas to receive either calcium carbonate (3 g [1200 mg of elemental calcium] daily) or placebo, with follow-up colonoscopies one and four years after the qualifying examinationby the New England Journal of medicine, found that Calcium supplementation is associated with a significant — though moderate — reduction in the risk of recurrent colorectal adenomas(34).
35. Intake of calcium and vitamin D and breast cancer
In the study to evaluate the total calcium and vitamin D intake in relation to breast cancer incidence among 10 578 premenopausal and 20 909 postmenopausal women 45 years or older who were free of cancer and cardiovascular disease at baseline in the Women's Health Study, showed that t higher intakes of calcium and vitamin D may be associated with a lower risk of developing premenopausal breast cancer. The likely apparent protection in premenopausal women may be more pronounced for more aggressive breast tumors(35).
36. Intravenous calcium and hyperkalemia
Digoxin is an inhibitor of the sodium-potassium ATPase. In overdose, hyperkalemia is common. In the review of the charts of all adult patients diagnosed with digoxin toxicity in a large teaching hospital over 17.5 years with the main outcome measures were frequency of life-threatening dysrhythmia within 1 h of calcium administration, and mortality rate in patients who did vs. patients who did not receive intravenous calcium, showed that among digoxin-intoxicated humans, intravenous calcium does not seem to cause malignant dysrhythmias or increase mortality. We found no support for the historical belief that calcium administration is contraindicated in digoxin-toxic patients(36).
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(1) http://www.ncbi.nlm.nih.gov/pubmed/22106784
(2) http://www.ncbi.nlm.nih.gov/pubmed/18088161
(3) http://www.ncbi.nlm.nih.gov/pubmed/21967159
(4) http://www.ncbi.nlm.nih.gov/pubmed/15741380
(5) http://www.ncbi.nlm.nih.gov/pubmed/23329464
(6) http://www.ncbi.nlm.nih.gov/pubmed/21796340
(7) http://www.ncbi.nlm.nih.gov/pubmed/15821159
(8) http://www.ncbi.nlm.nih.gov/pubmed/23351007
(9) http://www.ncbi.nlm.nih.gov/pubmed/22330830
(10) http://www.ncbi.nlm.nih.gov/pubmed/8448655
(11) http://www.ncbi.nlm.nih.gov/pubmed/7997060
(12) http://www.ncbi.nlm.nih.gov/pubmed/21547225
(13) http://www.ncbi.nlm.nih.gov/pubmed/23423545
(14) http://www.ncbi.nlm.nih.gov/pubmed/23408969
(15) http://www.ncbi.nlm.nih.gov/pubmed/8062958
(16) http://www.ncbi.nlm.nih.gov/pubmed/23417042
(17) http://www.ncbi.nlm.nih.gov/pubmed/2016194
(18) http://www.ncbi.nlm.nih.gov/pubmed/1748649
(19) http://www.ncbi.nlm.nih.gov/pubmed/8761540
(20) http://www.ncbi.nlm.nih.gov/pubmed/23411428
(21) http://www.ncbi.nlm.nih.gov/pubmed/11002379
(22) http://www.ncbi.nlm.nih.gov/pubmed/11683549
(23) http://www.ncbi.nlm.nih.gov/pubmed/22581996
(24) http://www.ncbi.nlm.nih.gov/pubmed/22629499
(25) http://www.ncbi.nlm.nih.gov/pubmed/22500844
(26) http://www.ncbi.nlm.nih.gov/pubmed/19574176
(27) http://www.ncbi.nlm.nih.gov/pubmed/21756230
(28) http://www.ncbi.nlm.nih.gov/pubmed/11566656
(29) http://www.ncbi.nlm.nih.gov/pubmed/8333412
(30) http://www.ncbi.nlm.nih.gov/pubmed/9921960
(31) http://www.ncbi.nlm.nih.gov/pubmed/23403980
(32) http://www.ncbi.nlm.nih.gov/pubmed/23208074
(33) http://www.ncbi.nlm.nih.gov/pubmed/1711410
(34) http://www.nejm.org/doi/full/10.1056/NEJM199901143400204
(35) http://archinte.jamanetwork.com/article.aspx?articleid=486844
(36) http://www.ncbi.nlm.nih.gov/pubmed/19201134
1. Osteoporosis: vitamin D and calcium
Osteoporosis is a bone disease that predisposes to fractures. Sufficient intake of calcium and vitamin D is recommended for prevention and treatment. According to the study of 28,406 respondents aged 50 or older to the 2009 Canadian Community Health Survey (CCHS)--Healthy Aging, found that
In 2009, 19.2% of women and 3.4% of men aged 50 or older reported having been diagnosed with osteoporosis; the 2004 rates were similar. Age, sex and household income were associated with the probability of reporting osteoporosis. In 2004, based on dietary and supplement intake, 45% to 69% of the population aged 50 or older had inadequate intake of calcium, and 54% to 66% had inadequate intake of vitamin D(1).
2. Vitamin D3, calcium and reduced risk of fractures and falls
According to the study by the research team of Dr. Cranney A, in most trials, the effects of vitamin D and calcium could not be separated. Vitamin D(3) (>700 IU/day) with calcium supplementation compared to placebo has a small beneficial effect on BMD, and reduces the risk of fractures and falls although benefit may be confined to specific subgroups. Vitamin D intake above current dietary reference intakes was not reported to be associated with an increased risk of adverse events. However, most trials of higher doses of vitamin D were not adequately designed to assess long-term harms(2).
3. Vitamin D, calcium and the importance of other vitamins
Osteoporosis is a major health disorder associated with an increased risk of fracture. Nutrition is among the modifiable factors that influence the risk of osteoporosis and fracture. Calcium and vitamin D play important roles in improving bone mineral density and reducing the risk of fracture. According to the study by American University of Beirut, deficiencies in vitamins C, E, and K are also associated with compromised bone health; this effect may be modified by smoking, estrogen use or hormonal therapy after menopause, calcium intake, and vitamin D(3).
4. Calcium, dairy products, and bone health in children and young adults
In the review of Medline (National Library of Medicine, Bethesda, MD) search conducted for studies published on the relationship between milk, dairy products, or calcium intake and bone mineralization or fracture risk in children and young adults (1-25 years) yielded 58 studies: 22 cross-sectional studies; 13 retrospective studies; 10 longitudinal prospective studies; and 13 randomized, controlled trials found to ne supported of nutrition guidelines focused specifically on increasing milk or other dairy product intake for promoting child and adolescent bone mineralization(4).
5. The dosage of calcium and life style risks
According to the study by Aarhus University, secondary hyperparathyroidism caused by calcium and vitamin D insufficiency may reduce bone mass and strength and increase fracture risk and should be avoided. Since calcium supplementation has been associated with an increased risk of cardiovascular complications and renal stones, the dose should be tailored to the habitual daily calcium intake. Lifestyle-related risk factors (smoking, alcohol consumption, lack of physical activity and low body weight) should be addressed. The antifracture efficacy of antiresorptive and anabolic treatment for osteoporosis has not been documented in larger randomized controlled studies(5).
6. Calcium and Physiology and cell biology of acupuncture
In the article presenting a novel model of acupuncture physiology based on cellular calcium activation by an acoustic shear wave (ASW) generated by the mechanical movement of the needle with an acupuncture needle was driven by a piezoelectric transducer at 100 Hz or below, showed that the cell level, the ASW activated intracellular Ca(2+) transients and oscillations in fibroblasts and endothelial, ventricular myocytes and neuronal PC-12 cells along with frequency-amplitude tuning and memory capabilities. In contrast with traditional acupuncture models, the signal source is derived from the total acoustic energy. ASW signaling makes use of the anisotropy of elasticity of tissues as its waveguides for transmission and that cell activation is not based on the nervous system(6).
7. Calcium and cell physiology
According to the study by the University of Florida, in excitable cells, the coordination of changing Ca(2+) concentrations at global (cellular) and well-defined subcellular spaces through the course of membrane depolarization can now be conceptualized in the context of disease processes such as cardiac arrhythmogenesis. The spatial and temporal dimensions of Ca(2+) signaling are similarly important in non-excitable cells, such as endothelial and epithelial cells, to regulate multiple signaling pathways that participate in organ homeostasis as well as cellular organization and essential secretory processes(7).
8. Calcium and S100 proteins
S100 proteins play a crucial role in multiple important biological processes in vertebrate organisms acting predominantly as calcium signal transmitters.According to the study by the Polish Academy of Sciences, after four Ca(2+) ions bind, it undergoes a dramatic conformational change, resulting in exposure, in each of its two identical subunits, a large hydrophobic cleft that binds to target proteins. It has been shown that abnormal expression of S100A1 is strongly correlated with a number of severe human diseases: cardiomyopathy and neurodegenerative disorders(8).
9. Calcium and aluminum salt
Most humans living in industrialized societies are routinely exposed to bioavailable aluminum salts in the form of additives-in commercially-prepared foods, alum-clarified drinking water, certain pharmaceuticals, sunscreens, and other topical applications. Minute amounts of this aluminum are absorbed into the circulation. Trace aluminum levels cross the blood-brain barrier and progressively accumulate in large pyramidal neurons of the hippocampus, cortex, and other brain regions vulnerable in Alzheimer's disease. According to the study by the St George Hospital Campus, intraneuronal aluminum interferes with Ca2+ metabolism in the aged brain and describes a way to test this hypothesis. This paper reviews: 1) major changes that occur in brain Ca2+ homeostasis and Ca2+ signaling, subtly with aging and more overtly in Alzheimer's disease; and 2) evidence from the scientific literature that aluminum causes these same changes in neurons(9).
10. calcium and aluminum in Neurodegenerative disorders
Both calcium and aluminum have been implicated in the cell damage and death that occurs in several neurodegenerative disorders including Alzheimer's disease (AD). In the study to examine the effects of experimentally elevated intraneuronal levels of aluminum ([Al]i) and/or calcium ([Ca2+]i) on neuronal degeneration and antigenic alterations in the microtubule-associated protein tau in cell cultures of rat hippocampus and human cerebral cortex, showed that Exposure of cultures to Al3+ alone (200 microM) for up to 6 d did not result in neuronal degeneration. Neurons exposed to the divalent cation ionophore A23187 degenerated within 4 h when Ca2+ was present in the culture medium whether or not Al3+ was present. Measurements of [Ca2+]i using the calcium indicator dye fura-2 demonstrated a direct relationship between increased [Ca2+]i and neuronal degeneration. In contrast, neurons did not degenerate when exposed to A23187 in the presence of Al3+ and the absence of Ca2+, despite a 10-fold elevation in [Al]i as measured by laser microprobe mass spectrometry. Calcium influx, but not aluminum influx, elicited antigenic changes in tau similar to those seen in AD neurofibrillary tangles. Neurons exposed to glutamate in the presence of Al3+ but in the absence of Ca2+ were not vulnerable to injury. Finally, increased [Al]i occurred in neurons that degenerated as the result of exposure to glutamate indicating that aluminum associates with degenerating neurons(10).
11. Neuronal calcium homeostasis in the aging nervous system
Maintenance of the cellular calcium homeostasis plays an important role for neuronal cell function and interneuronal cell to cell communication. Therefore, alterations of the neuronal Ca2+ homeostasis may play a crucial role for brain aging in general and for age-related deficits in cognitive functions particularly.
Numerous studies indicate various disturbances of the Ca2+ homeostasis on different levels like Ca2+ channel properties, 45Ca2+ uptake, or Ca2+ binding proteins. Investigations on alterations of the free intracellular calcium concentration ([Ca2+]i) in presynaptic synaptosomal preparations led to inconsistent results reporting increased or unchanged [Ca2+]i in aged animals, according to the Central Institute of Mental Health, Dept. Psychopharmacology(11).
12. Disruption of calcium homeostasis and Alzheimer's disease (AD)
Oligomerization, conformational changes, and the consequent neurodegeneration of Alzheimer's β-amyloid protein (AβP) play crucial roles in the pathogenesis of Alzheimer's disease (AD). Mounting evidence suggests that oligomeric AβPs cause the disruption of calcium homeostasis, eventually leading to neuronal death, according to the School of Pharmaceutical Sciences, Kyushu University of Health and Welfare(12).
13. BK Channels in Cardiovascular Diseases and Aging
Aging is a major risk factor for cardiovascular diseases, one of the main world-wide causes of death. Several structural and functional changes occur in the cardiovascular system during the aging process and the mechanisms. BK channels are transmembrane proteins that play a key role in many physiological processes, including regulation of vascular tone.In vascular smooth muscle cells, BK opening and the consequent efflux of potassium (K(+)) leads to membrane hyperpolarization, which is followed by the closure of voltage-dependent Ca(2+) channels, reduction of Ca(2+) entry and vasodilatation. BK regulates nitric oxide-mediated vasodilatation and thus is crucial for normal endothelial function(13).
14. Ca(2+) waves regulate blood vessel tone and vasomotion
Agonist-stimulated smooth muscle Ca(2+) waves regulate blood vessel tone and vasomotion.The Pharmacology, and Therapeutics, University of British Columbia, present a first report of endothelin-1 stimulated waves of Ca(2+) depletion from the sarcoplasmic reticulum of vascular smooth muscle cells using a calsequestrin-targeted Ca(2+) indicator and confirmed that these waves are due to regenerative Ca(2+)-induced Ca(2+) release by the receptors for inositol 1,4,5-trisphosphate(14).
15. Calcium ion channel blockers on sperm fertilization
In the stduy to evaluate the effects of calcium ion (Ca2+) channel blockers on male fertility potential, showed that therapeutic administrations of calcium antagonists for hypertension control cause reversible male infertility associated with an IVF failure. A mechanism of inhibition of sperm fertilizing potential through insertion of lipophilic calcium ion antagonists into the lipid bilayer of the sperm plasma membrane is consistent with our in vitro studies(15).
16. Ca(2+)and enzymes
The processes of excitation-contraction (EC) coupling consume large amounts of energy that need to be replenished by oxidative phosphorylation in mitochondria. Since Ca(2+) activates key enzymes of the Krebs cycle in the mitochondrial matrix, it is important to understand the mechanisms and kinetics of mitochondrial Ca(2+) uptake to delineate how in cardiac myocytes, energy supply is efficiently matched to demand. According to the study by Universitätsklinikum des Saarlandes, defects in EC coupling that occur in heart failure disrupt SR-mitochondrial Ca(2+) crosstalk and may cause energetic deficit and oxidative stress, both factors that are thought to be causally involved in the initiation and progression of the disease(16).
17. Calcium and blood clotting
In the study of corn-soybean meal diet fortified with minerals and vitamins (but not vitamin K) was fed to pigs, levels of Ca and P were achieved by adjusting the amounts of dicalcium phosphate and ground limestone in the diet by the University of Kentucky, showed that in blood clotting, Prothrombin and whole blood clotting times were increased (P less than .01) in pigs fed high Ca without vitamin K but were normal in pigs fed high Ca with added vitamin K. Similar trends in clotting times occurred in a second experiment. A third experiment was conducted to determine whether the addition of vitamin K could reverse the hemorrhagic condition induced by feeding high dietary Ca for 28 d(17).
18. Calcium in follicle-stimulating hormone signal transduction in Sertoli cells
Sertoli cells play a pivotal role in regulation and maintenance of spermatogenesis. Sertoli cells are hormonally regulated by follicle-stimulating hormone (FSH) acting upon a G-protein-linked cell surface FSH receptor. FSH increases intracellular cyclic AMP but the involvement of other signal transduction mechanisms including intracellular calcium in FSH action are not proven. In the study of freshly isolated rat Sertoli cells for the measurement of cytosolic free ionized calcium levels by dual-wavelength fluorescence spectrophotometry using the calcium-sensitive fluorescent dye Fura2-AM, showed that
cyclic AMP may mediate the FSH-induced rise in cytosolic calcium. The FSH-induced rise in cytosolic calcium required extracellular calcium and was abolished by calcium channel blockers specific for dihydropyridine (verapamil, nicardipine), nonvoltage-gated (ruthenium red) or all calcium channels (cobalt). Thus FSH action on Sertoli cells involves a specific, rapid, and sustained increase in cytosolic calcium which requires extracellular calcium and involves both dihydropyridine-sensitive, voltage-gated calcium channels and voltage-independent, receptor-gated calcium channels in the plasma membranes of rat Sertoli cells(18).
19. Long-term dialysis with low-calcium solution (1.0 mmol/L) in CAPD and hyperparathyroidism
In the prospective, randomized, controlled multicenter study to compare the effects of low-calcium (LCa, dialysate calcium 1.0 mmol/L) versus standard-calcium dialysate solution (SCa, dialysate calcium 1.75 mmol/L) on bone mineral metabolism in continuous ambulatory peritoneal dialysis (CAPD) patients over 2 years of treatment with Calcium carbonate (CaCO3) was given as oral phosphate binder to maintain serum phosphate < 2.0 mmol/L. If hypercalcemia supervened, CaCO3 was exchanged stepwise for aluminium hydroxide (Al(OH)3), until normocalcemia was obtained. Patients received calcitriol (0.25 microgram/day per os) if parathyroid hormone (PTH) exceeded the upper limit of normal by a factor of 2 or more, showed that In CAPD patients low-calcium dialysate solutions can be used successfully over prolonged periods of time with stable control of serum calcium. The risk of hypercalcemia resulting from calcium-containing phosphate binders and the need to use aluminum-containing phosphate binders is markedly diminished. However, there is a certain risk that severe secondary hyperparathyroidism with long-term LCa therapy will develop, even if normocalcemia is maintained(19).
20. Calcium absorption and hemodialysis
In the study of paired calcium absorption tests done before and after 12-13 weeks of 20,000 IU weekly cholecalciferol supplementation in 30 participants with stage 5 CKD on hemodialysis, calcium absorption was tested with a standardized meal containing 300 mg calcium carbonate intrinsically labeled with (45)Ca; 25-hydroxyvitamin D and 1,25-dihydroxyvitamin D were measured. found that patients with stage 5 CKD on hemodialysis had very low calcium absorption values at baseline, and cholecalciferol supplementation that raised 25(OH)D levels to 50 ng/ml had no effect on calcium absorption(20).
21. Calcium and Vitamin D intake of smokers
In the study conducted by the Geneva University Hospital, Geneva, Switzerland.to determine differences in dietary calcium and vitamin D intakes between female never, former and current smokers of a total of 2319 women resident in Geneva, Switzerland between 1993 and 1997, showed that Female current smokers have lower dietary intakes of calcium and vitamin D than never smokers(21).
22. Calcium and vitamin D nutrition and bone disease of the elderly
Osteoporosis, a systemic skeletal disease characterized by a low bone mass, is a major public health problem in EC member states because of the high incidence of fragility fractures, especially hip and vertebral fracture. According to the study by, The two nutrients essential for bone health are calcium and vitamin D. Reduced supplies of calcium are associated with a reduced bone mass and osteoporosis, whereas a chronic and severe vitamin D deficiency leads to osteomalacia, a metabolic bone disease characterized by a decreased mineralization of bone. Vitamin D insufficiency, the preclinical phase of vitamin D deficiency, is most commonly found in the elderly. The major causes of vitamin D deficiency and insufficiency are decreased renal hydroxylation of vitamin D, poor nutrition, scarce exposition to sunlight and a decline in the synthesis of vitamin D in the skin(22).
23. Calcium deficiency reduces circulating levels of FGF23
Fibroblast growth factor (FGF)-23 is probably the most important regulator of serum phosphate and calcitriol (1,25(OH)2D3) levels. Fibroblast growth factor (FGF) 23 inhibits calcitriol production, which could exacerbate calcium deficiency or hypocalcemia unless calcium itself modulates FGF23 in this setting. According to the stduy by the IMIBIC, Hospital Universitario Reina Sofia, indicated that In parathyroidectomized rats, an increase in dietary calcium for 10 days increased serum calcium, with an associated increase in FGF23, decrease in calcitriol, and no change in phosphorus. Also in parathyroidectomized rats, FGF23 increased significantly 6 hours after administration of calcium gluconate. Taken together, these results suggest that hypocalcemia reduces the circulating concentrations of FGF23(23).
24. Calcium in pregnancy.
Significant transplacental calcium transfer occurs during pregnancy, especially during the last trimester, to meet the demands of the rapidly mineralizing fetal skeleton. Similarly, there is an obligate loss of calcium in the breast milk during lactation. Both these result in considerable stress on the bone mineral homeostasis in the mother. According to the study by Dr. E. V. Kalyani Medical Centre, during pregnancy, increased intestinal absorption of calcium from the gut mainly due to higher generation of calcitriol (1,25 dihydroxy vitamin D) helps in maintaining maternal calcium levels. On the other hand, during lactation, the main compensatory mechanism is skeletal resorption due to increased generation of parathormone related peptide (PTHrP) from the breast. Previous studies suggest that in spite of considerable changes in bone mineral metabolism during pregnancy, parity and lactation are not significantly associated with future risk for osteoporosis(24).
25. Calcium & vitamin D supplementation in women with PCOS
In the study to evaluate the efficacy of calcium & vitamin D supplementation in infertile women suffering from polycystic ovary syndrome (PCOS), and to assess levels of 25-hydroxy vitamin D in these patients, showed that the positive effects of calcium & vitamin D supplementation on weight loss, follicle maturation, menstrual regularity, and improvement of hyperandrogenism, in infertile women(25).
26. Calcium-vitamin D and metformin on polycystic ovary syndrome
In thye study to to evaluate the effects of calcium-vitamin D and metformin on the menstrual cycle and ovulation in patients with polycystic ovary syndrome (PCOS), in atotal of 60 infertile PCOS patients were enrolled in a randomized clinical trial and divided into three equal groups. Group 1 received 1,000 mg of calcium and 400 IU of vitamin D per day, orally. Group 2 received the same as Group 1, plus 1,500 mg/day of metformin. Group 3 received 1,500 mg/day of metformin. The patients were treated for 3 months and followed up for a further 3 months, showed that the effects of metformin and calcium-vitamin D in regulating the menstrual cycle suggest that they could also be effective for the treatment of anovulation and oligomenorrhea, with possible consequences for pregnancy rates in PCOS patients(26).
27. Calcium metabolism & hypercalcemia in adults
Calcium is essential for many metabolic process, including nerve function, muscle contraction, and blood clotting. According to the study by University of Padua, School of Medicine, Calcium metabolism mainly depends on the activity of parathyroid hormone (PTH). Its secretion is strictly controlled by the ionized serum calcium levels through a negative feed-back, which is achieved by the activation of calcium-sensing receptors (CaSRs) mainly expressed on the surface of the parathyroid cells. The PTH receptor in bone and kidney is now referred as PTHR1. The balance of PTH, calcitonin, and vitamin D has long been considered the main regulator of calcium metabolism, Uncontrolled hypercalcemia may cause renal impairment, both temporary (alteration of renal tubular function) and progressive (relapsing nephrolithiasis), leading to a progressive loss of renal function, as well as severe bone diseases, and heart damages. Advances in the understanding of all actors of calcium homeostasis will be crucial, having several practical consequences in the treatment and prevention of hypercalcemia(27).
28. Calcium and prostate cancer
A high calcium intake, mainly from dairy products, may increase prostate cancer risk by lowering concentrations of 1,25-dihydroxyvitamin D(3) [1,25(OH)(2)D(3)], a hormone thought to protect against prostate cancer.According to the study by the Harvard School of Public Health, men who consumed >600 mg Ca/d from skim milk had lower plasma 1,25(OH)(2)D(3) concentrations than did those consuming < or =150 mg Ca/d [71 compared with 85 pmol/L (30.06 compared with 35.64 pg/mL); P = 0.005]. Compared with men consuming < or =0.5 daily servings of dairy products, those consuming >2.5 servings had a multivariate relative risk of prostate cancer of 1.34 (95% CI: 1.04, 1.71) after adjustment for baseline age, body mass index, smoking, exercise, and randomized treatment assignment in the original placebo-controlled trial. Compared with men consuming < or =150 mg Ca/d from dairy products, men consuming >600 mg/d had a 32% higher risk of prostate cancer (95% CI: 1.08, 1.63)(28).
29. calcium and vitamin D and Colon cancer
In the study to investigate whether a high intake of calcium, vitamin D, or dairy products may protect against colon cancer, the authors analyzed data from a prospective cohort study of 35,216 Iowa women aged 55-69 years without a history of cancer who completed a dietary questionnaire in 1986, by the showed that adjusted for age, intakes of calcium and vitamin D were significantly inversely associated with the risk of colon cancer(29).
30. Calcium protect against ischemic heart disease
In the study to investigate whether greater intakes of calcium, vitamin D, or milk products may protect against ischemic heart disease mortality, the authors analyzed data from a prospective cohort study of 34,486 postmenopausal Iowa women 55-69 years old and without a history of ischemic heart disease who completed a dietary questionnaire in 1986, showed that a higher intake of calcium, but not of vitamin D or milk products, is associated with reduced ischemic heart disease mortality in postmenopausal women, and reduced risk may be achievable whether the higher intake of calcium is attained by diet, supplements, or both(30).
31. Long term intake of dietary and supplemental calcium and cardiovascular disease
In the study to investigate the association between long term intake of dietary and supplemental calcium and death from all causes and cardiovascular disease, by the Section of Orthopedics, Uppsala University,showed that High intakes of calcium in women are associated with higher death rates from all causes and cardiovascular disease but not from stroke(31).
32. Health risks and benefits from calcium and vitamin D supplementation
In the study to examines the health benefits and risks of calcium and vitamin D supplementation using WHI data, with emphasis on fractures, cardiovascular disease, cancer, and total mortality by the Fred Hutchinson Cancer Research Center, Seattle, indicated that among women not taking personal calcium or vitamin D supplements at baseline, the hazard ratio [HR] for hip fracture occurrence in the CT following 5 or more years of calcium and vitamin D supplementation versus placebo was 0.62 (95 % confidence interval (CI), 0.38-1.00). In combined analyses of CT and OS data, the corresponding HR was 0.65 (95 % CI, 0.44-0.98). Supplementation effects were not apparent on the risks of myocardial infarction, coronary heart disease, total heart disease, stroke, overall cardiovascular disease, colorectal cancer, or total mortality, while evidence for a reduction in breast cancer risk and total invasive cancer risk among calcium plus vitamin D users was only suggestive(32).
33. Supplemental calcium and colorectal neoplasia
In the study to investigate whether supplemental oral calcium has a suppressant effect on colonic mucosal ornithine decarboxylase (ODC) and tyrosine kinase activities in patients with adenomatous polyps or a history of adenomatous polyps and whether this is affected by age, found that there is an age-related increase in basal rectal mucosal ODC activity in patients with adenomatous polyps which can be suppressed with calcium supplementation p.o., suggesting a role for dietary calcium in the chemoprevention of colorectal neoplasia(33).
34. Calcium and recurrent colorectal adenomas
In a randomized, double-blind trial of the effect of supplementation with calcium carbonate on the recurrence of colorectal adenomas of 930 subjects (mean age, 61 years; 72 percent men) with a recent history of colorectal adenomas to receive either calcium carbonate (3 g [1200 mg of elemental calcium] daily) or placebo, with follow-up colonoscopies one and four years after the qualifying examinationby the New England Journal of medicine, found that Calcium supplementation is associated with a significant — though moderate — reduction in the risk of recurrent colorectal adenomas(34).
35. Intake of calcium and vitamin D and breast cancer
In the study to evaluate the total calcium and vitamin D intake in relation to breast cancer incidence among 10 578 premenopausal and 20 909 postmenopausal women 45 years or older who were free of cancer and cardiovascular disease at baseline in the Women's Health Study, showed that t higher intakes of calcium and vitamin D may be associated with a lower risk of developing premenopausal breast cancer. The likely apparent protection in premenopausal women may be more pronounced for more aggressive breast tumors(35).
36. Intravenous calcium and hyperkalemia
Digoxin is an inhibitor of the sodium-potassium ATPase. In overdose, hyperkalemia is common. In the review of the charts of all adult patients diagnosed with digoxin toxicity in a large teaching hospital over 17.5 years with the main outcome measures were frequency of life-threatening dysrhythmia within 1 h of calcium administration, and mortality rate in patients who did vs. patients who did not receive intravenous calcium, showed that among digoxin-intoxicated humans, intravenous calcium does not seem to cause malignant dysrhythmias or increase mortality. We found no support for the historical belief that calcium administration is contraindicated in digoxin-toxic patients(36).
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