Medical Advisor Journals

Wednesday, September 20, 2017

Hormone Histamine: Histamine and variant angina and acute coronary syndromes

Kyle J. Norton(Scholar and Master of Nutrients, all right reserved)
Health article writer and researcher; Over 10.000 articles and research papers have been written and published on line, including world wide health, ezine articles, article base, healthblogs, selfgrowth, best before it's news, the karate GB daily, etc.,.
Named TOP 50 MEDICAL ESSAYS FOR ARTISTS & AUTHORS TO READ by Disilgold.com Named 50 of the best health Tweeters Canada - Huffington Post
Nominated for shorty award over last 4 years
Some articles have been used as references in medical research, such as international journal Pharma and Bio science, ISSN 0975-6299.

Hormone Histamine

Histamine, found within granules of basophils and mast cells (>90% of body stores) is a biogenic amine and an organic nitrogen compound that occurs to various degrees in many foods such as cherries to about 0.17-13.46 ng/g, bananas and grapes, rice and cereals, herbs, olive oil, wine, beer, etc.. In healthy persons, dietary histamine can be rapidly detoxified by amine oxidases, whereas persons with low amine oxidase activity are at risk of histamine toxicity(a). the hormone, as a neurotransmitter is involved in regulating physiological function in the gut and immune response to foreign pathogens.

Histamine: Histamine and variant angina and acute coronary syndromes

Histamine can induce coronary vasospasm, leading to variant angina and acute myocardial infarction, according to the study by Cardiovascular Research, Physiology Institute, University of Zurich, histamine induces expression of TF, but not TF pathway inhibitor, in vascular cells via activation of the H1, but not H2, receptor. This effect is mediated by the MAP kinases p38, ERK, and JNK. This observation may open novel perspectives in the treatment of variant angina and acute coronary syndromes(14).

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Sources
(a) http://www.ncbi.nlm.nih.gov/pubmed/17490952
(14) http://www.ncbi.nlm.nih.gov/pubmed/16009787

Tuesday, September 19, 2017

Hormone Histamine: Histamine and smooth muscle cells

Histamine: Histamine and smooth muscle cells

Acoording to the study by The University of Tennessee, histamine markedly induces protein kinase D (PKD) activation in human aortic smooth muscle cells (HASMCs). PKD belongs to a family of serine/threonine protein kinases, and its function in vascular disease is largely unknown. Histamine-induced PKD phosphorylation is dependent on the activation of histamine receptor 1 (H1) and protein kinase C (PKC). PKD2 predominantly mediates histamine-induced TF expression via the p38 MAPK pathway, while PKD1 mediates histamine-induced TF expression through a p38 MAPK-independent pathway. PKD is a new component in histamine signaling in live cells and that PKD has a novel function in the histamine signaling pathway leading to gene expression, as evidenced by TF expression. Importantly, our data reveal a regulatory link from histamine to PKD and TF, providing new insights into the mechanisms of coagulation and the development of atherothrombosis(13).

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Monday, September 18, 2017

Hormone Histamine: Histamine and the effects on nasal mucous membrane

Histamine: Histamine and the effects on nasal mucous membrane

In the study to examine the reliability of suppression of the histamine wheal and flare reaction in the skin to predict an antihistamine's clinical efficacy in two common allergic diseases seasonal allergic rhinitis and chronic idiopathic urticaria, showed that although histamine is one mediator in the allergic response in the skin and nasal mucosa, many other agents are important modulators of the allergic response. In addition, the major structural and functional differences that exist between the nasal mucosa and the skin affect the type of local response. These manifest themselves as differences between the responses to antigen and histamine challenge in the skin and the nose. The allergic responses in these tissues are not simply the consequence of one chemical but are the result of a cascade of interactions among various cells and mediators. The clinical manifestations of these complex interactions obviously cannot be fully replicated by injection of one chemical mediator, histamine, into the outer layer of the skin. Studies with antihistamines have shown that certain drugs, such as cetirizine, are more suppressive than others (loratadine, terfenadine) in controlling the histamine-induced wheal and flare reaction in the skin. When the clinical efficacy of these medications is compared in clinical trials in seasonal allergic rhinitis and chronic idiopathic urticaria, all are equally efficacious in controlling symptoms(12).

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Saturday, September 16, 2017

Hormone Histamine: Histamine and eating behavior

Histamine: Histamine and eating behavior

Interest in the histaminergic system as a potential target for the treatment of feeding disorders is driven by the unsatisfactory history of the pharmacotherapy of obesity, researchers at the found that the appetitive phase requires a high and yet optimal arousal state, and the histaminergic system is crucial for sustaining a high degree of arousal during motivated behavior. Histamine H(1) receptors in the brain are crucial for the regulation of the diurnal rhythm of food intake and the regulationof obesity; however, from a therapeutic standpoint, no brain-penetrating H(1) receptor agonists have been identified that would have antiobesity effects. Despite conflicting preclinical data, insights are emerging into the potential role of histamineH(3) receptors as a target of antiobesity therapeutics(11)

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Hormone Histamine: Histamine and schizophrenia

Histamine: Histamine and schizophrenia

In a study of a strong hyperactivity of histamine neurons induced in rodent brain by administration of methamphetamine or NMDA-receptor antagonists, Dr. Arrang JM. at the Unité de Neurobiologie et Pharmacologie Moléculaire, found that H3-receptor antagonists/inverse agonists display antipsychotic-like properties in animal models of the disease. Because of the limited predictability value of most animal models and the paucity of drugs affecting histaminergic transmission that were tried so far in human, the evidence remains therefore largely indirect, but supports a role of histamine neurons in schizophrenia(10)
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Friday, September 15, 2017

Hormone Histamine: The role of histamine on cognition

Histamine: The role of histamine on cognition

The specific participation of histamine in cognitive functions followed a slow and unclear pathway because the many different experimental learning models, pharmacologic approaches, systemic and localized applications of the histamine active compounds into the brain used by researchers showed facilitating or inhibitory effects on learning, generating an active issue that has extended up to present time. The specific histamine receptors and the compartmentalizing proprieties of the brain that might explain the apparent inconsistent effects of the imidazolamine in learning. In addition, a hypothetical physiologic role for histamine in memory is proposed under the standard theories of learning in experimental animals and humans.according to the study of Dr. Edgardo O. Alvarez at the Universidad Nacional de Cuyo, Laboratorio de Neuropsicofarmacología Experimenta(9).

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Thursday, September 14, 2017

Hormone Histamine: Histamine and men sexual arousal

Histamine: Histamine and men sexual arousal

In the study to evaluate the course of histamine plasma levels through different stages of sexual arousal in the systemic and cavernous blood of healthy male subjects of 34 healthy men, researchers at the Department of Urology & Urological Oncology, Hannover Medical School, showed that histamine slightly decreased in the cavernous blood when the penis became tumescent. During rigidity, histaminedecreased further but remained unaltered in the phase of detumescence and after ejaculation. In the systemic circulation, no alterations were observed with the initiation or termination of penile erection, whereas a significant drop was registered following ejaculation. Results are not in favour of the hypothesis of an excitatory role of histamine in the control of penile erection. Nevertheless, the amine might mediate biological events during the post-ejaculatory period(8).

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