Medical Advisor Journals

Saturday, September 16, 2017

Hormone Histamine: Histamine and eating behavior

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.,.
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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 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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Sources
(a) http://www.ncbi.nlm.nih.gov/pubmed/17490952
(11) http://www.ncbi.nlm.nih.gov/pubmed/20864503

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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Wednesday, September 13, 2017

Hormone Histamine: Histamine and neuropsychiatric disorders

Histamine: Histamine and neuropsychiatric disorders

Brain histamine is involved in a wide range of physiological functions such as regulation of sleep-wake cycle, arousal, appetite control, cognition, learning and memory mainly through the 4 receptor subtypes: H1, H2, H3 and H4, according to the study of Dr. Tashiro M, and Dr. Yanai K. at the Tohoku University Cyclotron and Radioisotope Centre, a series of clinical studies on histamine H1 antagonists, or antihistamines, have demonstrated that antihistamines can be classified into sedative, mildly-sedative and non-sedative drugs according to their blood-brain barrier (BBB) permeability, showing apparent clinical usefulness regarding QOL, work efficiency and traffic safety of allergic patients. PET has also been used for elucidation of aging effects and pathophysiological roles of histaminergic nervous system in various neuropsychiatric disorders such as Alzheimer's disease, schizophrenia and depression, where H1 receptor binding potentials were lower than age-matched healthy controls. It has been also demonstrated that brain histamine functions as an endogenous anti-epileptic. In addition, H3 receptors are located in the presynaptic sites of not only histaminergic nerves but also in other nervous systems such as serotonergic, cholinergic and dopaminergic systems, and to be regulating secretion of various neurotransmitters. Nowadays, H3 receptors have been thought to be a new target of drug treatment of various neuropsychiatric disorders(7).

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Tuesday, September 12, 2017

Hormone Histamine: Histamine H3 receptors and sleep-wake regulation

Histamine: Histamine H3 receptors and sleep-wake regulation

The histamine H(3) receptors are autoreceptors damping histamine synthesis, the firing frequency of histamine neurons, and the release of histamine from axonal varicosities. It is noteworthy that this action also extends to heteroreceptors on the axons of most other neurotransmitter systems, allowing a powerful control over multiple homeostatic functions. The particular properties and locations of histamineH(3) receptors provide quite favorable attributes to make this a most promising target for pharmacological interventions of sleep and waking disorders associated with narcolepsy, Parkinson's disease, and other neuropsychiatric indications, according to the study of Integrative Physiology of Brain Arousal Systems, Claude Bernard University(6).

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Monday, September 11, 2017

Hormone Histamine: Atopic Dermatitis with a Low-histamine Diet

Histamine: Atopic Dermatitis with a Low-histamine Diet

In a study to evaluate a six-year-old Korean boy with AD admitted to the hospital for evaluation of the possibility of food, particularly pork, as a triggering factor in his skin disease, found that in an oral food challenge test, he showed a positive result after eating 200 g of pork, but did not show a positive result after eating 60 g of pork. After discharge, we attempted to keep him on a balanced diet that included various types of food and prohibited him from eating food that contains a high level of histamine. After keeping the patient on a balanced and low-histamine dietary regimen, his AD symptoms showed improvement and have not worsened for more than seven months. A low-histamine, balanced diet could be helpful for AD patients having symptoms that resemble histamine intolerance in which their AD symptoms worsened after intake of histamine-rich foods, but in which food allergy tests are negative(5).

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