Sunday, March 12, 2017

Hormone Prostaglandins E(2) and fever

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 Prostaglandins

Prostaglandins, are a group of lipid mediators, found and isolated from human semen in the 1930s by Ulf von Euler of Sweden, responsible for inflammation features, such as swelling, pain, stiffness, redness and warmth. The hormones are produced by almost all nucleated cells and synthesized in the cell from the essential fatty acids (EFAs), include prostacyclin I2 (PGI2), prostaglandin E2(PGE2), and prostaglandin F2α (PGF2α)

     Hormone Prostaglandins E(2) and fever


Systemic inflammation is accompanied by changes in body temperature, either fever or hypothermia. Rat and mouse have become the predominant animal models, and new species-specific tools (recombinant antibodies and other proteins) and genetic manipulations have been applied to study fever and hypothermia. According to the study by the St. Joseph's Hospital and Medical Center, an indispensable role of PGE2 in the febrile response to LPS has been demonstrated in studies with targeted disruption of genes encoding either PGE2-synthesizing enzymes or PGE2 receptors. The PGE2-synthesizing enzymes include numerous phospholipases (PL) A2, cyclooxygenases (COX)-1 and 2, and several newly discovered terminal PGE synthases (PGES). It has been realized that the "physiological," low-scale production of PGE2 and the accelerated synthesis of PGE2 in inflammation are catalyzed by different sets of these enzymes. The "inflammatory" set includes several isoforms of PLA2 and inducible isoforms of COX (COX-2) and microsomal (m) PGES (mPGES-1). The PGE2 receptors are multiple; one of them, EP3 is likely to be a primary "fever receptor." The effector pathways of fever start from EP3-bearing preoptic neurons. These neurons have been found to project to the raphe pallidus, where premotor sympathetic neurons driving thermogenesis in the brown fat and skin vaso-constriction are located(31).

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Sources
(31) http://www.ncbi.nlm.nih.gov/pubmed/15970487

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