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Histamine

Histamine

(Science: biochemistry) formed by decarboxylation of histidine. Potent pharmacological agent acting through receptors in smooth muscle and in secretory systems.

stored in mast cells and released by antigen. (see hypersensitivity). Responsible for the early symptoms of anaphylaxis. Also present in some venoms. Amine formed from histidine that stimulates gastric secretions and dilates blood vessels; released by the humane immune system during allergic reactions.A chemical that is produced particularly by leucocytes that results in blood vessels becoming more permeable and in turn lose fluid to the tissues. This can result in localised swelling, and is a direct response to the presence of an [[antigen.


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Re: "Twenty questions"-biology game

ECLs are cells of the fundus of the stomach. They contain high amount of histamine and release it in order to activate the acid-producing parietal cells

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by joodi
Sat Mar 21, 2009 9:03 am
 
Forum: General Discussion
Topic: "Twenty questions"-biology game
Replies: 759
Views: 88711

Histidine

... urocanate is further processed into ammonia, glutamate and a 1-C fragment that it used in the folate coenzyme system. 3. Decarboxylation into histamine which is found predominately in mast cells and plays important roles in immune function and as a paracrine agent acting on the stomach. 4.?? ...

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by jmyhre
Thu Jan 22, 2009 6:10 pm
 
Forum: Physiology
Topic: Histidine
Replies: 0
Views: 827

Re: Stomach bloating and weight gain

... corticosteroid medications that function in blocking the pro-inflammatory chemical mediators in the body including the compounds such as histamine, some of the prostaglandins and the compounds called leukotrienes. Scientists believe that these compounds are responsible for the pain, the ...

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by Jennuan
Wed Oct 29, 2008 4:21 am
 
Forum: Physiology
Topic: Stomach bloating and weight gain
Replies: 299
Views: 483322

Could water really have a memory?

... evidence at all to say that there is any difference between the solution that started off as pure water and the solution that started off with the histamine (an allergen)." Benveniste gradually moved out of academia as a result of the [i]Nature debacle,[/i] but right up to his death in 2004, ...

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by abbassido
Wed Aug 06, 2008 4:15 am
 
Forum: General Discussion
Topic: Could water really have a memory?
Replies: 3
Views: 623

Allergy questions

... and it is somehow stable enough to withstand all other digestive means. If it goes into your bloodstream and interacts with mast cells to produce histamine, you'll have your reaction. Antibodies may be produced to neutralize it. You might have some macrophages eat it or whatever. But I don't think ...

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by mith
Fri Nov 30, 2007 11:29 pm
 
Forum: Human Biology
Topic: Allergy questions
Replies: 18
Views: 2365
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