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.
is a product of the amino acid, histidene and is released by damaged cells. Histamine causes an increase in capillary permeability and vasodilation, two vascular events which are the first stages of inflammation. Histamine is also a neurotransmitters substance, released at nerve synapses mostly in the hypothalamus.
Found on http://www.eclipse.co.uk/moordent/page5.html
- amine formed from histidine that stimulates gastric secretions and dilates blood vesselsFound on http://www.webdictionary.co.uk/definition.php?query=histamine
A physiologically active depressor amine found in plant and animal tissue, derived from histidine (found in fruits such as bananas and grapes, meat and poultry, and milk and milk products. It is also found in root vegetables and all green vegetables, though in lesser quantities).by decarboxylation (the process of removing a carboxyl group from a ch...Found on http://thewellnessshop.co.uk/healthandwellbeing/glossary.html
A chemical released via the body's immune system in response to allergensFound on http://www.encyclo.co.uk/local/20575
One of the chemical substances involved in the inflammatory reaction and which is responsible for certain allergic symptoms.
Found on http://www.zirtek.co.uk/allergies.php
2-(1H-imidazol-4-yl)ethan-1-amine, an amine derived from histidine by decarboxylation and released from cells in the immune system as part of an allergic reaction: it is a powerful stimulant of gastric secretion, constrictor of bronchial smooth muscle, and vasodilator.Found on http://sis.nlm.nih.gov/enviro/iupacglossary/glossaryh.html
a chemical in some cells of the body that is released during allergic reactions, causing inflammation; also causes production of acid in the stomach and narrowing of the airways Found on http://www.medichecks.com/glossary.cfm?ltr=H
A naturally occurring substance, which is released in inflammatory processes, and allergic reactions
Found on http://www.dwp.gov.uk/medical/med_conditions/glossary.html
The defense substance responsible for most inflammation.
Found on http://www.swsbm.com/ManualsMM/MedHerbGloss2.txt
A type of amine
Found on http://www.gadsbywicks.co.uk/uploaded/3822.pdf
Histamine: Substance that plays a major role in many allergic reactions. Histamine dilates blood vessels and makes the vessel walls abnormally permeable.Found on http://www.medterms.com/script/main/art.asp?articlekey=3765
<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. ... (18 Nov 1997) ... Found on http://www.mondofacto.com/facts/dictionary?histamine
amine formed from histidine that stimulates gastric secretions and dilates blood vessels; released by the human immune system during allergic reactionsFound on http://wordnetweb.princeton.edu/perl/webwn?s=histamine
(his´tә-mēn) an amine, C5H9N3 found in all body tissues, produced by decarboxylation of histidine. It induces numerous physiological changes in the body: capillary dilation, which increases capillary permeability and lowers blood pressure; contraction of most smooth muscle tissue; increased secretion of gastr...Found on http://www.encyclo.co.uk/local/21001
biologically active substance found in a great variety of living organisms. It is distributed widely, albeit unevenly, throughout the animal kingdom ... [13 related articles]Found on http://www.britannica.com/eb/a-z/h/54
histamine 1. An amine (chemical compound containing nitrogen, derived from ammonia) formed from the amino acid histidine (one of the 20 building blocks of protein) by decarboxylation (removal of the carboxyl [univalent radical characteristic of all organic acids] group from a molecule) and produced mainly by the mast cells in connective tissue as a...Found on http://www.wordinfo.info/words/index/info/view_unit/992/
is a product of the amino acid, histidene and is released by damaged cells. Histamine causes an increase in capillary permeability and vasodilation, two vascular events which are the first stages of inflammation. Histamine is also a neurotransmitters substance, released at nerve synapses mostly in the hypothalamus.Found on http://www.eclipse.co.uk/moordent/page5.html
The histamine molecule. Source: Wikipedia Chemical formula: C3
Melting point: 83°C A substance derived from the amino acid histidin...Found on http://www.daviddarling.info/encyclopedia/H/histamine.html
histamine (his'tumēn") , organic compound derived in the body from the amino acid histidine by the removal of a carboxyl group (COOH). Although found in many plant and animal tissues, histamine is specifically important in human physiology because it is one of the chemicals released fr...Found on http://www.infoplease.com/ce6/sci/A0823811.html
Type: Term Pronunciation: his′tă-mēn Definitions: 1. A vasodepressor amine derived from histidine by histidine decarboxylase and present in ergot and in animal tissues. It is a powerful stimulant of gastric secretion, a constrictor of bronchial smooth muscle, and a vasodilator (capillaries and arterioles) that causes a fa...Found on http://www.medilexicon.com/medicaldictionary.php?t=41087
Inflammatory substance normally released in damaged tissues, which also accounts for many of the symptoms of allergy. It is an amine, C5
. Substances that neutralize its activity are known as antihistamines. Histamine was first described in 1911 by British physiologist Henry Da...Found on http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0014155.html
A physiologically active amine, C5H9N3, found in plant and animal tissue and released from mast cells as part of an allergic reaction in humans. It stimulates gastric secretion and causes dilation of capillaries, constriction of bronchial smooth muscle, and decreased blood pressure.Found on http://www.apluspetgoods.com/petsupplies/dog-glossary.php
Powerful molecule produced by mast cells and basophils, that is responsible for an army of unpleasant effects seen in allergy; it causes contraction of smooth muscle and dilation of capillaries and increases the heart rate, among other actions.Found on http://www.thehorse.com/Glossary.xhtml?L=H
Substance that plays a major role in many allergic reactions. Histamine dilates blood vessels and makes the vessel walls abnormally permeable.Found on http://www.emedicinehealth.com/allergy_insect_sting/glossary_em.htm
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