A low molecular weight, bioactive amine that causes smooth muscle contraction of bronchioles, increased capillary permeability, and increased secretions by the nasal and bronchial mucous glands. Released primarily from mast cells and basophils.<\/p>\n
1H-Imidazole-4-ethanamine. A depressor amine derived by enzymatic decarboxylation of histidine. It is a powerful stimulant of gastric secretion, a constrictor of bronchial smooth muscle, a vasodilator, and also a centrally acting neurotransmitter.<\/p>\n
The amine formed by decarboxylation of the amino acid histidine. Excessive release of histamine from mast cells is responsible for many of the symptoms of allergic reactions. It also stimulates secretion of gastric acid, and administration of histamine provides a test for achlorhydria.<\/p>\n
A base that is naturally present in ergot (a fungus) and plants; it is also naturally produced by basophils (basophilic leukocytes) in the human body. It is formed from histidine by decarboxylation, and is held to be responsible for the dilation and increased permeability of blood vessels which play a major role in allergic reactions.<\/p>\n
The defense substance responsible for most inflammation. It is synthesized from the amino acid histidine and is secreted by mast cells, basophils, and blood platelets. It stimulates vasodilation, capillary permeability, muscle contraction of the bronchioles, secretions of a number of glands, and attracts eosinophils, the white blood cells that are capable of controlling the inflammation. Mast cell histamine release is what can cause allergies.<\/p>\n
Substance present in all body tissues and released by injured cells as part of the body\u2019s inflammation process. It functions to dilate capillaries, lower blood pressure, increase gastric secretions, and constrict bronchial smooth muscle.<\/p>\n
A chemical normally present in all body tissues that, upon release, causes dilation of the capillaries and is associated with some allergic reactions.<\/p>\n
A substance released in response to allergens from mast cells throughout the body. Histamines dilate blood vessels, constrict the cells of smooth muscles and cause an increase in acid secretions in the stomach.<\/p>\n
A vasoactive amine, which is normally present in food products such as cheese, wine, cream, fish (especially sardine), sauerkraut, and sausages. Excessive intake of histamine can cause headache, abdominal cramps, tachycardia, urticaria, and in severe cases hypotension, bronchoconstriction, chills, and muscle pain. These symptoms appear within one hour after ingestion and may last for several hours. Histamine can also be produced by bacteria in the gut. It is metabolized very quickly by enzymes in the gut mucosa and liver.<\/p>\n
A chemical produced by various cells in the body, it is involved in the modulation of certain physiologic responses (e.g., secretion of gastric acid) as well as in the mediation of hypersensitivity (allergic) responses.<\/p>\n
Compound found in mast cells and released in allergic responses and inflammatory conditions; it causes small blood vessels to widen, decreases blood pressure, increases gastric secretions, and constricts smooth muscles of the bronchi and uterus. Specific and different receptors are responsible for the gastric effects, which include control over the amount of stomach acid (hydrochloric acid) released. Thus, agents that specifically block these receptor sites (H2 receptors) have been used in the treatment of peptic ulcers, gastritis, and gastroesophageal reflux.<\/p>\n
A depressor amine with powerful stimulation of gastric secretions, constriction of smooth muscle, and vasodilation.<\/p>\n
A chemical that is released by mast cells in the immune system and can act as an irritating stimulant. Histamine is considered responsible for most of the swelling and itching symptoms of hay fever and other allergies. The mast cells lining the skin and the respiratory and gastrointestinal tracts release histamine when an allergen enters the body. The function of histamine is to combat the allergen, which the body perceives as harmful.<\/p>\n
A compound derived from the amino acid histidine. It is found in nearly all tissues of the body, associated mainly with the mast cells. Histamine has pronounced pharmacological activity,, causing dilation of blood vessels and contraction of smooth muscle (for example, in the lungs). It is an important mediator of inflammation and is released in large amounts after skin damage (such as that due to animal venoms and toxins), producing a characteristic skin reaction (consisting of redness and a wheal). Histamine is also released in anaphylactic reactions and allergic conditions, including asthma, and gives rise to some of the symptoms of these conditions.<\/p>\n
An amine derived from histidine. It is widely distributed in the tissues of plants and animals, including humans. It is a powerful stimulant of gastric juice, a constrictor of smooth muscle including that of the bronchi, and dilator of atterioles and capillaries. It is this last action which is responsible for the eruption of urticaria.<\/p>\n
A substance produced from the amino acid histidine, which causes dilation of blood vessels, increased secretion of acid by the stomach, smooth muscle constriction (e.g., in the bronchi), and mucus production, tissue swelling, and itching (during allergic reactions). The release of histamine from mast cells is a major component of type I hypersensitivity reactions, including asthma.<\/p>\n
A chemical released by the immune system (from mast cells) in response to an allergen, resulting in allergy symptoms (runny nose, watery eyes, sneezing, skin rash, etc).<\/p>\n
Histamine, a biochemical discharged by mast cells, which triggers the activation of pain receptors and induces cellular permeability.<\/p>\n
Histamine is a chemical compound predominantly found in mast cells within the body, which is released during an allergic reaction. It activates two main types of receptors: H1 and H2. Activation of H1 is linked to swelling, redness, and inflammation. It also constricts the lung’s airways and induces itching. H2 activation stimulates stomach acid production, but when present in large quantities, it can irritate the stomach lining, leading to conditions such as gastritis or peptic ulcers.<\/p>\n
Allergic reactions triggered by H1 can be managed with antihistamine medications. Excessive stomach acid production due to H2 can be controlled by using H2-receptor antagonists.<\/p>\n
Unusual or excessive hair growth, particularly on the face and legs of certain women.<\/p>\n
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A low molecular weight, bioactive amine that causes smooth muscle contraction of bronchioles, increased capillary permeability, and increased secretions by the nasal and bronchial mucous glands. Released primarily from mast cells and basophils. 1H-Imidazole-4-ethanamine. A depressor amine derived by enzymatic decarboxylation of histidine. It is a powerful stimulant of gastric secretion, a constrictor of bronchial […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-4063","post","type-post","status-publish","format-standard","hentry","category-h"],"yoast_head":"\n