What is histamine?

  • (noun): Amine formed from histidine that stimulates gastric secretions and dilates blood vessels; released by the humane immune system during allergic reactions.

Histamine

Histamine is an organic nitrogen compound involved in local immune responses as well as regulating physiological function in the gut and acting as a neurotransmitter. Histamine triggers the inflammatory response. As part of an immune response to foreign pathogens, histamine is produced by basophils and by mast cells found in nearby connective tissues. Histamine increases the permeability of the capillaries to white blood cells and some proteins, to allow them to engage pathogens in the infected tissues.

Read more about Histamine.

Some articles on histamine:

Doda (drug) - Effects
... Benadryl (diphenhydramine HCl), a histamine antagonist may be used to counteract the histamine reaction to opioids, resulting in decreased itchy feeling and increased drug effect duration ... A non-drowsy anti-histamine can work just as well to combat itching ...
Ciproxifan
... Ciproxifan is an extremely potent histamine H3 inverse agonist/antagonist ... The histamine H3 receptor is an inhibitory autoreceptor located on histaminergic nerve terminals, and is believed to be involved in modulating the release of histamine in the brain ... Histamine has an excitatory effect in the brain via H1 receptors in the cerebral cortex, and so drugs such as ciproxifan which block the H3 receptor and consequently ...
Clocinizine - See Also
... Olopatadine Histaminergics Receptor H1 Agonists 2-Pyridylethylamine Betahistine Histamine HTMT UR-AK49 Antagonists 1st generation 4-Methyldiphenhydramine Alimemazine ...
Histamine - History
... The properties of histamine, then called β-iminazolylethylamine, were first described in 1910 by the British scientists Henry H ... H substance" or "substance H" are occasionally used in medical literature for histamine or a hypothetical histamine-like diffusible substance released in allergic reactions of skin and in the responses of tissue ...
Biogenic Amines - Examples
... Some prominent examples of biogenic amines include Histamine - a substance derived from the amino acid histidine that acts as a neurotransmitter mediating arousal and attention, as well as a ... Histamine is also an important stimulant of HCl secretion by the stomach through histamine H2 receptors ...