https://wikimd.com/index.php?action=history&feed=atom&title=AutacoidAutacoid - Revision history2026-04-08T20:51:41ZRevision history for this page on the wikiMediaWiki 1.44.2https://wikimd.com/index.php?title=Autacoid&diff=5879456&oldid=prevPrab: CSV import2024-06-01T21:43:48Z<p>CSV import</p>
<p><b>New page</b></p><div>'''Autacoid'''<br />
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'''Autacoids''' are biological factors that act like local hormones, have a brief duration, and act near their site of synthesis. They are involved in various physiological and pathological processes. Autacoids include [[histamine]], [[serotonin]], [[prostaglandins]], and [[bradykinin]]. These substances play crucial roles in inflammation, pain, and other bodily functions.<br />
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==Types of Autacoids==<br />
Autacoids can be classified into several categories based on their chemical nature and function:<br />
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* '''[[Amine]]s''': This group includes [[histamine]] and [[serotonin]]. Histamine is involved in allergic reactions and gastric acid secretion, while serotonin regulates mood, appetite, and sleep.<br />
* '''[[Lipid]]-derived autacoids''': These include [[prostaglandins]], [[leukotrienes]], and [[thromboxanes]]. Prostaglandins are involved in inflammation and pain, leukotrienes in allergic reactions, and thromboxanes in blood clotting.<br />
* '''[[Peptide]]s''': This category includes [[bradykinin]] and [[angiotensin]]. Bradykinin causes blood vessels to dilate, leading to a drop in blood pressure, while angiotensin is involved in blood pressure regulation.<br />
* '''[[Gasotransmitter]]s''': These include [[nitric oxide]] and [[carbon monoxide]]. Nitric oxide is a vasodilator, and carbon monoxide has various signaling roles in the body.<br />
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==Functions==<br />
Autacoids have diverse functions in the body, including:<br />
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* '''Inflammation''': Many autacoids, such as [[prostaglandins]] and [[leukotrienes]], play a role in the inflammatory response.<br />
* '''Pain''': Autacoids like [[bradykinin]] and certain [[prostaglandins]] are involved in the sensation of pain.<br />
* '''Allergic reactions''': [[Histamine]] and [[leukotrienes]] are key mediators in allergic responses.<br />
* '''Vasodilation and vasoconstriction''': Autacoids such as [[nitric oxide]] and [[angiotensin]] regulate blood vessel diameter and blood pressure.<br />
* '''Gastrointestinal function''': [[Histamine]] stimulates gastric acid secretion.<br />
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==Clinical Significance==<br />
Autacoids are targets for various drugs used to treat conditions like allergies, inflammation, pain, and hypertension. For example:<br />
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* [[Antihistamine]]s block the action of histamine and are used to treat allergic reactions.<br />
* [[Nonsteroidal anti-inflammatory drug|NSAIDs]] inhibit the synthesis of prostaglandins and are used to reduce inflammation and pain.<br />
* [[ACE inhibitor]]s block the formation of angiotensin and are used to treat high blood pressure.<br />
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==Related Pages==<br />
* [[Histamine]]<br />
* [[Serotonin]]<br />
* [[Prostaglandin]]<br />
* [[Bradykinin]]<br />
* [[Leukotriene]]<br />
* [[Thromboxane]]<br />
* [[Nitric oxide]]<br />
* [[Angiotensin]]<br />
* [[Antihistamine]]<br />
* [[Nonsteroidal anti-inflammatory drug]]<br />
* [[ACE inhibitor]]<br />
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[[Category:Biochemistry]]<br />
[[Category:Pharmacology]]<br />
[[Category:Physiology]]<br />
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