kinin

kinin
One of a number of widely differing substances having pronounced and dramatic physiologic effects. Some ( e.g., kallidin and bradykinin) are polypeptides, formed in blood by proteolysis secondary to some pathological process, that stimulate visceral smooth muscle but relax vascular smooth muscle, thus producing vasodilation; others ( e.g., kinetin) are plant growth regulators. [G. kineo, to move, + -in]
- k. 9 SYN: bradykinin.

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ki·nin 'kī-nən n
1) any of various polypeptide hormones that are formed locally in the tissues and cause dilation of blood vessels and contraction of smooth muscle
2) CYTOKININ

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n.
one of a group of naturally occurring polypeptides that are powerful vasodilator, which lower blood pressure, and cause contraction of smooth muscle. The kinins bradykinin and kallidin are formed in the blood by the action of proteolytic enzymes (kallikreins) on certain plasma globulins (kininogens). Kinins are not normally present in the blood, but are formed under certain conditions; for example when tissue is damaged or when there are changes in the pH and temperature of the blood. They are thought to play a role in inflammatory response.

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ki·nin (kiґnin) [Gr. kinein to move] any of a group of vasoactive straight-chain polypeptides formed by kallikrein-catalyzed cleavage of kininogens; they cause vasodilation of most vessels but vasoconstriction of the pulmonary bed, and they also alter vascular permeability. Common examples are bradykinin and kallidin.

Medical dictionary. 2011.

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Look at other dictionaries:

  • Kinin — Kinin, so v.w. Chinin …   Pierer's Universal-Lexikon

  • kìnīn — m 〈G kinína〉 farm. alkaloid iz kore kininovca, lijek protiv malarije ✧ {{001f}}engl. ← šp …   Veliki rječnik hrvatskoga jezika

  • kinin — kìnīn m <G kinína> DEFINICIJA farm. alkaloid iz kore kininovca, lijek protiv malarije ETIMOLOGIJA engl. quinine ← šp. quina ← kečuan …   Hrvatski jezični portal

  • kinin — [kī′nin] n. [< KIN(ETIC) + IN1] a powerful, short lived peptide that lowers blood pressure, increases vascular permeability, dilates blood vessels, causes smooth muscle to contract, and triggers pain …   English World dictionary

  • Kinin — A kinin is any of various structurally related polypeptides, such as bradykinin and kallikrein. They are members of the autacoid family. [MeshName|Kinins] They act locally to induce vasodilation and contraction of smooth muscle.… …   Wikipedia

  • Kinin — Kinine sind zu den Gewebshormonen zählende biologisch aktive Oligopeptide, sie werden von Kallikrein aus Kininogenen (inaktive Vorstufe von Kininen) freigesetzt. Das Kinin Kallikrein System oder einfach Kininsystem ist ein schlecht abgrenzbares… …   Deutsch Wikipedia

  • kinin — is., kim., Fr. quinine Kınakınadan elde edilen ve sıtmanın tedavisinde kullanılan beyaz alkaloit, kinin sülfatı İkinci gün sıtmadan şüphelendik, kuvvetli dozda kinin verdik. R. N. Güntekin Birleşik Sözler kinin sülfatı Atasözü, Deyim ve Birleşik… …   Çağatay Osmanlı Sözlük

  • kinin — /kuy nin, kin in/, n. Biochem. 1. cytokinin. 2. any of a group of hormones, formed in body tissues, that cause dilation of blood vessels and influence capillary permeability. [1950 55; independent use of KININ, or (CYTO)KIN(ESIS) + IN2] * * * …   Universalium

  • kinin — A substance promoting cell division. In plant systems, the prefix cyto has been added (cytokinin) to distinguish it from kinin in animal systems …   Glossary of Biotechnology

  • Kinin-kallikrein system — The kinin kallikrein system or simply kinin system is a poorly delineated system of blood proteins that plays a role in inflammation, blood pressure control, coagulation and pain. Its important mediators bradykinin and kallidin are vasodilators… …   Wikipedia

  • Kinin-Kallikrein-System — Kinine sind zu den Gewebshormonen zählende biologisch aktive Oligopeptide, sie werden von Kallikrein aus Kininogenen (inaktive Vorstufe von Kininen) freigesetzt. Das Kinin Kallikrein System oder einfach Kininsystem ist ein schlecht abgrenzbares… …   Deutsch Wikipedia

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