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Slow-reacting substance of anaphylaxis : ウィキペディア英語版 | Slow-reacting substance of anaphylaxis
The Slow-reacting substance of anaphylaxis or SRS-A is a mixture of the leukotrienes LTC4, LTD4 and LTE4. Mast cells secrete it during the anaphylactic reaction, inducing inflammation. It can be found in basophils. It induces prolonged, slow contraction of smooth muscle and has a major bronchoconstrictor role in asthma. Compared to histamine, it is approximately 5000 times more potent and has a slower onset but longer duration of action. ==References== 〔
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Slow-reacting substance of anaphylaxis」の詳細全文を読む
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