血小板激活因子与气道的关系

被引:1
作者
谢强敏
卞如濂
机构
[1] 浙江医科大学平喘药研究室
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摘要
<正> 现已明确,组织胺、过敏性慢反应物质(SRS-A)、缓激肽(BK)、前列腺素(PG)、血栓素A2(TXA2)、5—羟色胺(5-HT),这些在过敏反应时释放的局部激素,能直接兴奋支气管平滑肌,引起气管强烈收缩,导致哮喘发作。近几年来又发现了一种活性很强的过敏性化学介质-血小板激活因子(Plateletactivating factor,PAF),亦能引起气管强烈收缩和过敏性休克反应,但它并非直接引起支气管和血管平滑肌收缩,主要是通过激活和聚集血小板和多形核粒细胞,促使它们释放化学介质,从而引起气管收缩等病理生理改变。目前认为,PAF与变态反应、炎症和许多免疫复合物病(如系统性红斑狼疮、血清病等)的病理变化有关。最近发现PAF还有收缩冠状动脉的作用。由于PAF涉及面较广,本文着重扼要讨论PAF与气道的关系。
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页码:73 / 76
页数:4
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