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首页> 外文期刊>Nature immunology >Blockade of eosinophil migration and airway hyperresponsiveness by cPLA_2-inhibition
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Blockade of eosinophil migration and airway hyperresponsiveness by cPLA_2-inhibition

机译:通过cPLA_2抑制作用来阻止嗜酸性粒细胞迁移和气道高反应性

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摘要

We examined the role of a cytosolic phospholipase A_2 (cPLA_2) in antigen-induced eosinophil infiltration of airways and in airway hyperresponsiveness to methacholine. Inhibition of cPLA_2, or blockade of the platelet-activating factor (PAF) receptor, blocked antigen-induced airway hyperresponsiveness and suppressed eosinophil infiltration. Neither cyclooxygenase nor 5-lipoxygenase inhibition had either effect. We show here that, in antigen-sensitized guinea pigs, cPLA_2 inhibition prevents both eosinophilic infiltration and subsequent airway hyperresponsiveness after antigen challenge. we also show that this effect is mediated by first-step hydrolysis of membrane phospholipid into lysophospholipid rather than by prostanoid or leukotriene metabolites of arachidonate.
机译:我们检查了细胞溶质磷脂酶A_2(cPLA_2)在抗原诱导的气道嗜酸性粒细胞浸润和气道对乙酰甲胆碱高反应性中的作用。抑制cPLA_2或阻断血小板活化因子(PAF)受体可阻断抗原诱导的气道高反应性并抑制嗜酸性粒细胞浸润。环氧合酶和5-脂氧合酶均无抑制作用。我们在这里显示,在抗原致敏的豚鼠中,cPLA_2抑制作用既阻止了嗜酸性粒细胞浸润,又阻止了抗原攻击后随后的气道高反应性。我们还表明,这种作用是由膜磷脂第一步水解为溶血磷脂介导的,而不是由花生四烯酸的前列腺素或白三烯代谢产物介导的。

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