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文献和实验Assaying Phospholipase A2 Activity
Mammalian cells contain many structurally and functionally diverse phospholipases A2 (PLA2 ) that catalyze the hydrolysis of sn-2 fatty acid from membrane phospholipid. Assays are described for measuring the activity of Group IVA cytosolic
formation (2 ) and specific eicosanoids seem to be produced by specific cell types in response to various inflammatory stimuli (3 ). The multiple synthetic pathways suggest that multiple sites of inhibition may exist. Phospholipase A2 (PLA2 ) acts on cell
的发挥需与多种胞内蛋白相互作用,而这首先需要MIF信号的跨膜传递。克隆表达和功能分析发现CD74是MIF的高亲合力膜结合蛋白,起着MIF跨膜受体的作用。在重组可溶性CD74分子,MIF结合于其109-149氨基酸残基部位,从而活化胞外MAPK信号传导、细胞增殖分化和前列腺素E2的产生[3]。 2.2 对糖皮质激素(GC)作用的调节 2.2.1 cPLA2机制 胞浆磷脂酶A2(cPLA2)及其活化后产物花生四烯酸是炎症反应的重要调节因子。GC以cPLA2为目标
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