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肺泡外肺表面活性物质结合蛋白A研究进展

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摘要 肺表面活性物质结合蛋白A(SP A)是肺表面活性物质中最主要的蛋白成分 ,主要由Ⅱ型肺泡上皮细胞及clara细胞分泌。研究发现 ,在肺泡外也存在相对低水平的SP A ,在传导气道、中耳、咽鼓管、鼻旁窦、胃肠道、生殖道、胸腺、脾脏、间皮及滑膜细胞内均可检测到SP AmRNA及蛋白 ,SP A可与病原及巨噬细胞结合 ,增强巨噬细胞吞噬杀灭病原 ,这些部位的SP A可能与宿主防御有关 。
作者 汪隽瑛
出处 《国外医学(生理病理科学与临床分册)》 2003年第1期86-89,共4页 Foreign Medical Sciences(Pathophysiology and Clinical Medicine)
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