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分泌性免疫球蛋白A与肠道黏膜免疫的关系及其分泌的营养调控

DOI: 10.3969/j.issn.1006-267x.2012.10.002

Keywords: 分泌性免疫球蛋白A,肠道,黏膜免疫,营养

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Abstract:

分泌性免疫球蛋白A(SIgA)是由J链连接成的二聚体免疫球蛋白A(IgA)与分泌片段结合后形成的复合物。肠道内的SIgA是肠道黏膜免疫中的重要环节之一。SIgA可维持肠道黏膜内环境稳态,调控肠道内源微生态,并在黏膜上皮通过干扰病原体与上皮细胞受体结合,阻止病原体附着宿主细胞,影响病原菌毒力及免疫排异,从而阻止病原体的传播和进一步的感染,因而在免疫防御中起着非常重要的作用。营养因子(如脂肪酸、氨基酸、维生素等)在机体受到病原菌入侵或应激的情况下,可显著促进肠道SIgA的分泌,提高机体对病原菌的抵抗能力,在一定程度上改善应激动物的生产性能。

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