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肠胃道是病菌及各种抗原性物质致病的重要通道,因此,胃肠道的免疫功能和身体健康关系十分密切。一、胃肠道淋巴网状组织的免疫功能胃肠道具备一个有免疫活性的淋巴网状组织,它们在免疫功能上有独特的作用,兹分述如下: (一)胃肠道粘膜表层 1981年Selby等采用双重免疫荧光技术,研究正常人的胃、小肠及大肠的表层内存在着表皮内淋巴细胞(简称IEL),在数量上与上皮细胞之此为1:10。发现胃及小肠近端95％IEL属T淋巴细胞,而结肠稍下部位及直肠则85～95％
Gastrointestinal tract is an important pathogenic bacteria and antigenic pathways, therefore, gastrointestinal immune function and health are closely related. First, the gastrointestinal lymphoid network immune function The gastrointestinal tract with an immunocompetent lymph reticular tissue, they have a unique immune function, are as follows: (a) the gastrointestinal mucosal surface 1981 Selby et al. Used double immunofluorescence technique to study the presence of intraepidermal lymphocytes (IELs) in the stomach, small intestine and large intestine of normal people in a quantity of 1:10 with epithelial cells. Found 95% of the stomach and proximal intestine TEL cells are T lymphocytes, while the lower part of the colon and the rectum is 85 to 95%