Klein J R, Kagnoff M F
J Exp Med. 1984 Dec 1;160(6):1931-6. doi: 10.1084/jem.160.6.1931.
We have examined cytotoxic responses of lymphocytes derived from the gut epithelium of mice primed systemically and enterically with alloantigens. Both gut intraepithelial (IEL) and splenic lymphocytes from alloantigen-primed mice were found to contain antigen-specific cytotoxic T cell activity. However, after priming, gut IEL also developed high levels of natural killer and spontaneous cytotoxic cell activities. We suggest that this nonspecific activation of additional cytotoxic effector populations during an antigen-specific response is an important host immune defense within the intestinal mucosa.
我们检测了经全身和肠道用同种异体抗原致敏的小鼠肠道上皮来源淋巴细胞的细胞毒性反应。发现来自同种异体抗原致敏小鼠的肠道上皮内(IEL)淋巴细胞和脾淋巴细胞均含有抗原特异性细胞毒性T细胞活性。然而,致敏后,肠道IEL还产生了高水平的自然杀伤细胞和自发细胞毒性细胞活性。我们认为,在抗原特异性反应过程中这种额外细胞毒性效应细胞群体的非特异性激活是肠道黏膜内重要的宿主免疫防御机制。