【作者】 白玉杰；

【导师】 苏成芝； 杨安钢； 王方；

【作者基本信息】 第四军医大学 ， 生物化学与分子生物学， 1996， 博士

【摘要】 CD3分子是成熟T淋巴细胞表面的一种分化抗原，与T细胞表面 受体(TCR)紧密结合构成TCR／CD3复合物，TCR识别和结合抗原后，通过CD3分子的信号转导系统，将刺激信号传入T淋巴细胞内部，激活酪氨酸激酶(PTK)及蛋白激酶c(PKC)，触发一系列级联效应及多种细胞因子的释放。最终导致T淋巴细胞的活化。抗CD3抗体具有丝裂原作用，可诱导T淋巴细胞的活化和增殖，一般认为是抗CD3抗体与CD3分子结合后，导致TCR／CD3复合物构型改变，并通过其它辅助细胞参与，引起更多还原

【Abstract】 CD3 molecule is a differential antigen which is present on the surface of mature lymphocytes. The CD3 molecule exists as a TCR/ CD3 complex by tightly associated with T-cell receptor (TCR). When T- cell receptor binding and recognizing antigen, the signal is transducted into T cell through CD3 molecules, as a result of TCR / CD3 triggering, lead to release of cytokines and activate the T lymphocytes. Anti-CD3 McAbs may disrupt T cell by blocking and modutating the TCR and they strongly supress T cell-mediated responses by causing T cell depletion. The anti -CD3 McAb(OkT3) was first used as an immunosupresive agent in transplant recipients. It is also found that anti-CD3 McAbs have the ability to induce T lymphocytes activation and proliferation. There is a hypothesis that the anti-CD3 McAbs change the conformation of TCR/CD3 as they binding the CD3 moleucles, induce the release of更多还原