IL—2、IL—4和 IL—6对 T 细胞活化增殖的影响途径比较

The comparison of the effects of IL—2,IL—4 and IL—6 on the proliferative pesponses of T cells.

单一的 PHA/PMA/OKT3不能诱导纯化的静止 T 细胞发生增殖反应,这为我们比较外加 IL—2/IL—4/IL—6对 T 细胞活化增殖的影响途径提供了条件.PHA 诱发了静止 T 细胞对 IL—2/IL—4/IL—6的增殖反应,而 anti—Tac 单抗只能抑制由 IL-2介导的增殖反应.PMA 能够诱导静止 T 细胞对 IL—2/IL—4发生增殖反应,而不对 IL—6发生增殖反应.OKT3单抗只能诱导静止 T 细胞对 IL—2发生增殖反应.免疫抑制剂环孢霉素 A(C_(?)A)均能抑制 PHA 联合 IL—2/IL—4/IL—6所诱发的 T 细胞增殖反应,但其抑制作用的动力学观察却得到三种完全不同形式的抑制结果.这些结果表明,这三种淋巴因子各有其独自的途径使T 细胞活化增殖.

PHA,PMA or OKT3 McAb alone can not induce the proliferative responses of purified resting T cells,which enables us to comparise the effects of exogenous IL—2,IL—4 and IL—6 on the activation and proliferation of T cell.PHA can induce purifeid resting T cells responding to exgenous IL—2,IL—4 or Il—6 and anti—Tac(p55)McAb only blocked the proliferative response of PHA—stimulated T cells responding to IL—2.PMA can induce purified resting T cells responding to exogenous IL—2 or IL—4 but not Il—6.OKT3 McAb only induced the purified resting T cells responding to exogenous IL—2.Cyclsporin A,an immunosuppressant(CsA),inhibited the proliferative responses of PHA—stimulated T cells responding to exogenous IL—2,IL—4 or IL—6,but in the kinetic study of inhibitory affect of CsA,the results were completely different.Our data suggest that IL—2,IL—4 and IL—6 activate T cell by different pathway.