银屑病患者外周血T细胞CD69和CD134表达的研究

Expression of CD69 and CD134 on psoriatic peripheral blood T lymphocytes

目的 了解银屑病患者外周血T细胞CD69和CD134的表达情况及多克隆刺激剂对其表达的影响.方法 取银屑病患者与健康志愿者外周血全血培养,佛波醇脂(PMA)联合Ionomycin刺激使T细胞体外活化;在刺激第0、6、12、24 h,用三色免疫荧光标记流式细胞术检测T细胞CD69、CD134的表达.结果 银屑病患者组和健康对照组各11例纳入研究,结果显示:①银屑病患者组新鲜血标本T细胞CD134、CD69表达率均明显高于健康对照组(P<0.01); ②PMA联合Ionomycin刺激第6、12、24 h,银屑病患者组与健康对照组外周血T细胞CD69表达率仅在第24 h差异具有统计学意义(P<0.05); ③在刺激第6、12、24 h,银屑病患者组外周血T细胞CD134表达率均较健康对照组显著升高(P<0.001).结论 银屑病患者外周血T细胞存在异常活化.在体外活化的外周血T细胞上,银屑病患者组CD134的表达显著高于健康对照组.

Objective To investigate the in vivo expression of CD134 by the peripheral blood T cells from psoriasis patients, the regulation of their expression in response to polyclone stimulator. Methods The whole blood culture procedure was applied to mimic the natural conditions of T cell activation in vivo. T cells were activated by polyclone stimulator PMA plus Ionomycine. CD69 and CD134 expressed in vitro on activated T lymphocytes from psoriasis patients and healthy controls were detected with three-color flow cytometry. Results The results showed that the expression rates of CD134 and CD69 on the peripheral T cells from psoriasis patients were much higher than those of healthy controls (P<0.05). In response to the stimulation of PMA plus Ionomycin, there was only significant difference on the expression rates of CD69 on the peripheral blood T cells between these two groups at 24 h post activation. Whereas, the expression rates of CD134 on psoriatic peripheral blood T cells were significantly increased than those of the healthy controls at all time points (P<0.001). Conclusions The results verified the aberrant activation of the peripheral blood T lymphocytes in psoriasis. Moreover, the expression of CD134 on psoriatic peripheral T cells in response to polyclone stimulators PMA plus Ionomycin is in a stronger manner than those of healthy controls.