放线菌酮对小鼠T细胞活化影响的血清免疫药理评价

目的:利用淋巴细胞的早期活化标记物CD69的表达,探讨CHX对T淋巴细胞体外活化的影响。方法:分离小鼠淋巴结细胞,分别与放线菌酮(CHX)、CHX血清预孵1h,加入多克隆刺激剂继续培养,总计培养24h后收获细胞,进行双色免疫荧光标记,以流式细胞术对T细胞的CD69分子表达情况进行分析。结果:在CHX(终浓度10μmol/L)、CHX血清作用下,ConA活化的T细胞CD69表达百分率依次为(12.33±4.75)%、(20.39±6.32)%,与相应对照[分别为(64.67±3.00)%、(64.35±10.13)%]比较均有显著差异(P＜0.01);相应的,药物作用下PDB活化的T细胞CD69表达的百分率依次为(13.07±11.05)%、(6.10±4.91)%,与相应对照[分别为(84.79±6.87)%、(79.68±4.17)%]比较均有显著差异(P＜0.01)。结论:CHX(10μmol/L)、5%的CHX血清对ConA、PDB活化的T淋巴细胞均显示了强烈的抑制效应,证明T细胞活化过程中CD69的表达存在蛋白质的从头合成,对"CD69表达中CD69分子可能储存于细胞浆及其表达的发生并不需要蛋白质的从头合成"这一观点提出质疑。

Serum immunopharmacological assessment: effects of cycloheximide on the activation of T lymphocytes of mouse

AIM:To investigate the effect of cycloheximide on the T cells activation by mitogenin vitro with CD69 expression as activation marker for the application of this drug clinically. METHODS:Lymphocytes were isolated from lymphoid nodes of C57BL/6 mouse. The cells were preincubated with cycloheximide(CHX), 5% serum containing CHX respectively for an hour, then further incubated with polyclonal activators (Con A or PDB). Harvesting the cells after whole incubation for 24 h, we estimated the expression rates of CD69 on T cells by flow cytometry following two-color immunofluorescent staining. RESULTS: The expression rates of CD69 on the T cells preincubated with CHX, serum containing CHX after the stimulation in response to Con A or PDB all showed significant difference with the expression rates of control group, respectively (P＜0.01). CONCLUSION:Both CHX(10 μmol/L)and 5% serum containing CHX show potently inhibitory effects on the activation of T cells in response to stimulation of Con A or PDB. Our data show that there is de novo protein synthesis for the expression of CD69 during the activation of T cells. We questioned the viewpoint that CD69 can reside within the cytoplsam and expression can occur without de novo protein synthesis.