染料木黄酮对小鼠T细胞体外活化及增殖的影响

目的:研究染料木黄酮(Gen)对T细胞体外活化及增殖的影响,并探讨其机制。方法:利用荧光标记的单克隆抗体染色结合流式细胞术,检测多克隆刺激剂佛波醇酯(PDB)或刀豆蛋白(ConA)刺激下小鼠T细胞表达活化抗原CD69、CD25的百分率;以羧基荧光素乙酰乙酸(CFSE)标记技术结合流式细胞术,分析PDB＋Ion(Ionomycin)或ConA刺激下T细胞增殖相关指数。结果:Gen对ConA刺激组T细胞CD69、CD25表达有明显抑制作用(P＜0.05),且呈剂量依赖关系,而对PDB刺激组T细胞CD69及CD25表达的抑制需要较高浓度(＞50μmol/L);Gen无论对ConA或PDB＋Ion刺激组T细胞增殖均有显著抑制作用(P＜0.01),且均呈剂量依赖关系。结论:Gen可明显抑制多克隆刺激剂诱导的T细胞体外活化及增殖,其作用机制可能是抑制早期活化相关蛋白酪氨酸激酶活性。

Effect of isoflavone genistein on activation and proliferation of mouse T cells in vitro

AIM: To study the effect of genistein on activation and proliferation of T cells,and explore the molecular mechanism of genistein. METHODS: Fluorescence conjugated monoclonal antibodies and flow cytometry were used to detect the express of CD69 and CD25 by activated T cells in vitro in response to Concanavalin (ConA )and Phorbol 12,13-dibutyrate(PDB) or T cell proliferation stained by CFSE in response to PDB / Ionomycin or ConA. RESULTS: Genistein inhibited the expression of CD69 and CD25 in activated T cells in response to Con A in a concentration-dependent manner and in response to PDB in a high concentration. Genistein inhibited proliferation of T cells in both groups in a concentration-dependent manner. CONCLUSION: Genistein inhibited activation and proliferation of T cells in vitro in response to polyclonal stimulus,and it may hold potential as a new immunosuppressant.