不同免疫抑制方法对树突状细胞分化成熟影响的比较

EFFECT OF IMMUNOSUPPRESSANT ON DIFFERENTIATION AND MATURATION OF MURINE BONE MARROW-DERIVED DENDRITIC CELLS

目的:比较不同免疫抑制药物单独或联合作用下对树突状细胞(DC)成熟状态的影响,初步探讨联合应用免疫抑制剂的有效性及作用机制。方法:体外培养小鼠的骨髓DC分为对照组,实验组:加入免疫抑制药物地塞米松(DEX)、环磷酰胺(CTX)、甲基强的松龙(MP),检测培养液上清中白细胞介素12(IL-12)的水平和细胞共刺激分子CD80、CD86的表达水平。结果:实验组成熟DC培养液上清中IL-12的水平、共刺激分子CD80及CD86表达水平均低于对照组(P<0.05);单独的DEX、CTX、和MP处理组的DC CD80、CD86的表达水平降低和CTX+DEX组、CTX+MP组的DC的表达水平下降相近,两两比较差异无统计学意义(P>0.05)。结论:不同的免疫抑制药物(DEX、CTX、MP)均可影响和阻止DC的进一步成熟,从而增强免疫耐受性,可能是此类药物治疗自身免疫性疾病的重要靶点;对DC成熟的抑制作用与药物浓度呈正相关,但两种免疫抑制药物协同刺激与单一药物刺激比较并不增加对DC成熟的抑制效果,有可能在免疫抑制药物协同作用下在对DC成熟性和机体免疫应答反应上存在不同的机制。

Objective:To observe the different effect of several immunosuppressants on dendrite cells(DC) in different mature status in vitro.Methods:Dendrite cells were divided into six groups:group A was controls, groups B,C,D,E and F were added different immunosuppressants(DEX,CTX and MP) with different dose.The level of IL-12 in the culture medium was detected by ELISA,and surface costimulatory factors CD80 and CD86 of DC in the six groups were detected by flow cytometry.Results:The level of IL-12 increased with th...