原代培养的小鼠星形胶质细胞CD46、CD55、CD59的表达及炎症刺激因子对其的影响

Expression of CD46, CD55, and CD59 on primary murine astrocytes and effect of inflammation factors on it

目的通过体外培养小鼠大脑皮层星形胶质细胞,明确补体调节蛋白CD46、CD55、CD59在原代小鼠大脑皮层星形胶质细胞上的表达情况,及炎症因子对CD46、CD55、CD59表达的影响,为研究补体系统在AD中的作用打下基础。方法原代纯化培养小鼠星形胶质细胞,用RT PCR,免疫荧光的方法,分别在mRNA水平、蛋白质水平,检测炎症因子刺激前以及LPS、IFNγ单独或协同刺激后,CD46、CD55、CD59的表达情况。结果RT PCR检测到CD59mRNA的表达,CD46、CD55的表达不明确,未刺激组和刺激组无明显差别;免疫荧光结果示CD59阳性,CD46、CD55弱阳性。结论保护素CD59在原代小鼠星形胶质细胞上显著表达,可能可以保护星形胶质细胞免受补体的溶破效应的杀伤。

Objective To identify the expression of complement regulatory protein CD46, CD55, and CD59 on primary murine pallium astrocytes and the effect of inflammatory factors on it in order to lay the foundation for studying the complement system in AD. Methods The primary murine astrocytes were cultured and purified. The expression of CD46, CD55, and CD59 on the levels of mRNA and protein was assayed by immunofluoreseenee before and after the stimulation of LPS and IFN-γ. Results The expression of CD59 mRNA was confirmed, but the expression of CD46 and CD55 was indefinite. There was no significant difference between stimulation and non-stimulation groups. Immunofluorescence results indicated that CD59 was positive, while CD46 and CD55 were weakly positive. Conclusion Protectin CD59 expresses copiously on primary murine astrocytes, which presumably protects astrocytes from the lysis of complement.