摘要:目的:探讨患者外周血清白介素-17A(serum Interleukin-17A,IL-17A)对肝癌细胞可溶性MICA(soluble major histocompatibility complex class Ichain-related gene A,sMICA)的调控作用及可能机制.方法:收集慢性肝炎(chronic hepatitis,CH)、肝硬化(liver cirrhosis,LC)、HCC、健康对照者(healthcontrol,HC)各30例,采用ELISA方法分别检测血清sMICA及IL-17A的表达水平;HepG2和PLC/PRF/5细胞加入0、10、50ng/mL的重组人IL-17A(RhIL-17A)作用24h后,分别采用ELISA检测sMICA的表达;并在50ng/mL的RhIL-17A作用24h后,采用流式细胞术(flow cytometry,FCM)检测膜型MICA的表达、荧光定量RT-PCR检测MICA mRNA的表达、Western blot检测ADAM9,p65和磷酸化p65(P-p65)的表达.结果:HCC组血清IL-17A与sMICA水平明显高于CH、LC、HC组(IL-17AF=46.321,sMICAF=24.144,P〈0.01),且二者呈正相关(r=0.28,P〈0.01);RhIL-17A显著增加HCC细胞sMICA、膜MICA mRNA的表达(P〈0.05),且可增加HCC细胞ADAM9和P-p65蛋白的表达.结论:IL-17A能上调肝癌细胞MICA mRNA表达,可能与其活化NF-B-ADAM9信号通路,从而增加HCC sMICA的表达有关.
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