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- 2017
NLRP3、AIM2、IFI16炎症小体在慢性乙型病毒性肝炎患者PBMC中的活化水平和与HBV感染的相关性分析
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Abstract:
摘要 目的: 探讨乙肝病毒(HBV)是否激活了慢性乙型病毒性肝炎(CHB)患者外周血单个核细胞(PBMCs)内核苷酸结合寡聚化结构域样受体蛋白3(NLRP3)、黑色素瘤缺乏因子2(AIM2)和干扰素诱导蛋白16(IFI16)炎症小体,分析HBV影响炎症小体活化的可能机制.方法:收集感染内科临床确诊CHB患者35例.同时选取健康住院医师28例为对照.以常规淋巴细胞分层液密度梯度离心法分离健康对照组和CHB患者组静脉血得到PBMCs,采用逆转录、实时荧光定量PCR检测CHB患者组和健康对照组PBMCs NLRP3、AIM2、IFI16、凋亡相关的斑点样蛋白(ASC)、半胱天冬酶1(CASP1)、IL-1β、IL-18 mRNA表达水平,ELISA法检测两组血清中IL-1β蛋白分泌水平.结果:CHB患者组和健康对照组PBMCs ASC、NLRP3、AIM2、IL-1β、IL-18 mRNA表达水平及两组血清IL-1β蛋白分泌水平无显著性差异.CHB患者组PBMCs IFI16、CASP1 mRNA表达水平显著上调,且IFI16 mRNA表达水平与患者血清HBV DNA载量显著正相关(r=0.699 8,P<0.01).结论:慢性HBV感染未导致CHB患者PBMCs NLRP3、AIM2炎症小体的活化;尽管 HBV DNA可能诱导了CHB患者IFI16炎症小体的高表达,但通过抑制pro-caspase-1的活化、IL-1β的表达,HBV阻断了IFI16炎症小体的活化效应.
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