乙肝病毒感染对细胞基本自噬的影响

被引:29
作者
王娟 [1 ,2 ]
时迎娣 [1 ,2 ]
杨怀义 [1 ]
机构
[1] 中国科学院微生物研究所病原微生物与免疫学院重点实验室
[2] 中国科学院研究生院
关键词
乙肝病毒; 细胞自噬; X蛋白;
D O I
10.13343/j.cnki.wsxb.2010.12.006
中图分类号
Q939.4 [病毒(滤过性病毒)];
学科分类号
071005 [微生物学];
摘要
【目的】慢性乙肝病毒(Hepatitis B virus,HBV)感染在肝硬化和肝癌的发生过程中起着重要的作用,通过研究HBV感染对细胞基本自噬的影响,为HBV感染诱发肝癌以及HBV的免疫逃逸机理研究提供新的思路。【方法】本研究利用乙肝病毒表达质粒瞬时或稳定转染不同肝细胞,通过计数绿色荧光蛋白(greenfluorescent protein,GFP)聚集数目检测自噬小体形成,western blot检测LC3(microtubule-associated proteinlight chain 3,微管相关蛋白质轻链3)脂酰化和p62的降解,通过构建HBV B型和C型X蛋白(HBx)的表达质粒并瞬时转染肝癌细胞和正常肝细胞,对不同基因型X蛋白对细胞自噬的影响进行了分析。【结果】乙肝病毒感染后促进了LC3的脂酰化和p62的降解,增加了自噬小体的形成,增强了细胞的基本自噬。进一步研究发现,HBV感染增强的细胞基本自噬水平由HBx所引发,且C型HBx比B型对细胞基本自噬的增加更加显著。【结论】HBV通过HBx增强细胞的基本自噬,且不同基因型HBx对细胞基本自噬的增强程度不同,为进一步阐明HBV感染机理奠定了基础。
引用
收藏
页码:1651 / 1656
页数:6
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