主因RBM25通过阴阳1介导的ccccDNA转录促进HBV复制
Yukun Li1, Tianhao Mao2, Liwei Zheng1
1Department of Microbiology & Infectious Disease Center, School of Basic Medical Sciences, Peking University, Beijing, 100191, China.
Virologica Sinica
|May 24, 2025
概括
RNA结合动机蛋白25 (RBM25) 通过与HBVccDNA相互作用并上调转录因子YY1.1,从而增强B型肝炎病毒 (HBV) 复制. 这一发现为针对持续性HBV感染的抗病毒疗法提供了新的点.
科学领域:
- 肝病学和病毒学.
- 分子生物学和宿主-病原体相互作用
背景情况:
- 乙型肝炎病毒 (HBV) 持续存在的共闭环形DNA (cccDNA) 阻碍了有效的抗病毒治疗.
- 了解HBVcccDNA转录调节对于开发新疗法至关重要.
研究的目的:
- 为了研究RNA结合基因蛋白25 (RBM25) 在HBV复制中的作用.
- 阐明RBM25影响HBVccDNA转录和复制的分子机制.
主要方法:
- 利用HBV复制细胞模型和水力动力注射小鼠模型.
- 评估HBV复制标志物 (HBV DNA,HBeAg,HBsAg,HBV RNA,L-HBs) 在RBM25倒置和过度表达后.
- 研究了RBM25与ccccDNA的结合及其对宿主转录因子的影响,特别是阴阳1 (YY1).
主要成果:
- RBM25敲击显著抑制了HBV复制标志物.
- 过度表达RBM25显著增强了HBV复制.
- RBM25与HBVccDNA结合,通过YY1的上调和基因素乙化促进转录.
结论:
- RBM25被确定为一种促进HBV复制的新型宿主因子.
- RBM25通过上调YY1依赖cccDNA的激活来增强HBV转录.
- 在HBV核心蛋白和RBM25之间存在一个相互调节循环,维持病毒复制.
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