前核突变增强病毒复制,促进持续感染,特别是在HBeAg阴性患者中
Guixin Li1, Danli Yang2, Xin Liu2
1Peking University People's Hospital, Peking University Hepatology Institute, Beijing Key Laboratory of Hepatitis C and Immunotherapy for Liver Diseases, Beijing International Cooperation Base for Science and Technology on NAFLD Diagnosis, Beijing, 100044, China.
Virologica Sinica
|March 16, 2024
概括
乙型肝炎病毒 (HBV) 的前基和基底核心促进子突变增加病毒复制,特别是在HBeAg阴性患者中. 建议这些患者早期接受抗病毒治疗,以防止疾病的进展.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- 前核 (PC) 和基底核促进子 (BCP) 突变在慢性乙型肝炎病毒 (HBV) 感染中很常见,特别是在HBeAg阴性个体中.
- 这些突变对HBV复制的影响仍然不完全理解.
研究的目的:
- 为了研究具有PC和/或BCP突变的HBV的复制能力.
- 阐明与这些突变相关的增强HBV复制和肝损伤的潜在机制.
主要方法:
- 对患者数据的元分析,以评估HBV DNA负载.
- 在体外细胞培养和体内水力动力注射小鼠模型中评估病毒复制.
- 人类肝细胞嵌合体小鼠模型研究复制,蛋白质积累和肝损伤.
- 对内细胞网膜应激和TNF信号通路的分析.
主要成果:
- 在HBeAg阴性患者中,PC突变显著增加了HBVDNA负载 (7.41倍).
- 单独的PC突变和BCP+PC突变都在体外和体内增强了HBV复制.
- BCP+PC突变增加了复制能力,核心蛋白质的积累,并诱导了嵌合体小鼠的严重肝损伤.
- 基因组突变使得preCRNA能够作为mRNA起作用,使ccccDNA池保持HBeAg阴性状态.
- BCP+PC突变激活了细胞内网膜应激和TNF信号传递.
结论:
- PC和BCP突变促进HBV复制和致病性,特别是在HBeAg阴性个体中.
- 这些突变通过涉及ccDNA维护,ER压力和TNF信号传递的机制导致肝损伤.
- 定期监测HBV突变和早期抗病毒治疗对于HBeAg阴性患者来说至关重要,以防止疾病的进展.
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