在HBeAg阴性慢性乙型肝炎中,全长HBV准物种的适应性进化和明显的突变特征
Changhui Wu1,2, Fengwei Liu1,3, Xiao Li3
1Kunming Medical University, Kunming, Yunnan, China.
MicrobiologyOpen
|November 28, 2025
概括
在HBeAg阴性患者中,B型肝炎病毒 (HBV) 准物种表现出更大的多样性和复杂性,采用适应性策略以逃脱免疫力. 这为慢性乙型肝炎 (CHB) 管理提供了洞察力.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 遗传学 遗传学 是一个
背景情况:
- 乙型肝炎病毒 (HBV) 准物种的演变影响慢性乙型肝炎 (CHB) 的进展.
- 基于乙型肝炎e抗原 (HBeAg) 状态的HBV准物种特征存在有限的数据.
研究的目的:
- 分析和比较HBeAg阳性与HBeAg阴性治疗先前的CHB患者中的HBV类型的进化概况.
- 阐明HBV在HBeAg阴性个体中使用的适应性策略.
主要方法:
- 分子克隆和桑格测序来自19名长期感染CHB患者的289个全长HBV克隆.
- 对准物种多样性,遗传结构,选择压力和突变模式的分析.
主要成果:
- 与HBeAg阳性患者相比,HBeAg阴性患者表现出较高的类物种多样性 (1.09%与0.44%的差异) 和复杂的族系.
- 在HBeAg阴性患者中,在表面 (S),聚合酶 (Pol) 和X区域发现了增加的积极选择部位,通常在T/B细胞表观内.
- 经典的基底核心促进子 (BCP) 和前核 (PreC) 突变在HBeAg阴性克隆中很常见,同时也存在肠内重组和不对称的框架转移模式.
结论:
- HBeAg阴性CHB患者利用各种适应性策略,包括遗传突变和重组,以维持HBV复制和免疫逃避.
- 结果为监测CHB和开发治疗干预措施提供了关键的机制见解.
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