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针对HCV 5'-UTR的针对性短读NGS用于基因型识别和子变异的识别,使用Ion Torrent平台
Ritu Sagar1, Pushpendra Singh1,2, Mukesh Kumar Jogi1,3
1Division of Molecular Biology, ICMR-National Institute of Cancer Prevention and Research, Noida, India.
Nucleosides, nucleotides & nucleic acids
|October 8, 2025
概括
肝炎C病毒 (HCV) 基因定型和宿主内部变体检测得到了改进,使用保存的5'未翻译区域的目标下一代测序. 这种方法准确地识别病毒亚型和低频变异,以增强分子流行病学.
科学领域:
- 病毒学 病毒学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 型肝炎病毒 (HCV) 是一种可变RNA病毒,由于其易发生错误的RNA聚合酶,产生显著的宿主内部变异 (准物种).
- 在HCV基因组中高度保存的5'未翻译区域 (5'UTR) 是临床环境中基因型定型的关键目标.
研究的目的:
- 评估针对HCV5'UTR的针对性短读下一代测序 (NGS) 的性能,用于基因型分配和低频宿主内部变异的检测.
- 评估这种方法对分子流行病学和传播追踪的有用性.
主要方法:
- 来自五个临床血样本的HCV5'UTR的嵌套RT-PCR放大.
- 使用Ion Torrent技术 (Ion Gene Studio S5平台) 进行测序,产生200-300个核酸读数.
- 对共识序列生成,SNP,indel和宿主内部单核酸变体 (iSNV) 检测的读数的生物信息分析.
主要成果:
- 遗传学分析证实,所有分离物属于3型基因组,子集群表明3a型基因组和其他基因内变异.
- 确定了14个单核酸多态 (SNP) 和多个低频 iSNV,在特定位置的变异频率高达25% (72,78,128).
- 证明了该方法能够有效地区分基因型和亚变体结构的能力.
结论:
- 针对HCV5'UTR的向NGS是一种可靠的策略,用于准确的基因型定型和对宿主内部变异的敏感检测.
- 这种方法增强了分子流行病学,促进了传播调查,并支持个性化治疗决策,特别是在资源有限的环境中.
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