台湾登革热病毒爆发的分子流行病学:人口广泛与人口内部突变分析
You-Yuan Tsai1,2, Dayna Cheng3, Sheng-Wen Huang4
1Department of Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
PLoS neglected tropical diseases
|June 13, 2024
概括
登革热病毒2 (DENV-2) 的特定突变 (C-A314G) 可能是2015年台湾疫情的驱动因素. 另一种突变 (NS4A-L115I) 在感染期间出现,可能有助于病毒在宿主中传播.
科学领域:
- 病毒学 病毒学
- 遗传学 遗传学 是一个
- 流行病学 流行病学
背景情况:
- 登革热病毒 (DENV) 每年在全球造成数百万例感染.
- 台湾在2015年报告了超过22,000例DENV感染,突出显示了区域疾病负担.
研究的目的:
- 为了调查2015年台南疫情中DENV菌株的遗传构成.
- 识别可能导致疫情爆发和病毒病原的遗传突变.
主要方法:
- 来自45个DENV菌株的C-prM-E基因的测序.
- 遗传学分析以确定DENV基因型并确定类替代.
- 反向遗传学来评估突变的功能影响.
- 下一代测序 (NGS) 用于随着时间的推移跟踪患者内的病毒遗传多样性.
主要成果:
- 所有2015年泰南菌株都属于DENV血清型2宇宙基因型.
- 在DENV-2 Cosmopolitan基因型中观察到一个分类替代事件.
- 在所有分离物中发现了一种持久的囊突变,C-A314G (K73R),但在体外显示不稳定.
- 一个新的非同名突变,NS4A-L115I,在一个病人感染期间出现.
结论:
- 突变C-A314G (K73R) 可能导致了2015年台湾的DENV-2疫情.
- NS4A-L115I突变可能为宿主内DENV复制带来优势.
- 病毒的遗传多样性在感染期间演变,特定的突变可能在疫情和病变发生中发挥关键作用.
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