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登革热病毒血清型1,3,4的全球和本地进化动态

Arshi Islam¹, Farah Deeba¹, Bansidhar Tarai²

¹Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, India.

Epidemiology and infection

|June 9, 2023

概括

了解印度的登革热病毒 (DENV) 演变对于预防疫情至关重要. 这项研究揭示了DENV血清型中占主导地位的基因型和不同的核酸替代率,有助于疫苗开发.

科学领域:

病毒学病毒学
进化生物学进化生物学
流行病学流行病学

背景情况:

登革热病毒 (DENV) 在特有地区的演变需要持续监测潜在的爆发.
自然发生的突变会导致DENV.的基因型变异和血清型转移.

研究的目的:

了解印度DENV-1,DENV-3和DENV-4的进化动态.
分析DENV菌株的遗传关系,替代率和种群动态.
提供支持DENV疫苗开发的数据.

主要方法:

使用了遗传学分析,分子钟,贝叶斯天际线图,网络分析,选择压力和分析.
从250个印度DENV样本 (2017-2018) 中分析了部分CprM基因序列.
此外,还添加了来自GenBank的800个全球DENV序列 (DENV-1,DENV-3,DENV-4).

主要成果:

基因型V,III和I分别为DENV-1,DENV-3和DENV-4的主导.
DENV-3 呈现出最高的核酸替代率 (7.90 × 10−4 秒/秒/年),其次是 DENV-4 (6.23 × 10−4 秒/年) 和 DENV-1 (5.99 × 10−4 秒/年).
贝叶斯天际线图显示了三个血清型中不同的人口规模模式,网络分析显示了不同的基因型群.

结论:

这项研究阐明了印度DENV血清型的进化轨迹和遗传多样性.
确定了主要的基因型和替代率,为DENV流行病学提供了洞察力.
结果为有针对性的DENV监测和有效疫苗的开发提供了有价值的数据.

关键词:

贝叶斯分析是贝叶斯分析.登革热病毒感染者基因型基因型基因型遗传学分析遗传学分析血清型的血清型是什么

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