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NSm是脊椎动物和蚊子宿主之间bunyavirus传播的关键决定因素
Selim Terhzaz1, David Kerrigan1, Floriane Almire1
1MRC-University of Glasgow Centre for Virus Research, Glasgow, G61 1QH, Scotland, UK.
Nature communications
|January 31, 2025
概括
载体传播的布尼亚病毒需要一种特定的蛋白质,NSm,才能传播. 这种蛋白质对于病毒在吃血后从蚊子的肠道中部传播至关重要,从而使关节动物传播到脊椎动物.
科学领域:
- 病毒学 病毒学
- 关节动物传播的病毒
- 病毒的进化是病毒的进化.
背景情况:
- 布尼亚维拉科 (Bunyavirales) 是一个大型的病毒类别,拥有多样化的宿主,包括关节动物和脊椎动物.
- 一些bunyaviruses通过关节动物载体在人类和动物中引起重大疾病.
- 昆虫病毒中载体传播的进化基础仍然不清楚.
研究的目的:
- 在载体传播的布尼亚病毒中研究非结构蛋白NSm的功能.
- 了解NSm在病毒感染和关节动物载体传播中的作用.
- 阐明使病毒在关节动物和脊椎动物宿主之间传播的进化机制.
主要方法:
- 利用了布尼亚姆韦拉病毒 (BUNV) 和埃及蚊子 (Aedes aegypti) 蚊子模型系统.
- 在实验室中评估了NSm在蚊子细胞中的病毒复制中的作用.
- 研究了NSm对病毒感染的必要性,并在血饭后在体内传播.
主要成果:
- 在蚊子细胞中,NSm对于Bunyamwera病毒的复制是不可或缺的.
- 对于蚊子中肠和随后感染的病毒输出至关重要.
- 对NSm的要求是特定于中肠障碍;绕过它会否定NSm对系统传播的必要性.
结论:
- 非结构性蛋白NSm是一个关键因素,可以使昆虫病毒通过载体传播传播.
- NSm促进病毒通过中肠屏障,这是关节动物传播病毒的关键步骤.
- 这一发现揭示了关节动物传播的布尼亚病毒的传播周期的关键进化适应.
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