蝙蝠传播的H9N2流感病毒逃避了MxA的限制,并且在中表现出高效的复制和传播
Nico Joel Halwe1, Lea Hamberger2,3, Julia Sehl-Ewert4
1Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, 17493, Greifswald, Insel Riems, Germany.
Nature communications
|April 25, 2024
概括
来自埃及水果蝙蝠的禽流感A病毒 (IAV) H9N2在中显示出高传染潜力,并逃避人类的抗病毒反应. 这种蝙蝠H9N2病毒符合流行前流感菌株的关键标准.
科学领域:
- 病毒学 病毒学
- 动物传播疾病 动物传播疾病
- 公共卫生 公共卫生
背景情况:
- 亚型H9N2的A型流感病毒 (IAV) 在亚洲和中东的家禽中是特有的,导致人类感染的增加.
- 一种H9N2病毒于2017年首次从埃及水果蝙蝠 (Rousettus aegyptiacus) 中分离出来,引发了人们对其动物感染潜力的担忧.
研究的目的:
- 为了研究一种新型的哺乳动物适应蝙蝠H9N2流感A病毒的动物感染潜力.
- 评估蝙蝠H9N2.2的体外和体内感染和传播能力.
- 评估其逃避人类抗病毒机制的能力及其与人类流感菌株的抗原关系.
主要方法:
- 蝙蝠H9N2病毒序列的遗传学分析.
- 在体外研究中使用人类肺部扩展培养物.
- 在和MxA转基因小鼠中的体内研究.
- 对人类血清进行N2特异抗体的血清学分析.
主要成果:
- 蝙蝠H9N2在野中表现出高的复制和传播效率.
- 该病毒有效地感染了人类的肺部扩张培养物.
- 蝙蝠H9N2在小鼠中成功逃避了由人类MxA蛋白调解的抗病毒抑制.
- 在蝙蝠H9N2 N2和季节性人类菌株之间观察到较低的抗原相似性.
结论:
- 来自蝙蝠的H9N2流感A病毒具有显著的动物感染潜力.
- 它表现出流行前流感病毒的关键特征,包括高效的哺乳动物传播和免疫逃避.
- 需要进一步的监测和研究来监测这种新出现的威胁.
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