区别病毒性和宿主特异性适应区域区别的人类衍生波瓦桑病毒血统2菌株
Rachel E Lange1,2, Julia C Pritchard3, Anna S Jaeger3
1Arbovirus Laboratory, Wadsworth Center, New York State Department of Health, Slingerlands, New York.
概括
来自纽约和明尼苏达州的Powassan病毒 (POWV) 菌株表现出明显的毒性. 纽约菌株导致小鼠死亡率更高,这表明地理差异影响POWV.
科学领域:
- 病毒学 病毒学
- 流行病学 流行病学
- 遗传学 是一个遗传学.
背景情况:
- 波瓦桑病毒 (POWV) 是一种在北美和俄罗斯流行的传播的黄状病毒.
- Ixodes scapularis的传播POWV,在美国东北部和中西部地区的点.
- 在纽约和明尼苏达州出现了不同的POWV遗传群.
研究的目的:
- 描述第一个地理上独特的,当代人类Powasan病毒分离物.
- 确定POWV菌株的表型变异性和遗传分歧.
- 调查遗传分歧对POWV毒性的影响.
主要方法:
- 两种人类POWV菌株 (DTV MN-PV320和DTV NY21-027) 的隔离和遗传特征.
- 在体外和体内研究以评估菌株适应性和毒性.
- 在一个易受感染的小鼠模型中对POWV菌株进行比较分析.
主要成果:
- 两种分离的POWV菌株都在Ixodes scapularis中表现出类似的适应性.
- 与明尼苏达菌株 (DTV MN-PV320) 相比,纽约菌株 (DTV NY21-027) 在POWV小鼠模型中诱导了更高的死亡率.
- 确定了关键氨基酸替代物,包括纽约菌株中的I2173L,并与神经系统感染有关.
结论:
- 波瓦桑病毒菌株的地理差异可能导致人类不同的致病潜力.
- 菌株特定的遗传变异会影响POWV的毒性.
- 需要进一步的研究来了解POWV遗传多样性的临床影响.
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