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Hongming Ma¹, Arthur S Kim^1,2, Natasha M Kafai^1,2

¹Department of Medicine, Washington University School of Medicine, St Louis, MO, USA.

|November 19, 2020

概括

科学家发现低密度脂蛋白受体A类含域3 (LDLRAD3) 对委内瑞拉马脑炎病毒 (VEEV) 感染至关重要. 针对LDLRAD3提供了对抗这种危险的α病毒的新策略.

科学领域:

病毒学
免疫学
遗传学

背景情况:

委内瑞拉马脑炎病毒 (VEEV) 是一种由蚊子传播的阿尔法病毒,导致严重的脑炎和死亡.
由于气溶传播和缺乏有效的对策, VEEV 构成了生物防御风险.
导致VEEV进入和感染的宿主因素尚不清楚.

研究的目的:

为了确定VEEV进入和感染的重要宿主因素.
探索对抗VEEV的潜在治疗目标.

主要方法:

在宿主细胞中进行全基因组CRISPR-Cas9选.
在神经细胞中的LDLRAD3基因编辑.
VEEV粒子结合和内部化试验.
使用Ldlrad3缺乏的小鼠进行体内研究.

主要成果:

低密度脂蛋白受体A类含域3 (LDLRAD3) 被确定为VEEV受体.
LDLRAD3促进了VEEV的附着和进入宿主细胞.
在VEEV感染中,LDLRAD3域1至关重要.
在小鼠中,LDLRAD3 缺乏消除了 VEEV 病原体.
一种LDLRAD3 ((D1) - Fc融合蛋白阻断了VEEV感染和疾病.

结论:

LDLRAD3是VEEV感染的关键宿主因子.
针对LDLRAD3是一个有前途的治疗策略.
基于LDLRAD3域1的诱受体融合蛋白提供了对VEEV的潜在对策.

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