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内部化A型流感病毒的近距离标签揭示了新原蛋白在病毒吸收中的作用

Milagros Sempere Borau¹, Victor G Gisbert², Josephine von Kempis¹

¹Institute of Medical Virology, University of Zurich, Zurich, Switzerland.

|July 7, 2025

概括

研究人员确定了neogenin (Neo1) 作为一种新型受体,用于A型流感病毒 (IAV) 的入口. Neo1促进了IAV的内部化,其枯竭减少了病毒复制,突出显示了它在IAV感染中的作用.

科学领域:

病毒学病毒学
细胞生物学细胞生物学
免疫学免疫学免疫学

背景情况:

A型流感病毒 (IAV) 构成了全球健康的重大威胁.
IAV的进入依赖于血凝素与酸的结合以及随后的受体相互作用.
介导IAV内部化的特定宿主细胞受体在很大程度上仍未确定.

研究的目的:

为了识别参与IAV输入的宿主细胞受体.
研究epsin 1在IAV内部化中的作用.
描述neogenin (Neo1) 作为一个潜在的IAV受体.

主要方法:

在IAV输入过程中使用近距离标记来识别epsin 1的互动组.
RNA干扰 (RNAi) 抑制肺细胞中的Neo1表达.
原子力显微镜测量Neo1-IAV结合亲和力.
同焦显微镜评估Neo1和IAV的同定位.

主要成果:

作为免疫球蛋白超级家族成员的Neogenin (Neo1),被确定为epsin 1相互作用因子和IAV受体候选物.
Neo1 knockdown 显著减少了 H1N1,H2N2 和 H5N1 IAV 菌株的复制.
重组Neo1证明了与IAV的高亲和度结合 (KD为21±14nM).
Neo1与传入的IAV同定位,并影响了病毒的进入.

结论:

新生素 (Neo1) 作为宿主细胞受体,促进流感A病毒的内部化.
Neo1代表了减少IAV感染的潜在治疗点.

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