数字农科院2.0

Newcastle disease virus acquires phosphatidylserine through the budding process to enhance infectivity

文献类型： 外文期刊

作者： Yuechi Hou;Lei Tan;Ping Zhang;Dandan Zhang;Libin Chen;Xusheng Qiu;Yingjie Sun;Cuiping Song;Ying Liao;Tao Ren;Chan Ding

作者机构：

关键词： apoptosis mimicry;NDV;phosphatidylserine;scramblase;TMEM16F

期刊名称： Virulence

ISSN： 2150-5608

年卷期： 2025 年 16 卷 1 期

页码：

收录情况： SCIE（2025版）

摘要： Newcastle disease, a highly contagious avian illness caused by the Newcastle disease virus (NDV), inflicts substantial economic losses upon the global poultry industry. While NDV is known to enter host cells via multiple pathways, critical aspects of its infection and pathogenic mechanisms, particularly the role of host lipids, remain incompletely understood. Here, we demonstrate that NDV infection strategically manipulates host phosphatidylserine (PS) metabolism to enhance its replication cycle. We found that the NDV hemagglutinin-neuraminidase (HN) protein triggers an elevation in intracellular Ca2+ levels, which in turn activates the host phospholipid scramblase TMEM16F. This activation leads to the externalization of PS to the outer leaflet of the plasma membrane. Consequently, NDV virions budding from these PS-rich membrane domains acquire a PS-enriched envelope. Mass spectrometry analysis confirmed high PS abundance on the viral surface. These PS-decorated progeny virions then engage host cell PS receptors, specifically the receptor tyrosine kinase TYRO3 and T-cell immunoglobulin and mucin domain-containing receptor 4 (TIM-4), to facilitate enhanced viral adsorption and entry. This process, known as "apoptotic mimicry," represents a novel, parallel entry pathway for NDV. These findings provide new mechanistic insights into NDV-host interactions and identify the PS scrambling and recognition axis as a potential therapeutic target for developing novel anti-NDV strategies.

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