内体PIKfyve抑制如何防止病毒膜融合和进入病毒
Nicholas Chow1, Gustavo Scanavachi1,2,3, Anand Saminathan1,2
1Program in Cellular and Molecular Medicine, Boston Children's Hospital, 200 Longwood Ave, Boston, MA 02115, USA.
bioRxiv : the preprint server for biology
|December 15, 2025
概括
抑制PIKfyve酶会使内分体膨胀,阻断包裹病毒的进入和基因组的释放. 这种内分体胀会产生融合屏障,提供一种潜在的抗病毒策略来对抗使用这种入口途径的病毒.
科学领域:
- 病毒学 病毒学
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
背景情况:
- 包裹病毒利用宿主细胞膜融合进入细胞表面或内基体内.
- 内细胞病毒的进入通常需要低pH和蛋白酶初始化,从而影响病毒的热带性.
- 脂类激酶PIKfyve调节晚期内/溶体功能,其抑制会影响特定包裹病毒的感染.
研究的目的:
- 阐明PIKfyve抑制有选择性地阻断包裹病毒感染的机制.
- 为了确定晚期内分泌体/溶解体的胀是否足以阻碍病毒的进入.
- 调查观察到的抗病毒效应的生物物理基础.
主要方法:
- 使用阿皮利莫德和低压治疗来抑制PIKfyve并诱导内体胀.
- 采用活细胞3D晶格光片光显微镜来追踪病毒进入动态.
- 进行单细胞,单轮感染测定以量化传染性.
主要成果:
- PIKfyve抑制诱导的内分体胀阻断了融合和基因组释放,而不考虑脂质组成或贩运变化.
- 病毒的进入在晚期内体细胞阶段受到损害,即使内体细胞的酸度保持不变.
- 活细胞成像揭示了病毒在胀的内分泌体中积累的病毒,此前的融合停止.
结论:
- 晚期内分泌体/溶解体胀作为病毒融合和基因组释放的物理障碍.
- 这种独立于pH值或脂质变化的胀效应是PIKfyve抑制剂抗病毒活性的基础.
- 诱导内溶性体胀对依赖晚期内溶性体进入的病毒具有潜在的广泛抗病毒策略.
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