在HIV-1组装过程中逃避CARD8激活
Ivy K Hughes1, James B Hood1, Andrés A Quiñones-Molina1
1Department of Virology, Immunology, & Microbiology, Boston University Chobanian & Avedisian School of Medicine, Boston, MA 02118.
bioRxiv : the preprint server for biology
|June 6, 2025
概括
艾滋病毒-1组件由Gag多蛋白协调,以防止过早的蛋白酶活性,逃避CARD8炎症酶. 宿主适应性突变有助于HIV-1逃避细胞死亡,影响人类的病毒进化.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 像HIV-1这样的病毒在复制过程中必须逃避宿主天生的免疫力.
- CARD8炎症酶作为细胞压力和病原体活动的传感器.
- 病毒组合和蛋白酶活性是HIV-1生命周期中的关键步骤.
研究的目的:
- 为了研究HIV-1 Gag多蛋白组合如何调节病毒蛋白酶活性.
- 确定CARD8炎症酶激活对HIV-1复制的反应中的作用.
- 阐明HIV-1适应以逃避宿主免疫传感器 (如CARD8.8) 的机制.
主要方法:
- 使用了具有改变组装和芽域的HIV-1口腔突变 (MA,NC,p6).
- 评估过早的蛋白酶活性和CARD8炎症酶激活.
- 分析了MA和p6中的宿主适应性突变对它们对病毒聚集和免疫逃避的影响.
主要成果:
- 干扰Gag组装/芽生长域导致过早的蛋白酶激活和CARD8炎症酶参与,导致IL-1β分泌和热.
- 在HIV-1 MA (M30K) 和p6 (PTAP复制) 中发现了特定的宿主适应突变,以调节组装和芽,以逃避CARD8介导的细胞死亡.
- HIV-1 Gag组件直接抑制PR活动,以防止CARD8传感器激活.
结论:
- 艾滋病毒-1口腔组合是控制病毒蛋白酶活性的关键调节器,以逃避CARD8介导的先天免疫传感.
- 艾滋病毒-1的宿主适应性突变反映了逃避CARD8的进化压力,影响了人类的病毒适应性和病原性.
- 这项研究揭示了HIV-1在动物传播后对人类CARD8的适应及其对病毒进化的影响.
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