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, USA.
Science advances
|November 12, 2025
概括
人类免疫缺陷病毒1型 (HIV-1) 组合蛋白 Gag 控制病毒蛋白酶活性,以防止 CARD8.8 进行免疫传感. 这种机制增强了受感染的CD4+T细胞的存活率和病毒适应性.
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.
- 艾滋病毒-1蛋白酶 (PR) 激活是可以触发免疫反应的关键步骤.
- 含有卡斯帕斯招募域的蛋白8 (CARD8) 作为PR活动的传感器.
研究的目的:
- 为了研究HIV-1 Gag如何调节公关活动.
- 确定Gag在抑制CARD8炎症酶激活中的作用.
- 探索Gag突变对病毒健康和免疫规避的影响.
主要方法:
- 使用了HIV-1 Gag突变体,其组装或释放域被破坏.
- 评估了PR活动和CARD8炎症酶激活.
- 测量了互白素-1β (IL-1β) 分泌和热细胞死亡.
- 分析了HIV-1 MA和p6.6中的宿主适应性突变.
主要成果:
- 组合或释放域的破坏导致过早的PR激活和CARD8炎症酶激活.
- 这种过早的激活导致IL-1β分泌和热细胞死亡.
- 艾滋病毒-1 MA和p6的宿主适应性突变以PR-依赖的方式增强了CD4+T细胞存活率,可能涉及CARD8调节.
结论:
- 艾滋病毒-1 蛋白积极控制PR激活,以逃避CARD8感知.
- 通过口腔中介抑制PR活动对于防止先天性免疫激活至关重要.
- 病毒的聚集和释放机制是HIV-1免疫逃避和病变的关键决定因素.
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