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通过病毒反意义转录AST的异位表达抑制HIV-1转录和潜伏逆转

Rui Li¹, Kaveh Daneshvar², Xinjie Ji³

¹Department of Molecular and Comparative Pathobiology, Johns Hopkins School of Medicine, Baltimore, MD, USA.

Science advances

|May 9, 2025

概括

艾滋病毒-1反感应转录 (AST) 通过促进闭合染色质状态来强制病毒延迟. 在CD4+T细胞中异胎AST表达阻止了HIV的重新激活,为HIV治愈提供了潜在的机会.

科学领域:

病毒学病毒学
分子生物学分子生物学
免疫学免疫学免疫学

背景情况:

调节HIV-1潜伏的机制仍然不完全理解.
之前的研究确定了HIV-1反感应转录 (AST) 参与通过表观遗传修饰抑制病毒转录.
艾滋病毒-1潜伏期对实现对艾滋病毒-1感染的功能治愈构成重大障碍.

研究的目的:

研究AST在维持抗逆转录病毒疗法患者CD4+T细胞中的HIV-1潜伏期中的作用.
确定AST内部负责其延迟促进活动的特定领域和动机.
发现与AST相互作用并促进HIV-1抑制的宿主因素.

主要方法:

艾滋病毒-1感染者的CD4+T细胞中AST的宫外表达.
使用药理学和T细胞受体激素的ex vivo刺激测定来评估病毒活性.
分析AST的结构域和序列图案.
无偏见的蛋白质查,以识别AST相互作用体.

主要成果:

宫外 AST 表达抑制了 CD4+ T 细胞在刺激时的 HIV-1 反激活,有效地防止了延迟逆转.
特定的结构域和AST的序列模式被确定为其延迟强制功能的关键.
蛋白质组分析揭示了已知和新型宿主因子,这些因子与AST相互作用以抑制HIV-1的表达.

结论:

艾滋病毒-1反意义转录 (AST) 是一种能够强制执行艾滋病毒-1潜伏的新生物分子.
通过保持病毒延迟,AST显示出作为治疗剂的潜力,可以通过维持病毒延迟来实现对HIV-1的功能治疗.
针对AST及其相互作用宿主因子可能为HIV-1根除提供新的策略.

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