生物钟的分子成分调节HIV-1复制的时间
Helene Borrmann1, Görkem Ulkar1, Anna E Kliszczak1
1Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK.
iScience
|August 3, 2023
概括
这项研究揭示了身体的内部时钟或昼夜节律会影响人类免疫缺陷病毒1 (HIV-1) 的复制. 这一发现可能会导致针对HIV-1感染的新型基于时间的治疗方法.
科学领域:
- 病毒学 病毒学
- 时间生物学 时间生物学
- 分子生物学分子生物学
背景情况:
- 人类免疫缺陷病毒1 (HIV-1) 是一个重大的全球健康挑战,目前还没有治愈或疫苗.
- 循环节律,身体的内部日常循环,对于协调对环境变化和病原体的反应至关重要.
- 观察到周边HIV-1病毒载荷的日间变化,但驱动这种节律性的机制尚不清楚.
研究的目的:
- 研究细胞内在的昼夜时钟在调节HIV-1复制中的作用.
- 阐明HIV-1病毒载量的日间变化背后的分子机制.
主要方法:
- 利用昼夜同步系统研究HIV-1复制.
- 采用基因沉默技术来研究昼夜激活剂Bmal1.1的作用.
- 进行了染色体免疫沉测定,以检测BMAL1与HIV-1促进体结合.
- 分析了核受体REV-ERB和ROR与HIV长端重复的结合.
- 进行生物信息分析以确定昼夜调节的宿主因素.
主要成果:
- 证明细胞内在时钟调节节律性HIV-1复制.
- 表明沉默Bmal1取消了HIV-1的节奏复制.
- 已确认BMAL1与HIV-1促进体结合.
- 揭示了REV-ERB和ROR与HIV长端重复在不同昼夜时间的差异性结合.
- 确定了参与HIV-1复制的宿主因素的昼夜调节.
结论:
- 昼夜时钟在调节HIV-1复制方面发挥着重要作用.
- BMAL1及其相关的核受体 (REV-ERB,ROR) 是HIV-1转录的时间调节中的关键组成部分.
- 宿主因子的循环调节为节律性病毒复制提供了额外的控制层.
- 了解这些昼夜机制可以为针对HIV-1的新,基于时间的治疗策略铺平道路.
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