组织素甲基转移酶SETD2调节HIV的表达和潜伏时间
Cameron R Bussey-Sutton1, Airlie Ward2,3, Joshua A Fox2,3
1Department of Biochemistry, UNC Chapel Hill, Chapel Hill, North Carolina, United States of America.
PLoS pathogens
|June 7, 2024
概括
抑制SETD2,沉积H3K36三甲基化 (H3K36me3),影响人类免疫缺陷病毒 (HIV) 的整合和表达. 这种表观遗传修饰影响病毒延迟和重新激活,为艾滋病毒治愈策略提供了新的目标.
科学领域:
- 表观遗传学和病毒延迟
- 分子病毒学分子病毒学
- 染色体生物学 染色体生物学
背景情况:
- 了解艾滋病毒的表达和潜伏时间对于开发有效的艾滋病毒疗法至关重要.
- SETD2 基因组甲基转移酶及其产物H3K36三甲基化 (H3K36me3) 与基因调节有关.
- 在HIV生命周期中SETD2和H3K36me3的确切作用在很大程度上仍未被探索.
研究的目的:
- 研究SETD2和H3K36me3在调节HIV整合,表达和潜伏中的作用.
- 确定SETD2抑制对病毒基因表达和艾滋病毒潜伏期确定的影响.
- 探索针对SETD2的潜在治疗策略,以消除艾滋病毒.
主要方法:
- 使用一种强效和选择性的SETD2抑制剂 (EPZ-719) 来防止H3K36me3沉积在HIV感染细胞中.
- 在初级CD4T细胞中使用CRISPR/Cas9介导的SETD2淘汰.
- 进行了转录基因分析,并分析了艾滋病毒整合部位的分布.
- 评估病毒RNA拼接和潜伏HIV对HDAC抑制剂的反应.
主要成果:
- 抑制SETD2降低了整合后的病毒基因表达,并加速了潜伏感染细胞的出现.
- 由于SETD2的枯竭,HIV的整合部位从活跃转录的基因转移到静止和多抑制的染色体区域.
- 抑制SETD2并没有影响HIVRNA水平,但适度减少了病毒RNA剪接,这表明了转录后调节.
- 暴露于EPZ-719增强了HDAC抑制剂vorinostat的潜伏HIV的重新激活.
结论:
- SETD2和H3K36me3是HIV整合,表达和潜伏的新型调节者.
- 向SETD2影响HIV染色体的整合和表观遗传状态,影响病毒的持久性.
- 这些发现表明,像SETD2这样的表观遗传修饰剂可能是艾滋病毒治愈策略的有价值目标,特别是在组合疗法中.
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