通过HIF-1α对KSHV感染的特定阶段调节
See-Chi Lee1, Minhchau To1, Bernadett Papp1,2,3,4,5
1Department of Oral Biology, College of Dentistry, University of Florida, Gainesville, Florida, USA.
Journal of virology
|March 10, 2026
概括
低氧诱导的卡波西肉瘤相关疹病毒 (KSHV) 感染是可逆的,并且取决于HIF-1α表达的时间. 通过PRC2进行表观遗传沉默,防止HIF-1α在延迟建立后诱导lytic基因.
科学领域:
- 病毒学 病毒学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 细胞应激反应的应激反应
背景情况:
- 卡波西的肉瘤相关性疹病毒 (KSHV) 通常会导致潜在的感染.
- 身体压力,如缺氧,可以影响KSHV感染动态.
- 转录因子HIF-1α调节细胞对缺氧的反应.
研究的目的:
- 为了研究低氧和HIF-1α定时对KSHV溶性感染的影响.
- 确定表观遗传修饰在压力下调节KSHV光性基因表达中的作用.
- 探索针对表观遗传抑制剂的潜在治疗策略.
主要方法:
- KSHV感染的细胞培养模型.
- 操纵低氧状态和HIF-1α表达的情况.
- 对病毒基因表达和促进体结合的分析.
- 评估KSHV基因组的异染色体化.
- 抑制表观遗传抑制剂PRC2.2. 的抑制.
主要成果:
- 缺氧诱导的KSHV性感染是可逆的,如果缺氧停止,则会导致流产.
- 只有在感染后的前24小时内,HIF-1α才能促进菌感染 (hpi).
- 在异性染色化之前,HIF-1α在感染早期与病毒促进体结合.
- 在延迟建立后,PRC2抑制会恢复HIF-1α诱导lytic基因的能力.
- HIF-1α对病毒促进体的影响取决于其相对于KSHV延迟建立的表达时间.
结论:
- HIF-1α表达的时间和持续时间对于驱动KSHV溶性感染至关重要.
- 通过KSHV的DNA异染色体化,对HIF-1α介导的性基因激活产生了抗性.
- PRC2在静止KSHV临床基因表达后延迟过程中发挥着关键作用.
- 这些发现提供了关于卡波西肉瘤瘤中KSHV病原和潜伏维护的见解.
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