E2F1-3激活梅克尔细胞多细胞病毒早期转录和复制
Nicholas J H Salisbury1, Supriya Patil-Amonkar1, Ann Roman1,2
1Fred Hutchinson Cancer Center, Human Biology Division, Seattle, WA, 98109, USA.
bioRxiv : the preprint server for biology
|November 26, 2025
概括
默克尔细胞多细胞瘤病毒 (MCPyV) 大型和小型瘤抗原 (LT,ST) 表达是由与病毒NCCR结合的E2F转录因子控制的. 这揭示了对病毒复制和默克尔细胞癌 (MCC) 的发展至关重要的反循环.
科学领域:
- 病毒学 病毒学
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 默克尔细胞多细胞病毒 (MCPyV) 导致默克尔细胞癌 (MCC).
- 大型和小型瘤抗原 (LT,ST) 驱动病毒复制和瘤发生.
- 对MCPyV LT/ST表达的控制机制尚不清楚.
研究的目的:
- 阐明控制MCPyV LT/ST表达的监管机制.
- 研究E2F转录因子在MCPyV早期基因调节中的作用.
- 了解对病毒复制和MCC病变发生的影响.
主要方法:
- 使用共识E2站点,确定了与MCPyV非编码控制区域 (NCCR) 结合的E2F1-3/DP1.
- 使用E2位点删除和小分子抑制剂来阻止E2F-NCCR相互作用.
- 在MCC和转染细胞中评估LT/STmRNA和蛋白质表达.
主要成果:
- E2F1-3/DP1二聚体在特定的E2位点与MCPyV NCCR结合.
- 抑制E2F-NCCR结合会抑制MCPyV LT/ST的表达.
- 在相关的多种病毒中确定了类似的E2位点,这表明了保存的调节机制.
结论:
- 发现了一个E2F/LT/RB1正反循环,这对于MCPyV复制和MCC扩散至关重要.
- 质疑PyV LT驱动S阶段进入的模型;相反,S阶段进入刺激PyV早期转录.
- 通过E2F介导的调节是相关多种病毒中保存的机制.
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