多瘤病毒ALTOs,但不是MTs,通过激活NF-κB通路来降低病毒早期基因表达的调节
Nicholas J H Salisbury1, Supriya Amonkar1, Joselyn Landazuri Vinueza1,2
1Fred Hutchinson Cancer Center, Pathogen-Associated Malignancies Integrated Research Center, Seattle, WA, 98109 USA.
bioRxiv : the preprint server for biology
|June 3, 2024
概括
默克尔细胞多瘤病毒替代LT ORFs (ALTOs) 通过激活NF-κB信号和降低病毒转录来作为瘤抑制剂. 抑制MCPyV ALTO对默克尔细胞癌的发展至关重要.
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:
- 多种病毒,包括默克尔细胞多种病毒 (MCPyV),编码瘤抗原 (LT,ST,MT,ALTOs),影响病毒复制和癌症.
- MCPyV的替代LT ORF (ALTO) 在病毒生命周期和瘤发生中的作用仍然不清楚.
研究的目的:
- 研究MCPyV ALTO在病毒复制和瘤发生中的作用.
- 确定MCPyV ALTO影响细胞信号传递和病毒转录的机制.
主要方法:
- 在MCC细胞中进行功能测试,以评估ALTO对细胞生长和信号传递的影响.
- 对ALTO与SQSTM1和TRAF2&3.3相互作用的生物化学分析.
- NF-κB激活测定和病毒早期转录调节的分析.
主要成果:
- MCPyV ALTO作为瘤抑制剂,在默克尔细胞癌 (MCC) 中被静止.
- ALTO表达诱导增长停止并通过N-终端激活区域 (NTAR1+2) 激活NF-κB信号.
- 激活的NF-κB降低了MCPyV早期转录的调节;在其他多重瘤病毒ALTO中保存的NTAR动机调节了类似的效果.
结论:
- MCPyV ALTO抑制病毒复制并促进延迟,因此需要对MCC发展进行沉默.
- ALTOs作为病毒抑制剂进化,与MTs形成鲜明对比,它们对NF-κB的激活是这一功能的关键.
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