人类乳头瘤病毒不能完全禁用p53细胞活动在HNSCC
bioRxiv : the preprint server for biology
|October 1, 2025
概括
即使在HPV阳性头癌中,野生型p53仍然具有瘤抑制活性,影响存活率并提供新的治疗点. 这挑战了在这些瘤中完全失活p53的观点.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 头部和部状细胞癌 (HNSCC) 是一个重要的全球健康问题.
- 在HNSCC中,p53失活是常见的事件,通过TP53突变或HPV介导的降解发生.
- 人类乳头瘤病毒阳性 (HPV+) HNSCC通常比HPV阴性HNSCC的结果更好,尽管p53的改变.
研究的目的:
- 研究野生型 (WT) p53在HPV+HNSCC中的作用和活性.
- 确定剩余的p53活性是否会影响瘤进展和患者的存活率.
- 确定与HPV+ HNSCC中的p53状态相关的潜在治疗漏洞.
主要方法:
- 基于HPV和TP53状态的生存结果,对人类瘤数据的分析.
- 在HPV+HNSCC细胞系中WT p53的实验性遗传切除.
- 转录组分析以评估p53-调节的基因表达.
- 对甲基化模式,染色体变异和PI3K-AKT信号通路的分析.
主要成果:
- 在HPV+ HNSCC中WT p53状态与与HPV+ TP53突变和HPV阴性病例相比显著更好的生存结果相关.
- 在HPV+HNSCC细胞中WT p53的遗传切除增加了增殖,迁移和入侵.
- 在HPV+ HNSCC中,p53继续调节基因表达,而WT p53状态与瘤抑制甲基化和抑制PI3K-AKT信号相关.
- 失去WT p53导致PI3K p110α增加,INPP5D减少,对PI3K抑制的敏感性增加.
结论:
- 这项研究挑战了HPV+HNSCC中完全无活化p53的概念,揭示了持续的瘤抑制p53功能.
- 剩余的WT p53活性在HNSCC病原和患者预后中起着至关重要的作用.
- TP53状态可能对对HPV+HNSCC患者进行分层治疗决定有价值,并建议PI3K通路抑制作为治疗策略.
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