在恶性瘤中驱动蛋白质组不平衡会引起蛋白质组灾难,并赋予瘤抑制
bioRxiv : the preprint server for biology
|March 16, 2026
概括
热冲击因子1 (HSF1) 在癌细胞中保持蛋白质稳定性. 破坏HSF1会导致蛋白质灾难,导致瘤抑制,并提供一种新的癌症治疗策略.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 蛋白质组学是指蛋白质组学.
背景情况:
- 蛋白质组不稳定性在癌症中的作用尚不清楚,与基因组不稳定性不同.
- 热冲击因子1 (HSF1) 调节蛋白质毒性应激反应和蛋白质组稳定性.
- 在各种癌症中,HSF1被认为是显著的瘤促进因子.
研究的目的:
- 研究HSF1在维持癌细胞内的蛋白质稳定性中的作用.
- 探索HSF1缺乏对蛋白质完整性和细胞活力的后果.
- 阐明在癌症治疗中诱导蛋白质组灾难的治疗潜力.
主要方法:
- 利用了神经纤维素瘤I型 (NF1) 缺陷的恶性外围神经瘤 (MPNST) 细胞和非转化的人类施万细胞.
- 在HSF1耗尽后评估蛋白质多基化和聚合.
- 研究了JNK和mTORC1通路在应对HSF1缺陷中的参与.
- 在MPNST和黑色素瘤模型中评估瘤抑制.
主要成果:
- 在MPNST细胞中,HSF1的枯竭诱导了蛋白质聚合和氨基二代,与Schwann细胞不同.
- HSF1保护线粒体的陪伴者HSP60免受粉样类寡合体的影响.
- MPNST细胞激活了JNK以抑制mTORC1和蛋白质翻译,减轻蛋白质失衡.
- 刺激mTORC1加剧了蛋白质组失衡和细胞死亡,证明了瘤抑制.
结论:
- HSF1对于维持癌细胞蛋白质稳定性和启用诸如mTORC1.1.这样的致癌途径至关重要.
- 通过向HSF1诱导蛋白质灾难,为癌症提供了一个有希望的下一代治疗策略.
- 向蛋白质组不稳定性为癌症治疗提供了一种新的方法,特别是在依赖HSF1的恶性瘤中.
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