在PARP抑制剂治疗的前列腺癌细胞中,M1C调解LINE-1转录
Keisuke Shigeta1, Shinkichi Takamori2, Hiroki Ozawa2
1Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA; Department of Urology, Keio University School of Medicine, Tokyo, Japan.
Cancer letters
|February 14, 2026
概括
致癌的M1C蛋白通过激活逆转移子驱动割抵抗性前列腺癌 (CRPC) 的进展和对PARP抑制剂的耐药性. 向M1C可能会改善使用PARP抑制剂的CRPC治疗.
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:
- 先进的抵抗割的前列腺癌 (CRPC) 显示对PARP抑制剂的反应,但只有当同源重组 (HR) 有缺陷时.
- 众所周知,致癌的M1C蛋白驱动CRPC进展.
- 对于M1C在对PARP抑制的反应中的作用尚不清楚.
研究的目的:
- 研究M1C蛋白在HR-competentCRPC细胞对PARP抑制的反应中的作用.
- 阐明M1C影响耐药性和基因组不稳定性的分子机制.
主要方法:
- 用Olaparib.治疗HR-合格的CRPC细胞.
- 对M1C表达,ATM表达,KAP1酸化和STING激活的分析.
- 量化LINE-1 (L1) 和HERV-K逆转移素的转录和蛋白质.
- 对APOBEC3 (A3) 基因表达的评估.
主要成果:
- 奥拉巴里布治疗诱导HR-competentCRPC细胞中的M1C.
- M1C驱动ATM表达,KAP1酸化,STING激活,以及随后的L1逆转移子的减压.
- M1C对于激活L1和HERV-K逆转子和APOBEC3基因至关重要,导致基因组不稳定性和olaparib耐药性.
- M1C激活HERV-K基因和HERV-K ENV蛋白的表达.
结论:
- M1C通过激活L1和HERV-K逆转移体和APOBEC3基因,在HR-competentCRPC中中介于对PARP抑制剂的耐药性的关键作用.
- M1C是克服CRPC中PARP抑制剂耐药性的潜在治疗标.
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