在FOXM1转录程序中的随机变化介导复制应激耐受性
Hendrika A Segeren1, Kathryn A Wierenga1, Frank M Riemers1,2
1Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, The Netherlands.
Molecular oncology
|February 26, 2025
概括
患有瘤基因诱导的复制应激 (RS) 的癌细胞依赖于检查点. 部分FOXM1抑制保护了DNA损伤,并改善了药物诱导RS的恢复,揭示了新的治疗点.
科学领域:
- 分子生物学分子生物学
- 癌症生物学 癌症生物学
- 基因组学就是基因组学.
背景情况:
- 瘤基因诱导的复制应激 (RS) 是癌症的关键脆弱性.
- 在S相内检查点抑制剂 (例如ATR,CHK1) 面临药物耐药性.
- 大量样本分析阻碍了对瘤异质性和抵抗机制的理解.
研究的目的:
- 在复制压力 (RS) 和CHK1抑制下对癌细胞的转录组进行表征.
- 在瘤性RAS表达细胞中识别药物耐受性的机制.
- 调查FOXM1及其点在药物耐药性中的作用.
主要方法:
- 细胞内免疫染与单细胞RNA测序相结合.
- 在CHK1抑制剂和凝胺治疗下对瘤性RAS表达细胞的分析.
- 基因淘汰实验 (FOXM1,UBE2C,MKI67) 的研究结果.
主要成果:
- 确定了37个药物耐受性和敏感细胞之间的差异性表达基因,包括FOXM1点.
- 部分FOXM1敲击保护细胞免受DNA损伤,并改善药物诱导RS的恢复.
- 对FOXM1目标基因UBE2C和MKI67的抑制也减轻了DNA损伤.
结论:
- 在S和G2阶段,低水平的FOXM1-依赖基因表达可以在药物诱导的RS过程中防止过度的DNA损伤.
- 在复制应激反应中,FOXM1及其向基因 (UBE2C,MKI67) 起着至关重要的作用.
- 这些发现表明,在癌症治疗中,针对FOXM1的新疗法战略.
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