一个HUWE1缺陷通过调节BRCA1-∆11q拼接变体导致PARP抑制剂耐药性
Stephen J Pettitt1, Nan Shao2, Diana Zatreanu2
1The CRUK Gene Function Laboratory, The Breast Cancer Now Toby Robins Research Centre, The Institute of Cancer Research, London, SW3 6JB, UK. Stephen.Pettitt@icr.ac.uk.
Oncogene
|July 26, 2023
概括
降低HUWE1水平增加BRCA1-∆11q,导致同源重组缺陷癌症中对PARP抑制剂 (PARPi) 的耐药性. 这一发现确定HUWE1是特定的BRCA1突变癌症中PARPi耐药性的潜在生物标志物.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- PARP 抑制剂 (PARPi) 是同源复合缺陷癌症的标准治疗方法.
- 对PARPi的耐药性,无论是新的还是获得的,都显著限制了治疗的有效性.
- 过度表达BRCA1-∆11q拼接变体是PARPi抗性的已知机制.
研究的目的:
- 阐明癌细胞实现BRCA1-∆11q表达增加的机制.
- 研究HUWE1在调节BRCA1-∆11q水平和PARPi耐药性的作用.
- 为了确定预测和克服PARPi耐药性的潜在生物标志物.
主要方法:
- 利用具有不同BRCA1突变的同源细胞系.
- 评估了HUWE1减少 (沉默) 对BRCA1-∆11q表达和PARPi敏感性的影响.
- 检查了RAD51核焦点和盐的抗性.
- 分析了PARPi抗性卵巢癌的临床病例中的HUWE1突变.
主要成果:
- 降低HUWE1水平导致BRCA1-∆11q表达和PARPi抵抗增加,特别是在能够表达BRCA1-∆11q的细胞中 (例如BRCA1外因子11突变细胞).
- 在相关的细胞模型中,HUWE1沉声恢复了RAD51核焦点和盐抗性.
- 在患有抗PARPi,BRCA1外因子11突变高度血清性卵巢癌的患者中发现了HUWE1催化域突变.
结论:
- 降低HUWE1水平为 elevated BRCA1-∆11q 和随后的 PARPi 抵抗提供了一个机制.
- HUWE1是PARPi耐药性的潜在预测生物标志物,需要进一步的临床研究.
- 涉及BRCA1突变的PARPi耐药性机制可能与存在的BRCA1突变类型特异.
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