向FGFR1通过mCRPC中的MAPK介导的BRCA2下调来增强olaparib敏感性
Jian Chen1, Jiarun Lai1, Yupeng Chen2
1Guangdong Provincial Key Laboratory of Urology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
Translational andrology and urology
|November 13, 2025
概括
纤维细胞生长因子受体1 (FGFR1) 信号维持BRCA2的表达,导致对PARP抑制剂的耐药性,如转移性割抵抗性前列腺癌 (mCRPC) 中的olaparib. 抑制FGFR1可以恢复对PARP抑制剂的敏感性.
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:
- 奥拉巴里布对具有同源复合修复 (HRR) 基因突变的转移性割抵抗性前列腺癌 (mCRPC) 有望,特别是BRCA2.
- 对PARP抑制剂的耐药性是一个临床挑战.
- 纤维细胞生长因子受体1 (FGFR1) 信号通常在mCRPC中被激活,但其在DNA修复调节中的作用尚不清楚.
研究的目的:
- 研究FGFR1信号是否影响BRCA2的表达.
- 确定FGFR1信号是否有助于抵抗PARP抑制剂.
主要方法:
- 对mCRPC数据集的综合性转录基因分析,以关联FGFR1和BRCA2表达.
- 在前列腺癌细胞系 (DU145,PC3) 中进行功能性测试 (敲击,抑制,过度表达).
- 在体外和体外模型评估FGFR1调制对olaparib敏感性,亡和扩散的影响.
- 基因组丰富分析 (GSEA) 用于识别FGFR1相关途径.
- 西方涂抹和途径抑制实验以阐明机制.
主要成果:
- 在mCRPC数据集中发现FGFR1和BRCA2表达之间存在强烈的正相关性.
- 抑制FGFR1 (遗传或药理) 在体外和体内显著降低了BRCA2表达和增强了olaparib敏感性.
- MAPK/ERK通路被确定为与BRCA2相关的FGFR1-下游通路,形成FGFR1-MAPK/ERK-BRCA2轴.
结论:
- FGFR1信号驱动一种依赖MAPK的机制,维持BRCA2的表达,导致对PARP抑制剂的耐药性.
- 在mCRPC中,FGFR1状态可以作为PARP抑制剂反应的预测生物标志物.
- 与PARP抑制剂结合向FGFR1可能是对BRCA2-依赖的mCRPC的可行策略.
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