由CDK12无活化诱导的MYC信号导致对拼接酶SRPK1的依赖
Jing Liang1, Aishwarya Gondane1, Harri M Itkonen1
1Department of Biochemistry and Developmental Biology, Faculty of Medicine, University of Helsinki, Helsinki, Finland.
Molecular oncology
|May 22, 2024
概括
前列腺癌中CDK12的损失驱动MYC活动,从而产生对SRPK1.1的依赖. 药物Endovion针对CDK12失活的癌细胞中的这种脆弱性.
科学领域:
- 分子生物学分子生物学
- 癌症生物学 癌症生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 循环素依赖性激酶12 (CDK12) 失活定义了一种侵袭性前列腺癌 (CRPC) 的侵袭性亚型.
- 超激活MYC转录因子可以诱导CRPC表型.
研究的目的:
- 调查CDK12无活化,MYC活动和CRPC中SRPK1的依赖之间的联系.
- 评估Endovion (SCO-101) 作为一种针对CDK12失活CRPC细胞的SRPK1抑制剂.
主要方法:
- 研究了CDK12损失对MYC活性和前列腺癌细胞中SRPK1依赖性的影响.
- 在患者样本中分析了MYC表达和SRPK1水平.
- 使用药理学 (Endovion,SRPIN340) 和遗传学方法评估SRPK1抑制的疗效.
- 评估了SRPK1抑制对新生的转录和未折叠蛋白质反应的影响.
主要成果:
- CDK12无活化促进MYC活动,导致CRPC细胞中的SRPK1依赖.
- 高MYC表达与患者样本中SRPK1水平增加相关.
- 过度表达MYC使前列腺癌细胞对SRPK1抑制产生敏感性.
- 认定Endovion (SCO-101) 是一种SRPK1抑制剂,它对SRPIN340对转录的影响进行了复制.
- 抑制SRPK1增强了转录延长,并激活了未折叠的蛋白质反应.
结论:
- 在CRPC中,CDK12无活化驱动MYC信号以SRPK1依赖的方式传递.
- 临床级化合物Endovion通过抑制SRPK1.1,选择性地向具有CDK12失活的CRPC细胞.
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