PI3K/Akt抑制通过p35-CDK5调节促进AR活性和前列腺癌细胞增殖
Wei-Hsiang Kao1, Kun-Yuan Chiu2, Stella Chin-Shaw Tsai3
1Department of Life Sciences, National Chung Hsing University, Taichung 40227, Taiwan; Translational Cell Therapy Center, China Medical University Hospital, Taichung 40447, Taiwan.
Biochimica et biophysica acta. Molecular basis of disease
|November 13, 2024
概括
在前列腺癌 (PCa) 中,抑制PI3K/Akt激活p35-CDK5,从而增强雄激素受体 (AR) 稳定性并促进细胞存活,揭示了抵抗机制.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 细胞信号传递 细胞信号传递
背景情况:
- 异常的PI3K/Akt信号驱动前列腺癌 (PCa) 恶性.
- 雄激素受体 (AR) 对于早期PCa发育至关重要.
- 之前已经证明p35-CDK5能够调解AR,STAT3和p21CIP1的修饰,促进PCa细胞的生长.
研究的目的:
- 研究p35-CDK5作为PCa中的PI3K/Akt和AR通路之间的联系的作用.
- 了解PCa细胞抵抗PI3K/Akt抑制的机制.
主要方法:
- 使用LNCaP和22Rv1前列腺癌细胞系.
- 使用PI3K/Akt抑制剂 (LY294002,Capivasertib/AZD5363) 和一个不活跃的Akt突变.
- 进行TCGA数据库分析和CDK5敲击实验.
- 研究了β-catenin/Egr1轴的作用.
主要成果:
- PI3K/Akt抑制显著增加了p35的表达,增强了AR的稳定性和PCa细胞中的激活.
- 抑制CDK5可以逆转PI3K/Akt抑制对AR和细胞活性的影响.
- β-catenin/Egr1轴与调节PI3K/Akt抑制和p35-CDK5激活有关.
- 在Akt抑制下,p35-CDK5在维持细胞活力方面发挥补偿作用.
结论:
- 抑制PI3K/Akt可以触发p35-CDK5依赖的AR激活,并促进PCa细胞活力.
- p35-CDK5作为一个关键的介质,将PI3K/Akt抑制与AR激活连接起来.
- 这突显了p35-CDK5作为PCa细胞对PI3K/Akt向疗法的抗性的一个关键因素.
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