雄激素诱导的AR-BRD4转录调节复合物促进骨髓瘤细胞的恶性增殖
Jia-Ming Tian1, Yi-He Dong1, Zi Li1
1Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China.
Cell death discovery
|June 10, 2025
概括
涉及BRD4和雄激素受体 (AR) 的雄激素信号传递驱动骨髓瘤 (OS) 细胞的增殖. 抑制BRD4可降低AR相关基因表达和OS瘤生长,揭示了这种依赖激素的癌症的治疗标.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 内分泌学 在内分泌学.
背景情况:
- 骨髓瘤 (OS) 是一种依赖激素的瘤.
- 将荷尔蒙与OS进展联系在一起的特定分子机制仍未得到充分探索.
研究的目的:
- 研究特定分子和激素在骨髓瘤进展中的相互作用.
- 确定关键的分子参与者和参与激素驱动的OS发展的途径.
主要方法:
- 多重复合免疫组织化学 (IHC) 在组织微阵列 (TMA) 上.
- 生物信息学分析和GEO数据库挖掘.
- 在体外细胞培养和体内小鼠异种移植模型.
- 染色体免疫沉测序 (ChIP测序) 和双化酶记者测定.
主要成果:
- 在OS组织中,BRD4和性类固醇受体 (AR,ERβ) 呈阳性表达.
- BRD4和AR表达正相关,特别是在骨质细胞亚型中.
- DHT刺激上调了AR和BRD4,促进了OS细胞的增殖.
- DHT增加了BRD4染色体结合和AR重叠,形成了一个AR-BRD4复合体,增强了AR基因转录 (例如,PLCB4).
- 用 (+) -JQ1抑制BRD4,降低AR相关基因表达,并在体内抑制OS瘤生长.
结论:
- 由雄激素诱导的BRD4表达升高,有助于OS中AR介的转录调节.
- 这种AR-BRD4调节复合物有助于骨髓瘤的恶性进展.
- 向BRD4为荷尔蒙依赖性骨髓瘤提供了一个潜在的治疗策略.
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