在内分泌抵抗期间,雌激素受体α动力学和可塑性
Aswathy Sivasailam1,2, Kiran S Kumar1, Aparna Geetha Jayaprasad1
1Cancer Research Program, BRIC-Rajiv Gandhi Centre for Biotechnology, Poojappura, Thycaud P.O., Thiruvananthapuram, Kerala, 695014, India.
Biology direct
|June 13, 2025
概括
雌激素受体α (ERα) 的可塑性有助于乳腺癌异质性和对内分泌疗法的耐药性. 了解这些细胞机制对于改善ERα阳性乳腺癌治疗结果至关重要.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 细胞生物学 细胞生物学
背景情况:
- 乳腺癌根据激素受体 (HR) 和HER2状态被分为亚型.
- 具有ERα阳性的乳腺癌患者经常对内分泌疗法产生耐药性,导致转移.
- 在治疗压力下,时空变化和ERα损失是显著的临床挑战.
研究的目的:
- 研究乳腺癌细胞中ERα可塑性和异质性的基础机制.
- 了解ERα表达如何在对内分泌治疗的反应中发生变化.
- 探索ERα在瘤进展和治疗耐药性的作用.
主要方法:
- 工程设计的三阴性乳腺癌细胞来表达EGFP-ERα,用于活细胞成像.
- 分析ERα表达的变化,以应对4-胺和内氧.
- 利用RNA测序来识别受ERα调节的信号通路.
- 在2D和3D培养中使用细胞周期指标探针评估ERα表达异质性.
主要成果:
- 实验室内耐药性与ERα下调相关;然而,初始内分泌治疗上调了ERα,可能是通过蛋白酶体或自途径.
- 抑制自和蛋白质酶增强ERα表达.
- RNA测序显示,ERα调节了泛素,蛋白酶体通路,细胞增殖和未折叠的蛋白质反应 (UPR).
- 在2D和3D培养中,以细胞周期阶段独立的方式观察到ERα表达异质性.
结论:
- 这项研究证实了内在的转录后机制驱动ERα可塑性.
- 在内分泌治疗期间,ERα可塑性可能会导致受体异质性和瘤进展.
- 为了治疗的发展,需要对这些机制进行进一步的研究.
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