在内分泌抵抗性雌激素受体阳性乳腺癌中的代谢开关
Heather M Brechbuhl1, Amy Han1, Kiran Vinod Paul1
1Department of Medicine, Division of Medical Oncology, University of Colorado Denver Anschutz Medical Campus, Aurora, Colorado USA.
bioRxiv : the preprint server for biology
|January 7, 2025
概括
丁甲基烟酸 (DMF) 可以通过纠正代谢中断,特别是TCA循环中,恢复对耐受性雌激素受体阳性乳腺癌的内分泌疗法的敏感性,如他莫西芬和富尔韦斯特兰特. 这种方法为克服内分泌抵抗提供了一个新的策略.
科学领域:
- 在瘤学瘤学.
- 代谢途径 代谢途径
- 乳腺癌研究 乳腺癌研究
背景情况:
- 内分泌抵抗是治疗雌激素受体阳性 (ER+) 乳腺癌的一个主要障碍.
- 代谢重编程是内分泌抵抗的一个关键驱动因素,是潜在的治疗标.
- 了解保存的代谢变化及其对ERDNA结合的影响,对于有效的治疗策略至关重要.
研究的目的:
- 调查新陈代谢重编程在ER+乳腺癌内分泌抵抗中的作用.
- 评估二甲基烟酸 (DMF) 作为一种潜在的药物,可以恢复对他莫西芬 (Tam) 和富尔韦斯兰特 (Fulv) 的敏感性.
- 阐明代谢变化如何影响耐药细胞中的雌激素受体 (ER) DNA结合模式.
主要方法:
- 从六个ER+乳腺癌细胞系中生成了抗他莫西芬 (TamR) 和抗富尔韦斯坦 (FulvR) 的细胞系.
- 进行了代谢分析,RNA测序,蛋白质组学和CUT&RUN测试,以表征代谢和分子变化.
- 评估DMF在逆转抗性,恢复三碳酸 (TCA) 循环功能的有效性,并重新建立ER DNA结合模式.
主要成果:
- 耐药细胞显示TCA循环活动中断,谷氨减少,核酸/氨基酸代谢发生变化.
- DMF治疗恢复了TCA循环中间体,逆转了TamR和FulvR细胞的抗性,并调节了氨酸通路酶.
- DMF恢复了TamR细胞中的ER DNA结合模式,使它们对他莫西芬重新敏感,但在没有恢复父母结合签名的情况下调节了FulvR细胞中的ER-辅因子相互作用.
结论:
- 代谢重编程显著影响ER+乳腺癌中的ERDNA结合活性和抵抗机制.
- 针对代谢漏洞,如TCA循环中断的DMF等药物,可以重新编程ER信号,克服抵抗.
- 这项研究提供了关于内分泌抵抗性乳腺癌的代谢适应的宝贵多组数据,增强了对ER功能改变的理解.
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