低GPX4通过可向的自适应性FSP1上调驱动TNBC中持续的耐药性持续状态
Nazia Chaudhary1, Dibita Mandal1, Bhagya Shree Choudhary1
1Advanced Centre for Treatment, Research, and Education in Cancer, Tata Memorial Centre, Navi Mumbai, 410210, India.
Redox biology
|September 19, 2025
概括
三重阴性乳腺癌细胞过渡到耐药性持续状态. 减少的谷氨过氧化酶-4 (GPX4) 驱动EMT和ferroptosis易感性,与FSP1/VIM预测糟糕的结果.
科学领域:
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
- 分子医学是分子医学.
背景情况:
- 在残留疾病的三阴性乳腺癌 (TNBC) 中转移性复发是一个主要的临床障碍.
- 了解TNBC细胞状态转换对于开发有效疗法至关重要.
研究的目的:
- 纵向建模TNBC亚型中从休眠耐药性持久性 (DDTP) 到增殖性 (PDTP) 的细胞状态过渡.
- 识别特征DTP状态的分子和表型变化及其在扩散后的维持.
- 研究谷氨过氧化酶-4 (GPX4) 和铁化在TNBC复发和化疗耐药性中的作用.
主要方法:
- 在TNBC亚型中细胞状态转换的纵向建模.
- 对休眠和增殖性耐药性持续性 (DTP) 细胞的分子和表型变化的分析.
- 评估谷氨过氧化酶-4 (GPX4) 表达及其与表皮细胞转化为介质细胞转化 (EMT) 标记物的相关性.
- 评价铁灭菌抑制蛋白-1 (FSP1) 和维丁 (VIM) 作为预测生物标志物和治疗点.
主要成果:
- TNBC DTP细胞表现出减少GPX4表达,促进EMT和ferroptosis易感性.
- 基本类PDTP获得了介酶特征;光线AR+TNBC DTP接受了部分EMT.
- GPX4下调与VIM相反相关,预测化疗治疗的TNBC患者的存活率.
- 抑制GPX4可以提高FSP1的调节,而FSP1高/VIM高的特征预测了低生存率和对化疗的反应.
- 向FSP1重新敏感化疗细胞;联合FSP1和GPX4抑制在PDTP TNBC细胞中诱导铁亡.
结论:
- 降低GPX4的调节是驱动EMT和TNBC DTP细胞中ferroptosis抵抗的一个关键机制.
- 在TNBC中,FSP1/VIM签名是治疗反应和生存的临床显著预测指标.
- 向FSP1和GPX4为克服化疗耐药性和预防TNBC复发提供了一个有希望的治疗策略.
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