突变的p53可以保护三阴性乳腺腺癌免受体内ferroptosis
Denada Dibra1, Shunbin Xiong1, Sydney M Moyer1,2
1Department of Genetics, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.
Science advances
|February 14, 2024
概括
突变TP53蛋白质保护三阴性乳腺癌 (TNBC) 细胞免受细胞死亡途径铁亡. 突变TP53的损失会触发铁亡,揭示TNBC中的依赖性.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症遗传学 癌症遗传学
背景情况:
- 在三阴性乳腺癌 (TNBC) 中,TP53突变很常见,并且与瘤的攻击性有关.
- 在TP53中错觉突变是观察到的最常见的变化.
研究的目的:
- 调查TNBC对突变p53.3的生理依赖性.
- 确定突变p53影响瘤细胞存活的机制.
主要方法:
- 利用了基因工程小鼠模型的本土TNBC与诱导突变p53.
- 采用热点p53突变 (p53R172H,p53R245W) 的遗传删除,并分析了铁灭诱导.
- 进行单细胞转录组分析以确定涉及的分子通路.
主要成果:
- 删除突变的p53热点触发了TNBC瘤中的铁亡.
- 发现突变p53可以保护癌细胞免受铁灭诱导因素的影响.
- 由突变的p53对Mgst3和Prdx6的NRF2-依赖调节被确定为对铁亡的关键保护机制.
结论:
- 突变p53在保护TNBC细胞免受ferroptotic死亡方面发挥着至关重要的作用.
- 针对突变的p53-NRF2-过氧化酶轴可能是TNBC的治疗策略.
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