依赖于DMT1的内分体-线粒体相互作用调节线粒体铁转位和转移性外生
Jonathan Barra1,2, Isaiah Crosbourne1, Cassandra L Roberge1
1Department of Molecular and Cellular Physiology, Albany Medical College, Albany, NY, 12208, USA.
Oncogene
|January 6, 2024
概括
双重金属载体1 (DMT1) 对于乳腺癌细胞中的铁运输至关重要,影响线粒体功能和转移. 沉默DMT1促进癌细胞的扩散,突出其在疾病进展中的作用.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生物化学
- 在瘤学瘤学.
背景情况:
- 早期的内分体 (EE) - 线粒体相互作用与线粒体铁运输有关,但潜在的机制仍然不清楚.
- 双重金属转运体1 (DMT1) 是一个关键蛋白质,参与细胞铁吸收.
研究的目的:
- 研究DMT1在线粒体铁转位中的作用及其对乳腺癌细胞行为的影响.
- 为了阐明EE-线粒体相互作用,铁运输和癌症转移之间的联系.
主要方法:
- 使用了三重阴性MDA-MB-231和发光性A T47D乳腺癌细胞系.
- 执行了DMT1静音,测量了性铁池 (LIP) 和PINK1/帕金因依赖性线粒的测试.
- 分析了线粒体的生物能量和蛋白质概况.
- 在2D和3D培养条件下进行了转录基因分析.
- 在人体和小鼠模型中进行了体内肺转移检测.
主要成果:
- 在MDA-MB-231细胞中,DMT1通过EE-线粒体相互作用维持线粒体铁转位,但不是T47D细胞.
- 静止DMT1增加了LIP水平,并在MDA-MB-231细胞中激活了PINK1/帕金因依赖性线粒.
- 线粒体功能和与铁相关的蛋白质被DMT1沉默改变了.
- 在2D和3D培养之间,转录形状显著不同.
- 在三阴性乳腺癌模型中,DMT1沉默促进了肺转移.
结论:
- 在三阴性乳腺癌中,DMT1在调节线粒体铁稳态和EE-线粒体相互作用方面发挥着关键作用.
- DMT1静音增强转移潜力,通过改变铁代谢和线粒细胞衰变.
- 环境背景显著影响DMT1调节在乳腺癌中的表型效应.
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