致病性线粒体DNA突变抑制黑色素瘤转移
Spencer D Shelton1, Sara House1, Luiza Martins Nascentes Melo2
1Children's Medical Center Research Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
Science advances
|November 1, 2024
概括
线粒体DNA (mtDNA) 突变会影响癌症. 功能性mtDNA支持黑色素瘤生长和转移,而突变阻碍了瘤细胞的循环,并促进了对它们的选择.
科学领域:
- 癌症生物学 癌症生物学
- 线粒体遗传学 线粒体遗传学
- 黑色素瘤研究 黑色素瘤研究
背景情况:
- 线粒体DNA (mtDNA) 突变在癌症中很常见,但它们在瘤进展中的确切作用尚不清楚.
- 了解mtDNA对癌症生长和转移的影响对于开发向疗法至关重要.
研究的目的:
- 研究致病性mtDNA突变对黑色素瘤瘤生长,转移和细胞循环的功能影响.
- 建立具有不同mtDNA功能状态的同源性人类黑色素瘤细胞系.
主要方法:
- 开发了一种增强的细胞质混合 (cybrid) 生成协议.
- 创建了具有野生类型或病原性mtDNA的异构性黑色素瘤cybrid线,表现出不同的氧化酸化功能.
- 分析了瘤生长,自发转移,循环瘤细胞的丰富性,迁移,入侵和器官殖民.
主要成果:
- 具有致病性mtDNA的黑色素瘤混合体尽管氧化酸化受损,但形成了瘤.
- 致病性mtDNA变异减少了自发转移和循环瘤细胞,表明循环进入受损.
- 静脉注射后,致病性mtDNA没有抑制器官的殖民化.
- 单细胞分析显示,在异质细胞系的瘤生长过程中对致病性mtDNA进行选择.
结论:
- 功能性mtDNA在黑色素瘤生长过程中受到青.
- 由于mtDNA突变导致的线粒体功能障碍会损害转移进入血液中的转移.
- 致病性mtDNA在黑色素瘤进展过程中被选择,这凸显了功能性线粒体对癌症扩散的重要性.
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