抑制HDAC6改变了烟酸酸酶的活性和线粒体结构
Andrew Roe1, Catríona M Dowling2, Cian D'Arcy1
1Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland.
Nature communications
|July 28, 2025
概括
基斯脱乙酶6 (HDAC6) 调节癌细胞中的烟酸酸酶 (FH) 活性. 抑制HDAC6会改变线粒体结构并促进细胞死亡,这表明针对瘤代谢的新策略.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 酸酸酶 (FH) 是一种关键的线粒体酶和瘤抑制剂.
- 尽管FH在瘤发生中的作用,但其调节的过程尚不清楚.
研究的目的:
- 为了研究基因组脱乙酶6 (HDAC6) 在调节FH活动中的作用.
- 探索针对HDAC6作为癌症治疗策略的潜力.
主要方法:
- 利用活细胞超分辨率STED纳米镜和电子显微镜观察线粒体结构.
- 采用质谱免疫沉法来识别HDAC6相互作用体.
- 使用3D-STORM超高分辨率显微镜可视化HDAC6-FH相互作用.
- 应用13C葡萄糖标签来跟踪代谢变化.
主要成果:
- 抑制或淘汰HDAC6改变了线粒体晶状体结构,并在三阴性乳腺癌细胞中释放了线粒体DNA.
- FH被确定为HDAC6.6的关键线粒体相互作用体.
- 抑制HDAC6增加了与FH的相互作用,导致烟酸积累,蛋白质吞和细胞死亡.
结论:
- 在瘤细胞中,HDAC6调节内源性FH活动.
- 抑制HDAC6是一种有前途的方法,可以间接向瘤代谢.
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