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杜基因酶USP9X稳定了MCL1并促进了瘤细胞的存活
Martin Schwickart1, Xiaodong Huang, Jennie R Lill
1Department of Physiological Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, USA.
Nature
|December 22, 2009
概括
杜比基因酶USP9X稳定了MCL1,这是癌细胞生存的关键蛋白质. 抑制USP9X可能为治疗某些癌症,如淋巴瘤和多发性骨髓瘤提供新的治疗策略.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- MCL1对于干细胞和祖细胞的生存至关重要,但迅速降解.
- 淋巴瘤和白血病中异常的MCL1过度表达有助于化学抵抗和复发.
- 在癌症中驱动MCL1过度表达的机制在很大程度上仍然不清楚.
研究的目的:
- 研究USP9X在调节MCL1蛋白稳定性的作用.
- 为了确定USP9X是否是MCL1-依赖性恶性瘤的潜在治疗标.
主要方法:
- 研究了USP9X和MCL1.1之间的相互作用.
- 分析了USP9X对MCL1无化和蛋白质体降解的影响.
- 相关的USP9X表达与MCL1水平和患者预后在人类淋巴瘤和多发性骨髓瘤样本.
- 研究了USP9X敲击对BH3模仿型ABT-737.7对癌细胞敏感性的影响.
主要成果:
- USP9X直接与MCL1结合,并消除了标记降解的泛素链,从而稳定了MCL1.
- 增加USP9X表达与毛囊淋巴瘤和扩散大B细胞淋巴瘤中增加的MCL1蛋白水平相关.
- 多发性骨髓瘤患者的高USP9X表达表明预后不佳.
- 在接受ABT-737.7治疗时,USP9X的淘汰会导致MCL1泛化增加,降解增加,癌细胞死亡增加.
结论:
- USP9X稳定了MCL1,促进了癌细胞的存活,并导致多发性骨髓瘤的预后不佳.
- USP9X代表了MCL1依赖性癌症的新预后和治疗标.
- 德尤比基提纳酶可以稳定可变性瘤蛋白,突出显示它们在癌症发育和进展中的作用.
相关概念视频
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In this pathway, the target proteins are first tagged with small proteins called ubiquitin. This involves participation of a series of enzymes including— E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3 (ubiquitin...
The Proteasome
Eukaryotic cells can degrade proteins through several pathways. One of the most important amongst these is the ubiquitin-proteasome pathway. It helps the cell eliminate the misfolded, damaged, or unwarranted cytoplasmic proteins in a highly specific manner.
In this pathway, the target proteins are first tagged with small proteins called ubiquitin. A series of enzymes carry out the ubiquitination of the target proteins - E1 (ubiquitin-activating enzyme), E2 (ubiquitin-conjugating enzyme), and E3...
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These groups modify specific amino acids in a protein.
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