佳能BAF复合体调节了人类T细胞急性淋巴细胞白血病的致癌程序
Kazunari Aoki1, Mizuki Hyuga1,2, Yusuke Tarumoto1
1Stem Cell Genetics, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan.
Blood
|November 3, 2023
概括
正规的BRG1/BRM相关因子 (cBAF) 综合体调节T细胞急性淋巴细胞白血病 (T-ALL) 细胞迁移和增殖. 抑制cBAF会影响白血病细胞的生长和存活,这表明它是治疗点.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 急性白血病细胞依赖于骨髓的微环境 () 才能生存和繁殖.
- 精确调节白血病细胞-利基相互作用仍然不完全理解.
研究的目的:
- 阐明调控白血病细胞与利基的相互作用的调控机制.
- 确定T细胞急性淋巴细胞白血病 (T-ALL) 的新型治疗点.
主要方法:
- 全基因组的CRISPR屏幕用于识别调控因素.
- 研究了正规的BRG1/BRM相关因子 (cBAF) 综合体的作用.
- 对染色质可访问性,转录因子结合 (RUNX1) 和基因表达 (CXCR4,CDK6) 的分析.
- 在T-ALL异种移植模型中验证.
主要成果:
- cBAF调节T-ALL细胞向位因子CXCL12的迁移.
- cBAF维持了RUNX1与CXCR4增强剂结合的染色质可访问性,控制了迁移.
- 抑制cBAF导致RUNX1驱逐,CXCR4下调,迁移受损,增殖减少 (通过CDK6) 和亡增加.
- 在T-ALL异种移植模型中证实了抗癌作用.
结论:
- 在T-ALL中,cBAF是RUNX1驱动的白血病程序的关键调节者.
- cBAF控制T-ALL细胞向CXCL12迁移以及细胞自主生长.
- 抑制cBAF显示出显著的抗癌作用,将其定位为T-ALL.的有希望的治疗标.
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