RNAi 查识别了 Brd4 作为急性髓性白血病的治疗点
Johannes Zuber1, Junwei Shi, Eric Wang
1Cold Spring Harbor Laboratory, 1 Bungtown Road, Cold Spring Harbor, New York 11724, USA.
Nature
|August 5, 2011
概括
研究人员确定含有odomain 4 (Brd4) 是急性髓性白血病 (AML) 的关键调节剂. 用JQ1抑制Brd4显示出显著的抗白血病作用,向癌症干细胞,并提供了一个有前途的治疗策略.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 癌症生物学 癌症生物学
- 血液学 血液学 血液学
背景情况:
- 癌细胞对瘤基因表达的表观遗传调节器进行操纵.
- 向表观遗传途径是有希望的,但由于对癌症特异性依赖的不完全理解,受到限制.
- 急性髓性白血病 (AML) 通常具有异常的染色质状态.
研究的目的:
- 使用无偏见的查方法识别AML的表观遗传脆弱性.
- 调查染色体调节剂在AML疾病维持中的作用.
- 评估针对已识别的漏洞的治疗潜力.
主要方法:
- 在AML小鼠模型中选针对染色体调节者的小发针RNAs (shRNAs).
- 利用小分子抑制剂JQ1来抑制含有代蛋白4 (Brd4) 的小分子抑制剂.
- 在体外和体内评估抗白血病效应,包括对白血病干细胞和人类AML样本的影响.
主要成果:
- 含有odomain的4 (Brd4) 被确定为AML维持的关键.
- 使用shRNAs或JQ1抑制Brd4,诱导出强大的抗白血病效应和终端骨髓分化.
- 通过抑制MYC表达,JQ1在各种人类AML亚型中表现出广泛的活性.
结论:
- 用像JQ1这样的小分子准Brd4代表了AML的一个有前途的治疗策略.
- Brd4抑制提供了一种抑制癌症MYC瘤基因的方法.
- 查RNA干扰 (RNAi) 对于发现药物开发中的表观遗传漏洞是有效的.
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