通过将全与ATP结合部位抑制剂结合起来,准Bcr-Abl
Jianming Zhang1, Francisco J Adrián, Wolfgang Jahnke
1Dana-Farber Cancer Institute, Harvard Medical School, Department of Cancer Biology, Seeley G. Mudd Building 628, Boston, Massachusetts 02115, USA.
Nature
|January 15, 2010
概括
研究人员开发了GNF-5,一种性抑制剂,向Bcr-Abl myristate结合部位. 将GNF-5与ATP竞争性药物的结合克服了耐药性,显示了治疗Bcr-Abl驱动癌症的前景.
科学领域:
- 在瘤学瘤学.
- 药理学 药理学是指药理学的学科.
- 结构生物学 结构生物学
背景情况:
- 对ATP结合部位抑制剂的耐药性是治疗Bcr-Abl阳性癌症的一个主要挑战.
- 菌抑制剂提供了一种潜在的策略,以克服现有的抵抗机制.
研究的目的:
- 描述全性BCR-Abl抑制剂GNF-2的结合机制.
- 为了评估GNF-5的疗效,GNF-2模拟物,与ATP竞争性抑制剂对抗抗性Bcr-Abl突变的组合.
主要方法:
- 溶液NMR和X射线晶体学以确定GNF-2结合部位和结构效应.
- 位点定向的突变发生和-交换质谱学 (HDX-MS) 用于结构动力学.
- 在体外生化和细胞测试,包括针对T315I突变的测试.
- 在小鼠骨髓移植模型中的体内疗效研究.
主要成果:
- GNF-2 结合到 Abl 的 myristate 结合部位,从而诱导 ATP 结合部位的结构变化.
- 结合伊马替尼或尼洛替尼,GNF-5在体外预防了耐药性突变.
- 组合疗法显示对T315I Bcr-Abl突变的添加活性.
- 在临床前模型中,GNF-5在体内证明了对T315I突变的有效性.
结论:
- 向米里沙特结合部位的抑制剂为Bcr-Abl.提供了一个可行的治疗策略.
- 结合全和ATP竞争性抑制剂有效克服对Bcr-Abl向疗法的耐药性.
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