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一个小分子RAS模拟器破坏了RAS与效应蛋白的关联,以阻止信号传输
Sai Krishna Athuluri-Divakar1, Rodrigo Vasquez-Del Carpio1, Kaushik Dutta2
1Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA; Department of Structural and Chemical Biology, Icahn School of Medicine at Mount Sinai, 1425 Madison Avenue, New York, NY 10029, USA.
Cell
|April 23, 2016
概括
通过阻断与RAS结合域 (RBDs) 的相互作用来抑制癌症驱动的RAS信号传递. 这种干扰影响了RAS-RAF-MEK等关键途径,
科学领域:
- 癌症学
- 分子生物学
- 药物发现
背景情况:
- 在20%-30%的人类癌症中,RAS基因突变是常见的驱动因素.
- 在癌症治疗中,准RAS致癌蛋白是一个重大挑战.
- RAS信号依赖于通过RAS结合域 (RBD) 与效应蛋白的相互作用.
研究的目的:
- 作为RAS信号传递的潜在抑制剂,研究Rigosertib.
- 确定瑞戈塞尔提布如何影响RAS效应因子相互作用的机制.
- 探索瑞戈塞尔蒂布在破坏关键的致癌途径方面的有效性.
主要方法:
- 在实验室中使用styryl- benzyl sulfone进行研究.
- 对效应蛋白与RAS结合域 (RBDs) 的相互作用进行分析.
- 评估下游信号通路的抑制,包括RAS-RAF-MEK.
主要成果:
- 瑞格塞蒂布作为RAS模仿剂,与RAF激酶的RBD结合.
- 这种结合阻止了RAS与RAF的相互作用,抑制了RAF激活和RAS-RAF-MEK通路.
- 利格索尔提布还与Ral- GDS和PI3K的RBDs结合,表明更广泛的途径抑制.
结论:
- 通过向RBDs,Rigosertib有效抑制了RAS信号传递.
- 这种药物破坏了多种瘤信号通路,包括RAS-RAF-MEK,Ral-GDS和PI3K.
- 针对RBDs提供了对RAS驱动的癌症的有希望的治疗策略.
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