生物信息学
伊马替尼
虚拟筛选
体外
化学
受体酪氨酸激酶
药物发现
酪氨酸激酶
效力
突变
原癌基因蛋白质c-kit
抗药性
药理学
激酶
生物化学
生物
癌症研究
受体
遗传学
基因
髓系白血病
造血
干细胞因子
干细胞
作者
Hossam Nada,Sungdo Kim,Sreenivasulu Godesi,Joohan Lee,Kyeong Lee
标识
DOI:10.1080/07391102.2022.2164061
摘要
c-Kit is a receptor tyrosine kinase which is involved in intracellular signaling and mutations of c-Kit have been associated with various types of cancers. Investigations have shown that inhibition of c-Kit, using tyrosine kinase inhibitors, yielded promising results in cancer treatment marking it as a promising target for cancer therapy. However, the emerging resistance for the current therapy necessitates the development of more potent inhibitors which are not affected by these mutations. Herein, virtual screening of a library of natural-based compounds yielded three hits (2, 5 and 6) which possessed nanomolar inhibitory (2.02, 4.33 and 2.80 nM, respectively) activity when tested in vitro against c-Kit. Single point mutation docking studies showed the hits to be unaffected by the most common resistance mutation in imatinib-resistant cells, mutation of Val654. Although, the top hits exhibited around 3000 higher inhibitory potency toward c-Kit when compared to imatinib (5.4 µM), previous studies have shown that they are metabolically unstable. Fragment-based drug design approaches were then employed to enhance binding affinity of the top hit and make it more metabolically stable. Screening of the generated fragments yielded a new derivative, F1, which demonstrated stronger binding affinity, stability and binding free energy when compared to the hit compound 2.Communicated by Ramaswamy H. Sarma
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