Extending the structure−activity relationship study of marine natural ningalin B analogues as P-glycoprotein inhibitors
作者:Chao Yang、Iris L.K. Wong、Kai Peng、Zhen Liu、Peng Wang、Tingfu Jiang、Tao Jiang、Larry M.C. Chow、Sheng Biao Wan
DOI:10.1016/j.ejmech.2016.09.070
日期:2017.1
In the present study, a total of 25 novel ningalin B analogues were synthesized and evaluated for their P-gp modulating activity in a P-gp overexpressed breast cancer cell line LCC6MDR. Preliminary structure-activity study shows that A ring and its two methoxy groups are important pharmacophores for P-gp inhibiting activity. Among all derivatives, 23 is the most potent P-gp modulator with EC50 of 120–165 nM
在本研究中,总共合成了25种新的宁格灵B类似物,并评估了它们在过表达P-gp的乳腺癌细胞LCC6MDR中的P-gp调节活性。初步的结构活性研究表明,A环及其两个甲氧基是抑制P-gp活性的重要药效团。在所有衍生物中,23是最有效的P-gp调节剂,在逆转紫杉醇,DOX,长春碱和长春新碱的抗性方面,EC 50为120-165 nM。与维拉帕米相比,选择指数至少大于606相对安全。机理研究表明,化合物23通过抑制P-gp的转运活性来逆转P-gp介导的耐药性,从而恢复细胞内药物的积累。总而言之,我们的研究表明,宁格灵B类似物23是一种无细胞毒性且有效的P-gp化学增敏剂,可在将来用于逆转P-gp介导的临床癌症药物耐药性。