Discovery of 5-(2′,4′-difluorophenyl)-salicylanilides as new inhibitors of receptor activator of NF-κB ligand (RANKL)-induced osteoclastogenesis
作者:Chia-Chung Lee、Fei-Lan Liu、Chun-Liang Chen、Tsung-Chih Chen、Deh-Ming Chang、Hsu-Shan Huang
DOI:10.1016/j.ejmech.2015.05.015
日期:2015.6
To improve the inhibitory potency of lead compound NDMC101 on RANKL-induced osteoclastogenesis, a series of new 5-(2′,4′-difluorophenyl)-salicylanilide derivatives were synthesized and evaluated for osteoclast inhibition by using TRAP-staining assay. Among them, both of compounds 6d and 6i showed three-fold increase in osteoclast–inhibitory activities compared to NDMC101 at half-inhibitory concentration
为了提高铅化合物NDMC101对RANKL诱导的破骨细胞形成的抑制作用,合成了一系列新的5-(2',4'-二氟苯基)-水杨酰苯胺衍生物,并通过TRAP染色法评估了破骨细胞的抑制作用。其中,在半抑制浓度下,与NDMC101相比,化合物6d和6i均显示出破骨细胞抑制活性增加了三倍。此外,机理研究表明6d和6i可以抑制RANKL诱导的破骨细胞生成相关基因,例如NFATc1,c-fos,TRAP和组织蛋白酶K。。通过包括对细胞核中NF-κB和NFATc1表达水平的特异性抑制,进一步证实了它们的抑制活性。此外,6d和6i还可以通过进行凹坑形成试验来显着减弱破骨细胞的骨吸收活性。因此,一类新的5-(2',4'-二氟苯基)-水杨基苯胺衍生物可以被认为是进一步开发抗吸收剂所必需的先导结构。