Synthesis of novel andrographolide beckmann rearrangement derivatives and evaluation of their HK2-related anti-inflammatory activities
作者:Wang Wang、Yanli Wu、Kaiyin Yang、Canrong Wu、Ruotian Tang、Hua Li、Lixia Chen
DOI:10.1016/j.ejmech.2019.04.022
日期:2019.7
The preliminary structure-activity relationships (SARs) suggested that the formation of caprolactam of ring A and esterification of C-19-hydroxyl could improve the inhibitory effects on HK2 enzyme of andrographolide derivatives. Furthermore, compound 8h significantly reduced the levels of IL-1β and IL-6, down-regulated the expressions of iNOS and COX-2. Its anti-inflammatory effect was related to the
合成了两个系列的穿心莲内酯衍生物,通过贝克曼重排将酰胺部分引入环A。在系列1中,环A转化为己内酰胺,并且在系列2中将酰胺部分连接至环A的C-19。其中,化合物8h对HK2酶的活性具有明显的抑制作用(IC 50 = 9.36±0.08μM)和LPS诱导的RAW264.7细胞中NO的产生(IC 50 = 22.38±3.57μM),与HK2的有效结合亲和力(Kd = 5.12±0.82μM)。初步的构效关系(SARs)表明,环A的己内酰胺的形成和C-19-羟基的酯化可以改善穿心莲内酯衍生物对HK2酶的抑制作用。此外,化合物8h显着降低IL-1β和IL-6的水平,下调iNOS和COX-2的表达。其抗炎作用与抑制NF-κB途径和糖酵解酶HK2有关。由于HK2可能是抗发炎的新型有效靶标,因此化合物8h可能是针对HK2的新型抗炎药,或用作设计和合成更多具有更好发炎作用的HK2抑制剂的先导化合物。