Microbial transformation of 14-deoxy-11, 12-didehydroandrographolide and 14-deoxyandrographolide and inhibitory effects on nitric oxide production of the transformation products
作者:Li-Xia Chen、Yu-Lei Zhuang、Lan Shen、En-Long Ma、Hua-Jie Zhu、Feng Zhao、Feng Qiu
DOI:10.1016/j.molcatb.2011.06.012
日期:2011.11
Microbial transformations of 14-deoxy-11, 12-didehyclroandrographolide (a) and 14-deoxyandrographolide (b) were performed by Cunninghamella blakesleana (AS 3.970), respectively. Sixteen metabolites were obtained and their structures were elucidated by spectroscopic data analyses. Among these metabolites, 3 alpha, 12S, 19-trihydroxy-8(17), 9(11)-ent-labdadien-16, 15-olide (a7), 3-oxo-8 alpha, 17 beta-epoxy-14-deoxyandrographolide (b2). 3 alpha, 17. 19-trihydroxy-8, 13-ent-labdadien-16, 15-olide (b6), and 9 beta-hydroxy-14-deoxyandrographolide (b9) are new compounds. The configuration of C-12 in metabolite a7 was determined as S by GIAO method. The proposed metabolic pathways of 14-deoxy-11, 12-didehydroandrographolide and 14-deoxyandrographolide by C blakesleana were drawn. The inhibitory effects of these compounds on nitric oxide production in lipopolysaccaride-activated macrophages were evaluated and their preliminary structure-activity relationships (SAR) were discussed. (C) 2011 Elsevier B.V. All rights reserved.