Improved inhibitory activities against tumor-cell migration and invasion by 15-benzylidene substitution derivatives of andrographolide.

Abstract In the present study, andrographolide (Andro, 1) derivatives were screened to identify potent inhibitors against tumor-cell migration and invasion, and associated structure–activity relationships were studied. Compared to 1 , compounds 8a – 8d exhibited more potent activities against migration in SGC-7901, PC-3, A549, HT-29 and Ec109 cell lines. Improved activities against tumor-cell migration and invasion were proved to be associated with the down-regulation of MMPs.