Synthesis and antitumour activity of glycyrrhetinic acid derivatives
作者:Stefan Schwarz、René Csuk
DOI:10.1016/j.bmc.2010.08.054
日期:2010.11
Glycyrrhetinicacid (GA) is one of many interesting triterpenoic acids showing anticancerogenic potential. GA is known to trigger apoptosis in tumour cell lines, although GA has a low cytotoxicity. In our study we were able to prepare derivatives of GA that show lowered the IC50 values as determined by a sulforhodamine B (SRB) assay using 15 different human tumour cell lines. Thus, combining an ester
all the de-protected (without Boc group) derivatives showed much stronger cytotoxic activity than GA, and surprisingly enough, all the GN series of the compounds were more potent than GO series against various tumor cells. Among them, the compound 26 (amide linkages in C-3 position) exhibited stronger antitumor activity against A549 cell line (IC50 = 2.109 ± 0.11 μM) than the positive drug cisplatin (IC50 = 9