Synthesis and biological evaluation of novel spin labeled 18β-glycyrrhetinic acid derivatives
摘要:
Eighteen novel spin-labeled 18 beta-glycyrrhetinic acid (GA) derivatives were designed, synthesized, and evaluated for cytotoxicity against four human tumor cell lines (A-549, DU-145, KB and KBvin). Most of the derivatives showed more significant cytotoxicity than that of the parent compound GA. The best compound, 6j, with a tryptophan amino moiety and piperidine nitroxyl radical showed GI(50) values of 13.7-15.0 mu M, and was fivefold more potent than GA. In a mechanism of action study, compound 7a was confirmed as a 20S proteasome inhibitor in both in vitro and cell-based assays. These findings support further optimization efforts based on 18 beta-GA as a lead compound to develop potential anticancer drug candidates. (C) 2012 Elsevier Ltd. All rights reserved.
Synthesis and Antiviral Activity of Amino-Acid Conjugates of Glycyrrhetic Acid
作者:L. A. Baltina、M. V. Khudobko、L. R. Mikhailova、L. A. Baltina、V. A. Fedorova、Ya. A. Orshanskaya、V. V. Zarubaev、O. I. Kiselev
DOI:10.1007/s10600-014-0990-0
日期:2014.7
Conjugates of glycyrrhetic acid (GLA) with amino acids (L-isoleucine, -leucine, -valine, and -phenylalanine) were synthesized by the acid-chloride method using methyl or tert-butyl esters of the acids. Tests in MDCK cell culture showed that the GLA conjugate with phenylalanine exhibited high antiviral activity against influenza A/H1N1/pdm09 virus (ED50 = 4.4 μg/mL, SI = 161).
Synthesis and biological evaluation of novel spin labeled 18β-glycyrrhetinic acid derivatives
作者:Yingqian Liu、Keduo Qian、Chih-Ya Wang、Chin-Ho Chen、Xiaoming Yang、Kuo-Hsiung Lee
DOI:10.1016/j.bmcl.2012.10.041
日期:2012.12
Eighteen novel spin-labeled 18 beta-glycyrrhetinic acid (GA) derivatives were designed, synthesized, and evaluated for cytotoxicity against four human tumor cell lines (A-549, DU-145, KB and KBvin). Most of the derivatives showed more significant cytotoxicity than that of the parent compound GA. The best compound, 6j, with a tryptophan amino moiety and piperidine nitroxyl radical showed GI(50) values of 13.7-15.0 mu M, and was fivefold more potent than GA. In a mechanism of action study, compound 7a was confirmed as a 20S proteasome inhibitor in both in vitro and cell-based assays. These findings support further optimization efforts based on 18 beta-GA as a lead compound to develop potential anticancer drug candidates. (C) 2012 Elsevier Ltd. All rights reserved.