作者:Verónica Calcatierra、Óscar López、José G. Fernández-Bolaños、Gabriela B. Plata、José M. Padrón
DOI:10.1016/j.ejmech.2015.02.037
日期:2015.4
A series of isosteric phenolic thio- and selenosemicarbazones have been obtained by condensation of naturally-occurring phenolic aldehydes and thio(seleno)semicarbazides. Title compounds were designed as potential multi-target drugs, and a series of structure-activity relationships could be established upon their in vitro assays: antioxidant activity, alpha-glucosidase inhibition and antiproliferative activity against six human tumor cell lines: A549 (non-small cell lung), HBL-100 (breast), HeLa (cervix), SW1573 (non-small cell lung), T-47D (breast) and WiDr (colon). For the antiradical activity, selenium atom and 2 or 3 phenolic hydroxyl groups proved to be essential motifs; remarkably, the compound with the most potent activity, with a trihydroxyphenyl scaffold (EC50 = 4.87 +/- 1.57 mu M) was found to be stronger than natural hydroxytyrosol, a potent antioxidant present in olive oil (EC50 = 13.80 +/- 1.41 mu M). Furthermore, one of the thiosemicarbazones was found to be a strong non-competitive inhibitor of alpha-glucosidase (K-i = 9.6 +/- 1.6 mu M), with an 8-fold increase in activity compared to acarbose (K-i = 77.9 +/- 11.4 mu M), marketed for the treatment of type-2 diabetes. Most of the synthesized compounds also exhibited relevant antiproliferative activities; in particular, seleno derivatives showed GI(50) values lower than 6.0 mu M for all the tested cell lines; N-naphthyl mono- and dihydroxylated derivatives behaved as more potent antiproliferative agents than 5-fluorouracil or cisplatin. (C) 2015 Elsevier Masson SAS. All rights reserved.