Synthesis and in vitro biological evaluation of dihydroartemisinyl-chalcone esters
摘要:
A series of dihydroartemisinyl-chalcone esters were synthesized through esterification of chalcones with dihydroartemisinin (DHA). The hybrids were screened against chloroquine (CQ) sensitive (3D7) and CQ resistant (W2) strains of intraerythrocytic Plasmodium falciparum parasites, and were all found to be active, with IC50 values ranging between 1.5 and 11 nM against both strains, with SI values over 5800. The esters featuring oxygenated aryl rings (7,10 and 11), were found to be equipotent to DHA, but were 2-3 times more active than artesunate against the 3D7 and W2 strains of the malaria parasites. They were also screened in vitro against a panel of three cancer cell lines consisting of TK-10, UACC-62 and MCF-7. Compound 7, bearing a furan ring, displayed the most potent overall antitumor activity against all three cancer cell lines. TGA revealed that the targeted hybrids were all thermally more stable than DHA, which may be beneficial to the high temperature storage conditions that prevail in malaria endemic countries. During this study, ester 7 was identified as the best candidate for further investigation as a potential drug in search for new, safe and effective antimalarial drugs. (C) 2014 Elsevier Masson SAS. All rights reserved.
A chalcone derivative binds a putative allosteric site of YopH: Inhibition of a virulence factor of Yersinia
作者:Ana C.A. de Souza、Mattia Mori、Larissa Sens、Ruth F. Rocha、Tiago Tizziani、Luiz F.S. de Souza、Louise Domeneghini Chiaradia-Delatorre、Maurizio Botta、Ricardo J. Nunes、Hernán Terenzi、Angela C.O. Menegatti
DOI:10.1016/j.bmcl.2020.127350
日期:2020.8
Identification of allosteric inhibitors of PTPs has attracted great interest as a new strategy to overcome the challenge of discover potent and selective molecules for therapeutic intervention. YopH is a virulence factor of the genus Yersinia , validated as an antimicrobial target. The finding of a second substrate binding site in YopH has revealed a putative allosteric site that could be further exploited. Novel chalcone compounds that inhibit PTPs activity were designed and synthesized. Compound 3j was the most potent inhibitor, interestingly, with different mechanisms of inhibition for the panel of enzymes evaluated. Further, our results showed that com- pound 3j is an irreversible non-competitive inhibitor of YopH that binds to a site different than the catalytic site, but close to the well-known second binding site of YopH.
Synthesis and in vitro biological evaluation of dihydroartemisinyl-chalcone esters
作者:Frans J. Smit、Riëtte A. van Biljon、Lyn-Marie Birkholtz、David D. N'Da
DOI:10.1016/j.ejmech.2014.11.016
日期:2015.1
A series of dihydroartemisinyl-chalcone esters were synthesized through esterification of chalcones with dihydroartemisinin (DHA). The hybrids were screened against chloroquine (CQ) sensitive (3D7) and CQ resistant (W2) strains of intraerythrocytic Plasmodium falciparum parasites, and were all found to be active, with IC50 values ranging between 1.5 and 11 nM against both strains, with SI values over 5800. The esters featuring oxygenated aryl rings (7,10 and 11), were found to be equipotent to DHA, but were 2-3 times more active than artesunate against the 3D7 and W2 strains of the malaria parasites. They were also screened in vitro against a panel of three cancer cell lines consisting of TK-10, UACC-62 and MCF-7. Compound 7, bearing a furan ring, displayed the most potent overall antitumor activity against all three cancer cell lines. TGA revealed that the targeted hybrids were all thermally more stable than DHA, which may be beneficial to the high temperature storage conditions that prevail in malaria endemic countries. During this study, ester 7 was identified as the best candidate for further investigation as a potential drug in search for new, safe and effective antimalarial drugs. (C) 2014 Elsevier Masson SAS. All rights reserved.
Carboxylated chalcones and related flavonoids as inhibitors of xanthine oxidase
作者:Oleksandr L. Kobzar、Alona V. Tatarchuk、Galyna P. Mrug、Svitlana P. Bondarenko、Bohdan A. Demydchuk、Mykhaylo S. Frasinyuk、Andriy I. Vovk
DOI:10.1007/s00044-023-03109-8
日期:2023.8
9-homoisoflavonoid and flavone scaffolds also showed micromolar activity towards xanthine oxidase. At the same time, dihydrochalcone and Δ2,3-homoisoflavonoid carboxylic acids as well as their oxa-analogues were more than two orders of magnitude less effective inhibitors. Kinetic and molecular docking studies indicated that the carboxylated chalcones and Δ3,9-homoisoflavonoids are mixed-type inhibitors