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Published on: December 14, 2016
Structure-activity relationship of natural and synthetic coumarin derivatives against Mycobacterium tuberculosis
Claudia Ta Pires1, Regiane Bl Scodro2, Diógenes Ag Cortez3,4
1Programa de Pós-Graduação em Biociências e Fisiopatologia, Universidade Estadual de Maringá, 87020-900 Maringá, Paraná, 87020-900, Brazil.
Abstract:
Aim: Eight coumarin derivatives (1a-h) obtained from natural (-)-mammea A/BB (1) and 13 synthetic coumarins (2-14) had their cytotoxicity and biological activity evaluated against Mycobacterium tuberculosis H37Rv reference strain and multidrug-resistant clinical isolates. Materials & methods: Anti-M. tuberculosis activity was evaluated by resazurin microtiter assay plate, and the cytotoxicity of natural and synthetic products using J774A.1 macrophages by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide. Results: Compounds 1g, 5, 6, 12 and 14 were more active against M. tuberculosis H37Rv and multidrug-resistant clinical isolates with MIC values ranging from 15.6 to 62.5 μg/ml. Conclusion: These results demonstrate that the coumarin derivatives were active against multidrug-resistant clinical isolates, becoming potential candidates to be used in the treatment of resistant tuberculosis.
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