Synthesis and anti-Mycobacterium tuberculosis activity of imide-β-carboline and carbomethoxy-β-carboline derivatives
作者:Mariana Aparecida Lopes-Ortiz、Manuela Ribeiro Panice、Eduardo Borges de Melo、João Paulo Ataide Martins、Vanessa Pietrowski Baldin、Cláudia Terêncio Agostinho Pires、Katiany Rizzieri Caleffi-Ferracioli、Vera Lúcia Dias Siqueira、Regiane Bertin de Lima Scodro、Maria Helena Sarragiotto、Rosilene Fressatti Cardoso
DOI:10.1016/j.ejmech.2019.111935
日期:2020.2
A series of methyl beta-carboline carboxylates (2a-g) and of imide-O-carboline derivatives containing the phthalimide (4a-g), maleimide (5b, g) and succinimide (6b, e, g) moiety were synthesized, and evaluated for their activity against Mycobacterium tuberculosis H(37)Rv. The most active beta-carboline derivatives against the reference strain were assayed for their cytotoxicity and the activity against resistant M. tuberculosis clinical isolates. Farther, structure-activity relationship (SAR) studies were carried out using the three and four-dimensional approaches for starting to understand the way of beta-carboline activity in M. tuberculosis. All 19 beta-carboline derivatives were assayed, firstly, by determining the minimum inhibitory concentration (MIC) using resazurin microtiter assay plate (REMA) in M. tuberculosis H 37 Rv. Then, five derivatives (2c, 4a, 4e, 4g, 6g), which showed MIC <= 125 mu g/mL, were assayed in nine resistant M. tuberculosis clinical isolates (five MDR, three isoniazid monoresistant and one isoniazid plus streptomycin resistant). The MIC values against the resistant clinical isolates ranged from 31.25 to >250 mu g/mL. All five derivatives were non-cytotoxic to the VERO cell line, determined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide, at the tested concentration (selectivity index ranged from <1.74 to 14.4). Our study demonstrated that (2c) and (6g) derivatives had better antiM. tuberculosis activity, especially against resistant clinical isolates, what makes them scaffold candidates for further investigations about their anti-tuberculosis activity. The SAR study conducted with the 19 beta-carboline derivatives showed the importance of steric effects for the synthesized beta-carbolines against M tuberculosis, and these models can be used for future proposition of new derivatives, increasing the chances of obtaining potentially anti-tuberculosis compounds. (C) 2019 Elsevier Masson SAS. All rights reserved.