Soares de Oliveira C, dos Santos Falcão-Silva V, Siqueira-Júnior JP, Harding DP, Lira BF, Lorenzo JGF, Barbosa-Filho JM, Filgueiras de Athayde-Filho P. Drug resistance modulation in Staphylococcus aureus, a new biological activity for mesoionic hydrochloride compounds.
Molecules 2011;
16:2023-31. [PMID:
21358591 PMCID:
PMC6259633 DOI:
10.3390/molecules16032023]
[Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Revised: 02/19/2011] [Accepted: 02/22/2011] [Indexed: 11/24/2022] Open
Abstract
Two salts of the mesoionic compounds 1,4-diphenyl-5-(5-nitro-2-furanyl)-1,3,4-thiadiazolium-2-thiol chloride (MC-1) and 4-phenyl-5-(5-nitro-2-furanyl)-1,3,4-thiadiazolium-2-phenylamine chloride (MC-2) were synthesized utilizing 1,4-diphenyl-thiosemicarbazide and 5-nitro-2-furoyl chloride as starting materials. Their structures were characterized by IR, 1H-NMR, 13C-NMR and elemental analysis. These compounds were analyzed for their influence on the effectiveness of norfloxacin, tetracycline, and erythromycin (standard antibiotics) against resistant strains of Staphylococcus aureus.MC-1 and MC-2, at sub-inhibitory concentrations of 16 μg/mL, favourably modulated the antibiotic activity of tetracycline by 16- and 32-fold, respectively (MIC), and that of erythromycin by 4-fold.
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