In vitro bactericidal activities of two novel dihydropyridine derivatives against Mycobacterium tuberculosis

Abstract

Introduction: Introducing new and effective antitubercular agents is important in tuberculosis control programs. In this study, the in vitro antitubercular activity of two novel 1,4-dihydropyridine derivatives (F-27, Cl-33) were screened against a total of 113 different strains of Mycobacterium tuberculosis (77 susceptible and 36 resistant clinical isolates). Methodology: The in vitro activities of these compounds were evaluated based on the modified broth macro-dilution assay. Results: Compound F-27 showed more than 90% growth inhibition at the range of 2 to 8 μg/mL (minimum inhibitory concentration [MIC]90: 4.13 ± 0.45 µg/mL; p 0.1). This may emphasize no cross-resistance between F-27 and isoniazid. Conclusions: Considering the sufficient sample size of the study and based on the excellent antimycobacterial activity of F-27, it could be concluded that F-27 is a potent candidate as a lead compound, and may be considered for development of a new antitubercular agent.

Keywords

• Drug discovery
• dihydropyridines
• antitubercular agents
• drug evaluation
• preclinical