brevinin-1-protein--rana and Tuberculosis

Tuberculosis (TB) is a devastating infectious disease that causes a high rate of mortality. Drugs with new modes of action are needed to overcome this scenario. Cationic antibacterial peptides can serve as a potential alternative to existing TB drugs as they target the entire bacterial membrane for activity, thereby reducing the probability of development of drug resistance. In this study, we report anti-tuberculosis activity of B1CTcu5, a peptide that belongs to brevinin-1 family of antimicrobial peptides. This peptide possesses potent in vitro inhibitory activity against M. tuberculosis at 12.5 μg/mL but was not active against M. smegmatis. B1CTcu5 successfully eliminated intracellular mycobacteria without inducing cytotoxicity to the human macrophages at the concentrations tested. This peptide can be used as a template to design peptide-based anti-tubercular agents.

Topics: Amphibian Proteins; Animals; Antimicrobial Cationic Peptides; Antitubercular Agents; Anura; Cells, Cultured; Humans; Macrophages; Microbial Sensitivity Tests; Mycobacterium tuberculosis; Structure-Activity Relationship; Tuberculosis