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• W2113284944 abstract "Bacteriocins (Bcn) are natural peptides that are secreted by several taxonomically distant bacteria and exert bactericidal activity against other bacterial species. Their capacity to inhibit growth of virulent Mycobacterium tuberculosis H37Rv was evaluated in this study. Five different Bcn were isolated and purified from bacterial culture supernatants, their amino acid sequence was determined, and activity against mycobacteria assessed in three different models: in vitro mycobacterial cultures, in vitro infection of mouse macrophages and in vivo high-dose infection of inbred mice. In the in vitro model, four out of five Bcn exhibited stronger antimycobacterial activity than equal concentrations of a widely used anti-TB antibiotic, rifampicin. These Bcn were non-toxic for mouse macrophages at a concentration of 0.1 mg/L (>MIC90 of these compounds). Pure Bcn did not inhibit mycobacterial growth within murine macrophages when added at 0.01–0.1 mg/L, suggesting that at physiologically tolerable concentrations these molecules do not penetrate through the membrane of eukaryotic cells. However, when administered as a complex with phosphatidylcholine–cardiolipin liposomes, Bcn5 (selected as a model compound due to its cytotoxicity and antimycobacterial activity regular titration curves) demonstrated capacity both to inhibit intracellular growth of M. tuberculosis and to prolong survival of mice in an acute TB model. Given that the mechanism of Bcn bactericidal activity differs from that of all commonly used antibiotics, their possible involvement in complex TB therapies deserves further study." @default.
• W2113284944 created "2016-06-24" @default.
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• W2113284944 date "2007-03-08" @default.
• W2113284944 modified "2023-09-27" @default.
• W2113284944 title "Antimycobacterial activity of bacteriocins and their complexes with liposomes" @default.
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• W2113284944 doi "https://doi.org/10.1093/jac/dkm053" @default.
• W2113284944 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/17347179" @default.
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