Statins increase rifampin mycobactericidal effect.

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TitleStatins increase rifampin mycobactericidal effect.
Publication TypeJournal Article
AuthorsLobato LS, Rosa PS, da Ferreira JS, da Neumann AS, da Silva MG, do Nascimento DC, Soares CT, Pedrini SCB, de Oliveira DLSá, Monteiro CP, Pereira GMB, Ribeiro-Alves M, Hacker MA, Moraes MO, Pessolani MCV, Duarte RS, Lara FA
Abbrev. JournalAntimicrob. Agents Chemother.
JournalAntimicrobial Agents and Chemotherapy
Year of Publication2014
Publication Languageeng
KeywordsMycobacteria leprae, Mycobacteria tuberculosis, Resistance, Treatment

Mycobacterium leprae and Mycobacterium tuberculosis antimicrobial resistance has been followed with great concern during the last years, while the need for new drugs able to control leprosy and tuberculosis, mainly due to XDR-TB, is pressing. Our group has recently described that M. leprae is able to induce lipid body biogenesis and cholesterol accumulation in macrophages and Schwann cells, facilitating its viability and replication. Considering these previous results, we investigated the efficacy of two statins on the intracellular viability of mycobacteria within the macrophage, and atorvastatin effect on BALB/c mice M. leprae infection. We observed that intracellular mycobacteria viability decreased markedly after incubation with both statins, but atorvastatin showed the best inhibitory effect when combined with rifampin. Using Shepard's model we observed atorvastatin efficacy in control M. leprae and inflammatory infiltrate in the BALB/c footpad, in a serum cholesterol level dependent way. We conclude that statins contribute to macrophage-bactericidal activity against M. bovis, M. leprae and M. tuberculosis. It is likely that statins association with the actual multidrug therapy could effectively reduce mycobacteria viability and tissue lesion in Leprosy and Tuberculosis patients, although epidemiological studies are still needed for confirmation.

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