alexa Inhibitors of Ca2+ and K+ transport enhance intracellular killing of M. tuberculosis by non-killing macrophages.
Biomedical Sciences

Biomedical Sciences

Journal of Biomolecular Research & Therapeutics

Author(s): Martins M, Viveiros M, Amaral L

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Abstract BACKGROUND: Human monocyte-derived macrophages that have little killing activity of their own kill intracellular Staphylococcus aureus when cultured in the presence of inhibitors of calcium and potassium efflux pumps. The aim of this study was to evaluate the effect of inhibitors such as ouabain, reserpine and verapamil in the killing activity of macrophages infected with Mycobacterium tuberculosis. MATERIALS AND METHODS: Macrophages obtained from peripheral blood were infected with M. tuberculosis ATCC27294 H37Rv and treated with reserpine, ouabain and verapamil. RESULTS: After three days post-infection, macrophages treated with the inhibitors demonstrated an enhancement of the killing activity destroying the internalized bacteria. CONCLUSION: Whereas drugs that target the bacterium are predicted to lose effectiveness due to mutation of the bacterial target, drugs that enhance killing by macrophages that normally do not kill mycobacteria may yield a more effective form of infections therapy caused by multidrug resistant M. tuberculosis.
This article was published in In Vivo and referenced in Journal of Biomolecular Research & Therapeutics

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