Loperamide Restricts Intracellular Growth of Mycobacterium tuberculosis in Lung Macrophages
2016
New approaches for improving tuberculosis (TB) control using adjunct host-directed cellular and repurposed drug therapies are needed. Autophagy plays a crucial role in the response to TB, and a variety of autophagy-inducing drugs that are currently available for various medical conditions may serve as an adjunct treatment in pulmonary TB. Here, we evaluated the potential of loperamide, carbamazepine, valproic acid, verapamil, and rapamycin to enhance the antimicrobial immune response to Mycobacterium tuberculosis (Mtb). Human monocyte-derived macrophages (MDMs) and murine alveolar cells (MACs) were infected with Mtb and treated with loperamide, carbamazepine, valproic acid, verapamil, and rapamycin in vitro. Balb/c mice were intraperitoneally administered loperamide, valproic acid, and verapamil, and MACs were infected in vitro with Mtb. The induction of autophagy, the containment of Mtb within autophagosomes and the intracellular Mtb burden were determined. Autophagy was induced by all of the drugs in hu...
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