Why thioridazine in combination with antibiotics cures extensively drug-resistant Mycobacterium tuberculosis infections

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Abstract

Thioridazine (TDZ) in combination with antibiotics to which extensively drug-resistant Mycobacterium tuberculosis (XDR-TB) is initially resistant yields a cure. This is due to the fact that TDZ enhances the killing of intracellular M. tuberculosis by non-killing macrophages, inhibits the genetic expression of efflux pumps of M. tuberculosis that extrude antibiotics prior to reaching their intended targets, and inhibits the activity of existing efflux pumps that contribute to the multidrug-resistant phenotype of M. tuberculosis. The combination of these effects of TDZ probably contributes to the successful recent cures of XDR-TB cases when the phenothiazine TDZ is used in combination with antibiotics to which the patient with XDR-TB was initially unresponsive.
Original languageEnglish
Pages (from-to)376-380
JournalInternational Journal Of Antimicrobial Agents
Volume39
Issue number5
DOIs
Publication statusPublished - 1 Jan 2012

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