Liquid chromatography-mass spectrometry-based protocol to measure drug accumulation in Mycobacterium tuberculosis and its host cell

The extent to which a drug accumulates in Mycobacterium tuberculosis (Mtb) and its host cell can affect treatment efficacy. We describe protocols measuring drug accumulation in Mtb, macrophages, and Mtb-infected macrophages. The method leverages drug extraction from the cellular lysate and drug-level quantification by liquid chromatography-mass spectrometry. The general methodology has broad applicability and can quantify drug accumulation in other cell types, while being extended to quantification of drug metabolites formed within the cell under study. For complete details on the use and execution of this protocol, please refer to Lavin et al. (2021).(1)