Determination of Bacterial Membrane Impairment by Antimicrobial Agents
The bacterial cytoplasmic membrane separates the cell from its environment and acts as a selective permeability barrier. In addition, it functions in energy conservation, transport, and biosynthesis processes. Antimicrobial agents disrupting these functions may lead to pleiotropic effects, including leakage of low molecular weight compounds such as ions, amino acids and ATP, and subsequent membrane depolarization. This article describes two techniques to assess antibiotic-induced membrane impairment in vivo.
Key wordsMembrane permeabilization Membrane potential Depolarization Tetraphenylphosphonium bromide Potassium efflux
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