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1. Differential adaptive responses of Staphylococcus aureus to in vitro selection with different antimicrobial peptides.

Author

Shireen T, Singh M, Das T, and Mukhopadhyay K

Subjects
Anti-Bacterial Agents pharmacology, Antimicrobial Cationic Peptides, Cell Membrane drug effects, Cell Membrane metabolism, Gramicidin, Microbial Sensitivity Tests, Phospholipids metabolism, Anti-Infective Agents pharmacology, Peptides pharmacology, Staphylococcus aureus drug effects, Staphylococcus aureus metabolism
Abstract

We subjected Staphylococcus aureus ATCC 29213 to serial passage in the presence of subinhibitory concentrations of magainin 2 and gramicidin D for several hundred generations. We obtained S. aureus strains with induced resistance to magainin 2 (strain 55MG) and gramicidin D (strain 55GR) that showed different phenotypic changes in membrane properties. Both exhibited a change in membrane phospholipid content and an increase in membrane rigidity, while an alteration in net charge compared to that of the control occurred only in the case of 55MG.

Published
2013
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