Abstract
Aims: To explore the role of modifying the phospholipid composition of liposomal nanoparticles (LNPs) on their uptake. Methods: Different LNPs were labeled with a fluorescent marker and their uptake by human lung fibroblast (WI-38) cells was evaluated using flow cytometry and confocal microscopy. Linezolid was loaded in LNPs showing enhanced uptake, and their ability to reduce intracellular methicillin-resistant Staphylococcus aureus (MRSA) was investigated by in vitro infection. Results: Liposomes with disaturated dipalmitoylphosphatidylcholine-phosphatidylglycerol-phosphatidylethanolamine at a molar ratio of 60:10:10, mimicking that of WI-38 cells, were more effectively uptaken. Linezolid-loaded LNPs significantly reduced intracellular MRSA viable count. Conclusion: Modified LNPs could be promising antibiotic nanocarriers for targeting intracellular MRSA, which are usually resistant to conventional antibiotics.
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