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• W2021175108 abstract "The interactions between three liposomal formulations and Pseudomonas aeruginosa cells were evaluated by a lipid mixing assay and electron paramagnetic resonance (EPR) spectroscopy. The effect of the bacteria on the liposomal phase characteristics, the release of the liposomes’ content, and the uptake rate of gentamicin by bacteria were monitored as a function of time, using EPR spectroscopy. The [16-DSA uptake]Total from DPPC (1,2-dipalmitoyl-sn-glycero-3-phosphocholine) liposomes reached 93 ± 12% over a 3-hour assay period, of which 9% crossed the bacterial inner membrane. A small amount of 16-DSA uptake from DPPC/Chol (cholesterol) vesicles was found throughout the 3-hour period of time. Although DPPC/DMPG (dimyristoylphosphatidylglycerol) vesicles showed a smaller value of [16-DSA uptake]Total with respect to that of DPPC vesicles, they appeared to be effective in disrupting the bacterial membrane, resulting in a greater accumulation of 16-DSA inside the inner membrane. Exposure to bacteria caused the DPPC/Chol, DPPC, and DPPC/DMPG formulations to release 4.6 ± 1.5, 17.6 ± 1.2, and 34 ± 3.7% of their content, respectively. Time-dependent fluid regions were developed within the vesicles when mixed with bacteria, and their growth over time depended on liposomal formulations. Incubation of gentamicin with bacteria for 3 hours resulted in 87 ± 3% of the drug crossing the bacterial inner membrane. In conclusion, interaction between the liposome drug carriers and the bacterial cells result in vesicle fusion, disruption of the bacterial membrane, release of the liposomal content in the close vicinity of the bacteria cells, and the subsequent intracellular uptake of the released liposomal content." @default.
• W2021175108 created "2016-06-24" @default.
• W2021175108 creator A5042965389 @default.
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• W2021175108 date "2009-10-15" @default.
• W2021175108 modified "2023-09-23" @default.
• W2021175108 title "Characterization of the interaction between liposomal formulations and<i>Pseudomonas aeruginosa</i>" @default.
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• W2021175108 doi "https://doi.org/10.3109/08982100903218892" @default.
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