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- W2154964159 abstract "Sonoporation is achieved by ultrasound-mediated destruction of ultrasound contrast agents (UCA) microbubbles. For this, UCAs must be tissue specific and have good echogenicity and also function as drug carriers. Previous studies have developed acoustic liposomes (ALs), liposomes that encapsulate phosphate buffer solution and perfluoropropane (C(3)F(8)) gas and function as both UCAs and drug carriers. Few studies have examined the co-existence of gas and liquid in ALs. This study aims to elucidate AL structure using TEM. The size, zeta potential and structure of ALs were compared with those of two other UCAs, human albumin shell bubbles (ABs; Optison) and lipid bubbles (LBs). ABs and LBs encapsulate the C(3)F(8) gas. Particle size was measured by dynamic light scattering. The zeta potential was determined by the Smoluchowski equation. UCA structure was investigated by TEM. ALs were approximately 200 nm in size, smaller than LBs and ABs. ALs and LBs had almost neutral zeta potentials whereas AB values were strongly negative. The negative or double staining TEM images revealed that approximately 20% of ALs contained both liquid and gas, while approximately 80% contained liquid alone (i.e. nonacoustic). Negative staining AB images indicated electron beam scattering near the shell surface, and albumin was detected in filament form. These findings suggest that AL is capable of carrying drugs and high-molecular-weight, low-solubility gases." @default.
- W2154964159 created "2016-06-24" @default.
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- W2154964159 date "2009-11-11" @default.
- W2154964159 modified "2023-10-18" @default.
- W2154964159 title "Morphological study of acoustic liposomes using transmission electron microscopy" @default.
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- W2154964159 doi "https://doi.org/10.1093/jmicro/dfp056" @default.
- W2154964159 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19906662" @default.
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