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- W2964956711 abstract "The purpose of this study was to design inhalable sustained-release nanoparticle-in-microparticles, i.e. nano-embedded microparticles, for the lung delivery of chloramphenicol or thiamphenicol as aerosols. The palmitate ester prodrugs of the two antibiotics were used to prepare PLGA-based nanoparticles or to form pure prodrug nanoparticles. Prodrug-loaded PLGA nanoparticles or pure prodrug nanoparticles were prepared using the emulsion-solvent evaporation method. Dry microparticle powders for inhalation were then produced by spray-drying the nanoparticle suspensions supplemented with lactose as a bulking agent and L-leucine as a dispersing enhancer. Examined under the scanning electron microscopy, the obtained microparticles appeared to be spherical and shriveled, with no crystal-like structures. Drug loading was satisfactory (14 to 34% (m/m)) and the aerodynamic properties determined with a Next Generation Impactor were appropriate for lung delivery, with mass median aerodynamic diameters close to 3 μm. The in vitro release profiles showed that sustained released was achieved with these formulations, with an almost complete release over 14 days." @default.
- W2964956711 created "2019-08-13" @default.
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- W2964956711 date "2019-10-01" @default.
- W2964956711 modified "2023-10-18" @default.
- W2964956711 title "Sustained-release microparticle dry powders of chloramphenicol palmitate or thiamphenicol palmitate prodrugs for lung delivery as aerosols" @default.
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- W2964956711 doi "https://doi.org/10.1016/j.ejps.2019.105028" @default.
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