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• W937129095 abstract "Long term retention of antimicrobials with effective drug concentration in gingival crevicular fluid (GCF) is of vital importance for the treatment of chronic periodontitis. In this study, a novel epithelial cell-targeting nanoparticle drug delivery system by conjugating minocycline-loaded poly(ethylene glycol)-poly(lactic acid) (PEG-PLA) nanoparticles (NP-MIN) with RGD peptide were developed and administrated locally for targeting periodontitis epithelial cells and enhancing the treatment of periodontitis in dogs. Biodegradable NP-MIN was made with an emulsion/solvent evaporation technique. RGD peptide was conjugated to the surface of nanoparticles via Maleimide group reaction with hydrosulfide in RGD peptide (RGD-NP-MIN). Transmission electron microscopy examination and dynamic light scattering results revealed that RGD-NP-MIN had a sphere shape, with a mean diameter around 106nm. In vitro release of minocycline from RGD-NP-MIN showed that RGD modification did not change the remarkable sustained releasing characteristic of NP-MIN. To elucidate the interaction of RGD-NP and epithelial cells, RGD-NP binding, uptake and cellular internalization mechanisms by calu-3 cells were investigated. It was shown RGD modification significantly enhanced nanoparticles binding and uptake by Calu-3 cells, and RGD-NP uptake was an energy-dependent process through receptor-mediated endocytosis. Both clathrin-associated endocytosis and caveolae-dependent endocytosis pathway were involved in the RGD-NP uptake, and the intracellular transport of RGD-NP was related to lysosome and Golgi apparatus. Finally, in vivo pharmacokinetics of minocycline in the periodontal pockets and anti-periodontitis effects of RGD-NP-MIN on periodontitis-bearing dogs were evaluated. After local administration of RGD-NP-MIN, minocycline concentration in gingival crevicular fluid decreased slowly and maintained an effective drug concentration for a longer time than that of NP-MIN. Anti-periodontitis effects demonstrated that RGD-NP-MIN could significantly decrease symptoms of periodontitis, which was better than any other control group. These findings suggested that these epithelial cell-targeting nanoparticles offered a novel and effective local delivery system for the treatment of periodontitis." @default.
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• W937129095 date "2015-11-01" @default.
• W937129095 modified "2023-09-24" @default.
• W937129095 title "RGD functionalized polymeric nanoparticles targeting periodontitis epithelial cells for the enhanced treatment of periodontitis in dogs" @default.
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• W937129095 doi "https://doi.org/10.1016/j.jcis.2015.07.032" @default.
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