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• W2005071946 abstract "Purpose of the present study was the development of a mucoadhesive nanoparticulate drug delivery system for local use in intravesical therapy of interstitial cystitis, since only a small fraction of drug actually reaches the affected site by conventional treatment of bladder diseases via systemic administration. Chitosan-thioglycolic acid (chitosan-TGA) nanoparticles (NP) and unmodified chitosan NP were formed via ionic gelation with tripolyphosphate (TPP). Trimethoprim (TMP) was incorporated during the preparation process of NP. Thereafter, the mucoadhesive properties of NP were determined in porcine urinary bladders and the release of TMP among simulated conditions with artificial urine was evaluated. The particles size ranged from 183 nm to 266 nm with a positive zeta potential of +7 to +13 mV. Under optimized conditions the encapsulation efficiency of TMP was 37%. The adhesion of prehydrated chitosan-TGA NP on the urinary bladder mucosa under continuous urine voiding was 14-fold higher in comparison to unmodified chitosan NP. Release studies indicated a more sustained TMP release from covalently cross linked particles in comparison to unmodified chitosan-TPP NP over a period of 3 h in artificial urine at 37 °C. Utilizing the method described here, chitosan-TGA NP might be a useful tool for local intravesical drug delivery in the urinary bladder." @default.
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• W2005071946 date "2011-09-01" @default.
• W2005071946 modified "2023-10-12" @default.
• W2005071946 title "Development of a mucoadhesive nanoparticulate drug delivery system for a targeted drug release in the bladder" @default.
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• W2005071946 doi "https://doi.org/10.1016/j.ijpharm.2011.06.033" @default.
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