The objective of this study was to explore an innovative sustained release technology and design a new microporous resin-based polymer device (RPD) for controlled release of glipizide (GZ). Photocurable resin was applied to prepare the resin layer to control GZ release. The impact of formulation parameters consisting of the type and amount of pore formers and pH modifiers, photocurable curing time as well as the weight of resin layer on GZ release were examined. The GZ-RPD was fabricated applying 24 mg of resin layer with PEG400 (100 % of the resin weight) as pore former and 10 mg of Na2CO3 as pH modifier. Scanning electron microscopy (SEM) demonstrated resin particles presenting a porous structure constituted the resin layer. The GZ-RPD possessed prolonged Tmax and reduced Cmax relative to commercial tablets. The relative bioavailability of the RPDs as well as commercial tablets was 93.65 % since the AUC0-24 h were 6111.05 ± 238.89 ng·h/mL and 6525.09 ± 760.59 ng h/mL, respectively. The release mechanism of the GZ-RPD was discussed. This paper provided an innovative concept to produce controlled GZ release oral formulation fabricated by photocurable resin, which demonstrated both excellent in vitro release and in vivo pharmacokinetics.
Keywords: Glipizide; Microporous resin-based polymer device; Pharmacokinetic behavior; Photocurable resin; Release mechanism; Sustained drug release.
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