Journal
GELS
Volume 8, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/gels8050290
Keywords
semi-interpenetrating network; hydroxy propyl beta cyclodextrin; gelatin; acrylic acid; dexamethasone
Categories
Funding
- Department of Pharmaceutics University Faisalabad, Faisalabad, Pakistan
- Faculty of Pharmaceutical Sciences University Faisalabad, Faisalabad, Pakistan
- Government College University Faisalabad, Faisalabad, Pakistan
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The study successfully developed hydroxy propyl beta-cyclodextrin-g-poly(acrylic acid)/gelatin semi-interpenetrating networks for the colonic delivery of dexamethasone sodium phosphate. The optimized hydrogel formulation showed pH-dependent swelling and mucoadhesive properties, with in vitro drug release assay demonstrating pH-dependent release of dexamethasone sodium phosphate. Overall, the prepared semi-IPN hydrogel exhibited biocompatible nature and potential for colonic drug delivery.
The current study reports the fabrication and biological evaluation of hydroxy propyl beta-cyclodextrin-g-poly(acrylic acid)/gelatin (HP-beta-CD-g-poly(AA)/gelatin) semi-interpenetrating networks (semi-IPN) for colonic delivery of dexamethasone sodium phosphate (DSP). The prepared hydrogels showed pH-dependent swelling and mucoadhesive properties. The mucoadhesive strength of hydrogels increased with an increasing concentration of gelatin. Based on the swelling and mucoadhesive properties, AG-1 was chosen as the optimized formulation (0.33% w/w of gelatin and 16.66% w/w of AA) for further analysis. FTIR revealed the successful development of a polymeric network without any interaction with DSP. SEM images revealed a slightly rough surface after drug loading. Drug distribution at the molecular level was confirmed by XRD. In vitro drug release assay showed pH-dependent release, i.e., a minute amount of DSP was released at a pH of 1.2 while 90.58% was released over 72 h at pH 7.4. The optimized formulation did not show any toxic effects on a rabbit's vital organs and was also hemocompatible, thus confirming the biocompatible nature of the hydrogel. Conclusively, the prepared semi-IPN hydrogel possessed the necessary features, which can be exploited for the colonic delivery of DSP.
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