Application of inulin/Eudragit RS in 5-ASA pellet coating with tuned, sustained-release feature in an animal model of ulcerative colitis.

Hossein Shahdadi Sardou, Abbas Akhgari, Amir Hooshang Mohammadpour, Hossein Kamali, Amir Hossein Jafarian, Hadi Afrasiabi Garekani, Fatemeh Sadeghi

International journal of pharmaceutics 2021 Mar 15

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A tunable release of 5-aminosalicylic acid (5-ASA) could bring therapeutic benefits in the treatment of inflammatory bowel disease (IBD). A 32 factorial design was used to achieve a tuned delivery of 5-ASA pellets in the small and large intestine using a coating composed of inulin/Eudragit RS (RS). The ratio of inulin/RS and coating level were independent variables while the dependent variables were the percent of drug release at pH 1.2 in 2 h and total release of drug in 10 h at pH 6.8. 5-ASA release from pellets was examined at different pH levels and the therapeutic efficacy of the optimum pellets was compared to 5-ASA pellets of Pentasa in rats with ulcerative colitis. The inulin/RS of 18/82 at a coating level of 16% was found to be the optimum for delivery of the drug to the small and large intestine. The coated pellets offered a superior therapeutic outcome compared to uncoated pellets and Pentasa in terms of colitis activity index (CAI), and the colon's tissue enzymes of GSH and MDA. The optimum coating composed of inulin and RS could offer a tuned sustained release of 5-ASA throughout the small and large intestine with the sensitivity of drug release to microbial degradation. Copyright © 2021 Elsevier B.V. All rights reserved.

Citation

Hossein Shahdadi Sardou, Abbas Akhgari, Amir Hooshang Mohammadpour, Hossein Kamali, Amir Hossein Jafarian, Hadi Afrasiabi Garekani, Fatemeh Sadeghi. Application of inulin/Eudragit RS in 5-ASA pellet coating with tuned, sustained-release feature in an animal model of ulcerative colitis. International journal of pharmaceutics. 2021 Mar 15;597:120347