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- W2058557568 abstract "Many oral 5-aminosalicylic acid (5-ASA) formulations are designed to maximize 5-ASA release in the colon where it acts topically on the colonic mucosa. Delayed-release formulations and azo-prodrugs minimize 5-ASA absorption in the upper gastrointestinal (GI) tract.To review methods for assessing 5-ASA release and colonic distribution from oral formulations, and the potential use of this information for guiding clinical decisions.PubMed and recent conference abstracts were searched for articles describing techniques used to assess 5-ASA release from ulcerative colitis (UC) therapies.In-vitro GI models, although unable to simulate more complex aspects of GI physiology, can provide useful data on 5-ASA release kinetics and bioaccessibility. Gamma-scintigraphy is useful for investigating GI disintegration of different formulations, but may not accurately reflect 5-ASA distribution. Plasma pharmacokinetic studies provide data on systemic exposure, but not on colonic distribution or mucosal uptake. Mucosal biopsies provide direct evidence of colonic distribution and may predict clinical efficacy, but must be interpreted cautiously because of considerable inter-subject variability and other confounding factors.While assessment of 5-ASA release is important, limitations of individual measurement techniques mean that randomized clinical studies in UC patients remain the best guide for dosing and treatment regimen decisions." @default.
- W2058557568 created "2016-06-24" @default.
- W2058557568 creator A5044524314 @default.
- W2058557568 creator A5081952210 @default.
- W2058557568 date "2008-08-20" @default.
- W2058557568 modified "2023-10-15" @default.
- W2058557568 title "Review article: 5-aminosalicylate formulations for the treatment of ulcerative colitis - methods of comparing release rates and delivery of 5-aminosalicylate to the colonic mucosa" @default.
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- W2058557568 doi "https://doi.org/10.1111/j.1365-2036.2008.03751.x" @default.
- W2058557568 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/18532992" @default.
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