A nitrophenyl-based prodrug type for colorectal targeting of prednisolone, budesonide and celecoxib
作者:Juan F. Marquez Ruiz、Kinga Kedziora、Maria Pigott、Brian Keogh、Henry Windle、Jason Gavin、Dermot P. Kelleher、John F. Gilmer
DOI:10.1016/j.bmcl.2013.01.060
日期:2013.3
Celecoxib is a COX-2 inhibitor drug that can be used to reduce the risk of colorectal adenocarcinoma. Glucocorticoids are used in the treatment of inflammatory bowel disease. A limitation to the use of both drug types is that they undergo absorption from the intestinal tract with serious side effects. The prodrug systems introduced here involve forming a nitro-substituted acylsulfonamide group in the case of celecoxib and a nitro-substituted 21-ester for the glucocorticoids. Drug release is triggered by the nitro reductase action of the colonic microflora, liberating a cyclization competent species. The release of the active parent drugs was evaluated in vitro using Clostridium perfringens and epithelial transport through Caco-2 monolayer evaluation was carried out to estimate the absorption properties of the prodrugs compared to the parental drugs. (C) 2013 Elsevier Ltd. All rights reserved.