Design,synthesis and ex vivo evaluation of colon-specific azo based prodrugs of anticancer agents |
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Authors: | Rajiv Sharma Ravindra K. Rawal Tripti Gaba Nishu Singla Manav Malhotra Sahil Matharoo T.R. Bhardwaj |
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Affiliation: | 1. Department of Pharmaceutical Chemistry, Indo-Soviet Friendship (I.S.F.) College of Pharmacy, Ferozepur Road, Moga 142 001, India;2. Uttarakhand Technical University, Dehradun 248 007, India;3. The University of Georgia, College of Pharmacy, GA 30602, USA |
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Abstract: | Colon-specific azo based prodrugs of anticancer agents like methotrexate (6), gemcitabine (7) and analogue of oxaliplatin (RTB-4) (8) were synthesized and characterized by modern analytical techniques. The prepared prodrugs were stable in acidic (pH 1.2) and basic (pH 7.4) buffers which showed their stability in upper GIT environment. Further, an assay was performed which demonstrated the presence of azoreductase enzyme in the rat fecal material, rat cecum content and other parts of intestinal content which reduce specifically the azo bond and release the drug. The in vitro cytotoxicity assay was also performed which clearly indicated that these azo based prodrugs are active against human colorectal cancer cell lines (COLO 205, COLO 320 DM and HT-29). The release behavior of prodrugs (10, 11 and 15) was 60–70% after 24 h incubation at 37 °C. Therefore, the synthesized azo linked prodrugs of methotrexate, gemcitabine and RTB-4 are the potential candidates for colon targeted drug delivery system with minimal undesirable side effects. |
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Keywords: | Prodrug Azoreductase Colon-specific Methotrexate Gemcitabine Oxaliplatin |
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