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- W2092139611 abstract "N-(2-Hydroxypropyl)methacrylamide (HPMA) copolymer–9-aminocamptothecin (9-AC) conjugate for oral colon-specific drug delivery was designed, synthesized, and characterized. The drug, 9-AC, was attached to the polymer carrier via a spacer containing a combination of an aromatic azo bond and a 4-aminobenzylcarbamate group. The design of the spacer ensured a fast and highly efficient release of unmodified 9-AC from the polymer in the colon by azo bond cleavage followed by a 1,6-elimination mechanism. An in vitro degradation study indicated that this conjugate was stable in simulated upper GI tract conditions, including small intestine (SI) contents, SI mucosa suspension, and in PBS (pH 1.5 and 7.4). A fast release of the unmodified drug (85 ± 10% of 9-AC in 12 h) was detected in rat cecal contents. This drug delivery system has potential in the treatment of colon cancer." @default.
- W2092139611 created "2016-06-24" @default.
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- W2092139611 date "2006-01-01" @default.
- W2092139611 modified "2023-10-17" @default.
- W2092139611 title "Colon-specific 9-aminocamptothecin-HPMA copolymer conjugates containing a 1,6-elimination spacer" @default.
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- W2092139611 doi "https://doi.org/10.1016/j.jconrel.2005.10.004" @default.
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