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- W2046339059 abstract "An oral controlled release system based on direct compression of cross-linked amylose (CLA) and drug powders was previously introduced. For drugs with limited solubility or for some drugs for which solubility can be influenced by variation of gastro-intestinal pH, a system is required to accelerate drug release. This paper describes a novel enzymatically-controlled drug release (ECDR) system based on the addition of alpha-amylase to CLA tablets, which can modulate the release kinetics of drugs. The alpha-amylase within the tablets is able to hydrolyze alpha-1-4-glucosidic bonds present in the CLA semisynthetic substrate. Increasing amounts of alpha-amylase (5 to 25 EU) within the tablets induced a significant decrease in release time from 24 to 6 h. High amounts of external alpha-amylase (300-6000 EU/l) had a slight effect on the release rate. Drug release from the ECDR system seems to be controlled by two sequential mechanisms: (a) hydration and swelling of CLA tablets followed by (b) internal enzymatic hydrolysis of the hydrated gel phase." @default.
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- W2046339059 date "1999-08-01" @default.
- W2046339059 modified "2023-09-30" @default.
- W2046339059 title "Cross-linked amylose tablets containing α-amylase: an enzymatically-controlled drug release system" @default.
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- W2046339059 doi "https://doi.org/10.1016/s0168-3659(99)00065-6" @default.
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