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• W2007449636 abstract "In vitro and in vivo release of the theophylline, loaded in mixed polysaccharidic cellulose/chondroitin sulfate (C/CS) hydrogels has been evaluated. The C/CS hydrogels in various mixing ratios obtained by a crosslinking technique were supplementary characterized by swelling studies in a pH 2.2 acidic solution at 37 °C, simulating the gastrointestinal medium, as in vivo theophylline delivery was done by oral administration. The hydrogels loading degree with theophylline was evaluated by near infrared chemical imaging (NIR-CI) technique and confirmed also by FT-IR spectroscopy. Based on PLS-DA (partial least squares-discriminate analysis) prediction, the drug loading was found up to 92.5%. The in vitro release profiles of theophylline from C/CS hydrogels showed that an increase of chondroitin sulfate leads to a decreased theophylline percent released, increased half release time and time to reach maximum percent released. During in vivo test, the raw theophylline was rapidly, absorbed, distributed, and eliminated. Comparatively with raw drug administration, the t1/2 and AUC0–72 value were 4 times higher for theophylline loaded into 50/50 C/CS hydrogel. A good in vitro–in vivo correlation was found. A retarded release, controlled by CS content can be achieved by using mixed hydrogels as carriers." @default.
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• W2007449636 date "2012-09-01" @default.
• W2007449636 modified "2023-10-17" @default.
• W2007449636 title "In vitro and in vivo theophylline release from cellulose/chondroitin sulfate hydrogels" @default.
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• W2007449636 doi "https://doi.org/10.1016/j.carbpol.2012.05.004" @default.
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