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Title: Impact of glutaraldehyde on in vivo colon-specific release of resveratrol from biodegradable pectin-based formulation
Authors: Das, S.
Ng, K. 
Keywords: Biodegradable polymers
Colonic drug delivery
Controlled release
Issue Date: Dec-2010
Citation: Das, S., Ng, K. (2010-12). Impact of glutaraldehyde on in vivo colon-specific release of resveratrol from biodegradable pectin-based formulation. Journal of Pharmaceutical Sciences 99 (12) : 4903-4916. ScholarBank@NUS Repository.
Abstract: Despite potential therapeutic efficacy of resveratrol on colitis and colorectal cancer, rapid absorption and metabolism at the upper gastro-intestinal (GI) tract prevent its clinical application. To overcome this, we attempted to develop colon-specific multi-particulate calcium-pectinate (Ca-pectinate) formulations of resveratrol. However, they were unable to prevent premature drug release at the upper GI tract. Thus, glutaraldehyde (Glu) was used for further cross-linking of the pectin chains. The formulation conditions and procedure were optimized from the in vitro drug release study. The optimized formulation was subjected to in vivo pharmacokinetic study in rats and compared with the unmodified Ca-pectinate and suspension formulation of resveratrol. Spherical particles (~1 mm diameter) with high drug encapsulation were produced. Low cross-linking solution pH (1.5), minimum Glu concentration (2.5%) and cross-linking time (2 h) were crucial to exhibit colon-specific drug release. As Glu was added in the cross-linking solution, cross-linking between pectin chains and Glu occurred simultaneously during Ca-pectinate network formation, which appeared as a cost-effective formulation technique. Most importantly, the pharmacokinetic study demonstrated in vivo colon-specific drug release from the optimized formulation, while faster drug release was observed from the unmodified and suspension formulations. Hence, the developed formulation has potential to be used as colon-specific delivery system of resveratrol. © 2010 Wiley-Liss, Inc.
Source Title: Journal of Pharmaceutical Sciences
ISSN: 00223549
DOI: 10.1002/jps.22212
Appears in Collections:Staff Publications

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