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In-vitro and In-vivo Pharmacokinetic Evaluation of Guar Gum-Eudragit® S100 Based Colon-targeted Spheroids of Sulfasalazine Co-administered with Probiotics

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Background: Polysaccharide based delivery systems have been successfully used to target drugs to colon. In some recent reports, the superiority of concomitant administration of probiotics with such systems has been established. However, the pharmacokinetics of such symbiotic therapy remain unexplored hitherto.

Methods: This study deciphers the pharmacokinetic parameters of guar gum based colon targeted spheroids of sulfasalazine with co-administration of probiotics in experimental rats. Thirty rats were divided into five groups using Latin square design. These were subjected to treatment with delayed release formulation, uncoated spheroids, coated spheroid and coated spheroids along with probiotics.

Results: In case of delayed release formulation, negligible presence of sulfasalazine in plasma was observed in first 2h, followed by significant increase in sulfasalazine concentration after 3h. Higher plasma concentrations of sulfasalazine were detected for uncoated spheroids with and without probiotics. Negligible release of drug upto 5h and delayed Tmax in case of guar-gum coated sulfasalazine spheroids with or without probiotics clearly indicated successful formulation of colon targeted spheroids. Further, for coated spheroids (both with and without probiotics), the value of Tmax is found to be significantly higher than those with the other treatments.

Conclusion: Colon targeted spheroids were therefore, found to reduce absorption of drug which, in turn, is expected to reduce the side effects as only local action in colon is required for treatment of colitis. This is the first report on pharmacokinetic study of a colon targeted delivery system co-administered with probiotics.
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Keywords: Sulfasalazine; delayed release tablets; dissolution; pharmacokinetics; probiotics; spheroids

Document Type: Research Article

Publication date: March 1, 2018

This article was made available online on December 27, 2017 as a Fast Track article with title: "In vitro and In vivo Pharmacokinetic Evaluation of Guar Gum-Eudragit® S100 Based Colon-Targeted Spheroids of Sulfasalazine Co-Administered with Probiotics".

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  • The aim of Current Drug Delivery is to publish peer-reviewed articles, short communications, short and in-depth reviews in the rapidly developing field of drug delivery. Modern drug research aims to build in delivery properties of a drug at the design phase, however in many cases this ideal cannot be met and the development of delivery systems becomes as important as the development as the drugs themselves.

    The journal aims to cover the latest outstanding developments in drug and vaccine delivery employing physical, physico-chemical and chemical methods. The drugs include a wide range of bioactive compounds from simple pharmaceuticals to peptides, proteins, nucleotides, nucleosides and sugars. The journal will also report progress in the fields of transport routes and mechanisms including efflux proteins and multi-drug resistance.

    The journal is essential for all pharmaceutical scientists involved in drug design, development and delivery.
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