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AAPS PharmSciTech. 2006 June; 7(2): E154–E159.
Published online 2006 June 2. doi:  10.1208/pt070253
PMCID: PMC2750280

A mucoadhesive in situ gel delivery system for paclitaxel

Abstract

MUC1 gene encodes a transmembrane mucin glycoprotein that is overexpressed in human breast cancer and colon cancer. The objective of this study was to develop an in situ gel delivery system containing paclitaxel (PTX) and mucoadhesives for sustained and targeted delivery of anticancer drugs. The delivery system consisted of chitosan and glyceryl monooleate (GMO) in 0.33M citric acid containing PTX. The in vitro release of PTX from the gel was performed in presence and absence of Tween 80 at drug loads of 0.18%, 0.30%, and 0.54% (wt/wt), in Sorensen’s phosphate buffer (pH 7.4) at 37°C. Different mucin-producing cell lines (Calu-3>Caco-2) were selected for PTX transport studies. Transport of PTX from solution and gel delivery system was performed in side by side diffusion chambers from apical to basal (A-B) and basal to apical (B-A) directions. In vitro release studies revealed that within 4 hours, only 7.61%±0.19%, 12.0%±0.98%, 31.7%±0.40% of PTX were released from 0.18%, 0.30%, and 0.54% drugloaded gel formulation, respectively, in absence of Tween 80. However, in presence of surfactant (0.05% wt/vol) in the dissolution medium, percentages of PTX released were 28.1%±4.35%, 44.2%±6.35%, and 97.1%±1.22%, respectively. Paclitaxel has shown a polarized transport in all the cell monolayers with B-A transport 2 to 4 times higher than in the A-B direction. The highest mucin-producing cell line (Calu-3) has shown the lowest percentage of PTX transport from gels as compared with Caco-2 cells. Transport of PTX from mucoadhesive gels was shown to be influenced by the mucin-producing capability of cell.

Keywords: paclitaxel, in situ gel, Caco-2, Calu-3, mucin

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.
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