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Potentials of Chitosan-Based Delivery Systems in Wound Therapy: Bioadhesion Study
Drug Transport and Delivery Research Group, Department of Pharmacy, University of Tromsø, Universitetsveien 57, Tromsø N-9037, Norway
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Received: 6 October 2011; in revised form: 9 November 2011 / Accepted: 27 December 2011 / Published: 6 January 2012
Abstract: Chitosan is currently proposed to be one of the most promising polymers in wound dressing development. Our research focuses on its potential as a vehicle for nano-delivery systems destined for burn therapy. One of the most important features of wound dressing is its bioadhesion to the wounded site. We compared the bioadhesive properties of chitosan with those of Carbopol, a synthetic origin polymer. Chitosan-based hydrogels of different molecular weights were first analyzed by texture analysis for gel cohesiveness, adhesiveness and hardness. In vitro release studies showed no difference in release of model antimicrobial drug from the different hydrogel formulations. Bioadhesion tests were performed on pig ear skin and the detachment force, necessary to remove the die from the skin, and the amount of remaining formulation on the skin were determined. Although no significant difference regarding detachment force could be seen between Carbopol-based and chitosan-based formulations, almost double the amount of chitosan formulation remained on the skin as compared to Carbopol formulations. The findings confirmed the great potential of chitosan-based delivery systems in advanced wound therapy. Moreover, results suggest that formulation retention on the ex vivo skin samples could provide deeper insight on formulation bioadhesiveness than the determination of detachment force.
Keywords: chitosan; Carbopol; hydrogel; texture analysis; wound therapy; bioadhesion
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Hurler, J.; Škalko-Basnet, N. Potentials of Chitosan-Based Delivery Systems in Wound Therapy: Bioadhesion Study. J. Funct. Biomater. 2012, 3, 37-48.
Hurler J, Škalko-Basnet N. Potentials of Chitosan-Based Delivery Systems in Wound Therapy: Bioadhesion Study. Journal of Functional Biomaterials. 2012; 3(1):37-48.
Hurler, Julia; Škalko-Basnet, Nataša. 2012. "Potentials of Chitosan-Based Delivery Systems in Wound Therapy: Bioadhesion Study." J. Funct. Biomater. 3, no. 1: 37-48.