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Antibiotic-loaded chitosan–Laponite films for local drug delivery by titanium implants: cell proliferation and drug release studies

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Abstract

In this study, chitosan–Laponite nanocomposite coatings with bone regenerative potential and controlled drug-release capacity are prepared by electrophoretic deposition technique. The controlled release of a glycopeptide drug, i.e. vancomycin, is attained by the intercalation of the polymer and drug macromolecules into silicate galleries. Fourier-transform infrared spectrometry reveals electrostatic interactions between the charged structure of clay and the amine and hydroxyl groups of chitosan and vancomycin, leading to a complex positively-charged system with high electrophoretic mobility. By applying electric field the charged particles are deposited on the surface of titanium foils and uniform chitosan films containing 25–55 wt% Laponite and 937–1655 µg/cm2 vancomycin are obtained. Nanocomposite films exhibit improved cell attachment with higher cell viability. Alkaline phosphatase assay reveals enhanced cell proliferation due the gradual dissolution of Laponite particles into the culture medium. In-vitro drug-release studies show lower release rate through a longer period for the nanocomposite compared to pristine chitosan.

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Acknowledgments

The authors thank funding support from the Grant Program of Sharif University of Technology (No. G930305) and Elite National Institute (No. ENL 5418).

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Sharif University of Technology, Azadi Avenue, P.O. Box 11365-9466, Tehran, Iran

    Farideh Ordikhani, Mehdi Dehghani & Arash Simchi

  2. Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Azadi Avenue, P.O. Box 11365-9466, Tehran, Iran

    Arash Simchi

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  1. Farideh Ordikhani
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Correspondence to Arash Simchi.

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Ordikhani, F., Dehghani, M. & Simchi, A. Antibiotic-loaded chitosan–Laponite films for local drug delivery by titanium implants: cell proliferation and drug release studies. J Mater Sci: Mater Med 26, 269 (2015). https://doi.org/10.1007/s10856-015-5606-0

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