Novel poly(ethylene glycol) scaffolds crosslinked by hydrolyzable polyrotaxane for cartilage tissue engineering

Authors

  • Won Kyu Lee,

    1. School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Tatsunokuchi, Ishikawa 923-1292, Japan
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  • Takahiro Ichi,

    1. School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Tatsunokuchi, Ishikawa 923-1292, Japan
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  • Tooru Ooya,

    1. School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Tatsunokuchi, Ishikawa 923-1292, Japan
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  • Takeyuki Yamamoto,

    1. Japan Tissue Engineering Co., 6-209-1 Miyakitadori, Gamagori, Aichi 443-0022, Japan
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  • Masakazu Katoh,

    1. Japan Tissue Engineering Co., 6-209-1 Miyakitadori, Gamagori, Aichi 443-0022, Japan
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  • Nobuhiko Yui

    Corresponding author
    1. School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Tatsunokuchi, Ishikawa 923-1292, Japan
    • School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Tatsunokuchi, Ishikawa 923-1292, Japan
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Abstract

Highly porous poly(ethylene glycol) (PEG) hydrogel scaffolds crosslinked with hydrolyzable polyrotaxane for cartilage tissue engineering were prepared by a solvent casting/salt leaching technique. The resultant scaffolds have well interconnected microporous structures ranging from 87 to 90%. Pore sizes ranging from 115.5–220.9 μm appeared to be dependent on the size of the sieved sodium chloride particulates. Moreover, a dense surface skin layer was not found on either side of the scaffold surfaces. Using microscopic Alcian blue staining of the chondrocyte-seeded scaffolds, well adhered cells and newly produced glycosaminoglycans (GAG) were confirmed. Following the initial chondrocyte seeding onto the hydrogel scaffolds, the cell number was significantly increased, reaching 149, 877, and 1228 cells/mg of tissue at 8, 15, and 21 days in culture, respectively. The micrograph shows well adhered and spread chondrocytes in the interior pores and a cartilaginous extracellular matrix with a GAG fraction produced from the chondrocytes. Results suggest that the PEG hydrogel scaffolds crosslinked with the hydrolyzable polyrotaxane are a promising candidate for chondrocyte culture. © 2003 Wiley Periodicals, Inc. J Biomed Mater Res 67A: 1087–1092, 2003

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