The Comparative Study between PLGA and Chitosan Scaffolds for Cartilage Tissue Engineering

연골조직공학에서 Polyactic-Glycolic Acid와 Chitosan 골격의 비교

  • Lee, Yong Jik (Department of Plastic & Reconstructive Surgery, Kyungpook National University Hospital) ;
  • Chung, Ho Yun (Department of Plastic & Reconstructive Surgery, Kyungpook National University Hospital) ;
  • Shin, Dong Phil (Dr. Shin's Aesthetic Plastic Surgical Clinic) ;
  • Kim, Jong Yeop (Department of Plastic & Reconstructive Surgery, Kyungpook National University Hospital) ;
  • Yang, Jung Duk (Department of Plastic & Reconstructive Surgery, Kyungpook National University Hospital) ;
  • Lee, Dong Gul (Department of Plastic & Reconstructive Surgery, Kyungpook National University Hospital) ;
  • Park, Jae Woo (Department of Plastic & Reconstructive Surgery, Kyungpook National University Hospital) ;
  • Cho, Byung Chae (Department of Plastic & Reconstructive Surgery, Kyungpook National University Hospital) ;
  • Baik, Bong Soo (Department of Plastic & Reconstructive Surgery, Ulsan Dongkang Hospital)
  • 이용직 (경북대학교 의과대학 성형외과학교실) ;
  • 정호윤 (경북대학교 의과대학 성형외과학교실) ;
  • 신동필 (신동필 성형외과) ;
  • 김종엽 (경북대학교 의과대학 성형외과학교실) ;
  • 양정덕 (경북대학교 의과대학 성형외과학교실) ;
  • 이동걸 (경북대학교 의과대학 성형외과학교실) ;
  • 박재우 (경북대학교 의과대학 성형외과학교실) ;
  • 조병채 (경북대학교 의과대학 성형외과학교실) ;
  • 백봉수 (울산동강병원 성형외과)
  • Received : 2005.04.25
  • Published : 2005.09.10

Abstract

Clinical application of the cartilage formed by tissue engineering is of no practical use due to the failure of long-term structural integrity maintenance. One of the important factors for integrity maintenance is the biomaterial for a scaffold. The purpose of this study is to evaluate the difference between polylactic-co-glycolic acids (PLGA) and chitosan as scaffolds. Human auricular chondrocytes were isolated, cultured, and seeded on the scaffolds, which were implanted in the back of nude mice. Eight animals were sacrificed at 4, 8, 12, 16, and 24 weeks after implantation respectively. In gross examination and histological findings, the volume of chondrocyte-PLGA complexes was decreased rapidly. The volume of chondrocyte-chitosan complexes was well maintained with a slow decrease rate. The expression of type II collagen protein detected by immunohistochemistry and western blots became weaker with time in the chondrocyte-PLGA complexes. However, the expression in the chondrocyte-chitosan complexes was strong for the whole period. Collagen type II gene expressions using RT-PCR showed a similar pattern. In conclusion, these results suggest that chitosan is a superior scaffold in cartilage tissue engineering in terms of structural integrity maintenance. It is expected that chitosan scaffold may become one of the most useful scaffolds for cartilage tissue engineering.

Keywords

Acknowledgement

Supported by : 경북대학교

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