Calcified Honeycomb-shaped Collagen Maintains its Geometry in Vivo and Effectively Induces Vasculature and Osteogenesis

• KUBOKI Yoshinori

  Professor Emeritus, Hokkaido University Koken Institute, Koken Co., Ltd. School of Medicine, Xinxiang Medical University

• KU Shouhei

  Koken Institute, Koken Co., Ltd. School of Medicine, Xinxiang Medical University

• YOSHIMOTO Ryota

  School of Dentistry, Health Science University of Hokkaido

• KAKU Tohru

  School of Dentistry, Health Science University of Hokkaido

• TAKITA Hiroko

  Graduate School Dental Medicine, Hokkaido University

• LI Dong

  School of Medicine, Sapporo Medical University

• KOKAI Yasuo

  School of Medicine, Sapporo Medical University

• YUNOKI Shunji

  Tokyo Metropolitan Industrial Technology Research Institute

• SAMMONS Rachel L.

  School of Dentistry, Birmingham University

• OZEKI Kazuhide

  School of Mechanical Engineering, Ibaraki University

• MIYATA Teruo

  Koken Institute, Koken Co., Ltd.

Abstract

Honeycomb collagen (HC) with its unique geometric structure has been used in cell culture experiments to study the three-dimensional (3D) effects of the artificial matrix. When implanted in animal tissue however, HC was easily distorted and its geometric structure crushed. In order to elucidate the effect of 3D geometry of this scaffold in both in vitro and in vivo, we attempted to give it rigidity by calcifying and coating HC with hydroxyapatite. By using a calcifying solution with a high calcium (15 mM) and phosphate (9 mM) concentration, hydroxyapatite was evenly precipitated on the surface of HC, obtaining 10 times higher weight than the original HC. A mechanical strength test of the calcified HC showed a 4 times higher compression modulus than the original HC. Implantation of calcified HC into rats subcutaneously with BMP effectively induced bone, comparable with the HC and another conventional scaffold. Moreover, implantation of calcified HC without BMP induced vasculature along individual tunnels of the calcified HC, while the implantation of HC alone without BMP led to the degradation of the scaffold at 4-8 weeks.

Journal

• Nano Biomedicine

  Nano Biomedicine 1 (2), 85-94, 2009

  Nano Biomedical Society

Keywords

• honeycomb collagen
• calcification
• rigidity
• vasculature
• osteogenesis

Details

• CRID: 1390282680322036864
• NII Article ID: 130004555803
• DOI: 10.11344/nano.1.85
• ISSN: 21854734
• ISSN: 18835198
• Web Site: https://search.jamas.or.jp/link/ui/2010196844
• Text Lang: en
• Data Source:
  • JaLC
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed