Acceleration of bone regeneration of horizontal bone defect in rats using collagen-binding basic fibroblast growth factor combined with collagen scaffolds

Shin Nakamura, Takashi Ito, Kentaro Okamoto, Takehiko Mima, Kentaro Uchida, Yasir D. Siddiqui, Masahiro Ito, Masako Tai, Keisuke Okubo, Keisuke Yamashiro, Kazuhiro Omori, Tadashi Yamamoto, Osamu Matsushita, Shogo Takashiba

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Background: Basic fibroblast growth factor (bFGF) has been applied for periodontal regeneration. However, the application depends on bone defect morphology because bFGF diffuses rapidly from defect sites. In a previous study, collagen-binding bFGF (CB-bFGF) has been shown to enhance bone formation by collagen-anchoring in the orthopedic field. The aim of this study is to demonstrate the efficacy of CB-bFGF with collagen scaffolds in bone regeneration of horizontal bone defect. Methods: Cell proliferation activity and collagen binding activity of CB-bFGF was confirmed by WST-8 assay and collagen binding assay, respectively. The retention of CB-bFGF in the collagen sheet (CS) was measured by fluorescence imaging. The rat horizontal alveolar bone defect model was employed to investigate the efficacy of CB-bFGF with collagen powder (CP). After 4 and 8 weeks, the regenerative efficacy was evaluated by microcomputed tomography, histological, and immunohistochemical analyses. Results: CB-bFGF had a comparable proliferation activity to bFGF and a collagen binding activity. CB-bFGF was retained in CS longer than bFGF. At 8 weeks postoperation, bone volume, bone mineral content, and new bone area in CB-bFGF/CP group were significantly increased compared with those in other groups. Furthermore, epithelial downgrowth was significantly suppressed in CB-bFGF/CP group. At 4 weeks, the numbers of osteocalcin, proliferating cell nuclear antigen, and osteopontin-positive cells at the regeneration site in CB-bFGF/CP group were greater than those in other groups. Conclusions: CB-bFGF/CP effectively promoted bone regeneration of horizontal bone defect possibly by sustained release of bFGF. The potential of CB-bFGF composite material for improved periodontal regeneration in vertical axis was shown.

Original languageEnglish
Pages (from-to)1043-1052
Number of pages10
JournalJournal of periodontology
Volume90
Issue number9
DOIs
Publication statusPublished - Sep 1 2019

Keywords

  • bone regeneration
  • collagen
  • drug delivery systems
  • growth factors
  • periodontitis
  • tissue engineering

ASJC Scopus subject areas

  • Periodontics

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