Combination of BMP-2-releasing gelatin/β-TCP sponges with autologous bone marrow for bone regeneration of X-ray-irradiated rabbit ulnar defects

Masaya Yamamoto, Akishige Hokugo, Yoshitake Takahashi, Takayoshi Nakano, Masahiro Hiraoka, Yasuhiko Tabata

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

The objective of this study is to evaluate the feasibility of gelatin sponges incorporating β-tricalcium phosphate (β-TCP) granules (gelatin/β-TCP sponges) to enhance bone regeneration at a segmental ulnar defect of rabbits with X-ray irradiation. After X-ray irradiation of the ulnar bone, segmental critical-sized defects of 20-mm length were created, and bone morphogenetic protein-2 (BMP-2)-releasing gelatin/β-TCP sponges with or without autologous bone marrow were applied to the defects to evaluate bone regeneration. Both gelatin/β-TCP sponges containing autologous bone marrow and BMP-2-releasing sponges enhanced bone regeneration at the ulna defect to a significantly greater extent than the empty sponges (control). However, in the X-ray-irradiated bone, the bone regeneration either by autologous bone marrow or BMP-2 was inhibited. When combined with autologous bone marrow, the BMP-2 exhibited significantly high osteoinductivity, irrespective of the X-ray irradiation. The bone mineral content at the ulna defect was similar to that of the intact bone. It is concluded that the combination of bone marrow with the BMP-2-releasing gelatin/β-TCP sponge is a promising technique to induce bone regeneration at segmental bone defects after X-ray irradiation.

Original languageEnglish
Pages (from-to)18-25
Number of pages8
JournalBiomaterials
Volume56
DOIs
Publication statusPublished - 2015 Jul 1
Externally publishedYes

Keywords

  • Bone morphogenetic protein (BMP)
  • Bone regeneration
  • Controlled release
  • Gelatin/β-tricalcium phosphate (TCP) sponges
  • Radiation
  • Segmental defect

ASJC Scopus subject areas

  • Bioengineering
  • Ceramics and Composites
  • Biophysics
  • Biomaterials
  • Mechanics of Materials

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