Comparison of the biocompatibility of three kinds of antigen-extracted xenogeneic cancellous bone matrices

doi:10.3969/j.issn.2095-4344.2013.29.003

Abstract

Abstract:

BACKGROUND: The form and structure of antigen-extracted xenogeneic cancellous bone through series of physical and chemical treatment are similar to human tissue.
OBJECTIVE: To detect the biocompatibility of antigen-extracted xenogeneic cancellous bone matrix prepared by three different ways.
METHODS: The antigen-extracted xenogeneic cancellous bone scaffold materials which were prepared through physical, chemical and physical-chemical combined methods and hydroxy apatite biological ceramic materials were implanted into the dorsum subcutaneous tissue. Histological observation was done at 4, 8 and 12 weeks after surgery. The antigen-extracted xenogeneic cancellous bone scaffold materials which were prepared through physical, chemical and physical-chemical combined methods respectively was used to culture sheep bone marrow mesenchymal stem cells for 7 days. Cell adhesion, growth, proliferation and stroma secretion were observed.
RESULTS AND CONCLUSION: At 4 weeks after surgery, a strong inflammatory reaction was detected around materials in four groups. At 12 weeks, the xenogeneic bone materials prepared through physical and physical-chemical combined methods and hydroxy apatite biological ceramic materials internal pore and surrounding tissue inflammation disappeared basically, with the presence of thimbleful inflammation cells. The material degradation was more than at 8 weeks. The xenogeneic bone materials prepared through chemical methods material internal pore and surrounding tissue inflammation still existed, suggesting that the xenogeneic bone materials prepared through physical and physical-chemical combined methods exhibited good histocompatibility. A small amount of orderly osteoblasts existed around hydroxy apatite biological ceramic materials and physical-chemical prepared materials, with a small amount of bone. These suggested that there was a tendency for ectopic bone formation. The xenogeneic cancellous bone materials prepared through physical or physical-chemical combined methods have better cytocompatibility. However, scaffold materials prepared through chemical method have poor cytocompatibility and they are not qualified for the safety standards of biological materials.

Key words: biomaterials, tissue-engineered bone materials, xenogenic bone scaffold materials, hydroxyapatite biological ceramic, biocompatibility, subcutaneous implantation, cytotoxicity, bone marrow mesenchymal stem cells, National Natural Science Foundation of China

CLC Number:

R318

Yin Xiao-peng, Xu Hui-fen, He Hui-yu. Comparison of the biocompatibility of three kinds of antigen-extracted xenogeneic cancellous bone matrices[J]. Chinese Journal of Tissue Engineering Research, 2013, 17(29): 5275-5281.

Figures/Tables 6

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