Autologous oxygen-delivering biomimetic nanoscaffold composited with chondrocytes reconstructs the temporomandibular joint

doi:10.3969/j.issn.2095-4344.2016.30.009

Abstract

Abstract:

BACKGROUND: The autologous oxygen-delivering biomimetic nanoscaffold is composited with chondrocytes in simulated microgravity to construct the active tissue-engineered bone, which not only has excellent osteogenic potential characteristics, but also has autologous releasing oxygen, and additionally can effectively prevent early transplant failure caused by sufficient revascularization and hypoxia.
OBJECTIVE: To investigate the effects of autologous oxygen-delivering biomimetic nanoscaffold composited with chondrocytes on repairing different types of temporomandibular joint condylar fractures.
METHODS: Totally 30 Sprague-Dawley rats were randomly divided into control group, experimental groups 1 and 2 (n=10 per group). The autologous oxygen-delivering nano-hydroxyapatite/chitosan scaffold composited with chondrocytes were transplanted into rats with temporomandibular joint condylar longitudinal fracture in the experimental group 1 and those with temporomandibular joint condylar transverse fracture in the experimental group 2, respectively. At 1, 3 and 6 weeks after transplantation, the number of proliferating cell nuclear antigen-positive cells was detected by immunofluorescence assay; the chondrocyte apoptosis was detected using TUNEL method, and expressions of collagen type II, Sox9 and vascular endothelial growth factor were observed by RT-PCR technology.
RESULTS AND CONCLUSION: The number of proliferating cell nuclear antigen-positive cells in the experimental groups 1 and 2 were significantly higher than that in the control group at different time points after transplantation (P < 0.05). At 3 and 6 weeks after transplantation, the number of apoptotic chondrocytes in the experimental groups 1 and 2 was significantly lower than that in the control group (P < 0.05); significantly higher and highest expressions of collagen type II, Sox9 and vascular endothelial growth factor were found in the experimental groups 2 and 1 compared with the control group, respectively (P < 0.05). Additionally, compared with the experimental group 2, the number of proliferating cell nuclear antigen-positive cells was significantly lower in the experimental group 1 at 3 and 6 weeks after transplantation (P < 0.05); the number of apoptotic chondrocytes was significantly lower in the experimental group 1 at 3 weeks after transplantation (P < 0.05). These results indicate that autologous oxygen-delivering biomimetic nanoscaffold composited with chondrocytes to repair different types of temporomandibular joint condylar fractures presents some different outcomes.

中国组织工程研究杂志出版内容重点：生物材料；骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性；组织工程

Key words: Nanocomposites, Chondrocytes, Mandibular Condyle, Tissue Engineering

CLC Number:

R318

Wang Hong, Liao Tian-an, Wang Tao, Fu Liang-bin, Hu Guang-wei, Deng Wei . Autologous oxygen-delivering biomimetic nanoscaffold composited with chondrocytes reconstructs the temporomandibular joint[J]. Chinese Journal of Tissue Engineering Research, 2016, 20(30): 4469-4475.

Figures/Tables 3

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