Chinese Journal of Tissue Engineering Research ›› 2017, Vol. 21 ›› Issue (32): 5115-5121.doi: 10.3969/j.issn.2095-4344.2017.32.006

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Related factors accelerate fracture healing in traumatic brain injury combined with fracture

Ma Le-yuan, Zhao Yan, Qiao Wan-qing, Zhu Feng   

  1.  (First Affiliated Hospital of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China)
  • Received:2017-10-03 Online:2017-11-18 Published:2017-11-15
  • Contact: Zhao Yan, M.D., Chief physician, First Affiliated Hospital of Xinjiang Medical University, Urumqi 830054
  • About author:Ma Le-yuan, Master, Physician, First Affiliated Hospital of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China
  • Supported by:

    the Natural Science Foundation of Xinjiang Uygur Autonomous Region, No. 2014211C045

Abstract:

BACKGROUND: Brain injury can promote fracture healing is becoming an issue of concern, but the underlying mechanism remains unknown.
OBJECTIVE: To establish a model of cerebral injury combined with right tibial fracture, and to investigate the cerebrospinal fluid and serum levels of calcitonin gene-related peptide, nerve growth factor and insulin-like growth factor-1.
METHODS: New Zealand white rabbits were randomly divided into four groups: group A: blank control group; group B: simple brain injury group; group C: simple tibial fracture group; group D: tibial fracture combined with brain injury. The cerebrospinal fluid and serum levels of calcitonin gene-related peptide, nerve growth factor and insulin-like
growth factor-1 were detected at different time points. The rabbits in the groups C and D were sacrificed at 1, 4 and 8 weeks after modeling to remove the whole tibia, and scanned by X-ray. The callus volume was calculated, and the pathological changes were analyzed.
RESULTS AND CONCLUSION: The fracture healing was faster in the group D than the group C. The callus volume, trabecular width, trabecular area ratio, and the number of newly born vessels in the group D were significantly higher than those in the group C at 4 weeks after modeling (P < 0.05). The cerebrospinal fluid and serum levels of calcitonin gene-related peptide, nerve growth factor and insulin-like growth factor-1 in the group D were significantly higher than those in the group C (P < 0.05), and the cerebrospinal fluid levels reached the maximum values earlier than did the serum levels. Furthermore, in the group D, the calcitonin gene-related peptide level was increased earlier than the other two factors. To conclude, calcitonin gene-related peptide, nerve growth factor and insulin-like growth factor-1 are essential factors involved in promoting fracture healing after traumatic brain injury, and moreover calcitonin gene-related peptide shows a stronger ability than the other factors.

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程

Key words: Tissue Engineering, Nerve Growth Factor, Brain Injuries, Fractures, Bone

CLC Number: