Chinese Journal of Tissue Engineering Research ›› 2014, Vol. 18 ›› Issue (51): 8233-8237.doi: 10.3969/j.issn.2095-4344.2014.51.007

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Effect of mouse nerve growth factor on osteoporosis after peripheral nerve injury

Zi Ying1, Liu Xin-wei2, Li Zhe3, Deng Lian-fu4   

  1. 1Department of Emergency, No. 463 Hospital of Chinese PLA, Shenyang 110042, Liaoning Province, China; 2Department of Orthopedics, No. 210 Hospital of Shenyang Military Area Command of Chinese PLA, Dalian 116011, Liaoning Province, China; 3No. 705 Hospital of Shenyang Air Force, Shenyang 110000, Liaoning Province, China; 4Shanghai Key Laboratory for Bone and Joint Disease, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, Chin
  • Online:2014-12-10 Published:2014-12-10
  • Contact: Deng Lian-fu, M.D., Investigator, Shanghai Key Laboratory for Bone and Joint Disease, Shanghai Institute of Traumatology and Orthopaedics, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
  • About author:Zi Ying, M.D., Associate chief physician, Department of Emergency, No. 463 Hospital of Chinese PLA, Shenyang 110042, Liaoning Province, China

Abstract:

BACKGROUND: Osteoporosis after nerve injury has different pathogenesis from osteoporosis of other causes. A more complex set of factors can be involved in the occurrence and development of osteoporosis after nerve injury. In addition to the loss of stress stimulation, cytokines abnormalities, abnormal nerve function and variation of hormone levels are all involved in osteoporosis after nerve injury.

OBJECTIVE: To observe the interaction between nerve injury and osteoporosis by using living animal experiments.
METHODS: Male Sprague-Dawley rats were randomly divided into normal control and denervation groups. Denervated rat models were caused by cutting off the femoral nerve, and then subdivided into model group and nerve growth factor group. Rats in the nerve growth factor group were subjected to 0.2 mL nerve growth factor injection into the gastrocnemius of bilateral lower limbs, once a day; while rats in the model group were subjected to the same volume of saline. No treatment was done in the normal control group. After 30 days, the rats were weighted and blood samples were collected followed by killing, and then the femur bone was taken out for histomorphometry examination.
RESULTS AND CONCLUSION: After injection of nerve growth factor, the body mass and trabecular bone volume of rats in the nerve growth factor group was significantly higher than those in the model group, indicating local injection of nerve growth factor could obviously reduce the extent of osteoporosis in denervated rats, and meanwhile weaken the weight loss due to denervation. However, there was no change in blood calcium and phosphorus concentrations in each group. Experimental findings suggest that neurological osteoporosis does not originate from the loss of calcium and phosphorus, but by structural changes in the trabecular bone; meanwhile, exogenous mouse nerve growth factor is of positive significance for osteoporosis following after nerve paralysis.


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


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Key words: denervation, osteoporosis, nerve growth factor

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