Chinese Journal of Tissue Engineering Research ›› 2019, Vol. 23 ›› Issue (25): 3998-4003.doi: 10.3969/j.issn.2095-4344.1771

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Combined use of exogenous nerve growth factor and basic fibroblast growth factor promotes proliferation of endogenous brain cells in a rat model of severe traumatic brain injury

Wang Tong, Liu Yang, Zhu Yetao
  

  1. Department of Neurosurgery, the Third Hospital of Mianyang/Sichuan Mental Health Center, Mianyang 621000, Sichuan Province, China
  • Revised:2019-03-13 Online:2019-09-08 Published:2019-09-08
  • Contact: Liu Yang, MD, Chief physician, Department of Neurosurgery, the Third Hospital of Mianyang/ Sichuan Mental Health Center, Mianyang 621000, Sichuan Province, China
  • About author:Wang Tong, Master candidate, Department of Neurosurgery, the Third Hospital of Mianyang/ Sichuan Mental Health Center, Mianyang 621000, Sichuan Province, China
  • Supported by:

    Sichuan Provincial Health and Family Planning Commission Support Project, No. 17PJ183 (to LY); Sichuan Medical Association Support Project, No. S16038 (to LY); Mianyang Municipal Health and Family Planning Commission Support Project, No. 201615 (to LY)

Abstract:

BACKGROUND: Either nerve growth factor or basic fibroblast growth factor can promote the self-renewal and differentiation of neural stem cells in vitro. Little has been reported on the effect of the combination of these two factors on endogenous brain cells after traumatic brain injury in adult rats.
OBJECTIVE: To explore the effects of exogenous nerve growth factor and basic fibroblast growth factor on the proliferation of endogenous brain cells in the rats with severe traumatic brain injury.
METHODS: Animal models of traumatic brain injury were made in 48 adult Sprague-Dawley rats using modified Feeney’s method, and then randomized into 4 groups: nerve growth factor, basic fibroblast growth factor, combination (injection of nerve growth factor and basic fibroblast growth factor), and control (normal saline injection) groups. Intraventricular injection of different factors was performed correspondingly at 24 hours after modeling. The restoration of limb function was assessed through behavior observation. BrdU-positive cells in the brain were counted and compared among four groups using immunohistochemical method.
RESULTS AND CONCLUSION: (1) Initially from the 5th day after modeling, the behavioral test scores in the three treatment groups were significantly lower than those in the control group (P < 0.05), and the behavioral test scores in the combination group were significantly lower than those in the nerve growth factor and basic fibroblast growth factor groups (P < 0.05). (2) There were more BrdU-labeled cells in the three treatment groups than the control group (P < 0.05). The number of BrdU-positive cells in the combination group was significantly higher than that in the nerve growth factor and basic fibroblast growth factor groups (P < 0.05). In summary, the proliferation of brain cells and restoration of limb function after traumatic brain injury can be promoted by nerve growth factor or basic fibroblast growth factor. Morever, this effect can be considerably improved by the combination of nerve growth factor and basic fibroblast growth factor.

Key words: traumatic brain injury, neural stem cells, nerve growth factor, basic fibroblast growth factor, BrdU-positive cells, behavioral tests

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