Koo HM, Lee SM, Kim MH. Spontaneous Wheel Running Exercise Induces Brain Recovery via Neurotrophin-3 Expression Following Experimental Traumatic Brain Injury in Rats.
J Phys Ther Sci 2013;
25:1103-7. [PMID:
24259924 PMCID:
PMC3818758 DOI:
10.1589/jpts.25.1103]
[Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Accepted: 04/19/2013] [Indexed: 11/24/2022] Open
Abstract
[Purpose] The aim of the present study was to investigate the expression of
neurotrophin-3 (NT-3) after applying spontaneous wheel running exercises (SWR) after
experimental traumatic brain injury (TBI). [Subjects and Methods] Thirty male
Sprague-Dawley rats were divided into 3 groups; 20 rats were subjected to controlled
cortical impact for TBI, and then, animals were randomly collected from the SWR group and
subjected to wheel running exercise for 3 weeks. Ten rats were not subjected to any injury
or running exercise to compare with the effect of TBI and SWR. Immunohistochemistry,
Western blotting, skilled ladder rung walking test, and 2,3,5-triphenyltetrazolium
chloride staining analysis for the evaluation of NT-3 expression were used to assess brain
damage and recovery. [Results] The TBI-induced decrease in NT-3 expression was recovered
by wheel running exercise. Moreover, decreased ischemic volume and progressive
neurobehavioral outcome were observed in the SWR group. [Conclusion] Spontaneous running
exercise promotes brain recovery and motor function through an increase in expression of
NT-3.
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