Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Effects of Treadmill Exercise on Memory, Hippocampal Cell Proliferation, BDNF, TrkB, and Forebrain Cholinergic Cells in Adolescent Rats

트레드밀 운동이 청소년기 흰쥐의 기억력과 해마 신경세포생성, BDNF, TrkB, 그리고 전뇌 콜린 세포에 미치는 영향

  • Lee, Hee-Hyuk (Department of Sports Science, Hannam University)
  • 이희혁 (한남대학교 생활체육학과)
  • Published : 2009.03.31
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Abstract

This study investigated the effects of treadmill exercise on memory ability, cell proliferation, BDNF, and TrkB in the hippocampus and forebrain cholinergic cells in adolescent rats. Male Sprague-Dawley rats (4 weeks old) were randomly assigned to the following two groups: the sedentary group (n=10) and the exercise group (n=10). Rats in the exercise group were forced to run on a treadmill for 30 min, five times per week for 4 weeks. The latency of the step-through avoidance task was used in order to evaluate memory ability. Hippocampal brain-derived neurotrophic factor (BDNF) and tropomyosin-related kinase B (TrkB) expression were assessed by Western blotting. Hippocampal cell proliferation and forebrain cholinergic cells were assessed by immunohistochemistry. The present study showed that treadmill running during the adolescent period significantly improved memory capability, increased hippocampal cell proliferation, up-regulated hippocampal BDNF and TrkB expression, and enhanced the number of forebrain cholinergic cells. These results suggest that regular exercise during the adolescent period may enhance memory function.

본 연구는 청소년기 흰쥐를 대상으로 4주간의 저강도 트레드밀 운동이 기억력과 해마 신경세포생성, BDNF, Trkb, 중격 콜린세포에 미치는 효과를 조사하기 위하여 수행되었다. 먼저 운동이 기억력에 미치는 효과를 step-through avoidance에서 검사한 결과 운동을 실시했던 흰쥐의 retention latency가 대조군에 비해 유의하게 증가되어 기억력 향상을 나타내었다. 이후 기억력 향상기전으로 해마에서 신경세포증식과 BDNF 및 TrkB 단백질 발현을 정량화 한 결과에서도 운동군의 신경세포 생성율과 BDNF와 TrkB 단백질 발현 모두 대조군에 비해 유의하게 증가된 것으로 나타났다. 게다가 운동을 통한 전뇌 콜린세포 수의 증가가 해마 신경세포생성과 BDNF 발현 증가에 기여하는 것으로 나타났다. 이러한 결과는 청소년기 운동이 기억력 향상에 도움이 될 수 있음을 보여주는 것이다.

Keywords

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