Voluntary exercise counteracts Aβ25-35-induced memory impairment in mice.
Exercise has been shown to enhance hippocampus-related cognition and slow the progression of Alzheimer's disease (AD). However, whether voluntary exercise directly decreases the neurotoxicity of amyloid peptide (Aβ) needs to be determined. In the present study, two-month old male C57bl/6 mice were intracerebroventricularly injected with Aβ25-35, and then allowed for voluntary exercise for 12 days. Y-maze test revealed that voluntary exercise mitigated spatial memory impairment induced by Aβ25-35. Consistently, Aβ25-35 treated mice with exercise showed reduced neuronal degeneration and synaptic protein loss in the hippocampus compared with sedentary controls. Moreover, voluntary exercise significantly ameliorated oxidative stress markers and increased vessel branches in the hippocampus of Aβ25-35 treated mice. Our results suggest that voluntary exercise counteracts the neurotoxicity of Aβ by reducing oxidative stress and increasing angiogenesis, which may underlie the beneficial effect of exercise on AD.
Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China.
Qin
Q
Wang
Zhiqiang
Z
Xu
Jinrong
J
Tang
Jianguo
J
Sun
Junying
J
Gao
Ting
T
Wu
Ming
M
Xiao
D016229:Amyloid beta-Peptides / Q000494:pharmacology*; D000818:Animals; D006624:Hippocampus / Q000187:drug effects / Q000503:physiopathology*; D008297:Male; D018782:Maze Learning / Q000187:drug effects / Q000502:physiology; D008568:Memory / Q000187:drug effects / Q000502:physiology*; D008569:Memory Disorders / Q000139:chemically induced / Q000628:therapy*; D051379:Mice; D018384:Oxidative Stress / Q000187:drug effects / Q000502:physiology; D010446:Peptide Fragments / Q000494:pharmacology*; D010805:Physical Conditioning, Animal / Q000502:physiology*
D016229:Amyloid beta-Peptides; D010446:Peptide Fragments; C074636:amyloid beta-protein (25-35)
Alzheimer's disease; Amyloid peptide; Angiogenesis; Neurotoxicity; Oxidative stress; Voluntary exercise