Synaptic remodeling in the dentate gyrus, CA3, CA1, subiculum, and entorhinal cortex of mice: effects of deprived rearing and voluntary running.
Hippocampal cell proliferation is strongly increased and synaptic turnover decreased after rearing under social and physical deprivation in gerbils (Meriones unguiculatus). We examined if a similar epigenetic effect of rearing environment on adult neuroplastic responses can be found in mice (Mus musculus). We examined synaptic turnover rates in the dentate gyrus, CA3, CA1, subiculum, and entorhinal cortex. No direct effects of deprived rearing on rates of synaptic turnover were found in any of the studied regions. However, adult wheel running had the effect of leveling layer-specific differences in synaptic remodeling in the dentate gyrus, CA3, and CA1, but not in the entorhinal cortex and subiculum of animals of both rearing treatments. Epigenetic effects during juvenile development affected adult neural plasticity in mice, but seemed to be less pronounced than in gerbils.
Department of Biology, Bielefeld University, Bielefeld, Germany. aschaefers@uni-bielefeld.de
Andrea T U
AT
Schaefers
Keren
K
Grafen
Gertraud
G
Teuchert-Noodt
York
Y
Winter
D000375:Aging; D000818:Animals; D056547:CA1 Region, Hippocampal / Q000502:physiology; D056654:CA3 Region, Hippocampal / Q000502:physiology; D018891:Dentate Gyrus / Q000502:physiology; D018728:Entorhinal Cortex / Q000502:physiology*; D004777:Environment; D006624:Hippocampus / Q000502:physiology*; D006799:Housing, Animal; D008247:Lysosomes / Q000378:metabolism; D008297:Male; D008426:Maternal Deprivation; D051379:Mice; D009043:Motor Activity / Q000502:physiology*; D009473:Neuronal Plasticity / Q000502:physiology*; D009474:Neurons / Q000502:physiology; D017966:Pyramidal Cells / Q000502:physiology; D013569:Synapses / Q000502:physiology*