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Effects of Environmental Enrichment on Doublecortin and BDNF Expression along the Dorso-Ventral Axis of the Dentate Gyrus.

Frontiers in neuroscience (2017-10-03)
Fabio Gualtieri, Catherine Brégère, Grace C Laws, Elena A Armstrong, Nicholas J Wylie, Theo T Moxham, Raphael Guzman, Timothy Boswell, Tom V Smulders
ABSTRACT

Adult hippocampal neurogenesis (AHN) in the dentate gyrus is known to respond to environmental enrichment, chronic stress, and many other factors. The function of AHN may vary across the septo-temporal axis of the hippocampus, as different subdivisions are responsible for different functions. The dorsal pole regulates cognitive-related behaviors, while the ventral pole mediates mood-related responses through the hypothalamic-pituitary-adrenal (HPA) axis. In this study, we investigate different methods of quantifying the effect of environmental enrichment on AHN in the dorsal and ventral parts of the dentate gyrus (dDG and vDG). To this purpose, 11-week-old female CD-1 mice were assigned for 8 days to one of two conditions: the Environmental Enrichment (E) group received (i) running wheels, (ii) larger cages, (iii) plastic tunnels, and (iv) bedding with male urine, while the Control (C) group received standard housing. Dorsal CA (

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TRI Reagent®, For processing tissues, cells cultured in monolayer or cell pellets
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Eukitt® Quick-hardening mounting medium, for microscopy
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SIGMAFAST 3,3′-Diaminobenzidine tablets, tablet, To prepare 5 mL