Role of adult-born granule cells in the hippocampal functions: Focus on the GluN2B-containing NMDA receptors

European Neuropsychopharmacology : the Journal of the European College of Neuropsychopharmacology
Julie DoanLaurent Tritschler

Abstract

Adult-born granule cells constitute a small subpopulation of the dentate gyrus (DG) in the hippocampus. However, they greatly influence several hippocampus-dependent behaviors, suggesting that adult-born granule cells have specific roles that influence behavior. In order to understand how exactly these adult-born granule cells contribute to behavior, it is critical to understand the underlying electrophysiology and neurochemistry of these cells. Here, this review simultaneously focuses on the specific electrophysiological properties of adult-born granule cells, relying on the GluN2B subunit of NMDA glutamate receptors, and how it influences neurochemistry throughout the brain. Especially in a critical age from 4 to 6 weeks post-division during which they modulate hippocampal functions, adult-born granule cells exhibit a higher intrinsic excitability and an enhanced long-term potentiation. Their stimulation decreases the overall excitation/inhibition balance of the DG via recruitment of local interneurons, and in the CA3 region of the hippocampus. However, the link between neurochemical effects of adult-born granule cells and behavior remain to be further examined.

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Citations

Apr 4, 2021·Brain Sciences·Yosef Avchalumov, Chitra D Mandyam
Apr 28, 2021·Hippocampus·Rachel E KeithTheodore C Dumas
Feb 29, 2020·Pharmacology & Therapeutics·Cilene Lino de OliveiraCatherine Belzung

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