Imbalance between GABAergic and Glutamatergic Transmission Impairs Adult Neurogenesis in an Animal Model of Alzheimer's Disease.

TitleImbalance between GABAergic and Glutamatergic Transmission Impairs Adult Neurogenesis in an Animal Model of Alzheimer's Disease.
Publication TypeJournal Article
Year of Publication2009
AuthorsSun B, Halabisky B, Zhou Y, Palop JJ, Yu G, Mucke L, Gan L
JournalCell Stem Cell
Volume5
Issue6
Pagination624-33
Date Published2009 Dec 04
ISSN1875-9777
KeywordsAlzheimer Disease, Amyloid beta-Peptides, Animals, Calcineurin Inhibitors, Cell Differentiation, Dendritic Spines, Disease Models, Animal, GABA-A Receptor Antagonists, Hippocampus, Humans, Mice, Mice, Transgenic, Neurites, Neurogenesis, Pertussis Toxin, Synaptic Transmission, Tacrolimus
Abstract

Adult neurogenesis regulates plasticity and function in the hippocampus, which is critical for memory and vulnerable to Alzheimer's disease (AD). Promoting neurogenesis may improve hippocampal function in AD brains. However, how amyloid beta (Abeta), the key AD pathogen, affects the development and function of adult-born neurons remains unknown. Adult-born granule cells (GCs) in human amyloid precursor protein (hAPP) transgenic mice, an AD model, showed greater dendritic length, spine density, and functional responses than did controls early in development, but were impaired morphologically and functionally during later maturation. Early inhibition of GABA(A) receptors to suppress GABAergic signaling or late inhibition of calcineurin to enhance glutamatergic signaling normalized the development of adult-born GCs in hAPP mice with high Abeta levels. Abeta-induced increases in GABAergic neurotransmission or an imbalance between GABAergic and glutamatergic neurotransmission may contribute to impaired neurogenesis in AD.

DOI10.1016/j.stem.2009.10.003
Alternate JournalCell Stem Cell
PubMed ID19951690
PubMed Central IDPMC2823799
Grant ListNS041787 / NS / NINDS NIH HHS / United States
R01 NS041787 / NS / NINDS NIH HHS / United States
P01 AG004342-140009 / AG / NIA NIH HHS / United States
AG022074 / AG / NIA NIH HHS / United States
P01 AG022074 / AG / NIA NIH HHS / United States
P01 AG004342 / AG / NIA NIH HHS / United States
CO6 RRO18928 / CO / NCI NIH HHS / United States