Cited by 155Neurogenesis and neuroplasticity mechanismsSchizophrenia research and treatmentGenomic variations and chromosomal abnormalities

Reduced Adult Hippocampal Neurogenesis and Working Memory Deficits in the Dgcr8-Deficient Mouse Model of 22q11.2 Deletion-Associated Schizophrenia Can Be Rescued by IGF2

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Ouchi, Yasuo, Banno, Yuya, Shimizu, Yuko, Ando, Shouta, Hasegawa, Hitoki, Adachi, Koichi, Iwamoto, Takashi·2013·The Journal of Neuroscience

Abstract

DiGeorge syndrome chromosomal region 8 (Dgcr8), a candidate gene for 22q11.2 deletion-associated schizophrenia, encodes an essential component for microRNA (miRNA) biosynthesis that plays a pivotal role in hippocampal learning and memory. Adult neurogenesis is known to be important in hippocampus-dependent memory, but the role and molecular mechanisms of adult neurogenesis in schizophrenia remain unclear. Here, we show that Dgcr8 heterozygosity in mice leads to reduced cell proliferation and neurogenesis in adult hippocampus, as well as impaired hippocampus-dependent learning. Several schizophrenia-associated genes were downregulated in the hippocampus of Dgcr8+/−mice, and one of them, insulin-like growth factor 2 (Igf2), rescued the proliferation of adult neural stem cells both in vitro and in vivo. Furthermore, IGF2 improved the spatial working memory deficits in Dgcr8+/−mice. These data suggest that defective adult neurogenesis contributes to the cognitive impairment observed in 22q11.2 deletion-associated schizophrenia and could be rectified by IGF2.

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Authors
Ouchi, Y., Banno, Y., Shimizu, Y., Ando, S., Hasegawa, H., Adachi, K., & Iwamoto, T.
Affiliations
  • Chubu University (JP)
  • Nagoya University (JP)
Venue
The Journal of Neuroscience
Published
2013-05-29
Volume
33
Issue
22
Pages
9408-9419
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2150056340
Cited by
155
References
43
Citations by year
2026: 3 · 2025: 9 · 2024: 6 · 2023: 5 · 2022: 12 · 2021: 14 · 2020: 18 · 2019: 9 · 2018: 10 · 2017: 16 · 2016: 20 · 2015: 15 · 2014: 16 · 2013: 2
FWCI
6.56
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomic variations and chromosomal abnormalities
Keywords
DGCR8, 22q11.2 deletion syndrome, schizophrenia, adult hippocampal neurogenesis, insulin-like growth factor II, neural stem cell proliferation, spatial working memory, hippocampus-dependent learning, cognitive impairment
MeSH terms
Animals, Antimetabolites, Bromodeoxyuridine, Female, Hippocampus, Immunohistochemistry, Insulin-Like Growth Factor II, Male, Memory Disorders, Memory, Short-Term, Motor Activity, Nesting Behavior, Proteins, RNA, Schizophrenia, Schizophrenic Psychology, Swimming, Blotting, Western, RNA-Binding Proteins, Gene Deletion, Mice, Knockout, Maze Learning, Microarray Analysis, Cell Proliferation, Mice, Neurogenesis, Neural Stem Cells, Real-Time Polymerase Chain Reaction

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