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
Open accessAbstract
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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IGF2 was the most strongly down-regulated gene, with a 1.33-fold change.
“Insulin-like growth factor 2 (IGF2), the most strongly down-regulated gene (1.33-fold, Fig. 5D), can rescue neurogenesis and cognitive deficits in certain mouse models of schizophrenia44.”
From Gene expression elucidates functional impact of polygenic risk for schizophrenia (2016) · cites this paper as [44]
IGF2 can rescue neurogenesis and cognitive deficits in certain mouse models of schizophrenia.
“can rescue neurogenesis and cognitive deficits in certain mouse models of schizophrenia44”
From Gene expression elucidates functional impact of polygenic risk for schizophrenia (2016) · cites this paper as [44]
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Gene expression elucidates functional impact of polygenic risk for schizophrenia
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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
- Publisher
- Society for Neuroscience
- Published
- 2013-05-29
- Volume
- 33
- Issue
- 22
- Pages
- 9408-9419
- ISSN
- 0270-6474 (ISSN-L)
- 1529-2401
- PMC
- PMC6618567
- 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
- hybrid
- doi.org
- Licence
- 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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