期刊
MOLECULAR PSYCHIATRY
卷 27, 期 12, 页码 5154-5166出版社
SPRINGERNATURE
DOI: 10.1038/s41380-022-01777-3
关键词
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资金
- National Key Research and Development Program of China [2021ZD0201703]
- National Nature Science Foundation of China (NSFC) [32070964, 31871045, 31970921, 31921003, 81971309, 32170980]
- Guangdong Basic and Applied Basic Research Foundation [2019A1515011333]
- Shenzhen Fundamental Research Program [JCYJ20190809161405495, JCYJ20210324123212035, RCYX20200714114644167]
- Zhejiang Provincial Natural Science Foundation of China [LR19C090001]
A previously unidentified pathological phenotype of excessive branching in oligodendrocyte precursor cells (OPCs) has been detected in schizophrenia patients. These pathological OPCs hyperactivate the Wnt/beta-catenin pathway, leading to abnormal synaptic formation and neuronal activity, which drive the onset of schizophrenic phenotype. Suppressing Wnt Inhibitory Factor 1 (Wif1) in OPCs rescues synaptic loss and behavioral disorders in mice expressing the DISC1-Delta 3 gene.
Although the link of white matter to pathophysiology of schizophrenia is documented, loss of myelin is not detected in patients at the early stages of the disease, suggesting that pathological evolution of schizophrenia may occur before significant myelin loss. Disrupted-in-schizophrenia-1 (DISC1) protein is highly expressed in oligodendrocyte precursor cells (OPCs) and regulates their maturation. Recently, DISC1-Delta 3, a major DISC1 variant that lacks exon 3, has been identified in schizophrenia patients, although its pathological significance remains unknown. In this study, we detected in schizophrenia patients a previously unidentified pathological phenotype of OPCs exhibiting excessive branching. We replicated this phenotype by generating a mouse strain expressing DISC1-Delta 3 gene in OPCs. We further demonstrated that pathological OPCs, rather than myelin defects, drive the onset of schizophrenic phenotype by hyperactivating OPCs' Wnt/beta-catenin pathway, which consequently upregulates Wnt Inhibitory Factor 1 (Wif1), leading to the aberrant synaptic formation and neuronal activity. Suppressing Wif1 in OPCs rescues synaptic loss and behavioral disorders in DISC1-Delta 3 mice. Our findings reveal the pathogenetic role of OPC-specific DISC1-Delta 3 variant in the onset of schizophrenia and highlight the therapeutic potential of Wif1 as an alternative target for the treatment of this disease.
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