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OBJECTIVE: The authors' goals were to establish the cellular origin of the reduced cortical reelin expression that occurs in schizophrenia and to relate it to markers of synaptic pathology. METHOD: In situ hybridization was used to quantify reelin mRNA in the hippocampal formation and dorsolateral prefrontal cortex of brains from 13 subjects with schizophrenia and 12 subjects without schizophrenia. Results were correlated with the expression of three synaptic protein genes in the dentate gyrus. RESULTS: Reelin mRNA was expressed by layer I neurons, interneurons, and interstitial white matter neurons. In subjects with schizophrenia, less reelin mRNA was expressed by interstitial white matter neurons in the hippocampal formation and by all three cell types in the prefrontal cortex. Reelin and synaptic protein expression correlated positively. CONCLUSIONS: Interstitial white matter neurons, presumed remnants of the cortical subplate, contribute to the reduction in reelin mRNA in schizophrenia. Down-regulation of reelin expression may in turn contribute to the synaptic pathology of the disorder.

Original publication

DOI

10.1176/appi.ajp.163.3.540

Type

Journal article

Journal

Am J Psychiatry

Publication Date

03/2006

Volume

163

Pages

540 - 542

Keywords

Cell Adhesion Molecules, Neuronal, Cerebral Cortex, Dentate Gyrus, Down-Regulation, Extracellular Matrix Proteins, Female, GAP-43 Protein, Gene Expression, Hippocampus, Humans, Interneurons, Male, Middle Aged, Nerve Tissue Proteins, Neurons, Parahippocampal Gyrus, Prefrontal Cortex, RNA, Messenger, Schizophrenia, Serine Endopeptidases, Synaptophysin, Vesicular Glutamate Transport Protein 1