Upregulation of cornichon transcripts in the dorsolateral prefrontal cortex in schizophrenia
- 5 December 2012
- journal article
- research article
- Published by Ovid Technologies (Wolters Kluwer Health) in NeuroReport
- Vol. 23 (17), 1031-1034
- https://doi.org/10.1097/wnr.0b013e32835ad229
Abstract
Schizophrenia has been proposed to be associated with abnormal glutamatergic neurotransmission. The AMPA subtype of glutamate receptors (AMPARs) mediates fast excitatory synaptic transmission in the brain, and their trafficking and function is regulated in part by AMPAR auxiliary proteins including the cornichons (CNIH) and transmembrane AMPAR-regulatory proteins. Abnormal regulation of AMPARs through altered expression of these auxiliary proteins could induce changes in glutamatergic neurotransmission and thus the pathophysiology of schizophrenia. In this study, transcript expression of cornichon homologs 1-4 was measured in the dorsolateral prefrontal cortex from schizophrenia (N=25) and comparison (N=25) patient groups by comparative quantitative real-time PCR. Significant upregulation of CNIH-1, CNIH-2, and CNIH-3 mRNA expression was found in schizophrenia, with no change in CNIH-4 expression. To determine the effect of antipsychotic treatment on the expression of these genes, cornichon mRNA expression was assayed in the frontal cortex of rats treated chronically with haloperidol decanoate and no changes in any of the cornichon transcripts were found. Abnormal expression of the CNIH family of genes is consistent with cornichon-mediated AMPAR trafficking abnormalities in schizophrenia, and suggests a new mechanism contributing toward the pathophysiology of this illness.Keywords
This publication has 22 references indexed in Scilit:
- Glutamate Receptor Abnormalities in Schizophrenia: Implications for Innovative TreatmentsBiomolecules & Therapeutics, 2012
- The Expanding Social Network of Ionotropic Glutamate Receptors: TARPs and Other Transmembrane Auxiliary SubunitsNeuron, 2011
- Hippocampal AMPA Receptor Gating Controlled by Both TARP and Cornichon ProteinsNeuron, 2010
- Functional comparison of the effects of TARPs and cornichons on AMPA receptor trafficking and gatingProceedings of the National Academy of Sciences of the United States of America, 2010
- Evidence for Abnormal Forward Trafficking of AMPA Receptors in Frontal Cortex of Elderly Patients with SchizophreniaNeuropsychopharmacology, 2010
- Decreased expression of NMDA receptor-associated proteins in frontal cortex of elderly patients with schizophreniaNeuroReport, 2009
- Functional Proteomics Identify Cornichon Proteins as Auxiliary Subunits of AMPA ReceptorsScience, 2009
- RASD2, MYH9, and CACNG2 Genes at Chromosome 22q12 Associated with the Subgroup of Schizophrenia with Non-Deficit in Sustained Attention and Executive FunctionBiological Psychiatry, 2008
- Homozygosity mapping in a family presenting with schizophrenia, epilepsy and hearing impairmentEuropean Journal of Human Genetics, 2008
- Lamina-specific abnormalities of AMPA receptor trafficking and signaling molecule transcripts in the prefrontal cortex in schizophreniaSynapse, 2006