skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Complexin2 modulates working memory-related neural activity in patients with schizophrenia

Journal Article · · European Archives of Psychiatry and Clinical Neuroscience
 [1];  [1];  [2];  [3];  [4];  [1];  [5];  [6];  [6];  [7];  [4]
  1. Faculty of Medicine Carl Gustav Carus of the Technische Univ. Dresden, Dresden (Germany)
  2. Univ. of Leipzig, Leipzig (Germany)
  3. The MIND Research Network, Albuquerque, NM (United States)
  4. Faculty of Medicine Carl Gustav Carus of the Technische Univ. Dresden, Dresden (Germany); Massachusetts General Hospital, Charlestown, MA (United States); Massachusetts General Hospital, Boston, MA (United States)
  5. Univ. of Minnesota, Minneapolis, MN (United States)
  6. Massachusetts General Hospital, Charlestown, MA (United States); Massachusetts General Hospital, Boston, MA (United States)
  7. The MIND Research Network, Albuquerque, NM (United States); Univ. of New Mexico, Albuquerque, NM (United States)

The specific contribution of risk or candidate gene variants to the complex phenotype of schizophrenia is largely unknown. Studying the effects of such variants on brain function can provide insight into disease-associated mechanisms on a neural systems level. Previous studies found common variants in the complexin2 (CPLX2) gene to be highly associated with cognitive dysfunction in schizophrenia patients. Similarly, cognitive functioning was found to be impaired in Cplx2 gene-deficient mice if they were subjected to maternal deprivation or mild brain trauma during puberty. Here, we aimed to study seven common CPLX2 single-nucleotide polymorphisms (SNPs) and their neurogenetic risk mechanisms by investigating their relationship to a schizophrenia-related functional neuroimaging intermediate phenotype. In this paper, we examined functional MRI and genotype data collected from 104 patients with DSM-IV-diagnosed schizophrenia and 122 healthy controls who participated in the Mind Clinical Imaging Consortium study of schizophrenia. Seven SNPs distributed over the whole CPLX2 gene were tested for association with working memory-elicited neural activity in a frontoparietal neural network. Three CPLX2 SNPs were significantly associated with increased neural activity in the dorsolateral prefrontal cortex and intraparietal sulcus in the schizophrenia sample, but showed no association in healthy controls. Finally, since increased working memory-related neural activity in individuals with or at risk for schizophrenia has been interpreted as ‘neural inefficiency,’ these findings suggest that certain variants of CPLX2 may contribute to impaired brain function in schizophrenia, possibly combined with other deleterious genetic variants, adverse environmental events, or developmental insults.

Research Organization:
Univ. of New Mexico, Albuquerque, NM (United States); The MIND Research Network, Albuquerque, NM (United States); Massachusetts General Hospital, Boston, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Inst. of Health (NIH) (United States)
Contributing Organization:
Faculty of Medicine Carl Gustav Carus of the Technische Univ. Dresden, Dresden (Germany); Univ. of Leipzig, Leipzig (Germany); Massachusetts General Hospital, Charlestown, MA (United States); Univ. of Minnesota, Minneapolis, MN (United States)
Grant/Contract Number:
FG02-99ER62764; NIH/NCRR P41RR14075
OSTI ID:
1343437
Journal Information:
European Archives of Psychiatry and Clinical Neuroscience, Vol. 265, Issue 2; ISSN 0940-1334
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

References (57)

Twin studies of schizophrenia: From bow-and-arrow concordances to Star Wars Mx and functional genomics journal April 2000
A Critical Review of Recent Adoption, Twin, and Family Studies of Schizophrenia: Behavioral Genetics Perspectives journal January 1976
Communications to the editor journal January 1983
Schizophrenia: A neural diathesis-stress model. journal January 1997
Genetic and non-genetic vulnerability factors in schizophrenia: the basis of the “Two hit hypothesis” journal November 1999
Schizophrenia genes, gene expression, and neuropathology: on the matter of their convergence journal July 2004
Synaptic Dysfunction in Schizophrenia book January 2012
Structurally and functionally unique complexins at retinal ribbon synapses journal May 2005
For Better or for Worse: Complexins Regulate SNARE Function and Vesicle Fusion journal September 2008
Reduced hippocampal LTP in mice lacking a presynaptic protein: complexin II journal July 1999
Proteome analysis of human substantia nigra in Parkinson's disease journal December 2004
Early changes in Huntington’s disease patient brains involve alterations in cytoskeletal and synaptic elements journal September 2004
Selective loss of synaptic proteins in Alzheimer's disease: Evidence for an increased severity with APOE ɛ4 journal December 2006
Hippocampal synaptic pathology in schizophrenia, bipolar disorder and major depression: a study of complexin mRNAs journal June 2000
Hippocampal Complexin Proteins and Cognitive Dysfunction in Schizophrenia journal March 2005
No association of complexin1 and complexin2 genes with schizophrenia in a Japanese population journal February 2006
Association study of polymorphisms in synaptic vesicle-associated genes, SYN2 and CPLX2, with schizophrenia journal August 2005
Decreased expression of vesicular glutamate transporter 1 and complexin II mRNAs in schizophrenia: further evidence for a synaptic pathology affecting glutamate neurons journal March 2005
Animal models of gene–environment interactions in schizophrenia journal December 2009
Vulnerability of synaptic plasticity in the complexin II knockout mouse to maternal deprivation stress journal September 2005
Modification of Cognitive Performance in Schizophrenia by Complexin 2 Gene Polymorphisms journal September 2010
Genetic insight of schizophrenia: past and future perspectives journal February 2014
Structural disconnectivity in schizophrenia: a diffusion tensor magnetic resonance imaging study journal May 2003
Reduced Prefrontal-Parietal Effective Connectivity and Working Memory Deficits in Schizophrenia journal January 2012
A New Role for Endophenotypes in the GWAS Era: Functional Characterization of Risk Variants journal January 2010
Striatal function in relation to negative symptoms in schizophrenia journal July 2011
The MCIC Collection: A Shared Repository of Multi-Modal, Multi-Site Brain Image Data from a Clinical Investigation of Schizophrenia journal June 2013
Schizophrenic subjects activate dorsolateral prefrontal cortex during a working memory task, as measured by fMRI journal May 1999
MTHFR 677C -> T genotype disrupts prefrontal function in schizophrenia through an interaction with COMT 158Val -> Met journal November 2008
Whole Brain Segmentation journal January 2002
The COMT Val108/158Met polymorphism and medial temporal lobe volumetry in patients with schizophrenia and healthy adults journal November 2010
Multi-site characterization of an fMRI working memory paradigm: Reliability of activation indices journal October 2010
Advances in functional and structural MR image analysis and implementation as FSL journal January 2004
Temporal Autocorrelation in Univariate Linear Modeling of FMRI Data journal December 2001
Regions of interest analysis in pharmacological fMRI: How do the definition criteria influence the inferred result? journal March 2008
Data quality control in genetic case-control association studies journal August 2010
PLINK: A Tool Set for Whole-Genome Association and Population-Based Linkage Analyses journal September 2007
A Flexible and Accurate Genotype Imputation Method for the Next Generation of Genome-Wide Association Studies journal June 2009
Population Structure and Eigenanalysis journal January 2006
Principal components analysis corrects for stratification in genome-wide association studies journal July 2006
Les facteurs de risque environnementaux de la schizophrénie journal February 2013
Abnormal fMRI Response of the Dorsolateral Prefrontal Cortex in Cognitively Intact Siblings of Patients With Schizophrenia journal April 2003
Working memory and DLPFC inefficiency in schizophrenia: The FBIRN study journal January 2009
Abnormal Frontostriatal Interactions in People With Prodromal Signs of Psychosis: A Multimodal Imaging Study journal July 2010
Altered Small-World Brain Networks in Schizophrenia Patients during Working Memory Performance journal June 2012
Imaging Genetic Liability to Schizophrenia: Systematic Review of fMRI Studies of Patients' Nonpsychotic Relatives journal June 2008
An fMRI study of working memory in first-degree unaffected relatives of schizophrenia patients journal September 2008
Left dorsolateral prefrontal cortex dysfunction in medication-naive schizophrenia journal October 2010
Hyperactivity and hyperconnectivity of the default network in schizophrenia and in first-degree relatives of persons with schizophrenia journal January 2009
Beyond hypofrontality: A quantitative meta-analysis of functional neuroimaging studies of working memory in schizophrenia journal January 2005
Synaptic Plasticity and Dysconnection in Schizophrenia journal May 2006
Does your gene need a background check? How genetic background impacts the analysis of mutations, genes, and evolution journal June 2013
Prenatal and perinatal risk factors for schizophrenia, affective psychosis, and reactive psychosis of early onset: case-control study   Prenatal and perinatal risk factors for early onset schizophrenia, affective psychosis, and reactive psychosis journal February 1999
Prenatal maternal infection, neurodevelopment and adult schizophrenia: a systematic review of population-based studies journal April 2012
Investigating the Neurodevelopmental Hypothesis of Schizophrenia journal September 2005
Altered immunoreactivity of complexin protein in prefrontal cortex in severe mental illness journal June 2002
Chlorpromazine Equivalent Doses for the Newer Atypical Antipsychotics journal June 2003

Cited By (3)

MIR137 polygenic risk is associated with schizophrenia and affects functional connectivity of the dorsolateral prefrontal cortex journal June 2019
From the Cover: Proteome Profile of Different Rat Brain Regions After Sarin Intoxication journal August 2017
Inter-tissue coexpression network analysis reveals DPP4 as an important gene in heart to blood communication journal February 2016