Evidence map›Paper›PMID 25918374›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2015

Synaptic abnormalities and cytoplasmic glutamate receptor aggregates in contactin associated protein-like 2/Caspr2 knockout neurons.

Olga Varea, Maria Dolores Martin-de-Saavedra, Katherine J Kopeikina, Britta Schürmann, Hunter J Fleming, Jessica M Fawcett-Patel, Anthony Bach, Seil Jang, Elior Peles, Eunjoon Kim and 1 more

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 86 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
86citing papers in PubMed, 2 pooled it
6.9field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

86 citing papers in PubMed, 2 syntheses or guidelines pooled it, 142 citations in OpenAlex.

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26 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors at 3 institutions in 3 countries.

Olga VareaDepartments of Physiology and.
Maria Dolores Martin-de-SaavedraDepartments of Physiology and.
Katherine J KopeikinaDepartments of Physiology and.
Britta SchürmannDepartments of Physiology and.
Hunter J FlemingDepartments of Physiology and.
Jessica M Fawcett-PatelDepartments of Physiology and.
Anthony BachDepartments of Physiology and.
Seil JangDepartment of Neuroscience, Korea Advanced Institute of Science and Technology, 305-701 Daejeon, South Korea;
Elior PelesDepartment of Molecular Cell Biology, Weizmann Institute of Science, 76100 Rehovot, Israel.
Eunjoon KimDepartment of Neuroscience, Korea Advanced Institute of Science and Technology, 305-701 Daejeon, South Korea; Center for Synaptic Brain Dysfunctions, Institute of Basic Science, 305-701 Daejeon, South Korea; and.
Peter PenzesDepartments of Physiology and Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL 60611; p-penzes@northwestern.edu.
Korea Advanced Institute of Science and Technology · KRNorthwestern University · USWeizmann Institute of Science · IL

Funding

Tumor Environment and Metastasis (TEAM) Research ProgramP30CA060553 · NCI · NORTHWESTERN UNIVERSITY AT CHICAGO · PI Daniela E Matei · 1993 to 2026
$153.9M
Synaptic and dendritic dysfunction in psychiatric disordersR01MH097216 · NIMH · NORTHWESTERN UNIVERSITY AT CHICAGO · PI PENZES, PETER · 2012 to 2021
$6.1M
Role of three novel CAMs in myelinating gliaR01NS050220 · NINDS · WEIZMANN INSTITUTE OF SCIENCE · PI PELES, ELIOR · 2005 to 2015
$1.6M
Nikon Super-Resolution Structured Illumination Microscope (SIM)S10OD016342 · OD · NORTHWESTERN UNIVERSITY AT CHICAGO · PI CHEW, TENG-LEONG · 2013 to 2013
$600k
NCI NIH HHS P30 CA060553NIH HHS 1S10OD016342-01NIH HHS S10 OD016342NIMH NIH HHS MH097216NIMH NIH HHS R01 MH097216NINDS NIH HHS NS50220NINDS NIH HHS R01 NS050220
6 · The paper itself

Abstract

Central glutamatergic synapses and the molecular pathways that control them are emerging as common substrates in the pathogenesis of mental disorders. Genetic variation in the contactin associated protein-like 2 (CNTNAP2) gene, including copy number variations, exon deletions, truncations, single nucleotide variants, and polymorphisms have been associated with intellectual disability, epilepsy, schizophrenia, language disorders, and autism. CNTNAP2, encoded by Cntnap2, is required for dendritic spine development and its absence causes disease-related phenotypes in mice. However, the mechanisms whereby CNTNAP2 regulates glutamatergic synapses are not known, and cellular phenotypes have not been investigated in Cntnap2 knockout neurons. Here we show that CNTNAP2 is present in dendritic spines, as well as axons and soma. Structured illumination superresolution microscopy reveals closer proximity to excitatory, rather than inhibitory synaptic markers. CNTNAP2 does not promote the formation of synapses and cultured neurons from Cntnap2 knockout mice do not show early defects in axon and dendrite outgrowth, suggesting that CNTNAP2 is not required at this stage. However, mature neurons from knockout mice show reduced spine density and levels of GluA1 subunits of AMPA receptors in spines. Unexpectedly, knockout neurons show large cytoplasmic aggregates of GluA1. Here we characterize, for the first time to our knowledge, synaptic phenotypes in Cntnap2 knockout neurons and reveal a novel role for CNTNAP2 in GluA1 trafficking. Taken together, our findings provide insight into the biological roles of CNTNAP2 and into the pathogenesis of CNTNAP2-associated neuropsychiatric disorders.

Indexed as

AnimalsAxonsCells, CulturedCoculture TechniquesCytoplasmGene Expression Regulation, DevelopmentalGenotypeGreen Fluorescent ProteinsHEK293 CellsHumansMembrane ProteinsMiceMice, KnockoutMicroscopy, ConfocalMicroscopy, FluorescenceNerve Tissue ProteinsCNTNAP2 protein, mouseGreen Fluorescent ProteinsMembrane ProteinsNerve Tissue ProteinsReceptors, AMPAReceptors, GlutamateAMPACNTNAP2GluA1schizophreniasynapse

Identifiers

PMID25918374
PMCPMC4434727
OpenAlexW2094421200

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.