Evidence map›Paper›PMID 18644839›Full record

ArticleFASEB journal : official publication of the Federation of American Societies for Experimental Biology2008

MMP-7 cleaves the NR1 NMDA receptor subunit and modifies NMDA receptor function.

Arek Szklarczyk, Osefame Ewaleifoh, Jean-Claude Beique, Yue Wang, David Knorr, Norman Haughey, Tanya Malpica, Mark P Mattson, Richard Huganir, Katherine Conant

Open access · greenAbstract read
In one paragraph

Article in FASEB journal : official publication of the Federation of American Societies for Experimental Biology, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed
1.4field-weighted citation impact, top 16% 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

28 citing papers in PubMed, 47 citations in OpenAlex.

  1. Review
  2. Matrix Metalloproteases as Influencers of the Cells' Social Media.International journal of molecular sciences · 2019
    Review
  3. MMPs in learning and memory and neuropsychiatric disorders.Cellular and molecular life sciences : CMLS · 2019
    Review
  4. Matrix metalloproteinases in the CNS: interferons get nervous.Cellular and molecular life sciences : CMLS · 2019
    Review
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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

10 authors at 3 institutions in 1 country.

Arek SzklarczykJohns Hopkins University, Department of Neurology, Pathology Bldg. Rm. 625, 600 N. Wolfe St., Baltimore, MD 21287, USA.
Osefame Ewaleifoh
Jean-Claude Beique
Yue Wang
David Knorr
Norman Haughey
Tanya Malpica
Mark P Mattson
Richard Huganir
Katherine Conant
Johns Hopkins Medicine · USNational Institute on Aging · USJohns Hopkins University · US

Funding

Mechanisms of Neuroinflammation in HANDR01MH077542 · NIMH · JOHNS HOPKINS UNIVERSITY · PI HAUGHEY, NORMAN J · 2007 to 2016
$3.4M
HIV Associated CNS Dysfunction with AgingR01AG023471 · NIA · JOHNS HOPKINS UNIVERSITY · PI HAUGHEY, NORMAN J · 2003 to 2007
$1.8M
MMPs and Synaptic Injury with HIV/METHR21DA024447 · NIDA · JOHNS HOPKINS UNIVERSITY · PI CONANT, KATHERINE E · 2007 to 2008
$442k
HIV Mediated Dysfunction of Neural Progenitor CellsR21MH072534 · NIMH · JOHNS HOPKINS UNIVERSITY · PI HAUGHEY, NORMAN J · 2005 to 2006
$421k
Perturbation of amyloid processing in HANDR21AG034849 · NIA · JOHNS HOPKINS UNIVERSITY · PI HAUGHEY, NORMAN J · 2010 to 2011
$377k
MMPs in neural networkingR21NS052580 · NINDS · JOHNS HOPKINS UNIVERSITY · PI CONANT, KATHERINE E · 2005 to 2006
$373k
NIA NIH HHS R01 AG023471NIA NIH HHS R21 AG034849NIDA NIH HHS DA024447NIDA NIH HHS R21 DA024447NIMH NIH HHS R01 MH077542NIMH NIH HHS R21 MH072534NINDS NIH HHS NS052580NINDS NIH HHS R21 NS052580
6 · The paper itself

Abstract

Matrix metalloproteinases (MMPs) are zinc-dependent enzymes that play a role in the inflammatory response. These enzymes have been well studied in the context of cancer biology and inflammation. Recent studies, however, suggest that these enzymes also play roles in brain development and neurodegenerative disease. Select MMPs can target proteins critical to synaptic structure and neuronal survival, including integrins and cadherins. Here, we show that one member of the MMP family, MMP-7, which may be released from cells, including microglia, can target a protein critical to synaptic function. Through analysis of extracts from murine cortical slice preparations, we show that MMP-7 cleaves the NR1 subunit of the N-methyl-d-aspartate (NMDA) receptor to generate an N-terminal fragment of approximately 65 kDa. Moreover, studies with recombinant protein show that MMP-7-mediated cleavage of NR1 occurs at amino acid 517, which is extracellular and just distal to the first transmembrane domain. Data suggest that NR2A, which shares sequence homology with NR1, is also cleaved following treatment of slices with MMP-7, while select AMPA receptor subunits are not. Consistent with a potential effect of MMP-7 on ligand binding, additional experiments demonstrate that NMDA-mediated calcium flux is significantly diminished by MMP-7 pretreatment of cultures. In addition, the AMPA/NMDA ratio is increased by MMP-7 pretreatment. These data suggest that synaptic function may be altered in neurological conditions associated with increased levels of MMP-7.

Indexed as

AnimalsBrain ChemistryCalcium SignalingCells, CulturedHumansInflammationMatrix Metalloproteinase 7MiceMicrogliaNeoplasmsProtein Structure, TertiaryRatsRats, Sprague-DawleyReceptors, N-Methyl-D-AspartateRecombinant ProteinsMatrix Metalloproteinase 7MMP7 protein, humanNR1 NMDA receptorReceptors, N-Methyl-D-AspartateRecombinant Proteins

Identifiers

PMID18644839
PMCPMC2574025
OpenAlexW2097769598

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.