Evidence map›Paper›PMID 17179173›Full record

ArticleAnnals of the rheumatic diseases2007

Inhibition of interleukin 1-induced matrix metalloproteinase 13 expression in human chondrocytes by interferon gamma.

R Ahmad, H Y Qureshi, M El Mabrouk, J Sylvester, M Ahmad, M Zafarullah

Open access · bronzeAbstract read
In one paragraph

Article in Annals of the rheumatic diseases, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
0.6field-weighted citation impact, top 33% 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

15 citing papers in PubMed, 1 synthesis or guideline pooled it, 28 citations in OpenAlex.

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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

6 authors at 3 institutions in 2 countries.

R AhmadK-5255 Mailloux, Hôpital Notre-Dame du CHUM, 1560 Sherbrooke East, Montréal, Québec, Canada H2L 4M1. muhammad.zafarullah@umontreal.ca
H Y Qureshi
M El Mabrouk
J Sylvester
M Ahmad
M Zafarullah
Université de Montréal · CAHôpital Notre-Dame · CAEmory University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDespite well-documented immunomodulation by interferon gamma (IFNgamma), its role and mechanism of regulation of matrix metalloproteinase 13 (MMP13) gene expression in human chondrocytes is unknown.

objectiveTo investigate the ability and mechanism of IFNgamma to suppress interleukin 1 (IL1)-induced MMP13 expression in articular chondrocytes.

methodsHuman chondrocytes were treated with IFNgamma or IL1beta alone or in combination. MMP13 mRNA was analysed by semiquantitative reverse transcriptase-PCR. MMP13 protein, phospho-signal transducer and activator of transcription 1 (STAT1) and p44/42 mitogen-activated protein kinase levels were measured by western blotting. MMP13 promoter luciferase, cytomegalovirus cyclic AMP response element-binding protein (CBP)/p300 plasmids and STAT1 small interfering RNA (siRNA) were transfected by the calcium phosphate method. IFNgamma receptor was also neutralised. Activator protein (AP) 1 activity was monitored by the TransAM transcription factor kit. STAT1-CBP/p300 interaction was studied by immunoprecipitation.

resultsIFNgamma potently suppressed IL1-induced expression of MMP13 and promoter activity. Blockade with neutralising IFNgamma R1 antibody revealed that MMP13 inhibition by IFNgamma is mediated by the IFN receptor. IFNgamma-stimulated activation of STAT1 was directly correlated with MMP13 suppression. Knockdown of the STAT1 gene by specific siRNA or its inhibition with fludarabine partially restored the IL1beta induction of MMP13 expression and promoter activity. IFNgamma did not alter AP1 binding ability but promoted physical interaction of STAT1 and CBP/p300 coactivator. p300 overexpression reversed IFNgamma inhibition of endogenous MMP13 mRNA expression and exogenous MMP13 promoter activity.

conclusionIFNgamma, through its receptor, activates STAT1, which binds with CBP/p300 coactivator, sequesters it from the cell system, and thus inhibits transcriptional induction of the MMP13 gene in chondrocytes. IFNgamma and its signalling pathways could be targeted therapeutically for diminishing IL1-induced cartilage degradation by MMP13 in patients with arthritis.

Indexed as

Blotting, WesternCartilage, ArticularChondrocytesE1A-Associated p300 ProteinGene Expression Regulation, EnzymologicHumansInterferon-gammaInterferon gamma ReceptorInterleukin-1betaKnee JointMatrix Metalloproteinase 13PeptidesPhosphorylationPromoter Regions, GeneticReceptors, InterferonReverse Transcriptase Polymerase Chain ReactionAP1 peptideE1A-Associated p300 ProteinEP300 protein, humanInterferon-gammaInterferon gamma ReceptorInterleukin-1betaMatrix Metalloproteinase 13PeptidesReceptors, InterferonRNA, MessengerSTAT1 protein, humanSTAT1 Transcription Factor

Identifiers

PMID17179173
PMCPMC1954643
OpenAlexW1965584489

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.