Evidence map›Paper›PMID 21697093›Full record

ArticleThe Journal of biological chemistry2011

Nicotinamide phosphoribosyltransferase is essential for interleukin-1beta-mediated dedifferentiation of articular chondrocytes via SIRT1 and extracellular signal-regulated kinase (ERK) complex signaling.

Eun-Hee Hong, Hong Shik Yun, Jongdoo Kim, Hong-Duck Um, Kee-Ho Lee, Chang-Mo Kang, Su-Jae Lee, Jang-Soo Chun, Sang-Gu Hwang

Open access · hybridAbstract read
In one paragraph

Article in The Journal of biological chemistry, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed, 1 pooled it
2.5field-weighted citation impact, top 11% 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

31 citing papers in PubMed, 1 synthesis or guideline pooled it, 60 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

9 authors at 3 institutions in 1 country.

Eun-Hee HongDivision of Radiation Cancer Research, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, Korea.
Hong Shik Yun
Jongdoo Kim
Hong-Duck Um
Kee-Ho Lee
Chang-Mo Kang
Su-Jae Lee
Jang-Soo Chun
Sang-Gu Hwang
Korea Institute of Radiological and Medical Sciences · KRHanyang University · KRGwangju Institute of Science and Technology · KR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Although much is known about interleukin (IL)-1β and its role as a key mediator of cartilage destruction in osteoarthritis, only limited information is available on IL-1β signaling in chondrocyte dedifferentiation. Here, we have characterized the molecular mechanisms leading to the dedifferentiation of primary cultured articular chondrocytes by IL-1β treatment. IL-1β or lipopolysaccharide, but not phorbol 12-myristate 13-acetate, retinoic acid, or epidermal growth factor, induced nicotinamide phosphoribosyltransferase (NAMPT) expression, showing the association of inflammatory cytokines with NAMPT regulation. SIRT1, in turn, was activated NAMPT-dependently, without any alteration in the expression level. Activation or inhibition of SIRT1 oppositevely regulates IL-1β-mediated chondrocyte dedifferentiation, suggesting this protein as a key regulator of chondrocytes phenotype. SIRT1 activation promotes induction of ERK and p38 kinase activities, but not JNK, in response to IL-1β. Subsequently, ERK and p38 kinase activated by SIRT1 also induce SIRT1 activation, forming a positive feedback loop to sustain downstream signaling of these kinases. Moreover, we found that the SIRT1-ERK complex, but not SIRT1-p38, is engaged in IL-1β-induced chondrocyte dedifferentiation via a Sox-9-mediated mechanism. JNK is activated by IL-1β and modulates dedifferentiation of chondrocytes, but this pathway is independent on NAMPT-SIRT1 signaling. Based on these findings, we propose that IL-1β induces dedifferentiation of articular chondrocytes by up-regulation of SIRT1 activity enhanced by both NAMPT and ERK signaling.

Indexed as

AnimalsCarcinogensCartilage, ArticularCell DedifferentiationCells, CulturedChondrocytesCytokinesHumansInterleukin-1betaMAP Kinase Kinase 4MAP Kinase Signaling SystemMultienzyme ComplexesNicotinamide Phosphoribosyltransferasep38 Mitogen-Activated Protein KinasesRabbitsSirtuin 1CarcinogensCytokinesIL1B protein, humanInterleukin-1betaMAP Kinase Kinase 4Multienzyme ComplexesNicotinamide Phosphoribosyltransferasenicotinamide phosphoribosyltransferase, humanp38 Mitogen-Activated Protein KinasesSIRT1 protein, humanSirtuin 1Tetradecanoylphorbol Acetate

Identifiers

PMID21697093
PMCPMC3151103
OpenAlexW1587550491

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.