Evidence map›Paper›PMID 19808909›Full record

ArticleAmerican journal of physiology. Endocrinology and metabolism2009

Pigment epithelium-derived factor suppresses adipogenesis via inhibition of the MAPK/ERK pathway in 3T3-L1 preadipocytes.

Min Wang, Joshua J Wang, Jingming Li, Kyoungmin Park, Xiaoxian Qian, Jian-xing Ma, Sarah X Zhang

Abstract read
In one paragraph

Article in American journal of physiology. Endocrinology and metabolism, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed
2.2field-weighted citation impact, top 12% 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

36 citing papers in PubMed, 78 citations in OpenAlex.

  1. Trial
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  4. Effects of theAnimals : an open access journal from MDPI · 2023
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  19. Food science and biotechnology · 2017
    Article
  20. Pigment epithelium-derived factor restoration increases bone mass and improves bone plasticity in a model of osteogenesis imperfecta type VI via Wnt3a blockade.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2016
    Article
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

7 authors at 3 institutions in 2 countries.

Min WangHarold Hamm Oklahoma Diabetes Center and Section of Endocrinology and Diabetes, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73104, USA.
Joshua J Wang
Jingming Li
Kyoungmin Park
Xiaoxian Qian
Jian-xing Ma
Sarah X Zhang
University of Oklahoma Health Sciences Center · USSun Yat-sen University · CNThird Affiliated Hospital of Sun Yat-sen University · CN

Funding

THE ROLE OF COMPLEX 1 IN MITOCHONDRIAL DYSFUNCTION & FREE RADICAL PROD IN TYPE 1P20RR024215 · NCRR · UNIVERSITY OF OKLAHOMA HLTH SCIENCES CTR · PI SHORT, KEVIN R. · 2007 to 2011
$11.7M
STUDIES OF RPE65R01EY012231 · NEI · WAKE FOREST UNIVERSITY HEALTH SCIENCES · PI MA, JIAN-XING, MOISEYEV, GENNADIY · 1998 to 2021
$5.7M
A New Therapy for Diabetic Macular EdemaR33EY015650 · NEI · UNIVERSITY OF OKLAHOMA HLTH SCIENCES CTR · PI MA, JIAN-XING · 2005 to 2007
$1.5M
A New Therapy for Diabetic Macular EdemaR21EY015650 · NEI · UNIVERSITY OF OKLAHOMA HLTH SCIENCES CTR · PI MA, JIAN-XING · 2003 to 2004
$732k
NCRR NIH HHS P20-RR-024215NEI NIH HHS EY-012231NEI NIH HHS EY-015650
6 · The paper itself

Abstract

We previously reported that circulating levels of pigment epithelium-derived factor (PEDF), a newly identified adipokine, are increased in patients with type 2 diabetes, correlating with body mass index. However, the role of PEDF in adipogenesis remains elusive. In the present study, we have investigated the effects and mechanisms of PEDF on adipocyte differentiation in 3T3-L1 preadipocytes. Differentiation of 3T3-L1 preadipocytes was induced in the presence or absence of human recombinant PEDF protein. The effects of PEDF on adipogenic gene expression, mitotic clonal expansion (MCE), and MAPK activation were investigated. Physiological concentrations of human PEDF protein inhibited adipocyte differentiation, evidenced by decreased lipid accumulation, downregulation of adipocyte markers, and inhibition of master adipogenic transcription factors such as C/EBP-alpha and PPARgamma. The antiadipogenic effects of PEDF were observed only when PEDF was added to the cells on day 0, but not on day 3 during differentiation, suggesting that PEDF targets some early adipogenic events. Similarly, overexpression of PEDF by adenovirus attenuated adipocyte differentiation. Further studies revealed that PEDF, or U-0126, a specific MAPK/ERK inhibitor, sequentially inhibited the early activation of ERK and MCE. Moreover, PEDF attenuated expression and the phosphorylation of C/EBP-beta at Thr(188), an essential step for transcriptional activation of C/EBP-beta. In addition, PEDF expression was decreased significantly in the first 24 h during adipocyte differentiation, suggesting that downregulation of PEDF may be essential for the initiation of MCE and adipogenesis. We conclude that PEDF inhibits adipogenesis in 3T3-L1 preadipocytes partially because of inhibition of the MAPK/ERK signaling pathway and MCE.

Indexed as

3T3-L1 CellsAdipocytesAdipogenesisAdipose TissueAnimalsAzo CompoundsBlotting, WesternButadienesCCAAT-Enhancer-Binding Protein-alphaCell DifferentiationEye ProteinsHumansMAP Kinase Signaling SystemMiceMicroscopy, FluorescenceMitogen-Activated Protein Kinase KinasesAzo CompoundsButadienesCCAAT-Enhancer-Binding Protein-alphaEye ProteinsMitogen-Activated Protein Kinase KinasesNerve Growth FactorsNitrilesoil red OPigment Epithelium-Derived FactorPPAR gammaProtein Kinase InhibitorsRecombinant ProteinsRNASerpinsU 0126

Identifiers

PMID19808909
PMCPMC2793046
OpenAlexW2114499459

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.