Evidence map›Paper›PMID 18320034›Full record

ArticlePloS one2008

Monomeric tartrate resistant acid phosphatase induces insulin sensitive obesity.

Pernilla Lång, Vanessa van Harmelen, Mikael Rydén, Maria Kaaman, Paolo Parini, Claes Carneheim, A Ian Cassady, David A Hume, Göran Andersson, Peter Arner

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
2.6field-weighted citation impact, top 10% 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

10 citing papers in PubMed, 46 citations in OpenAlex.

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  9. Trophic macrophages in development and disease.Nature reviews. Immunology · 2009
    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 4 institutions in 3 countries.

Pernilla LångDivision of Pathology, Department of Laboratory Medicine, Karolinska Institutet, Karolinska University Hospital, Huddinge, Sweden.
Vanessa van Harmelen
Mikael Rydén
Maria Kaaman
Paolo Parini
Claes Carneheim
A Ian Cassady
David A Hume
Göran Andersson
Peter Arner
Karolinska Institutet · SEKarolinska University Hospital · SEUniversity of Queensland · AUSwedish Orphan Biovitrum (Sweden) · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundObesity is associated with macrophage infiltration of adipose tissue, which may link adipose inflammation to insulin resistance. However, the impact of inflammatory cells in the pathophysiology of obesity remains unclear. Tartrate resistant acid phosphatase (TRAP) is an enzyme expressed by subsets of macrophages and osteoclasts that exists either as an enzymatically inactive monomer or as an active, proteolytically processed dimer. PRINCIPAL

findingsUsing mice over expressing TRAP, we show that over-expression of monomeric, but not the dimeric form in adipose tissue leads to early onset spontaneous hyperplastic obesity i.e. many small fat cells. In vitro, recombinant monomeric, but not proteolytically processed TRAP induced proliferation and differentiation of mouse and human adipocyte precursor cells. In humans, monomeric TRAP was highly expressed in the adipose tissue of obese individuals. In both the mouse model and in the obese humans the source of TRAP in adipose tissue was macrophages. In addition, the obese TRAP over expressing mice exhibited signs of a low-grade inflammatory reaction in adipose tissue without evidence of abnormal adipocyte lipolysis, lipogenesis or insulin sensitivity.

conclusionMonomeric TRAP, most likely secreted from adipose tissue macrophages, induces hyperplastic obesity with normal adipocyte lipid metabolism and insulin sensitivity.

Indexed as

Acid PhosphataseAdipose TissueAdultAnimalsBiomarkersBlotting, WesternBody WeightDimerizationDNA PrimersFemaleHumansImmunoenzyme TechniquesInsulin ResistanceIsoenzymesLipogenesisLipolysisAcid PhosphataseAcp5 protein, mouseBiomarkersDNA PrimersIsoenzymesRecombinant ProteinsRNA, MessengerTartrate-Resistant Acid Phosphatase

Identifiers

PMID18320034
PMCPMC2248616
OpenAlexW2067890058

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Registered trials

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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.