Evidence map›Paper›PMID 12606719›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2003

Lipolysis of triglyceride-rich lipoproteins generates PPAR ligands: evidence for an antiinflammatory role for lipoprotein lipase.

Ouliana Ziouzenkova, Stephane Perrey, Liana Asatryan, Juliana Hwang, Karen L MacNaul, David E Moller, Daniel J Rader, Alex Sevanian, Rudolf Zechner, Gerald Hoefler and 1 more

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 81 papers.

0numbers the graph read from it
0cells of the map it votes in
81citing papers in PubMed
8.0field-weighted citation impact, top 2% 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

81 citing papers in PubMed, 250 citations in OpenAlex.

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21 more citing papers are in PubMed but not listed here.

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

11 authors at 4 institutions in 2 countries.

Ouliana ZiouzenkovaCardiovascular Division, Brigham and Women's Hospital, Harvard University, Boston, MA 02115, USA.
Stephane Perrey
Liana Asatryan
Juliana Hwang
Karen L MacNaul
David E Moller
Daniel J Rader
Alex Sevanian
Rudolf Zechner
Gerald Hoefler
Jorge Plutzky
Brigham and Women's Hospital · USUniversity of Southern California · USUniversity of Graz · ATUniversity of Pennsylvania · US

Funding

OXIDATIVE AND ATHEROGENIC ACTION OF IN VIVO MODIFIED LDLR01HL050350 · NHLBI · UNIVERSITY OF SOUTHERN CALIFORNIA · PI HSIAI, TZUNG K · 1995 to 2004
$1.3M
NHLBI NIH HHS HL50350NHLBI NIH HHS R01 HL050350
6 · The paper itself

Abstract

Increased levels of triglyceride-rich lipoproteins provoke lipid accumulation in the artery wall, triggering early inflammatory responses central to atherosclerosis like endothelial adhesion molecule expression. The endogenous mechanisms limiting such reactions remain poorly defined. Lipoprotein lipase (LPL) plays a central role in lipid metabolism by hydrolyzing triglyceride rich lipoproteins and releasing fatty acids. We found that LPL treatment reversed tumor necrosis factor alpha and very low-density lipoprotein (VLDL)-stimulated endothelial vascular cell adhesion molecule 1 (VCAM1) induction and VCAM1 promoter responses, thus recapitulating effects reported with synthetic peroxisome proliferator-activated receptor (PPAR) agonists. In fact, these LPL effects on VCAM1 were absent in endothelial cells isolated from PPAR alpha-deficient mice. This finding suggests a novel antiinflammatory role for LPL. Further studies reveal specificity for PPAR activation through lipolysis in regards to lipoprotein substrate (VLDL >> LDL > HDL), PPAR isoform (PPAR alpha >> PPAR delta > PPAR gamma), and among fatty acid-releasing lipases. These PPAR responses required intact LPL catalytic activity. In vivo, transgenic mice overexpressing LPL had increased peroxisome proliferation, but not in the genetic absence of PPAR alpha. Although human plasma possesses minimal PPAR alpha activation despite containing abundant free fatty acids, marked PPAR alpha activation is seen with human plasma after LPL is added in vitro or systemically released in vivo. These data suggest a previously uncharacterized pathway in which the key lipolytic enzyme LPL can act on circulating lipoproteins to generate PPAR alpha ligands, providing a potentially important link between lipoprotein metabolism and distal PPAR alpha transcriptional effects.

Indexed as

AnimalsAnti-Inflammatory AgentsBlotting, NorthernCells, CulturedDose-Response Relationship, DrugFatty AcidsHumansImmunohistochemistryLigandsLipid MetabolismLipolysisLipoprotein LipaseLipoproteinsLipoproteins, VLDLMiceMice, TransgenicAnti-Inflammatory AgentsFatty AcidsLigandsLipoprotein LipaseLipoproteinsLipoproteins, VLDLProtein IsoformsReceptors, Cytoplasmic and NuclearTranscription FactorsTriglyceridesVascular Cell Adhesion Molecule-1

Identifiers

PMID12606719
PMCPMC151409
OpenAlexW2044136517

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.