Evidence map›Paper›PMID 25535287›Full record

ArticleJournal of lipid research2015

Secretion of fatty acid binding protein aP2 from adipocytes through a nonclassical pathway in response to adipocyte lipase activity.

Meric Erikci Ertunc, Jørgen Sikkeland, Federico Fenaroli, Gareth Griffiths, Mathew P Daniels, Haiming Cao, Fahri Saatcioglu, Gökhan S Hotamisligil

Open access · hybridAbstract read
In one paragraph

Article in Journal of lipid research, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 85 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
85citing papers in PubMed, 1 pooled it
7.9field-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

85 citing papers in PubMed, 1 synthesis or guideline pooled it, 143 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Trial
  4. Trial
  5. Review
  6. Endothelial Cell Regulation of Lipid Uptake During Feeding and Fasting.Arteriosclerosis, thrombosis, and vascular biology · 2026
    Review
  7. Review
  8. Review
  9. Review
  10. Article
  11. Article
  12. Synergistic Effect ofBiology · 2024
    Article
  13. Article
  14. Probiotic, Postbiotic, and Paraprobiotic Effects ofFoods (Basel, Switzerland) · 2024
    Review
  15. How does exosome cause diabetes?Hormones (Athens, Greece) · 2024
    Review
  16. Review
  17. Article
  18. Review
  19. Article
  20. Article

25 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

8 authors at 5 institutions in 2 countries.

Meric Erikci ErtuncDepartment of Genetics and Complex Diseases Harvard School of Public Health, Boston, MA Sabri Ülker Center, Harvard School of Public Health, Boston, MA.
Jørgen SikkelandDepartment of Biosciences, National Institutes of Health, Bethesda, MD.
Federico FenaroliDepartment of Biosciences, National Institutes of Health, Bethesda, MD.
Gareth GriffithsDepartment of Biosciences, National Institutes of Health, Bethesda, MD.
Mathew P DanielsUniversity of Oslo, Oslo, Norway; and National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD.
Haiming CaoUniversity of Oslo, Oslo, Norway; and National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD.
Fahri SaatciogluDepartment of Biosciences, National Institutes of Health, Bethesda, MD.
Gökhan S HotamisligilDepartment of Genetics and Complex Diseases Harvard School of Public Health, Boston, MA Sabri Ülker Center, Harvard School of Public Health, Boston, MA.
National Institutes of Health · USDana-Farber/Harvard Cancer Center · USHarvard University · USNational Heart Lung and Blood Institute · USUniversity of Oslo · NO

Funding

Electron Microscopy CoreZICHL005906 · NHLBI · NATIONAL HEART, LUNG, AND BLOOD INSTITUTE · PI SYED, ZULFEQHAR · 2009 to 2025
$12.9M
Lipids, Inflammation and Insulin ActionR01DK064360 · NIDDK · HARVARD UNIVERSITY (SCH OF PUBLIC HLTH) · PI HOTAMISLIGIL, GOKHAN S · 2004 to 2013
$3.7M
Interdisciplinary Training in Genetics & Complex DiseaseR90DK071507 · NIDDK · HARVARD UNIVERSITY (SCH OF PUBLIC HLTH) · PI WESSLING-RESNICK, MARIANNE · 2004 to 2008
$1.1M
Lipids, Inflammation and Insulin ActionR56DK064360 · NIDDK · HARVARD SCHOOL OF PUBLIC HEALTH · PI HOTAMISLIGIL, GOKHAN S · 2008 to 2008
$163k
NIDDK NIH HHS DK064360NIDDK NIH HHS R01 DK064360NIDDK NIH HHS R56 DK064360NIDDK NIH HHS R90 DK071507
6 · The paper itself

Abstract

Adipocyte fatty acid binding protein 4, aP2, contributes to the pathogenesis of several common diseases including type 2 diabetes, atherosclerosis, fatty liver disease, asthma, and cancer. Although the biological functions of aP2 have classically been attributed to its intracellular action, recent studies demonstrated that aP2 acts as an adipokine to regulate systemic metabolism. However, the mechanism and regulation of aP2 secretion remain unknown. Here, we demonstrate a specific role for lipase activity in aP2 secretion from adipocytes in vitro and ex vivo. Our results show that chemical inhibition of lipase activity, genetic deficiency of adipose triglyceride lipase and, to a lesser extent, hormone-sensitive lipase blocked aP2 secretion from adipocytes. Increased lipolysis and lipid availability also contributed to aP2 release as determined in perilipin1-deficient adipose tissue explants ex vivo and upon treatment with lipids in vivo and in vitro. In addition, we identify a nonclassical route for aP2 secretion in exosome-like vesicles and show that aP2 is recruited to this pathway upon stimulation of lipolysis. Given the effect of circulating aP2 on glucose metabolism, these data support that targeting aP2 or the lipolysis-dependent secretory pathway may present novel mechanistic and translational opportunities in metabolic disease.

Indexed as

3T3-L1 CellsAcyltransferasesAdipocytesAdipose TissueAnimalsCarrier ProteinsFatty Acid-Binding ProteinsFluorescent Antibody TechniqueLipaseMaleMiceMice, KnockoutMicroscopy, ConfocalPerilipin-1PhosphoproteinsAcyltransferasesCarrier ProteinsFabp4 protein, mouseFatty Acid-Binding ProteinsLipasePerilipin-1PhosphoproteinsPNPLA2 protein, mouseadipokineadipose triglyceride lipasehormonehormone-sensitive lipaselipolysisobesity

Identifiers

PMID25535287
PMCPMC4306695
OpenAlexW2099344088

What Socratic 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 Socratic graph.