Evidence map›Paper›PMID 17549449›Full record

ArticleDiabetologia2007

Enhanced proportion of small adipose cells in insulin-resistant vs insulin-sensitive obese individuals implicates impaired adipogenesis.

T McLaughlin, A Sherman, P Tsao, O Gonzalez, G Yee, C Lamendola, G M Reaven, S W Cushman

Registry-linked trialOpen access · bronzeAbstract read
PubMed Publisher
In one paragraph

Article in Diabetologia, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03038620 (Impact of Liraglutide 3.0 on Body Fat Distribution, Visceral Adiposity, and Cardiometabolic Risk Markers In Overweight and Obese Adults at High Risk for Cardiovascular Disease), which is not on this map. Cited by 216 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
216citing papers in PubMed, 1 pooled it
9.4field-weighted citation impact, top 1% 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.

NCT03038620 phase4completedstarted 2017, after this paper: background citation

Impact of Liraglutide 3.0 on Body Fat Distribution, Visceral Adiposity, and Cardiometabolic Risk Markers In Overweight and Obese Adults at High Risk for Cardiovascular Disease

Ran2017Enrolled235Registered outcomes37Posted comparisons0ConditionsCardiovascular Diseases, Fat Disorder, Obesity, VisceralArmsliraglutide, Placebo
Open the trial in the graph
3 · Its place in the literature

Who cites it

216 citing papers in PubMed, 1 synthesis or guideline pooled it, 357 citations in OpenAlex.

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  19. Influence of Weight Loss and Weight Regain on Adipose Tissue Inflammation.Arteriosclerosis, thrombosis, and vascular biology · 2025
    Review
  20. Article

156 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 3 institutions in 1 country.

T McLaughlinDivision of Endocrinology, Department of Medicine, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, CA 94305, USA. tmclaugh@stanford.edu
A Sherman
P Tsao
O Gonzalez
G Yee
C Lamendola
G M Reaven
S W Cushman
Stanford University · USNational Institute of Diabetes and Digestive and Kidney Diseases · USNational Institutes of Health · US

Funding

XOLAIR IN SUBJECTS WITH MODERATE TO SEVERE ATOPIC DERMATITIS WITH FOOD ALLERGYM01RR000070 · NCRR · STANFORD UNIVERSITY · PI ADVANI, RAJ · 1985 to 2008
$32.4M
Integrating the Metabolic and Genetic Faces of ObesityR01DK071309 · NIDDK · STANFORD UNIVERSITY · PI REAVEN, GERALD M. · 2005 to 2008
$1.3M
Heterogeneity of Fat Depots: Biological Differences Related to Insulin ResistanceR01DK080436 · NIDDK · STANFORD UNIVERSITY · PI MCLAUGHLIN, TRACEY · 2009 to 2011
$1.1M
Adipogenesis and Insulin ResistanceZ01DK075014 · NIDDK · NATIONAL INSTITUTE OF DIABETES AND DIGESTIVE AND KIDNEY DISEASES · PI CUSHMAN, SAMUEL · 2007 to 2008
$695k
Mentored Patient-Oriented Research Career Development AwK23RR016071 · NCRR · STANFORD UNIVERSITY · PI MCLAUGHLIN, TRACEY · 2000 to 2004
$627k
Adipogenesis and Insulin ResistanceZ01DK013029 · NIDDK · NATIONAL INSTITUTE OF DIABETES AND DIGESTIVE AND KIDNEY DISEASES · PI SHERMAN, ARTHUR · 2007 to 2008
$208k
Intramural NIH HHSNCRR NIH HHS 5K23 RR 16071NCRR NIH HHS RR 000070NIDDK NIH HHS 1R01 DK 071309-01NIDDK NIH HHS R01 DK071309NIDDK NIH HHS R01 DK080436
6 · The paper itself

Abstract

aims/hypothesisThe biological mechanism by which obesity predisposes to insulin resistance is unclear. One hypothesis is that larger adipose cells disturb metabolism via increased lipolysis. While studies have demonstrated that cell size increases in proportion to BMI, it has not been clearly shown that adipose cell size, independent of BMI, is associated with insulin resistance. The aim of this study was to test this widely held assumption by comparing adipose cell size distribution in 28 equally obese, otherwise healthy individuals who represented extreme ends of the spectrum of insulin sensitivity, as defined by the modified insulin suppression test. SUBJECTS AND

methodsSubcutaneous periumbilical adipose tissue biopsy samples were fixed in osmium tetroxide and passed through the Beckman Coulter Multisizer to obtain cell size distributions. Insulin sensitivity was quantified by the modified insulin suppression test. Quantitative real-time PCR for adipose cell differentiation genes was performed for 11 subjects.

resultsAll individuals exhibited a bimodal cell size distribution. Contrary to expectations, the mean diameter of the larger cells was not significantly different between the insulin-sensitive and insulin-resistant individuals. Moreover, insulin resistance was associated with a higher ratio of small to large cells (1.66 +/- 1.03 vs 0.94 +/- 0.50, p = 0.01). Similar cell size distributions were observed for isolated adipose cells. The real-time PCR results showed two- to threefold lower expression of genes encoding markers of adipose cell differentiation (peroxisome proliferator-activated receptor gamma1 [PPARgamma1], PPARgamma2, GLUT4, adiponectin, sterol receptor element binding protein 1c) in insulin-resistant compared with insulin-sensitive individuals. CONCLUSIONS/

interpretationThese results suggest that after controlling for obesity, insulin resistance is associated with an expanded population of small adipose cells and decreased expression of differentiation markers, suggesting that impairment in adipose cell differentiation may contribute to obesity-associated insulin resistance.

Indexed as

AdipocytesAdipogenesisAdultCell SizeFemaleHumansInsulin ResistanceMaleMicroscopy, Electron, ScanningMiddle AgedObesity

Identifiers

PMID17549449
OpenAlexW2017676683

What OpenQuestion holds

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Read underepoch 390

Registered trials

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.