Evidence map›Paper›PMID 25869607›Full record

ArticleInternational journal of obesity (2005)2015

Low cytochrome oxidase 4I1 links mitochondrial dysfunction to obesity and type 2 diabetes in humans and mice.

B Van der Schueren, R Vangoitsenhoven, B Geeraert, D De Keyzer, M Hulsmans, M Lannoo, H J Huber, C Mathieu, P Holvoet

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In one paragraph

Article in International journal of obesity (2005), 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 1 pooled it
1.5field-weighted citation impact, top 18% 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

17 citing papers in PubMed, 1 synthesis or guideline pooled it, 30 citations in OpenAlex.

  1. Pooled it
  2. Nuclear Control of Mitochondrial Homeostasis and Venetoclax Efficacy in AML via COX4I1.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025
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  7. Nutrients · 2023
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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

9 authors at 1 institution in 1 country.

B Van der SchuerenLaboratory for Clinical and Experimental Medicine and Endocrinology, KU Leuven, Leuven, Belgium.
R VangoitsenhovenLaboratory for Clinical and Experimental Medicine and Endocrinology, KU Leuven, Leuven, Belgium.
B GeeraertDivision of Atherosclerosis and Metabolism, Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium.
D De KeyzerDivision of Atherosclerosis and Metabolism, Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium.
M HulsmansDivision of Atherosclerosis and Metabolism, Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium.
M LannooLaboratory for Clinical and Experimental Medicine and Endocrinology, KU Leuven, Leuven, Belgium.
H J HuberDivision of Atherosclerosis and Metabolism, Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium.
C MathieuLaboratory for Clinical and Experimental Medicine and Endocrinology, KU Leuven, Leuven, Belgium.
P HolvoetDivision of Atherosclerosis and Metabolism, Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium.
KU Leuven · BE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesCytochrome oxidase (COX) dysfunction is associated with mitochondrial oxidative stress. We determined the association between COX expression, obesity and type 2 diabetes. SUBJECTS/

methodsCOX4I1 and COX10 genes were measured in monocytes of 24 lean controls, 31 glucose-tolerant and 67 diabetic obese patients, and 17 morbidly obese patients before and after bariatric surgery. We investigated the effect of caloric restriction and peroxisome proliferator-activated receptor (PPAR) agonist treatment on Cox in obese diabetic mice, and that of diet-induced insulin resistance in Streptozotocin-treated mice.

resultsLow COX4I1 was associated with type 2 diabetes in obese patients, adjusting for age, gender, smoking, interleukin-6 and high-sensitivity C-reactive protein, all related to metabolic syndrome (MetS; odds ratio: 6.1, 95% confidence interval: 2.3-16). In contrast, COX10 was low in glucose-tolerant and diabetic obese patients. In morbidly obese patients, COX4I1 was lower in visceral adipose tissue collected at bariatric surgery. In their monocytes, COX4I1 decreased after bariatric surgery, and low COX4I1 at 4 months was associated with MetS at 7 years. In leptin-deficient obese diabetic mice, Cox4i1 was low in white visceral adipose tissue (n=13; P<0.001) compared with age-matched lean mice (n=10). PPARγ-agonist treatment (n=13), but not caloric restriction (n=11), increased Cox4i1 (P<0.001). Increase in Cox4i1 depended on the increase in glucose transporter 4 (Glut4) expression and insulin sensitivity, independent of the increase in blood adiponectin. In streptozotocin-treated mice (three groups of seven mice, diet-induced insulin resistance decreased Cox4i1 and Glut4 (P<0.001 for both).

conclusionCOX4I1 depression is related to insulin resistance and type 2 diabetes in obesity. In peripheral blood monocytes, it may be a diagnostically useful biomarker.

Indexed as

Alkyl and Aryl TransferasesAnimalsBariatric SurgeryDiabetes Mellitus, ExperimentalDiabetes Mellitus, Type 2Electron TransportElectron Transport Complex IVGenetic VariationHumansInsulin ResistanceMembrane ProteinsMiceMice, ObeseMitochondriaObesity, MorbidWeight LossAlkyl and Aryl TransferasesCOX10 protein, humanCOX10 protein, mouseCox4i1 protein, mouseElectron Transport Complex IVMembrane Proteins

Identifiers

PMID25869607
OpenAlexW2014747446

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.