Ectopic adiposity and cardiometabolic health in COPD
Received 22 March 2018
Accepted for publication 28 June 2018
Published 15 October 2018 Volume 2018:13 Pages 3331—3340
Checked for plagiarism Yes
Review by Single-blind
Peer reviewer comments 2
Editor who approved publication: Dr Richard Russell
Valérie Coats,1 Jean-Pierre Després,1 Natalie Alméras,1 Mickaël Martin,1 Don D Sin,2 Rémi Rabasa-Lhoret,3 Éric Larose,1 Wan C Tan,2 Jean Bourbeau,4 François Maltais1
On behalf of the CanCOLD Collaborative Research Group and the Canadian Respiratory Research Network
1Centre de recherche, Institut universitaire de cardiologie et de pneumologie de Québec, Université, Laval, QC, Canada; 2University of British Columbia, Vancouver, BC, Canada; 3Institut de Recherches Cliniques de Montréal, Département de Nutrition et Service d’Endocrinologie, Centre Hospitalier de l’Université de Montréal, Montréal, QC, Canada; 4Respiratory Epidemiology and Clinical Research Unit, Research Institute of the McGill University Health Centre, Montreal, QC, Canada
Rationale: Obesity/overweight is the most prevalent body composition abnormality in COPD. However, little is known about the impact of fat distribution on cardiometabolic health in COPD.
Objective: To study the associations between ectopic adiposity, cardiometabolic health, and COPD.
Methods: A total of 263 subjects (166 males; age=65±9 years) were randomly selected from the general population. Subjects were classified as non-COPD controls and COPD, according to the Global initiative for chronic Obstructive Lung Disease (GOLD) classification, and the presence of cardiometabolic comorbidities was recorded. Ectopic fat accumulation was documented from computed tomography measurements of visceral adipose tissue cross-sectional areas and muscle mean attenuation, assessed at L4–L5. Blood glucose, lipid, and adipokine profiles were also evaluated.
Results: After correcting for age, sex, and tobacco exposure, visceral adipose tissue cross-sectional area was higher in GOLD 2+ compared to GOLD 1 individuals. Consistent with this, mean muscle tissue attenuation was lower in GOLD 2+ vs GOLD 1 and non-COPD controls (P<0.001). In multiple regression models, visceral adipose tissue cross-sectional area was strongly associated with hypertension (P<0.001) and diabetes (P<0.001), while muscle attenuation was associated with coronary artery disease (P<0.001). Blood glucose, lipid, and adipokine profiles were similar across groups with the exception of leptin level which was higher in GOLD 2+ subjects compared to GOLD 1 and controls.
Conclusion: GOLD 2+ COPD was associated with ectopic fat accumulation which modulated cardiometabolic health.
Keywords: chronic obstructive pulmonary disease, obesity, abdominal, comorbidity, ectopic adiposity, cardiometabolic health
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