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Adipocytokines and the metabolic syndrome among older persons with and without obesity: the InCHIANTI study

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Summary Objectives 

Adipose tissue-derived inflammation may contribute to metabolic alterations and eventually to the metabolic syndrome (MetS). The purpose of this study was to: (1) examine the role of adipocytokines in the association between obesity and the MetS and (2) to determine whether the association is different in obese and non-obese persons. Design 

Cross-sectional population-based InCHIANTI study. Subjects 

A total of 944 community-dwelling adults aged 65 years and older living in Tuscany, Italy. Measurements 

Obesity was defined as body mass index ≥30 kg/m2 and MetS as ≥3 of the ATP-III criteria. Circulating levels of C-reactive protein, interleukin (IL)-6, IL-1 receptor antagonist (IL-1ra), IL-18, tumour necrosis factor (TNF)-α R1, adiponectin, resistin and leptin were measured. Additionally, insulin resistance was determined using the homeostasis model assessment (HOMA-IR). Results 

The prevalence of the MetS was 32%. Both overall and abdominal obesity were significantly associated with the MetS after adjusting for inflammatory cytokines, adipokines and lifestyle factors. After adjusting for multiple confounders and HOMA-IR, IL-1ra, TNF-α R1 and adiponectin (P < 0·05) remained significantly associated with the MetS. Having multiple cytokines in the highest tertile increased the likelihood of having the MetS in both obese (P for trend 0·002) and non-obese persons (P for trend 0·001) independent of insulin resistance. Conclusions 

Non-obese and obese individuals who develop an intense pro-inflammatory state may be more prone to develop the MetS than those with lower levels of inflammation.
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Document Type: Research Article

Affiliations: 1: Laboratory of Epidemiology, Demography, and Biometry, National Institute on Aging, Bethesda 2: Department of Epidemiology and Preventive Medicine, University of Maryland School of Medicine, Baltimore, MD, USA 3: Faculty of Earth and Life Sciences, EMGO Institute, VU University Medical Center, Institute of Health Sciences, VU University Amsterdam, Amsterdam, The Netherlands 4: Department of Internal Medicine and Biomedical Sciences, Section of Geriatrics, University of Parma, Parma, Italy 5: Laboratory of Clinical Investigation, National Institute on Aging, Baltimore, MD, USA 6: Geriatric Unit, Azienda Sanitaria di Firenze, Florence, Italy 7: Clinical Research Branch, National Institute on Aging, Baltimore, MD, USA

Publication date: July 1, 2010

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