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Experimental Diabetes Research
Volume 2012 (2012), Article ID 859186, 6 pages
http://dx.doi.org/10.1155/2012/859186
Research Article

Sex Differences in the Association between Level of Childhood Interleukin-6 and Insulin Resistance in Adolescence

1Centre for Research in Childhood Health, Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
2Department of Exercise and Sport Science, University of North Carolina, Fetzer Gym, South Road, Chapel Hill, NC 27599-8700, USA
3Department of Infectious Diseases and Rheumatology, Institute for Inflammation Research, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen Ø, Denmark
4Pediatric Clinic II, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen Ø, Denmark
5Department of Sports Medicine, Norwegian School of Sport Sciences, Sognsveien 220, 0806 Oslo, Norway

Received 12 September 2011; Revised 8 November 2011; Accepted 18 November 2011

Academic Editor: Raffaele Marfella

Copyright © 2012 Anna Bugge et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The purpose of this study was to determine whether levels of interleukin-6 (IL-6) in childhood are related to insulin resistance in adolescence. Further, to explore how fatness and cardiorespiratory fitness (VO2peak) moderate this relationship. Methods. 292 nine-year-old children (n=292) were followed for 4 years. Anthropometrics and VO2peak were measured. Fasting blood samples were analyzed for IL-6, insulin, and glucose. Homeostasis model assessment (HOMA-IR) was used as a measure of insulin resistance. Results. For girls but not boys, levels of IL-6 at age 9 yrs correlated with HOMA-IR at age 13 yrs: r=0.223, P=0.008. Girls with IL-6 levels within the highest quartile at age 9 yrs had an odds ratio of 3.68 (CI = 1.58–8.57) being in the highest quartile of HOMA-IR four years later. Conclusion. In this cohort, IL-6 levels in childhood were related to insulin resistance in adolescence, but only for girls.