Oxidative Stress and Insulin Resistance
The Coronary Artery Risk Development in Young Adults study
- Kyong Park, PHD1,
- Myron Gross, PHD2,
- Duk-Hee Lee, MD3,
- Paul Holvoet, PHD4,
- John H. Himes, PHD1,
- James M. Shikany, DRPH5 and
- David R. Jacobs, Jr., PHD1,6
- 1Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, Minnesota;
- 2Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, Minnesota;
- 3Department of Preventive Medicine, School of Medicine, College of Medicine, Kyungpook National University, Daegu, Korea;
- 4Atherosclerosis and Metabolism Unit, Katholieke Universiteit Leuven, Leuven, Belgium;
- 5Division of Preventive Medicine, University of Alabama at Birmingham, Birmingham, Alabama;
- 6Department of Nutrition, University of Oslo, Oslo, Norway.
- Corresponding author: David R. Jacobs, jacobs{at}epi.umn.edu.
Abstract
OBJECTIVE Although cumulative evidence suggests that increased oxidative stress may lead to insulin resistance in vivo or in vitro, community-based studies are scarce. This study examined the longitudinal relationships of oxidative stress biomarkers with the development of insulin resistance and whether these relationships were independent of obesity in nondiabetic young adults.
RESEARCH DESIGN AND METHODS Biomarkers of oxidative stress (F2-isoprostanes [F2Isop] and oxidized LDL [oxLDL]), insulin resistance (the homeostasis model assessment of insulin resistance [HOMA-IR]), and various fatness measures (BMI, waist circumference, and estimated percent fat) were obtained in a population-based observational study (Coronary Artery Risk Development in Young Adults) and its ancillary study (Young Adult Longitudinal Trends in Antioxidants) during 2000–2006.
RESULTS There were substantial increases in estimated mean HOMA-IR over time. OxLDL and F2Isop showed little association with each other. Mean evolving HOMA-IR increased with increasing levels of oxidative stress markers (P < 0.001 for oxLDL and P = 0.06 for F2Isop), measured in 2000–2001. After additional adjustment for adiposity, a positive association between oxLDL and HOMA-IR was strongly evident, whereas the association between F2Isop and HOMA-IR was not.
CONCLUSIONS We observed positive associations between each of two oxidative stress markers and insulin resistance. The association with oxidized LDL was independent of obesity, but that with F2Isop was not.
Footnotes
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- Received February 10, 2009.
- Accepted April 10, 2009.
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Readers may use this article as long as the work is properly cited, the use is educational and not for profit, and the work is not altered. See http://creativecommons.org/licenses/by-nc-nd/3.0/ for details.
- © 2009 by the American Diabetes Association.
