Interaction between oxidative stress and high-density lipoprotein cholesterol is associated with severity of coronary artery calcification in rheumatoid arthritis
Article first published online: 27 APR 2010
Copyright © 2010 by the American College of Rheumatology
Arthritis Care & Research
Volume 62, Issue 10, pages 1473–1480, October 2010
How to Cite
Rho, Y. H., Chung, C. P., Oeser, A., Solus, J. F., Gebretsadik, T., Shintani, A., Raggi, P., Milne, G. L. and Stein, C. M. (2010), Interaction between oxidative stress and high-density lipoprotein cholesterol is associated with severity of coronary artery calcification in rheumatoid arthritis. Arthritis Care Res, 62: 1473–1480. doi: 10.1002/acr.20237
- Issue published online: 27 APR 2010
- Article first published online: 27 APR 2010
- Accepted manuscript online: 27 APR 2010 12:00AM EST
- Manuscript Accepted: 21 APR 2010
- Manuscript Received: 11 AUG 2009
- NIH (National Center for Research Resources/NIH). Grant Numbers: HL65082, HL67964, P60-AR056116, GM07569, UL1-RR024975
- Dan May Chair in Medicine
To test the hypothesis that oxidative stress is increased in patients with rheumatoid arthritis (RA) due to increased inflammation and contributes to the pathogenesis of atherosclerosis.
The independent association between urinary F2-isoprostane excretion, a measure of oxidative stress, and RA was tested using multiple linear regression models in 169 patients with RA and 92 control subjects, frequency matched for age, race, and sex. The relationship between F2-isoprostane excretion and coronary calcium, a marker of atherosclerosis, was examined in multivariable proportional odds logistic regression models that also assessed the interactions between oxidative stress and low-density lipoprotein and high-density lipoprotein (HDL) cholesterol.
F2-isoprostane excretion was significantly higher in patients with RA (median 2.75 [interquartile range (IQR) 1.60–4.06] ng/mg creatinine) than in control subjects (median 1.86 [IQR 1.25–2.62] ng/mg creatinine; adjusted P = 0.006). In patients with RA, F2-isoprostanes were positively correlated with body mass index (P < 0.001), but not with disease activity or mediators of inflammation such as the Disease Activity Score in 28 joints or serum tumor necrosis factor α, interleukin-6, and C-reactive protein concentrations in adjusted multivariable models (P > 0.05 for all). In patients with RA, F2-isoprostanes significantly modified the effect of HDL cholesterol on coronary calcification (P = 0.02 for interaction) after adjustment for age, sex, and race. As F2-isoprostane levels increased, HDL lost its protective effect against coronary calcification.
Oxidative stress measured as F2-isoprostane excretion was higher in patients with RA than in control subjects. Among patients with RA, higher F2-isoprostane excretion and HDL cholesterol concentrations interacted significantly and were positively associated with the severity of coronary calcification.