RT Journal Article SR Electronic T1 Independent Relationship of Osteoprotegerin Concentrations with Endothelial Activation and Carotid Atherosclerosis in Patients with Severe Rheumatoid Arthritis JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP jrheum.131037 DO 10.3899/jrheum.131037 A1 Patrick H. Dessein A1 Raquel López-Mejias A1 Carlos González-Juanatey A1 Fernanda Genre A1 José A. Miranda-Filloy A1 Javier Llorca A1 Miguel A. González-Gay YR 2014 UL http://www.jrheum.org/content/early/2014/01/29/jrheum.131037.abstract AB Objective Osteoprotegerin (OPG) may contribute to the link between systemic inflammation and increased cardiovascular risk. We investigated the relationship of OPG concentrations with endothelial activation and carotid atherosclerosis in rheumatoid arthritis (RA). Methods OPG concentrations and those of endothelial activation molecules were measured by using ELISA in 34 patients who were treated with infliximab (IFX), both immediately before and after an IFX infusion. Carotid intima-media thickness (CIMT) and plaque were determined by ultrasound in 27 of the study participants. Results Median (interquartile range) OPG concentrations decreased from 4.8 pmol/l (2.8–6.5) to 4.4 pmol/l (2.9–6.1; p = 0.04) upon IFX infusion. Baseline OPG concentrations were inversely associated with those of total and low-density lipoprotein (LDL) cholesterol (partial R = –0.50, p = 0.004, and R = –0.48, p = 0.007, respectively). Prior to IFX administration, OPG concentrations were associated with those of intercellular adhesion molecule (ICAM)-1 (partial R = 0.34, p = 0.05), CIMT (partial R = 0.51 to 0.52, p < 0.009), and plaque (OR = 1.52, 95% CI 1.01–2.29 to OR = 1.61, 95% CI 1.03–2.51; p < 0.04), independent of conventional risk factors and C-reactive protein concentrations or disease activity. Except for the OPG concentrations-plaque association (p = 0.09), these relationships remained significant subsequent to IFX administration (p < 0.05). Reductions in OPG levels related to those in vascular cell adhesion molecule (VCAM)-1 concentrations (partial R = 0.35, p = 0.04) and had borderline significance (p = 0.09) with those in ICAM-1 (partial R = 0.29) concentrations. Conclusion OPG concentrations are independently associated with endothelial activation and carotid atherosclerosis in RA. Reductions in OPG concentrations upon IFX administration are associated with decreased endothelial activation. OPG may be involved in increased cardiovascular disease risk and may improve its stratification in patients with RA.