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Articles by T Ueland
Total Records ( 2 ) for T Ueland
  A. G Semb , T Ueland , P Aukrust , N. J Wareham , R Luben , L Gullestad , J. J.P Kastelein , K. T Khaw and S. M. Boekholdt

Objective— The purpose of this study was to examine the association between serum levels of osteoprotegerin (OPG) and receptor activator of nuclear factor-B ligand (RANKL) and future coronary artery disease (CAD) in apparently healthy individuals. The identification of OPG as a novel cardiovascular risk marker suggests an association between mediators of bone homeostasis and cardiovascular disease.

Methods and Results— Serum levels of OPG and RANKL were analyzed in a prospective case–control study nested in the European Prospective Investigation into Cancer and Nutrition (EPIC-Norfolk) study, a cohort study of 25 663 men and women, where 951 apparently healthy individuals who developed a coronary event during 6 years’ follow-up were matched by sex and age with 1705 healthy controls. Baseline OPG, but not RANKL, was higher in cases than in controls, and OPG was higher in women than in men. Both men and women in the highest OPG quartile had a higher risk for future CAD. These associations were independent of established cardiovascular risk factors, and when using OPG as a continuous variable, also after adjustment for CRP. In contrast, RANKL showed no association with coronary events.

Conclusion— OPG is associated with the risk of future CAD in apparently healthy men and women, independent of established cardiovascular risk factors.

  C. P Dahl , C Husberg , L Gullestad , A Waehre , J. K Damas , L. E Vinge , A. V Finsen , T Ueland , G Florholmen , S Aakhus , B Halvorsen , P Aukrust , E Oie , A Yndestad and G. Christensen

Background— Inflammation has been implicated in the pathogenesis of heart failure (HF), but knowledge about the production and role of inflammatory actors remains incomplete. On the basis of its role in vascular inflammation, vascular proliferation, and matrix degradation, we hypothesized a role for the chemokine CXCL16 in the pathogenesis of myocardial remodeling and development of HF.

Methods and Results— Our main findings were (1) patients with chronic HF (n=188) had increased plasma levels of CXCL16, which correlated with disease severity. (2) Left ventricular tissue from patients with end-stage HF (n=8) showed enhanced CXCL16 levels compared with nonfailing left ventricular (n=6) as assessed by Western blotting. (3) In mice with postmyocardial infarction HF, expression of CXCL16, as assessed by real-time RT-PCR, was increased in the infarcted and the noninfarcted areas of left ventricular 3 and 7 days after coronary ligation, indicating early onset of CXCL16 production. Furthermore, mice exposed to aortic banding had enhanced CXCL16 expression in left ventricular, indicating that CXCL16 expression is not related to ischemia alone. (4) In vitro, CXCL16 promoted proliferation and impaired collagen synthesis in myocardial fibroblasts, and in cardiomyocytes and myocardial fibroblasts, CXCL16 increased matrix metalloproteinase activity, primarily reflecting increased matrix metalloproteinase-2 levels. (5) By using specific inhibitors, we showed that the effect of CXCL16 on fibroblasts involved activation of Jun N-terminal kinase.

Conclusion— We show enhanced myocardial CXCL16 expression in experimental and clinical HF. The effect of CXCL16 on cardiomyocytes and fibroblasts suggests a role for CXCL16 in matrix remodeling and ultimately in the development of HF.

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