MS and TJE share equal responsibility as senior authors.
Impact of inflammation on epigenetic DNA methylation – a novel risk factor for cardiovascular disease?
Article first published online: 25 JAN 2007
Journal of Internal Medicine
Volume 261, Issue 5, pages 488–499, May 2007
How to Cite
Stenvinkel, P., Karimi, M., Johansson, S., Axelsson, J., Suliman, M., Lindholm, B., Heimbürger, O., Barany, P., Alvestrand, A., Nordfors, L., Qureshi, A. R., Ekström, T. J. and Schalling, M. (2007), Impact of inflammation on epigenetic DNA methylation – a novel risk factor for cardiovascular disease?. Journal of Internal Medicine, 261: 488–499. doi: 10.1111/j.1365-2796.2007.01777.x
- Issue published online: 30 JAN 2007
- Article first published online: 25 JAN 2007
- chronic kidney disease;
- DNA methylation;
Objective. The lifespan of dialysis patients is as short as in patients with metastatic cancer disease, mainly due to cardiovascular disease (CVD). DNA methylation is an important cellular mechanism modulating gene expression associated with ageing, inflammation and atherosclerotic processes.
Design. DNA methylation was analysed in peripheral blood leucocytes from three different groups of chronic kidney disease (CKD) populations (37 CKD stages 3 and 4 patients, 98 CKD stage 5 patients and 20 prevalent haemodialysis patients). Thirty-six healthy subjects served as controls. Clinical characteristics (diabetes mellitus, nutritional status and presence of clinical CVD), inflammation and oxidative stress biomarkers, homocysteine and global DNA methylation in peripheral blood leucocytes (defined as HpaII/MspI ratio by the Luminometric Methylation Assay method) were evaluated. CKD stage 5 patients (n = 98) starting dialysis treatment were followed for a period of 36 ± 2 months.
Results. Inflamed patients had lower ratios of HpaII/MspI, indicating global DNA hypermethylation. Analysis by the Cox regression model demonstrated that DNA hypermethylation (HpaII/MspI ratio <median) was significantly associated with both all-cause (RR 5.0; 95% CI: 1.7–14.8; P < 0.01) and cardiovascular (RR 13.9; 95% CI: 1.8–109.3; P < 0.05) mortality, even following the adjustment for age, CVD, diabetes mellitus and inflammation.
Conclusion. The present study demonstrates that global DNA hypermethylation is associated with inflammation and increased mortality in CKD.