Resistin, a new adipokine, is related to inflammation and renal function in kidney allograft recipients

Background. Among patients without chronic kidney disease, resistin, an adipocytokine, has been related to inflammatory markers, coronary artery disease, and cardiovascular disease in the metabolic syndrome. Moreover, resistin up-regulates adhesion molecules. Since inflammation and endothelial cell damage or injury are invariably associated with thrombosis, atherosclerosis, and their major clinical consequences, resistin may play a role to link inflammation and CVD. The aim of this study was to correlate resistin with markers of inflammation and endothelial cell injury in 96 kidney allograft recipients. Methods. We measured resistin and the following markers of endothelial function/injury: vWF, thrombomodulin, VCAM, hsCRP, tumor necrosis factor a (TNF alpha), and interleukin-6 (IL-6). Results. Triglycerides, CRP (assessed by high-sensitivity method), phosphate, creatinine, IL-6, TNFa, vWF, prothrombin fragments 1 + 2, and resistin were elevated among kidney transplant recipients compared with the control group. Kidney allograft recipients with coronary artery disease displayed significantly higher resistin levels than those in patients without this complication. Upon univariate analysis resistin levels in kidney allograft recipients were related to hsCRP, IL-6, thrombomodulin, red blood cell count, white blood cell count, platelet count, creatinine, urea, VCAM, CSA, dose and eGFR. Upon multiple regression analysis, resistin was independently related only to creatinine, hsCRP, and white blood cell count in kidney allograft recipients. Conclusions. The relation of elevated resistin levels to markers of inflammation may represent a novel link between these conditions and adipocytokines. Renal function was a major determinant of elevated resistin in kidney allograft recipients.