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Background. Type-2 diabetes and diabetic kidney disease have additive effects on cardiovascular risk. Furthermore, the degree of proteinuria is an independent predictor of mortality in this patient group. We hypothesized that altered kidney clearance and/or metabolism of vasoactive peptides occurring during proteinuria could link early diabetic nephropathy to cardio vascular disease (CVD).

Methods. We performed a cross-sectional study of 85 incident patients (51 ± 5 years, 49 males) with type-2 diabetes and 38 age- and sex-matched controls. We further divided patients by the presence of minor (<500 mg/day; n = 40) or severe (≥500 mg/day; n = 45) proteinuria. Clinical and anthropometric data, along with ultrasonographic flow-mediated dilatation (FMD) of the brachial artery and carotid intima-media thicknesses (CIMT), were recorded in each group. Circulating NAMPT/visfatin, adiponectin …