Abstract
Glycoxidation and lipid peroxidation products accumulate in collagen of various tissues in haemodialysis patients with end-stage renal disease (ESRD). The purpose of this study was to test the hypothesis that increased glycoxidation and lipid peroxidation of aortic elastin is implicated in the cardiovascular complications, particularly atherosclerosis, of chronic haemodialysis patients. Post-mortem aortic samples were obtained from 16 deceased subjects, including chronic haemodialysis patients (group 1 n=6, age 64.7+/-11.4 years) and control subjects (group 2 n=10, age 61.1+/-10.4 years). The samples were divided into three vessel wall sites: atherosclerotic intima, lesion-free intima, and media. They were sequentially treated with 0.01 M phosphate-buffered saline, collagenase, and elastase to obtain three fractions, namely soluble (SF), collagen (CF), and elastin (EF) fractions, respectively. Using spectrophotofluorometry, the pentosidine- and malondialdehyde (MDA)-linked fluorescence of these fractions was measured at wavelengths 335/385 and 390/460 (excitation/emission), respectively. Samples from haemodialysis patients (group 1) exhibited a significant increase in both pentosidine- and MDA-linked fluorescence of EF in ather...Continue Reading
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