Horm Metab Res 2006; 38(12): 817-820
DOI: 10.1055/s-2006-956501
Original Clinical

© Georg Thieme Verlag KG Stuttgart · New York

Correlation between Pentosidine and Endothelin-1 in Subjects Undergoing Chronic Hemodialysis

P. Odetti 1 , F. Monacelli 1 , D. Storace 1 , C. Robaudo 1 , S. Rossi 1 , G. Deferrari 1 , T. Barreca 1
  • 1Department of Internal Medicine and Medical Specialties, University of Genova, Genova, Italy
Further Information

Publication History

Received 8 February 2006

Accepted after revision 27 July 2006

Publication Date:
12 December 2006 (online)

Abstract

Advanced glycation end-products (AGEs), which accumulate in the blood and tissues of patients with chronic renal failure (CRF) undergoing chronic hemodialysis, play an important role in the pathogenesis of uremic complications. Endothelin 1 (ET1), a 21-amino acid peptide with vasoconstricting and mitogenic properties, is an important factor in the endothelial dysfunction occurring in uremia. The circulating levels of both AGEs and ET1 have been reported to be increased in chronic renal failure. In the present study we evaluated the possible relationship between pentosidine and ET1 plasma levels in CRF patients undergoing chronic hemodialysis treatment. The plasma concentrations of “free” and bound pentosidine (HPLC methods) and endothelin-1 (RIA method) were measured before the hemodialysis session in 40 nondiabetic CRF patients (22 males and 18 females; 54±3 years) on chronic hemodialysis for at least 1 year. Forty age- and sex-matched normal subjects served as a control group. In hemodialyzed patients, the overall pentosidine residues and pentosidine-free adduct plus pentosidine-free adduct bound reversibly to protein levels (24.9±2.04 pmol/mg protein and 110.5±5.9 pmol/ml, respectively) were significantly higher than those recorded in normal subjects (2.0±0.2 pmol/mg protein and 0.7±0.2 pmol/ml, respectively ). Endothelin-1 was also significantly (p<0.01) increased in CRF patients (10.6±0.4 pmol/ml in CRF patients and 2.7±0.3 pmol/ml in normal subjects). A significant positive correlation (p<0.01) was seen between “total” pentosidine (pentosidine residues and pentosidine-free adduct plus pentosidine-free adduct bound reversibly to protein) levels and endothelin-1 plasma values. The correlation between pentosidine and endothelin-1 provides further evidence that some AGEs exert a detrimental effect on the vascular endothelium, thereby contributing to the hypertension and other cardiovascular damage seen in CRF patients.

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Correspondence

Patrizio OdettiMD 

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