The Impact of Osteocalcin, Osteoprotegerin and Osteopontin on Arterial Stiffness in Chronic Renal Failure Patients on Hemodialysis

• Published in: Kidney & blood pressure research Vol. 42; no. 6; pp. 1312 - 1321
• Main Authors: Csiky, Botond, Sági, Balázs, Peti, Attila, Lakatos, Orsolya, Prémusz, Viktória, Sulyok, Endre
• Format: Journal Article
• Language: English
• Published: Basel, Switzerland Karger Publishers 01-01-2017
• Subjects: Adult; Aged; Calcinosis; Case-Control Studies; Cross-Sectional Studies; Female; Hemodialysis; Humans; Kidney Failure, Chronic - physiopathology; Kidney Failure, Chronic - therapy; Male; Middle Aged; Original Paper; Osteocalcin; Osteocalcin - blood; Osteopontin; Osteopontin - blood; Osteoprotegerin; Osteoprotegerin - blood; Pulse Wave Analysis; Pulse wave velocity; Renal Dialysis; Vascular Stiffness; Pulse wave velocity; Osteopontin; Osteocalcin; Hemodialysis; Vascular stiffness; Osteoprotegerin
• ISSN: 1420-4096; 1423-0143
• DOI: 10.1159/000486114

Background/Aims: This cross-sectional study was designed to assess the relationship between vascular stiffness (VS) and bone-related proteins involved in the development of arteriosclerosis in patients on regular hemodialysis (HD). Methods: 68 consecutive patients in stable clinical condition who received regular HD in the FMC Dialysis Center, Pécs were included. VS parameters (carotid-femoral pulse wave velocity – PWV, aortic augmentation index - AIx) were determined by applanation tonometry (SphygmoCor, AtCor Medical, Sidney) and the routine latoratory test were completed with measurements of osteocalcin (OC), osteopontin (OP) and osteoprotegerin (OPG) by using commercially available ELISA kits. 35 heathcare workers served as controls. Results: In patients on regular HD PWV markedly increased and there was several-fold elevation in the interrelated bone-specific proteins (OC, OP, OPG). PWV was found to be independently associated only with OC (β:-0.25, p<0.029) and age (r=0.411,p<0.000), but risk factors for arterial calcification had significant impact on OC (systolic blood pressure, hsCRP, BMI), OPG (age, BMI) and OP (LDL-cholesterol). Conclusion: Except for OC, our results failed to document direct association of vascular lesion with OP and OPG, therefore their high circulating levels may be an epiphenomenon or they may have counter-regulatory role to attenuate the uremic calcification process.