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Biochemical markers of vascular calcification in elderly hemodialysis patients

Alvaro Osorio1, Esperanza Ortega, Jesús M Torres

  • 1Vascular Surgery Unit, Sanitas Hospital, Madrid, Spain.

Molecular and Cellular Biochemistry
|November 6, 2012
PubMed

Insights

Chronic kidney disease (CKD) patients on hemodialysis show altered bone metabolism markers, including higher osteoprotegerin (OPG) and osteocalcin (OC), and lower fetuin-A. These changes are linked to vascular calcification and cardiovascular risks.

Area of Science:

  • Nephrology
  • Endocrinology
  • Cardiovascular Medicine

Background:

  • Chronic kidney disease (CKD) is linked to mineral-bone metabolism disturbances, increasing vascular calcification, cardiovascular morbidity, and mortality.
  • Understanding these metabolic alterations is crucial for managing cardiovascular complications in CKD patients.

Purpose of the Study:

  • To identify specific serum markers associated with vascular calcification in elderly male and female hemodialysis CKD patients.
  • To investigate alterations in bone formation and resorption parameters in this patient population.

Main Methods:

  • Serum levels of osteoprotegerin (OPG), fetuin-A, tartrate-resistant acid phosphatase (TRACP-5b), bone-specific alkaline phosphatase (BAP), osteocalcin (OC), intact parathyroid hormone (iPTH), 25(OH)D(3), 1,25(OH)(2)D(3), calcium, and phosphorus were measured.
  • Enzyme immunoassay, immunoenzymometric assay, ELISA, immunoradiometric assay, and photometric assay were employed for sample analysis.

Main Results:

  • Elderly male and female hemodialysis CKD patients exhibited higher serum OPG, BAP, iPTH, phosphorus, and OC levels compared to controls.
  • Conversely, serum 25(OH)D(3), 1,25(OH)(2)D(3), and fetuin-A levels were lower in CKD patients.

Conclusions:

  • Bone formation and resorption parameters are significantly altered in elderly hemodialysis CKD patients.
  • Elevated OPG and OC, along with reduced fetuin-A, are associated with vascular calcification and may contribute to cardiovascular events in CKD.

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