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Imbalance between detached circulating endothelial cells and endothelial progenitor cells in chronic kidney disease

Ernesto Rodríguez-Ayala1, Qiang Yao, Carolina Holmén

  • 1Division of Renal Medicine and Baxter Novum, Karolinska Institutet, Karolinska University Hospital at Huddinge, Stockholm, Sweden.

Blood Purification
|December 24, 2005
PubMed

Insights

Patients with chronic kidney disease (CKD) have more circulating detached endothelial cells (CECs) and fewer endothelial progenitor cells (EPCs), indicating endothelial damage. Angiotensin-converting enzyme (ACE) inhibitors may increase EPC levels in CKD patients.

Area of Science:

  • Cardiovascular Medicine
  • Nephrology
  • Immunology

Background:

  • Chronic kidney disease (CKD) is associated with endothelial dysfunction and increased risk of atherosclerotic cardiovascular disease (CVD).
  • Circulating detached endothelial cells (CECs) and endothelial progenitor cells (EPCs) may serve as indicators of endothelial damage and repair.
  • Endothelial dysfunction is a key factor in the progression of CKD and its cardiovascular complications.

Purpose of the Study:

  • To investigate the levels of CECs and EPCs in patients with advanced CKD.
  • To determine the correlation between CECs, EPCs, and endothelial inflammation markers in CKD.
  • To explore the potential impact of ACE inhibitors on EPC levels in CKD patients.

Main Methods:

  • Quantification of CECs (MICA+ cells) and EPCs (Tie-2+ or VEGFR-2+ cells) in 19 advanced CKD patients and 20 healthy controls.
  • Analysis of CD-31+ cell levels in both groups.
  • Correlation of cell levels with clinical parameters, including ACE inhibitor use.

Main Results:

  • CKD patients exhibited significantly increased MICA+ CECs and elevated CD-31+ cells compared to controls.
  • Significantly decreased levels of Tie-2+ and VEGFR-2+ EPCs were observed in CKD patients.
  • A trend towards higher VEGFR-2+ EPC levels was noted in CKD patients using ACE inhibitors.

Conclusions:

  • A significant imbalance exists between CECs and EPCs in advanced CKD patients, suggesting impaired endothelial repair mechanisms.
  • Inflammatory endothelial markers may play a crucial role in CKD-related endothelial dysfunction.
  • Further research is warranted to elucidate the role of ACE inhibitors in modulating EPCs and their clinical implications in CKD.
Abstract

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