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Role of the hemodialysis vascular access type in inflammation status and monocyte activation

Luigi Colì1, Gabriele Donati, Maria L Cappuccilli

  • 1Nephrology, Dialysis and Renal Transplant Unit, S Orsola University Hospital, Bologna, Italy.

The International Journal of Artificial Organs
|July 5, 2011
PubMed

Insights

Arterovenous grafts (AVG) and tunneled cuffed catheters (TCC) used for hemodialysis are linked to increased inflammation and monocyte activation compared to arterovenous fistulas (AVF). These access types promote monocyte senescence, impacting patient inflammatory status.

Area of Science:

  • Nephrology
  • Immunology
  • Vascular Surgery

Background:

  • Hemodialysis requires reliable vascular access, with options including arterovenous fistula (AVF), arterovenous graft (AVG), and tunneled cuffed catheters (TCC).
  • The choice of vascular access may influence patient inflammatory status, monocyte function, and cellular senescence.

Purpose of the Study:

  • To investigate the association between different vascular access types (AVF, AVG, TCC) and inflammatory markers, monocyte activation, and senescence in hemodialysis patients.

Main Methods:

  • 126 hemodialysis patients (51 AVF, 32 AVG, 43 TCC) and 40 healthy controls were analyzed.
  • Serum levels of albumin, CRP, IL-6, and TNF-a were measured.
  • Monocyte surface expression of CD14, CD44, CD32, and the percentage of CD14+CD32+ senescent monocytes were assessed.

Main Results:

  • AVG and TCC groups showed higher levels of inflammatory markers (CRP, TNF-a, IL-6) compared to the AVF group.
  • Monocyte activation markers (CD14, CD32, CD44) were upregulated in TCC patients versus AVF patients.
  • No significant differences in inflammatory markers or monocyte activation were found between AVG and TCC groups, nor in the percentage of senescent monocytes across groups.

Conclusions:

  • Arterovenous grafts and tunneled cuffed catheters are associated with heightened inflammatory responses and increased monocyte activation and senescence compared to arterovenous fistulas.
  • These findings highlight the impact of vascular access type on the systemic inflammatory milieu in hemodialysis patients.
Abstract

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