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β2-Microglobulin, pulse pressure and metabolic alterations in hemodialysis patients

Vaia D Raikou1, Nicholas Tentolouris, Despina Kyriaki

  • 11st Department of Medicine-Propaedeutic, School of Medicine, National and Kapodistrian University of Athens, General Hospital Laïko, Athens, Greece. vraikou@med.uoa.gr

Nephron. Clinical Practice
|September 1, 2010
PubMed
Abstract

Insights

Beta-2-microglobulin (β(2)M) levels predict increased pulse pressure (PP) in hemodialysis patients. β(2)M is linked to insulin resistance, with fluid and sodium balance significantly impacting PP.

Area of Science:

  • Nephrology
  • Cardiovascular Medicine
  • Metabolic Disorders

Background:

  • Pulse pressure (PP) in dialysis patients is linked to arterial stiffness and fluid overload.
  • Beta-2-microglobulin (β(2)M) is a potential factor influencing PP and metabolic alterations.

Purpose of the Study:

  • To investigate the role of β(2)M in PP in relation to metabolic changes.
  • To analyze PP in patients undergoing different hemodialysis (HD) modalities.

Main Methods:

  • Studied 76 hemodialyzed patients across three HD modalities.
  • Measured β(2)M, insulin resistance (HOMA-IR), arterial stiffness (PWV), and sodium removal.
  • Assessed β(2)M clearance using Kt/V.

Main Results:

  • β(2)M levels predict increased PP, independent of age, HD modality, duration, HOMA-IR, and sodium removal (p=0.02).
  • β(2)M showed a positive association with HOMA-IR (r=0.306, p=0.007).
  • Serum bicarbonate and pulse wave velocity were inversely associated (r=-0.719, p=0.001).

Conclusions:

  • β(2)M is positively associated with PP, influenced by dialysis fluid/sodium balance more than arterial stiffness.
  • β(2)M correlates with insulin resistance.
  • Uremic acidosis may contribute to arterial stiffness.

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