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Effects of renal failure on complement C3d levels.

R T Krediet1, S S Asghar, G C Koomen

  • 1Department of Internal Medicine, University of Amsterdam, Academic Medical Center, The Netherlands.

Nephron
|January 1, 1991
PubMed
Summary
This summary is machine-generated.

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[Renal function assessment].

Nederlands tijdschrift voor geneeskunde·2007

Elevated C3d levels in blood indicate complement system activation. Impaired kidney function, specifically creatinine over 200 µmol/l, elevates C3d, suggesting renal handling affects its concentration.

Area of Science:

  • Nephrology
  • Immunology
  • Biochemistry

Background:

  • Elevated plasma C3d concentrations are associated with complement system activation.
  • Understanding factors influencing C3d levels is crucial for accurate interpretation.

Purpose of the Study:

  • To investigate the impact of renal function on plasma C3d concentrations.
  • To assess C3d levels in patients with varying degrees of renal impairment, chronic renal failure, and continuous ambulatory peritoneal dialysis (CAPD).

Main Methods:

  • Analysis of plasma C3d concentrations in patient cohorts with different renal function statuses.
  • Correlation of C3d levels with plasma creatinine concentrations.
  • Evaluation of peritoneal permeability to C3d in CAPD patients.

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Main Results:

  • Elevated plasma C3d concentrations were observed in patients with plasma creatinine exceeding 200 µmol/l, irrespective of the underlying kidney disease.
  • The observed elevation is likely due to renal handling processes, including glomerular filtration, tubular reabsorption, and renal catabolism.
  • Peritoneal permeability to C3d was slightly lower than predicted by its molecular weight, with no evidence of local C3d production.

Conclusions:

  • Renal function significantly influences plasma C3d concentrations.
  • Plasma creatinine levels above 200 µmol/l are associated with elevated C3d.
  • Consideration of renal function is essential for interpreting elevated C3d levels, particularly in patients with kidney disease.