Abstract
Using radioimmunological estimation of beta 2-microglobulin (beta 2M), significantly greater serum values were found in 36 dialysis patients (44.4 +/- 20.3 mg/l) in comparison to healthy probands (1.5 +/- 0.2 mg/l). A significant relation to the duration of dialysis, diuresis and serum aluminium and ferritin was found. The used dialysers MLW 1.3/1.8 m2 (regenerated cellulose membrane) did not eliminate beta 2M from the blood. Significantly greater beta 2M concentrations were observed in patients suffering from arthralgia and bone pain, but not in radiologically verified arthropathy and destructive spondylarthropathy. Post-mortem examinations of 13 patients on haemodialysis treatment for between 10 and 90 months revealed synovial beta 2M-derived (AB-)amyloid deposits in four patients at different joints, but not in radiologically suspect areas. The results suggest that independent of serum beta 2M, beta 2M-derived amyloidosis may occur in elderly patients on dialysis for less than 5 years. Several cases were completely asymptomatic.
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