Clinical Chemistry
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Clinical Chemistry 39: 93-96, 1993;
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Clinical Chemistry, Vol 39, 93-96, Copyright © 1993 by American Association for Clinical Chemistry

Quantification of beta 2-microglobulin and albumin in plasma and peritoneal dialysis fluid by a noncompetitive immunoenzymometric assay

A Kandoussi, C Cachera, D Pagniez, R Saile and A Tacquet
Laboratoire de Recherches Nephrologiques, Hopital Calmette, Lille, France.

An enzyme-linked immunosorbent assay (ELISA) was developed for measuring beta 2-microglobulin (beta 2m) and albumin in continuous ambulatory peritoneal dialysis (CAPD) fluid. Plasma concentrations of beta 2m were twofold greater in hemodialysis patients (41.3 +/- 13.3 mg/L) than in CAPD patients (23.6 +/- 5.5 mg/L) matched for duration of treatment. Measurement of beta 2m in CAPD fluid showed a substantial loss of this protein, approximately 31% of total body beta 2m, compared with a 5% loss of a protein of middle molecular mass (albumin). Because of the molecular sieving effects of the peritoneal membrane, peritoneal clearance of beta 2m was sixfold greater than that of albumin. Whether beta 2m losses prevent or delay the incidence of dialysis-induced amyloidosis in these patients remains to be established.




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Copyright © 1993 by the American Association for Clinical Chemistry.