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Clinical Chemistry 26: 1677-1682, 1980;
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Clinical Chemistry, Vol 26, 1677-1682, Copyright © 1980 by American Association for Clinical Chemistry

Results with six "kit" radioimmunoassays for primary bile acids in human serum intercompared

A Roda, E Roda, R Aldini, M Capelli, D Festi, C Sama, G Mazzella, AM Morselli and L Barbara

We examined six radioimmunoassay procedures for measuring primary bile acids in human serum (two 3H-labeled and four 125I-labeled). A significant (p < 0.01) correlation was observed between measurements in the assay both for cholic acid and chenodeoxycholic acid, at low and high concentrations of serum bile acids. All kits were acceptable with respect to accuracy, precision, stability, and analytical recovery. All six procedures gave similar results for chenodeoxycholic and cholic acid in sera of 80 healthy subjects; the agreement was also close when the two primary bile acids were compared with their sum in serum. Normal values ranged from 0.4 to 2.5 mumol/L for conjugated chenodeoxycholic acid and from 0.3 to 1.5 mumol/L for conjugated cholic acid. The 125I assays do not require liquid-scintillation equipment but 125I induces a decrease in the affinity constant of antibody. The sensitivity of the assays was still adequate for measuring bile acids in the serum of healthy fasting persons and liver-disease patients.




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Copyright © 1980 by the American Association for Clinical Chemistry.