Measurement of β-methyldigoxin level in serum from patients by enzyme immunoassay using novel specific antiserum with a phenyl boric acid column

被引:1
作者
Higashi, Y [1 ]
Watanabe, N [1 ]
Sasaki, T [1 ]
Fujii, Y [1 ]
机构
[1] Hokuriku Univ, Fac Pharmaceut Sci, Dept Analyt Chem, Kanazawa, Ishikawa 9201181, Japan
关键词
beta-methyldigoxin; enzyme immunoassay; anti-beta-methyldigoxin 3 '-hemisuccinate; bovine serum albumin antiserum; anti-digoxin antiserum; phenyl boric acid column;
D O I
10.1097/00007691-200308000-00006
中图分类号
R446 [实验室诊断]; R-33 [实验医学、医学实验];
学科分类号
1001 ;
摘要
The authors compared serum beta-methyldigoxin (MDx) levels in digitalized patients by enzyme immunoassay (EIA) using anti-MDx 3'-hemisuccinate BSA antiserum (antiserum-I) with commercial antidigoxin antiserum (antiserum-II). The usefulness of a phenyl boric acid (PBA) column for pretreatment of the serum samples was also investigated. The assay using antiserum-I demonstrated good accuracy and precision in the concentration range of 0.5 to 5 ng/mL. When the specificities of antiserum-I and antiserum-II were assessed by cross-reactivity studies with various related compounds, antiserum-I was much more specific for MDx antiserum-II. Using a phenyl boric acid (PBA) column, MDx, and digoxigenin, which exhibits a negligible cross-reactivity, were separated from serum, including MDx and its metabolites. The recovery tests of MDx using antiserum-I with a PBA column in human serum were satisfactory and no interference of metabolites of MDx was observed. Mean MDx concentrations in serum samples (n = 30) from digitalized patients by EIA using antiserum-I with PBA column, antiserum-I, and antiserum-II were 1.06, 1.30, and 1.74 ng/mL, respectively. These results indicate that our EIA system using antiserum-I with a PBA column for pretreatment of serum samples is useful to more precisely measure the unchanged type of MDx in patients.
引用
收藏
页码:452 / 456
页数:5
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