Standardization of clinical enzyme assays: a reference method for aspartate and alanine transaminases.
نویسندگان
چکیده
منابع مشابه
Standardization of clinical enzyme assays.
During 1969, discussions between the Standards Subcommittee of the Laboratory Equipment and Methods Advisory Group of the Department of Health and Social Security and representatives of professional societies concerned with the assay of enzymes for diagnostic purposes led to the establishment of a working party to consider the current state of accuracy and reliability of diagnostic enzymology a...
متن کاملA systematic approach to enzyme assay optimization illustrated by aminotransferase assays.
We have developed a systematic approach to optimization of reagent concentrations for assays of alanine aminotransferase and aspartate aminotransferase: (a) Michaelis constants describing the initial-velocity kinetics of the coupled enzyme reactions were evaluated by a nonlinear least-squares fit of the appropriate equation to measured enzyme activities. Activities of more than 50 normal and pa...
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Seraclear-HE, containing seven enzyme analytes from human sources, was evaluated as an intermethod calibrator for aspartate aminotransferase (AST) and alanine aminotransferase (ALT) to transfer Reference Method values to seven routine methods, including one based on hydrogen peroxide detection for possible unification of values (interlaboratory comparability of data). The commutabilities of AST...
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Objective This study was performed to identify the correlation between contrast-enhanced ultrasound (CEUS) and contrast-enhanced multidetector computed tomography (CE-MDCT) as well as the correlation between serum liver enzyme concentrations and CE-MDCT in classification of the severity of blunt hepatic trauma using CE-MDCT as a reference standard. Materials and methods A blunt liver trauma mod...
متن کاملOptimization of methods for aspartate aminotransferase and alanine aminotransferase.
Conditions for accurate measurement of catalytic activity of aspartate aminotransferase and alanine aminotransferase in human serum have been reinvestigated. The basic variables (kind of buffer, buffer concentration, pH, ion effects, and the influence of pyridoxal-5-phosphate) can now be considered optimized. On this basis, the kinetic parameters of both aminotransferases were determined, i.e.,...
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ورودعنوان ژورنال:
- Journal of clinical pathology
دوره 25 11 شماره
صفحات -
تاریخ انتشار 1972