Enzymic assay of plasma cholesterol: a comparison of analytical variations found using the Greiner GSA II and the Technicon SMA 12/60 and SMA II. 1979

J Steinmetz, and E Panek, and E Gaspart

Cholesterol was assayed on the Greiner GSA II and the Technicon SMA 12/60 and SMA II autoanalyzers, with Allain's entirely enzymic method (Allain et al. (1974), Clin. Chem. 20, 470--475). The coefficients of variation in the results over a period of one month were less than 6% with the GSA II and the SMA II, but up to 9% on the SMA 12/60. Although the accuracy of the enzymic method depends on the specificity of the cholesterol oxidase and cholesterol esterase, the results were in good agreement with those obtained by Abell's method (Abell et al. (1952), J. Biol. Chem. 195, 357--366) on fresh or freeze dried human plasma. The cholesterol concentration was stable at 4 degrees C, or in frozen or freeze dried plasma. None of the drugs tested interfered with the enzymic assay.

UI MeSH Term Description Entries
D008722 Methods A series of steps taken in order to conduct research. Techniques,Methodological Studies,Methodological Study,Procedures,Studies, Methodological,Study, Methodological,Method,Procedure,Technique
D002784 Cholesterol The principal sterol of all higher animals, distributed in body tissues, especially the brain and spinal cord, and in animal fats and oils. Epicholesterol
D002788 Cholesterol Esters Fatty acid esters of cholesterol which constitute about two-thirds of the cholesterol in the plasma. The accumulation of cholesterol esters in the arterial intima is a characteristic feature of atherosclerosis. Cholesterol Ester,Cholesteryl Ester,Cholesteryl Esters,Ester, Cholesterol,Ester, Cholesteryl,Esters, Cholesterol,Esters, Cholesteryl
D002789 Cholesterol Oxidase An enzyme that catalyzes the oxidation of cholesterol in the presence of molecular oxygen to 4-cholesten-3-one and hydrogen peroxide. The enzyme is not specific for cholesterol, but will also oxidize other 3-hydroxysteroids. EC 1.1.3.6. Oxidase, Cholesterol
D004356 Drug Storage The process of keeping pharmaceutical products in an appropriate location. Drug Storages,Storage, Drug,Storages, Drug
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001322 Autoanalysis Method of analyzing chemicals using automation. Autoanalyses
D013379 Substrate Specificity A characteristic feature of enzyme activity in relation to the kind of substrate on which the enzyme or catalytic molecule reacts. Specificities, Substrate,Specificity, Substrate,Substrate Specificities

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