sepharose and Kidney-Diseases

An available method was developed for manual measurements of urea in biological fluids with the use of urease immobilized in sepharose gel. The suggested technique is more reagent-saving (the same reagent may be used for up to 500 times), 3-6-fold more rapid, and twice more sensitive than the routine phenolhypochlorite method with soluble urease. The method is characterized by a high analytical reliability, its results are in high correlation with the soluble urease procedure and with the diacetylmonoxime method (r = 07988 and 0.995, respectively). It is particularly fit for rapid analysis of the urea and convenient for small laboratories.

Topics: Enzymes, Immobilized; Humans; Hydrolysis; Indicators and Reagents; Kidney Diseases; Phenol; Phenols; Reproducibility of Results; Sepharose; Urea; Urease

In this investigation a new possibility of isoenzyme-differentiation of the gamma-glutamyl-transferase (GGT) (EC Nr.2.3.2.2.) was demonstrated by Concanavalin A and Con A-Sepharose. Because of the different sugar content of the glycoproteins distinction between liver- and kidney-GGT is possible. Furthermore it was possible for the first time to show a different precipitation behaviour of one glycoprotein to Concanavalin A in certain diseases. In cases of alcoholic hepatitis GGT looses its Concanavalin A-affinity because of increased neuraminic acid concentration. The possible reasons of the different behaviour to the binding affinity of Con A and Con A-Sepharose and GGT as well as additional use for enzyme-differentiation by Con A-Sepharose affinity chromatography are discussed.

Topics: Azathioprine; Chemical and Drug Induced Liver Injury; Chemical Precipitation; Chromatography, Affinity; Concanavalin A; Ethanol; gamma-Glutamyltransferase; Glycoproteins; Humans; Isoenzymes; Kidney Diseases; Liver Diseases; Neuraminic Acids; Neuraminidase; Polysaccharides; Sepharose