title: Determination of guanase activity in normal and pathological sera by high-performance liquid chromatography.
abstract: A simple HPLC assay for serum guanase based on the direct determination of enzymatically formed xanthine was applied to normal and pathological sera. The procedure is sensitive, precise (CV below 5%) and suitable for routine purposes, and the method requires only 50 microL of sample. Using this method the reference range as determined from the sera of 40 healthy adult controls is 0-1.1 U/L. In patients with various liver diseases serum guanase activities were found to be increased 5- to 50-fold compared with the normal mean value.
authors.affiliation: Dipartimento di Chimica, Università La Sapienza, Rome, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Canepari
authors.forename: P
authors.initials: P
authors.lastname: Castellano
authors.forename: E
authors.initials: E
authors.lastname: Cernia
authors.forename: A M
authors.initials: AM
authors.lastname: Girelli
authors.forename: A
authors.initials: A
authors.lastname: Bozza
mesh_terms: D000328:Adult; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005260:Female; D006148:Guanine Deaminase / Q000097:blood*; D006801:Humans; D008107:Liver Diseases / Q000201:enzymology*; D008297:Male; D015203:Reproducibility of Results; D013056:Spectrophotometry, Ultraviolet
chemical_list: D006148:Guanine Deaminase