title: A rapid enzymatic assay for total blood polyamines.
abstract: We have designed a rapid, reliable enzymatic assay for total blood polyamines, as based on the combination of substrate specificity of polyamine oxidase (PAO) from Aspergillus terreus and putrescine oxidase (PUO) from Micrococcus rubens. Quinone dye, derived from hydrogen peroxide generated in the oxidation reaction, is measured spectrophotometrically at 555 nm, and total amounts of putrescine (Put), cadaverine (Cad), spermidine (Spd), and spermine (Spm) can be readily determined. The minimum detection limit is about 0.4 mumol/L whole blood. Bilirubin, hemoglobin, reducing substances, and anticoagulants show no apparent interference. Analytical recovery averaged 98.5%. Within-run and between-day precisions ranged from 1.02% (61.04 mumol/L) to 2.84% (13.07) and 1.54% (50.67) to 3.27% (14.74), respectively. Results obtained with this method and those by high-performance liquid chromatography (HPLC) (r = 0.955) or the enzymatic differential method (r = 0.944) correlated well. In our opinion, this method is superior to other assays being used to determine blood polyamines.
mesh_terms: D000328:Adult; D002851:Chromatography, High Pressure Liquid; D004798:Enzymes; D005260:Female; D006801:Humans; D007202:Indicators and Reagents; D008297:Male; D008875:Middle Aged; D000587:Oxidoreductases Acting on CH-NH Group Donors; D011073:Polyamines / Q000097:blood*; D012016:Reference Values; D013053:Spectrophotometry; D013379:Substrate Specificity; D000097667:Polyamine Oxidase
chemical_list: D004798:Enzymes; D007202:Indicators and Reagents; D000587:Oxidoreductases Acting on CH-NH Group Donors; D011073:Polyamines; D000097667:Polyamine Oxidase