title: A method for the determination of 5-phosphoribosyl 1-pyrophosphate concentrations in erythrocytes using high-performance liquid chromatography.
abstract: A method for the measurement of erythrocyte 5-phosphoribosyl 1-pyrophosphate (PP-ribose-P) using HPLC is described. Inosinic acid formed from the enzyme-catalyzed reaction of hypoxanthine and PP-ribose-P using partially purified hypoxanthine-guanine phosphoribosyltransferase is measured after chromatography on an ion-exchange column (Partisil 10 SAX). The average recovery of PP-ribose-P added to erythrocytes was 96.6%. Normal values found were 1.3 +/- 0.6 nmol PP-ribose-P/ml packed RBC (20 individuals). Replication experiments gave a coefficient of variation of 4.4%. Elevated levels in the range 4.4-7.9 nmol PP-ribose-P/ml packed RBC were found in four patients with gout and partial deficiency of the enzyme hypoxanthine-guanine phosphoribosyltransferase.
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004912:Erythrocytes / Q000032:analysis*; D006073:Gout / Q000097:blood / Q000235:genetics; D006801:Humans; D007041:Hypoxanthine Phosphoribosyltransferase / Q000172:deficiency; D007291:Inosine Monophosphate / Q000032:analysis; D008297:Male; D010428:Pentosephosphates / Q000097:blood*; D010754:Phosphoribosyl Pyrophosphate / Q000097:blood*
chemical_list: D010428:Pentosephosphates; D007291:Inosine Monophosphate; D010754:Phosphoribosyl Pyrophosphate; D007041:Hypoxanthine Phosphoribosyltransferase