title: Incorporation of hypoxanthine into adenine and guanine nucleotides by human platelets.
abstract: 1. Incubation (1-4 h) of normal human washed platelets (5-11-10-8 per ml) with [8-14C] hypoxanthine at a concentration of 10-5 M resulted in a linear incorporation of radioactivity into adenine and guanine nucleotides. 2. Washed platelets from patients with Lesch-Nyhan syndrome, deficient in hypoxanthine: guanine phosphoribosyltransferase, failed to demonstrate any significant incorporation of [8-14C] hypoxanthine but did incorporate [8-14C] adenine like normal platelets under the same incubation condition. 3. These findings are taken to indicate that normal platelets have the enzymes necessary for salvage of hypoxanthine and that hypoxanthine: guanine phosphoribosyltransferase is the obligatory first step in this pathway.
mesh_terms: D000225:Adenine / Q000097:blood; D000227:Adenine Nucleotides / Q000097:blood*; D001792:Blood Platelets / Q000378:metabolism*; D002852:Chromatography, Ion Exchange; D002855:Chromatography, Thin Layer; D006150:Guanine Nucleotides / Q000097:blood*; D006801:Humans; D007042:Hypoxanthines / Q000097:blood*; D007926:Lesch-Nyhan Syndrome / Q000378:metabolism; D010430:Pentosyltransferases / Q000378:metabolism; D013997:Time Factors
chemical_list: D000227:Adenine Nucleotides; D006150:Guanine Nucleotides; D007042:Hypoxanthines; D010430:Pentosyltransferases; D000225:Adenine