Hypoxanthine-guanine phosphoribosyltransferase deficiency in a patient with a Madrid II mutation

Abstract The hypoxanthine-guanine phosphoribosyltransferase deficiency is an inborn error of purine metabolism, linked to the X chromosome. The clinical phenotypes associated with HPRT deficiency varied according to the level of enzyme deficiency, with a large spectrum of neurologic features like se...

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Veröffentlicht in:Joint, bone, spine : revue du rhumatisme bone, spine : revue du rhumatisme, 2013-01, Vol.80 (1), p.93-95
Hauptverfasser: Sapag, Ana, Frischling, Eduardo, Laborde, Hugo
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Sprache:eng
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Zusammenfassung:Abstract The hypoxanthine-guanine phosphoribosyltransferase deficiency is an inborn error of purine metabolism, linked to the X chromosome. The clinical phenotypes associated with HPRT deficiency varied according to the level of enzyme deficiency, with a large spectrum of neurologic features like self-injurious behaviour in patients with complete deficiency. We report a 20-year-old man who had asymmetric polyarthritis, tophi, hyperuricemia, nephrolithiasis and mild neurologic symptoms with undetectable levels of HPRT activity in lysed erythrocytes. The genetic study identified the c.143G>A mutation in exon 3, GAA CGT (CTT > GAA CAT CTT (48arg > his). The presence of gouty arthropathy and chronic hyperuricemia in a young patient with neurological symptoms, suggests HPRT deficiency for which it is necessary its enzyme and molecular determination.
ISSN:1297-319X
1778-7254
DOI:10.1016/j.jbspin.2012.06.020