HPRT-related hyperuricemia with a novel p.V35M mutation in HPRT1 presenting familial juvenile gout.
CEN Case Rep
; 9(3): 210-214, 2020 08.
Article
em En
| MEDLINE
| ID: mdl-32128695
ABSTRACT
Unlike complete deficiency of hypoxanthine phosphoribosyltransferase (HPRT) (i.e., Lesch-Nyhan syndrome), partial HPRT deficiency causes HPRT-related hyperuricemia without neurological symptoms. Herein, we describe a 22-year-old man without neurological symptoms that presented gout, hyperuricemia (serum urate level, 12.2 mg/dL), multiple renal microcalculi, and a family history of juvenile gout that was exhibited by his brother and grandfather. Genetic testing revealed a novel missense mutation, c.103G>A (p.V35M), in the HPRT1 gene, and biochemical testing (conducted using the patient's erythrocytes) showed that the patient retained only 12.4% HPRT enzymatic activity compared to that exhibited by a healthy control subject. We thus diagnosed the patient with HPRT-related hyperuricemia caused by partial HPRT deficiency. After his serum urate level was controlled via treatment with febuxostat, his gout did not recur. Thus, this study emphasizes that HPRT deficiency should be considered as a potential cause of familial juvenile gout, even in the absence of neurological symptoms.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Hiperuricemia
/
Gota
/
Hipoxantina Fosforribosiltransferase
/
Nefropatias
Tipo de estudo:
Diagnostic_studies
/
Etiology_studies
Limite:
Adult
/
Humans
/
Male
Idioma:
En
Revista:
CEN Case Rep
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Japão