A Japanese boy with adenine phosphoribosyltransferase (APRT) deficiency caused by compound heterozygosity including a novel missense mutation in APRT gene.

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Nozue H, Kamoda T, Saitoh H, Ichikawa K, Taniguchi A

A Japanese boy with adenine phosphoribosyltransferase (APRT) deficiency caused by compound heterozygosity including a novel missense mutation in APRT gene.

Acta Paediatr. 2011 Dec;100(12):e285-8. doi: 10.1111/j.1651-2227.2011.02371.x. Epub 2011 Jun 17.

PubMed ID
21635362 [ View in PubMed
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Abstract

We describe a 2-year-old Japanese boy with radiolucent urolithiasis and recurrent urinary tract infection. Urinalysis showed typical 2,8-dihydroxyadenine (2,8-DHA) crystals, leading to a diagnosis as adenine phosphoribosyltransferase (APRT) deficiency. The sensitivity of proliferating T cells to an adenine analogue, whose cytotoxicity is dependent on APRT, showed that he was homozygous or compound heterozygous for the APRT gene mutation. A genetic analysis revealed a compound heterozygous state for M136T and a novel missense mutation L33P, not previously reported in patients with APRT deficiency. CONCLUSION: Adenine phosphoribosyltransferase deficiency should be suspected in all patients with radiolucent kidney stones, urinary 2,8-DHA crystals were an important finding for an early diagnosis of APRT deficiency. Appropriate treatment should be initiated to prevent the development of urolithiasis or renal failure in APRT-deficient children. The T cell method was useful to detect a homozygote or a compound heterozygote of the pathogenic allelic gene in APRT deficiency, and a genetic analysis revealed a novel mutation L33P.

DrugBank Data that Cites this Article

Polypeptides
NameUniProt ID
Adenine phosphoribosyltransferaseP07741Details