A case of xanthinuria type I with a novel mutation in xanthine dehydrogenase
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- 作者：Akira Iguchi ; Takaaki Sato ; Mihoko Yamazaki ; Kazuyuki Tasaki…
- 关键词：Exercise ; induced acute kidney injury ; Hypouricemia ; Xanthinuria ; Xanthine oxidase
- 刊名：CEN Case Reports
- 出版年：2016
- 出版时间：November 2016
- 年：2016
- 卷：5
- 期：2
- 页码：158-162
- 全文大小：
- 刊物主题：Nephrology; Urology;
- 出版者：Springer Japan
- ISSN：2192-4449
- 卷排序：5
文摘
Hereditary hypouricemia is generally caused by renal hypouricemia, an autosomal recessive disorder that is characterized by impaired renal tubular uric acid transport, or by xanthinuria, a rare autosomal recessive disorder caused by a deficiency of xanthine dehydrogenase (XDH; xanthinuria type I) or by a deficiency of both XDH and aldehyde oxidase (xanthinuria type II). In contrast to renal hypouricemia, which sometimes leads to exercise-induced acute kidney injury (EIAKI), xanthinuria has not been associated with this disorder. We report here a case of xanthinuria type I due to a compound heterozygous mutation. A 46-year-old woman was found to have undetectable plasma and urinary levels of uric acid. She had no symptoms and no history of EIAKI. Xanthinuria type I was diagnosed following the allopurinol loading test. Mutation analysis revealed a compound heterozygous mutation [c.305A>G (p.Gln102Arg) and c.2567delC (p.Thr856Lysfs*73)] in the XDH gene. Of these two mutations, the former is novel. The patient did not exhibit EIAKI. However, because xanthinuria is a rare disease, the identification of additional cases is necessary to determine whether this disease is complicated with EIAKI.