Open Access

Idiopathic renal hypouricemia: A case report and literature review

  • Authors:
    • Cuiyu Wang
    • Jin Wang
    • Song Liu
    • Xinhua Liang
    • Yifan Song
    • Ling Feng
    • Lanxin Zhong
    • Xiaohua Guo
  • View Affiliations

  • Published online on: October 4, 2019     https://doi.org/10.3892/mmr.2019.10726
  • Pages: 5118-5124
  • Copyright: © Wang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Idiopathic renal hypouricemia is a rare hereditary condition. Type 2 renal hyperuricemia (RHUC2) is caused by a mutation in the SLC2A9 gene, which encodes a high‑capacity glucose and urate transporter, glucose transporter (GLUT)9. RHUC2 predisposes to exercise‑induced acute renal failure (EIARF) and nephrolithiasis, which is caused by a defect in renal tubular urate transport and is characterized by increased clearance of renal uric acid. In the present study a case of a 35‑year‑old Chinese man with EIARF is reported. The patient had isolated renal hypouricemia, with a serum uric acid level of 21 µmol/l and a fractional excretion of uric acid of 200%. The mutational analysis revealed a homozygous mutation (c.857G>A in exon 8) in the SLC2A9 gene. The patient's family members carried the same mutation, but were heterozygous and clinically asymptomatic. In conclusion, to the best of our knowledge, this is the first report of a RHUC2 patient with a GLUT9 mutation, p.W286X, which may be a pathogenic mutation of RHUC2. Further investigation into the functional role of GLUT9 in this novel SLC2A9 mutation is required.
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December-2019
Volume 20 Issue 6

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Spandidos Publications style
Wang C, Wang J, Liu S, Liang X, Song Y, Feng L, Zhong L and Guo X: Idiopathic renal hypouricemia: A case report and literature review. Mol Med Rep 20: 5118-5124, 2019
APA
Wang, C., Wang, J., Liu, S., Liang, X., Song, Y., Feng, L. ... Guo, X. (2019). Idiopathic renal hypouricemia: A case report and literature review. Molecular Medicine Reports, 20, 5118-5124. https://doi.org/10.3892/mmr.2019.10726
MLA
Wang, C., Wang, J., Liu, S., Liang, X., Song, Y., Feng, L., Zhong, L., Guo, X."Idiopathic renal hypouricemia: A case report and literature review". Molecular Medicine Reports 20.6 (2019): 5118-5124.
Chicago
Wang, C., Wang, J., Liu, S., Liang, X., Song, Y., Feng, L., Zhong, L., Guo, X."Idiopathic renal hypouricemia: A case report and literature review". Molecular Medicine Reports 20, no. 6 (2019): 5118-5124. https://doi.org/10.3892/mmr.2019.10726