Heliyon (Mar 2024)

A novel variant in a Chinese boy with lysinuric protein intolerance: A case report and literature review

  • Yanhong Wang,
  • Hongwei Li,
  • Zhanhang Huang,
  • Sen Yang,
  • Chengyu Lu,
  • Wei Zhang,
  • Shangming Zhao,
  • Cui Yang,
  • Dehui Chen

Journal volume & issue
Vol. 10, no. 5
p. e27044

Abstract

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We report a case of a 4-year-old boy with lysinuric protein intolerance in China. The patient presented with interstitial lung disease with obvious clubbing of the fingers and toes. During the course of diagnosis and treatment, we found he was averse to a high-protein diet, intolerant to activity, and had a history of diarrhea and fractures. Physical examination revealed hepatosplenomegaly and clubbing of the fingers and toes. Next-generation sequencing revealed compound heterozygous mutations (c.1387delG, c.958T > C) in SLC7A7, which was confirmed as a disease-causing gene for lysinuric protein intolerance. After a literature review, we found that c.958T > C had not been previously reported, and summarized the clinical and genetic characteristics of patients from different continents. His symptoms improved significantly after 3 months of being on a low-protein diet, supplementation with lysine, citrulline, carnitine, and trace elements, and oral corticosteroid treatment for 2 months. The patient is still under follow-up.

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