Genetic background of uric acid metabolism in a patient with severe chronic tophaceous gout
Language English Country Netherlands Media print-electronic
Document type Case Reports, Journal Article
PubMed
27288985
DOI
10.1016/j.cca.2016.06.007
PII: S0009-8981(16)30252-2
Knihovny.cz E-resources
- Keywords
- ABCG2, Gout, Hyperuricemia, Hypoxanthine-guanine phosphoribosyltransferase deficiency, Tophi, Urate transporter,
- MeSH
- ATP Binding Cassette Transporter, Subfamily G, Member 2 genetics MeSH
- Chronic Disease MeSH
- Gout genetics metabolism MeSH
- Genetic Background * MeSH
- Hypoxanthine Phosphoribosyltransferase deficiency genetics metabolism MeSH
- Uric Acid metabolism MeSH
- Middle Aged MeSH
- Humans MeSH
- Mutation MeSH
- Neoplasm Proteins genetics MeSH
- Organic Anion Transporters genetics MeSH
- Check Tag
- Middle Aged MeSH
- Humans MeSH
- Male MeSH
- Publication type
- Journal Article MeSH
- Case Reports MeSH
- Names of Substances
- ATP Binding Cassette Transporter, Subfamily G, Member 2 MeSH
- ABCG2 protein, human MeSH Browser
- Hypoxanthine Phosphoribosyltransferase MeSH
- Uric Acid MeSH
- Neoplasm Proteins MeSH
- Organic Anion Transporters MeSH
- urate transporter MeSH Browser
Hyperuricemia depends on the balance of endogenous production and renal excretion of uric acid. Transporters for urate are located in the proximal tubule where uric acid is secreted and extensively reabsorbed: secretion is principally ensured by the highly variable ABCG2 gene. Enzyme hypoxanthine-guanine phosphoribosyltransferase (HPRT) plays a central role in purine metabolism and its deficiency is an X-linked inherited metabolic disorder associated with clinical manifestations of purine overproduction. Here we report the case of a middle-aged man with severe chronic tophaceous gout with a poor response to allopurinol and requiring repeated surgical intervention. We identified the causal mutations in the HPRT1 gene, variant c.481G>T (p.A161S), and in the crucial urate transporter ABCG2, a heterozygous variant c.421C>A (p.Q141K). This case shows the value of an analysis of the genetic background of serum uric acid.
References provided by Crossref.org
The impact of dysfunctional variants of ABCG2 on hyperuricemia and gout in pediatric-onset patients
