Transaldolase deficiency caused by the homozygous p.R192C mutation of the TALDO1 gene in four Emirati patients with considerable phenotypic variability

Aisha M. Al-Shamsi, Salma Ben-Salem, Jozef Hertecant, Fatma Al-Jasmi

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Transaldolase deficiency is a heterogeneous disorder of carbohydrate metabolism characterized clinically by dysmorphic features, cutis laxa, hepatosplenomegaly, hepatic fibrosis, pancytopenia, renal and cardiac abnormalities, and urinary excretion of polyols. This report describes four Emirati patients with transaldolase deficiency caused by the homozygous p.R192C missense mutation in TALDO1 displaying wide phenotypic variability. The patients had variable clinical presentations including hepatosplenomegaly, pancytopenia, liver failure, proteinuria, hydrops fetalis, cardiomyopathy, and skin manifestations (e.g., dryness, cutis laxa, ichthyosis, telangiectasias, and hemangiomas). Biochemical analyses including urinary concentration of polyols were consistent with transaldolase deficiency. The mutation p.R192C was previously identified in an Arab patient, suggesting a founder effect in Arab populations. Conclusion: The above findings support the premise that biallelic mutations in TALDO1 are responsible for transaldolase deficiency and confirm the broad phenotypic variability of this condition, even with the same genotype.

Original languageEnglish
Pages (from-to)661-668
Number of pages8
JournalEuropean Journal of Pediatrics
Volume174
Issue number5
DOIs
Publication statusPublished - May 1 2015

Keywords

  • Founder mutation
  • Phenotypic variability
  • TALDO1
  • Transaldolase deficiency

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health

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