Novel mutation in Sjögren-Larsson syndrome is associated with divergent neurologic phenotypes

Kathleen Davis, Kenton R. Holden, Dana S'Aulis, Claudia Amador, M. Gisele Matheus, William B. Rizzo

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

Sjögren-Larsson syndrome is an inherited disorder of lipid metabolism caused by mutations in the ALDH3A2 gene that codes for fatty aldehyde dehydrogenase, which results in accumulation of fatty aldehydes and alcohols and is characterized by ichthyosis, intellectual disability, and spastic diplegia/quadriplegia. The authors describe 2 unrelated Honduran patients who carried the same novel homozygous nonsense mutation (c.1309A>T, p.K437X) and ALDH3A2 DNA haplotype, but widely differed in disease severity. One patient exhibited spastic quadriplegia with unusual neuroregression, whereas the other patient had the usual static form of spastic diplegia with neurodevelopmental disabilities. Biochemical analyses showed a similar profound deficiency of fatty aldehyde dehydrogenase activity and impaired fatty alcohol metabolism in both patients' cultured fibroblasts. These results indicate that variation in the neurologic phenotype of Sjögren-Larsson syndrome is not strictly determined by the ALDH3A2 mutation or the biochemical defect as expressed in cultured fibroblasts, but by unidentified epigenetic/environmental factors, gene modifiers, or other mechanisms.

Original languageEnglish (US)
Pages (from-to)1259-1265
Number of pages7
JournalJournal of Child Neurology
Volume28
Issue number10
DOIs
StatePublished - Oct 2013

Keywords

  • Sjögren-Larsson
  • aldehyde dehydrogenase
  • fatty alcohol
  • ichthyosis
  • mutation
  • neurologic
  • phenotype
  • spasticity

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Clinical Neurology

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