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

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.

journal_name

J Child Neurol

authors

Davis K,Holden KR,S'Aulis D,Amador C,Matheus MG,Rizzo WB

doi

10.1177/0883073812460581

subject

Has Abstract

pub_date

2013-10-01 00:00:00

pages

1259-65

issue

10

eissn

0883-0738

issn

1708-8283

pii

0883073812460581

journal_volume

28

pub_type

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