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Updated: Jul 2, 2025

In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila
Published on: August 20, 2019
Leigh syndrome with developmental regression and ataxia due to a novel splicing variant in the PMPCB gene
Emma Matthews1, Ella F Whittle2, Faraan Khan3
1Atkinson-Morley Neuromuscular Centre, Department of Neurology, St George's University Hospitals NHS Foundation Trust, and Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK. e.matthews@sgul.ac.uk.
Abstract:
Only five children with pathogenic PMPCB gene variants have been described and all carried missense variants. Clinical features included a Leigh-like syndrome of developmental regression, basal ganglia lesions and ataxia with or without dystonia and epilepsy. Three of the five died in childhood and none was older than age six when described. We report the first splice site variant in the PMPCB gene in a 39-year old individual who experienced developmental regression and ataxia following otitis media in childhood. A minigene assay confirms this variant results in aberrant splicing and skipping of exon 12.
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