Novel homozygous GBA2 mutation in a patient with complicated spastic paraplegia

Giulia Coarelli, Silvia Romano, Lorena Travaglini, Michela Ferraldeschi, Francesco Nicita, Maria Spadaro, Arianna Fornasiero, Marina Frontali, Marco Salvetti, Enrico Bertini, Giovanni Ristori

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Abstract

Hereditary spastic paraplegias (HSPs) are a heterogeneous group of neurological disorders characterized primarily by a pyramidal syndrome with lower limb spasticity, which can manifest as pure HSP or associated with a number of neurological or non-neurological signs (i.e., complicated HSPs). The clinical variability of HSPs is associated with a wide genetic heterogeneity, with more than eighty causative genes known. Recently, next generation sequencing (NGS) has allowed increasing genetic definition in such a heterogeneous group of disorders. We report on a 56- year-old man affected by sporadic complicated HSP consisting of a pyramidal syndrome, cerebellar ataxia, congenital cataract, pes cavus, axonal sensory-motor peripheral neuropathy and cognitive decline. Brain MRI showed cerebellar atrophy and thin corpus callosum. By NGS we found a novel homozygous biallelic c.452-1G > C mutation in the b-glucosidase 2 gene (GBA2), known to be causative for autosomal recessive hereditary spastic paraplegia type 46 (SPG46). The rarity of this inherited form besides reporting on a novel mutation, expands the genetic and clinical spectrum of SPG46 related HSP.

Original languageEnglish
Pages (from-to)60-63
Number of pages4
JournalClinical Neurology and Neurosurgery
Volume168
DOIs
Publication statusPublished - May 2018

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Coarelli, G., Romano, S., Travaglini, L., Ferraldeschi, M., Nicita, F., Spadaro, M., Fornasiero, A., Frontali, M., Salvetti, M., Bertini, E., & Ristori, G. (2018). Novel homozygous GBA2 mutation in a patient with complicated spastic paraplegia. Clinical Neurology and Neurosurgery, 168, 60-63. https://doi.org/10.1016/j.clineuro.2018.02.042