Novel SPG10 mutation associated with dysautonomia, spinal cord atrophy, and skin biopsy abnormality

Authors


Correspondence: Dr N. Collongues, Department of Neurology, University Hospital of Hautepierre, 1, Avenue Molière, 67000 Strasbourg, France (tel.: +33 3 88128547; fax: +33 88128538; e-mail: nicolas.collongues@chru-strasbourg.fr).

Abstract

Background

SPG10 is a rare form of autosomic dominant hereditary spastic paraplegia (HSP) caused by mutations in the KIF5A gene, which may be involved in axonal transport.

Methods

We report the characteristics of a French family with a novel missense mutation c.580 G>C in exon 7 of the KIF5A gene.

Results

The proband and his sister presented with an adult onset HSP, a sensory spinal cord-like syndrome, dysautonomia, and severe axonal polyneuropathy. Contrary to the proband, his sister presented a secondary improvement in spasticity and walking. In the proband, MRI findings consisted in spinal cord atrophy and symmetric cerebral demyelination, whereas the skin biopsy suggested a defect in the number of vesicles and synaptophysin density at the pre-synaptic membrane.

Conclusion

This study extends the phenotype of SPG10 and argues for abnormalities in the axonal vesicular transport.

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