Complicated forms of autosomal dominant hereditary spastic paraplegia are frequent in SPG10

Published on Feb 1, 2009in Human Mutation4.124
· DOI :10.1002/HUMU.20920
Cyril Goizet17
Estimated H-index: 17
(French Institute of Health and Medical Research),
Amir Boukhris13
Estimated H-index: 13
(French Institute of Health and Medical Research)
+ 9 AuthorsAlexis Brice125
Estimated H-index: 125
Hereditary spastic paraplegias (HSP) constitute a heterogeneous group of neurodegenerative disorders characterized by slowly progressive spasticity of the lower extremities. Only a few different mutations in the SPG10 gene, KIF5A, have been described in pure dominant forms of the disease. We sequenced the motor domain of KIF5A in a large panel of 205 European HSP patients with either pure or complicated forms of the disease. We identified eight different heterozygous missense mutations, seven novels, in eight different families of French origin. Residue R280 was a mutational hot spot. Interestingly, the patients in 7/8 families had a complex phenotype, with peripheral neuropathy, severe upper limb amyotrophy (Silver syndrome-like), mental impairment, parkinsonism, deafness and/or retinitis pigmentosa as variably associated features. We report the largest series of SPG10 families described so far, which extends both the mutational spectrum of the disease and its phenotype, which now includes complicated forms of HSP. SPG10 mutations were found in 10% of our complicated forms of HSP, suggesting that mutations in KIF5A represent the major cause of complicated AD-HSP in France. © 2008 Wiley-Liss, Inc.
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