• J. Neurol. Neurosurg. Psychiatr. · Aug 2003

    Motor system abnormalities in hereditary spastic paraparesis type 4 (SPG4) depend on the type of mutation in the spastin gene.

    • D Bönsch, A Schwindt, P Navratil, D Palm, C Neumann, S Klimpe, J Schickel, J Hazan, C Weiller, T Deufel, and J Liepert.
    • Institut für Klinische Chemie und Laboratoriumsdiagnostik, Universitätsklinikum Jena, D-07740 Jena, Germany. dominikus.boensch@med.uni-jena.de
    • J. Neurol. Neurosurg. Psychiatr. 2003 Aug 1; 74 (8): 1109-12.

    BackgroundHereditary spastic paraparesis (HSP) denotes a group of inherited neurological disorders with progressive lower limb spasticity as their clinical hallmark; a large proportion of autosomal dominant HSP belongs to HSP type 4, which has been linked to the SPG4 locus on chromosome 2. A variety of mutations have been identified within the SPG4 gene product, spastin.ObjectiveCorrelation of genotype and electrophysiological phenotype.MaterialTwo large families with HSP linked to the SPG4 locus with a very similar disease with respect to age of onset, progression, and severity of symptoms.MethodsMutation analysis was performed by PCR from genomic DNA and cDNA, and direct sequencing. The motor system was evaluated using transcranial magnetic stimulation.ResultsPatients differ in several categories depending on the type of mutation present.ConclusionsFor the first time in hereditary spastic paraparesis, a phenotypic correlate of a given genetic change in the spastin gene has been shown.

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