SPG11 spastic paraplegia |
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Authors: | Dr Mathieu Anheim Clotilde Lagier-Tourenne Giovanni Stevanin Marie Fleury Alexandra Durr Izzie Jacques Namer Paola Denora Alexis Brice Jean Louis Mandel Michel Koenig Christine Tranchant |
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Institution: | 1. Dépt. de Neurologie, H?pital Civil, Centre Hospitalier Universitaire de Strasbourg 1, place de l’H?pital, 67000, Strasbourg, France 2. Institut de Génétique, de Biologie Moléculaire et Cellulaire, CNRS/INSERM/Université Louis Pasteur, Illkirch, France 3. INSERM, UMR_S679, Paris, France 4. UPMC Univ Paris 06, UMR_S679, Groupe Hospitalier Pitié-Salpêtrière, Paris, France 5. Assistance Publique-H?pitaux de Paris, (AP-HP), Groupe Hospitalier Pitié-Salpêtrière, Département de Génétique et de Cytogénétique, Paris, France 6. Service de Biophysique et Médecine Nucléaire, H?pital de Hautepierre, CHU Strasbourg, France
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Abstract: | Autosomal recessive hereditary spastic paraplegia (AR HSP) with thin corpus callosum (TCC) is a rare neurodegenerative disorder
often caused by mutations in the gene encoding for spatacsin at the SPG11 locus on chromosome 15q. The disease is characterized
by progressive spastic paraparesis and mental retardation which occur during the first two decades of life and frequently
with peripheral neuropathy. Brain magnetic resonance imaging (MRI) reveals typical TCC with periventricular white matter changes.
We describe two patients, of Turkish descent, from the same consanguineous family and affected with SPG11 in association with
unusual early-onset parkinsonism. Parkinsonism occurred during the very early stages of SPG11 in both patients, being in one
the inaugural symptom of the disease presented as a resting tremor with akinesia, rigidity and expressing an initial moderate
levodopa-response that progressively weakened. The second patient presented a resting tremor with mild akinesia and no levodopa-response.
Both patients were affected with progressive spastic paraparesis which had initially occurred at 15 and 12 years of age, respectively,
in association with mild mental retardation and an axonal polyneuropathy. TCC with periventricular white matter changes (PWMC)
was evident by MRI and 123I-ioflupane SPECT was abnormal. Genetic analysis detected for both patients a new c.704_705delAT, p.H235RfsX12 homozygous
mutation in SPG11. This report provides evidence that parkinsonism may initiate SPG11-linked HSP TCC and that SPG11 may cause juvenile parkinsonism. |
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Keywords: | parkinsonism spastic paraplegia SPG11 thin corpus callosum |
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