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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Steroid responsive polyneuropathy in a family with a novel myelin protein zero mutation.

OBJECTIVE: To report a novel hereditary motor and sensory neuropathy (HMSN) phenotype, with partial steroid responsiveness, caused by a novel dominant mutation in the myelin protein zero ( MPZ) gene. Most MPZ mutations lead to the HMSN type I phenotype, with recent reports of Déjérine-Sottas, congenital hypomyelination, and HMSN II also ascribed to MPZ mutations. Differing phenotypes may reflect the effect of particular mutations on MPZ structure and adhesivity. METHODS: Clinical, neurophysiological, neuropathological, and molecular genetic analysis of a family presenting with an unusual hereditary neuropathy. RESULTS: Progressive disabling weakness, with positive sensory phenomena and areflexia, occurred in the proband with raised CSF protein and initial steroid responsiveness. Nerve biopsy in a less severely affected sibling disclosed a demyelinating process with disruption of compacted myelin. The younger generation were so far less severely affected, becoming symptomatic only after 30 years. All affected family members were heterozygous for a novel MPZ mutation (Ile99Thr), in a conserved residue. CONCLUSIONS: This broadens the range of familial neuropathy associated with MPZ mutations to include steroid responsive neuropathy, initially diagnosed as chronic inflammatory demyelinating polyneuropathy.[1]


  1. Steroid responsive polyneuropathy in a family with a novel myelin protein zero mutation. Donaghy, M., Sisodiya, S.M., Kennett, R., McDonald, B., Haites, N., Bell, C. J. Neurol. Neurosurg. Psychiatr. (2000) [Pubmed]
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