by R d G. Worton Charcot-Marie tooth disease, a pathologically and genetically heterogeneous group of disorders that causes a progressive neuropathy, is characterized by weakness and atrophy, primarily in peroneal and distal leg muscles. It is defined patholog-Mutation leads to 10s:. of this Mae 111
X-LINKED CHARCOT-MARIE-TOOTH DISEASE AND CONNEXIN32
β Scribed by Victor V. Ionasescu
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 166 KB
- Volume
- 22
- Category
- Article
- ISSN
- 1065-6995
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β¦ Synopsis
We studied 29 families with X-linked dominant CMT (CMTX1) neuropathy. Twenty-five families showed mutations in the coding region of the connexin32 (Cx32) gene. The mutations included five nonsense mutations, 17 missense mutations, two medium size deletions and one insertion. Most missense mutations showed a mild clinical phenotype and slowing of motor nerve conduction velocities. All five nonsense mutations, the larger deletion and the insertion showed severe clinical phenotype. Four CMTX1 families with mild clinical phenotype showed no point mutations of the Cx32 gene coding region. Two mutations of the non-coding region were identified. The first mutation was located in the nerve specific Cx32 promoter, the second mutation was located in the 5 untranslated region of the mRNA.
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X-linked Charcot-Marie-Tooth disease (CMT-X) is caused by mutations of connexin-32 (Cx-32), which encodes a gap-junction protein. Whether the neuropathy is primarily demyelinative or axonal remains to be established. We report findings of prominent demyelination in a 71-year-old woman with late-ons
We studied the relationship between the genotype and clinical phenotype in 27 families with dominant X-linked Charcot-Marie-Tooth (CMTX1) neuropathy. Twenty-two families showed mutations in the coding region of the connexin32 (cx32) gene. The mutations include four nonsense mutations, eight missense
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X-linked Charcot-Marie-Tooth disease (CMTX) is the second most common form of Charcot-Marie-Tooth disease. Variable histopathological and nerve conduction velocity (NCV) results have suggested either a primary demyelinating or axonal polyneuropathy. We identified five individuals across three genera