title: Genetic heterogeneity in autosomal recessive hereditary motor and sensory neuropathy with focally folded myelin sheaths (CMT4B).
abstract: Hereditary motor and sensory neuropathy with focally folded myelin sheaths, or Charcot-Marie-Tooth disease neuropathy type 4B (CMT4B), is a distinct clinical and genetic entity belonging to the heterogeneous group of autosomal recessive demyelinating neuropathies. We previously described a large pedigree with CMT4B and found evidence of linkage to chromosome 11q23. We now describe a second, unrelated family in which two individuals were affected with CMT4B. We exclude the disease locus segregating in this smaller pedigree from the 11q23 region as well as from most of the regions where other CMT loci have been mapped. We thus provide evidence for a second locus causing the CMT4B phenotype.
authors.affiliation: Institute of Neurology School of Medicine Catanzaro, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Gambardella
authors.forename: A
authors.initials: A
authors.lastname: Bolino
authors.forename: M
authors.initials: M
authors.lastname: Muglia
authors.forename: P
authors.initials: P
authors.lastname: Valentino
authors.forename: F
authors.initials: F
authors.lastname: Bono
authors.forename: R L
authors.initials: RL
authors.lastname: Oliveri
authors.forename: M
authors.initials: M
authors.lastname: Sabatelli
authors.forename: V
authors.initials: V
authors.lastname: Brancolini
authors.forename: C
authors.initials: C
authors.lastname: Van Broeckhoven
authors.forename: G
authors.initials: G
authors.lastname: Romeo
authors.forename: M
authors.initials: M
authors.lastname: Devoto
authors.forename: A
authors.initials: A
authors.lastname: Quattrone
mesh_terms: D000328:Adult; D002607:Charcot-Marie-Tooth Disease / Q000145:classification* / Q000235:genetics* / Q000473:pathology; D002880:Chromosomes, Human, Pair 11 / Q000235:genetics; D005260:Female; D005808:Genes, Recessive / Q000235:genetics*; D014644:Genetic Variation / Q000235:genetics*; D006239:Haplotypes / Q000235:genetics; D006801:Humans; D008297:Male; D018895:Microsatellite Repeats / Q000235:genetics; D008854:Microscopy, Electron; D009186:Myelin Sheath / Q000648:ultrastructure*; D010375:Pedigree