Abstract:
:Schwartz-Jampel syndrome (SJS1) is a rare autosomal recessive disorder characterized by permanent myotonia (prolonged failure of muscle relaxation) and skeletal dysplasia, resulting in reduced stature, kyphoscoliosis, bowing of the diaphyses and irregular epiphyses. Electromyographic investigations reveal repetitive muscle discharges, which may originate from both neurogenic and myogenic alterations. We previously localized the SJS1 locus to chromosome 1p34-p36.1 and found no evidence of genetic heterogeneity. Here we describe mutations, including missense and splicing mutations, of the gene encoding perlecan (HSPG2) in three SJS1 families. In so doing, we have identified the first human mutations in HSPG2, which underscore the importance of perlecan not only in maintaining cartilage integrity but also in regulating muscle excitability.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Nicole S,Davoine CS,Topaloglu H,Cattolico L,Barral D,Beighton P,Hamida CB,Hammouda H,Cruaud C,White PS,Samson D,Urtizberea JA,Lehmann-Horn F,Weissenbach J,Hentati F,Fontaine Bdoi
10.1038/82638keywords:
subject
Has Abstractpub_date
2000-12-01 00:00:00pages
480-3issue
4eissn
1061-4036issn
1546-1718journal_volume
26pub_type
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