J Med Genet 2000;37:50-51 ( January )

Short report

A connexin 26 mutation causes a syndrome of sensorineural hearing loss and palmoplantar hyperkeratosis (MIM 148350) Kirsten Heathcote, Petros Syrris, Nicholas D Carter, Michael A Patton

Medical Genetics Unit, St George's Hospital Medical School, Tooting, London SW17 0RE, UK

Correspondence to: Dr Heathcote

Revised version received 22 July 1999; Accepted for publication 27 August 1999

We report a missense mutation in the connexin 26 gene (GJB2) in a family with an autosomal dominant syndrome of hearing loss and hyperkeratosis. The affected family members have high frequency, slowly progressive, bilateral, sensorineural hearing loss and palmoplantar hyperkeratosis. The mutation causes an amino acid substitution (G59A), which may disrupt a reverse turn in the first extracellular loop of connexin 26. Connexin 26 mutations have been reported in syndromes of deafness and palmoplantar keratoderma. These data provide additional evidence for the role of connexin 26 in syndromes of this type.


Keywords: sensorineural hearing loss; palmoplantar hyperkeratosis; connexin 26

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© 2000 by J Med Genet
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