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Keratitis-ichthyosis-deafness syndrome, atypical connexin GJB2 genemutation, and peripheral T-cell lymphoma: more than a random association?

Fozza, Claudio and Poddie, Fausto Pier'Angelo and Contini, Salvatore and Galleu, Antonio and Cottoni, Francesca Maria Giovanna and Longinotti, Maurizio Roberto and Cucca, Francesco (2011) Keratitis-ichthyosis-deafness syndrome, atypical connexin GJB2 genemutation, and peripheral T-cell lymphoma: more than a random association? Case Reports in Hematology, Vol. 2011 , p. 1-3. eISSN 2090-6579. Article.

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DOI: 10.1155/2011/848461

Abstract

Keratitis-ichthyosis-deafness (KID) syndrome is a rare congenital disorder characterized by a variety of skin lesions— that is, palmoplantar keratoderma, thickening of the skin, and erythematous verrucous lesions—neurosensorial hypoacusia, and keratitis with a variable degree of visual impairment. Both sporadic and familial forms of the syndrome have been described, the latter usually showing a dominant pattern of inheritance. The molecular lesion responsible for the syndrome typically involves the connexin 26 (Cx26) gene (GJB2). Most patients display the heterozygous c.148G→A mutation causing the substitution of an aspartic acid for an asparagine at position 50 (p.Asp50Asn), while a few of them show the c.50C→T mutation, implying the substitution of a serine for a phenylalanine at position 17 (p.Ser17Phe). However, even a mutation in the connexin 30 (Cx30) gene (GJB6) has been found in a typical KID patient, thus suggesting a genetic heterogeneity of the syndrome. As connexins are a large family of small integral membrane proteins which influence tissue cornification by modulating the establishment of direct cell-cell communication through gap junction channels, it is likely that defects involving this class of proteins are at the basis of the wellknown increased incidence of squamous cell carcinoma in KID patients.

Item Type:Article
ID Code:6565
Status:Published
Refereed:Yes
Uncontrolled Keywords:Keratitis-Ichthyosis-Deafness (KID) syndrome, Gap Junction Beta-2 (GJB2), M34T
Subjects:Area 06 - Scienze mediche > MED/35 Malattie cutanee e veneree
Area 06 - Scienze mediche > MED/03 Genetica medica
Area 06 - Scienze mediche > MED/15 Malattie del sangue
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze biomediche
001 Università di Sassari > 01 Dipartimenti > Chirurgia, microchirurgia e specialità medico-chirurgiche
Publisher:Hindawi Publishing Corporation
eISSN:2090-6579
Copyright Holders: © 2011 Claudio Fozza et al.
Deposited On:15 Nov 2011 16:30

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