title: Phenotype-genotype correlations for clinical variants caused by CYLD mutations.
abstract: Brooke-Spiegler syndrome (BSS; OMIM 605041) is an autosomal dominant condition characterized by skin appendageal neoplasms including cylindromas, trichoepitheliomas, and/or spiradenomas. In 1996, the gene locus for BSS was mapped to 16q12-13, and, in 2000, mutations in the cylindromatosis (CYLD) gene were determined to cause BSS, familial cylindromatosis (FC; OMIM 132700) and multiple familial trichoepithelioma type 1 (MFT1; OMIM 601606). The CYLD gene encodes an enzyme with deubiquitinase activity. To date, a total of 95 different diseases-causing mutations have been published for the CYLD gene. A summary of mutations identified in Hungarian patients and a review of previously published mutations are presented in this update. The majority of the sequence changes are frameshift (48%), nonsense (27%), missense (12%) and splice-site (11%) mutations; however, two in-frame deletions have also been reported. Most mutations are located in exons 9-20. Analysis of the identified CYLD gene mutations and the observed BSS, FC and MFT1 clinical phenotypes of the patients revealed significant genotype-phenotype correlations. Elucidation of these genotype-phenotype correlations is critical for the diagnosis of these rare monogenic skin diseases. In addition, characterizing these correlations may promote the understanding of their mechanisms and may hopefully contribute to the development of future therapeutic modalities.
authors.affiliation: Department of Medical Genetics, University of Szeged, Szeged, Hungary; Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary; Dermatological Research Group of the Hungarian Academy of Sciences, University of Szeged, Szeged, Hungary. Electronic address: nikoletta.nagy@gmail.com.
authors.forename: Nikoletta
authors.initials: N
authors.lastname: Nagy
authors.affiliation: Dermatological Research Group of the Hungarian Academy of Sciences, University of Szeged, Szeged, Hungary.
authors.forename: Katalin
authors.initials: K
authors.lastname: Farkas
authors.affiliation: Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary; Dermatological Research Group of the Hungarian Academy of Sciences, University of Szeged, Szeged, Hungary.
authors.forename: Lajos
authors.initials: L
authors.lastname: Kemény
authors.affiliation: Department of Medical Genetics, University of Szeged, Szeged, Hungary; Dermatological Research Group of the Hungarian Academy of Sciences, University of Szeged, Szeged, Hungary.
authors.forename: Márta
authors.initials: M
authors.lastname: Széll
mesh_terms: D000595:Amino Acid Sequence; D018389:Codon, Nonsense; D017124:Conserved Sequence; D000074749:Deubiquitinating Enzyme CYLD; D016368:Frameshift Mutation; D056726:Genetic Association Studies; D006801:Humans; D008969:Molecular Sequence Data; D020125:Mutation, Missense; D009386:Neoplastic Syndromes, Hereditary / Q000235:genetics*; D010375:Pedigree; D012878:Skin Neoplasms / Q000235:genetics*; D025521:Tumor Suppressor Proteins / Q000737:chemistry / Q000235:genetics*
chemical_list: D018389:Codon, Nonsense; D025521:Tumor Suppressor Proteins; C409984:CYLD protein, human; D000074749:Deubiquitinating Enzyme CYLD
keywords: Brooke-Spiegler syndrome; Cylindromatosis gene; Familial cylindromatosis; Familial trichoepitheliomatosis; Mutation update