John Libbey Eurotext

European Journal of Dermatology

Non-bullous congentital ichthyosiform erythroderma associated with homozygosity for a novel missense mutation in an ATP binding domain of ABCA12 Volume 22, issue 2, March-April 2012

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Authors
Human Molecular Genetics Laboratory, National Institute for Biotechnology and Genetic Engineering (NIBGE), Faisalabad, Pakistan, Department of Immunology, Genetics and Pathology, Uppsala University, 752 85 Uppsala, Sweden
  • Key words: ABCA12, ARCI, Ichthyosis, NCIE
  • DOI : 10.1684/ejd.2011.1638
  • Page(s) : 178-81
  • Published in: 2012

A Mutations in the gene encoding the ABCA12 protein are associated with different subtypes of autosomal recessive congenital ichthyosis (ARCI), including Harlequin ichthyosis (HI), lamellar ichthyosis (LI) and non-bullous congenital ichthyosiform erythroderma (NCIE). Disruption of ABCA12 lead to perturbed lipid transport in lamellar granules and a defective intercellular lipid layer of the stratum corneum. We have identified a large consanguineous Pakistani family affected by NCIE. Autozygosity mapping showed that affected individuals are homozygous for the ABCA12 gene region. Subsequent mutation screening revealed a homozygous c.4676G>T transition in all five affected family members. The mutation results in a novel p.G1559V substitution within the first nucleotide binding domain of ABCA12. The combined results support that an ABCA12 missense mutation, despite its location in a functional domain, may be associated with a mild ichthyosis phenotype. Furthermore, our findings increase the mutational spectrum in ABCA12 associated with ARCI of diagnostic and prognostic importance.