BACKGROUND: Mutations in six genes have been identified in autosomal recessive congenital ichthyosis (ARCI). To date, few studies have analysed the spectrum of these mutations in specific populations. OBJECTIVES: We have studied the characteristics of patients with ARCI in Galicia (NW Spain). Methods We recruited patients by contacting all dermatology departments of Galicia and the Spanish patient organization for ichthyosis. TGM1, ALOX12B, ALOXE3, NIPAL4 and CYP4F22 were analysed in the patients and their relatives. RESULTS: We identified 23 patients with ARCI and estimated a prevalence of 1 : 122 000. Twenty of the patients were studied. Seventeen of them were clinically categorized as having lamellar ichthyosis (LI) and three as having congenital ichthyosiform erythroderma (CIE). TGM1 and ALOXE3 mutations were identified in 12/16 (75%) probands whereas no ALOX12B, NIPAL4 and CYP4F22 mutations were found. TGM1 mutations were found in 11/13 (85%) of LI probands. ALOXE3 mutations were identified in a single patient with CIE. Remarkably, mutations p.Arg760X, p.Asp408ValfsX21 and c.984+1G>A of TGM1 were present in six, four and two families, accounting for 41%, 23% and 14% of all TGM1 mutant alleles, respectively. CONCLUSIONS: The high percentage of patients with the same TGM1 mutations, together with the high number of homozygous probands (64%), indicates the existence of a strong founder effect in our population.
BACKGROUND: Mutations in six genes have been identified in autosomal recessive congenital ichthyosis (ARCI). To date, few studies have analysed the spectrum of these mutations in specific populations. OBJECTIVES: We have studied the characteristics of patients with ARCI in Galicia (NW Spain). Methods We recruited patients by contacting all dermatology departments of Galicia and the Spanish patient organization for ichthyosis. TGM1, ALOX12B, ALOXE3, NIPAL4 and CYP4F22 were analysed in the patients and their relatives. RESULTS: We identified 23 patients with ARCI and estimated a prevalence of 1 : 122 000. Twenty of the patients were studied. Seventeen of them were clinically categorized as having lamellar ichthyosis (LI) and three as having congenital ichthyosiform erythroderma (CIE). TGM1 and ALOXE3 mutations were identified in 12/16 (75%) probands whereas no ALOX12B, NIPAL4 and CYP4F22 mutations were found. TGM1 mutations were found in 11/13 (85%) of LI probands. ALOXE3 mutations were identified in a single patient with CIE. Remarkably, mutations p.Arg760X, p.Asp408ValfsX21 and c.984+1G>A of TGM1 were present in six, four and two families, accounting for 41%, 23% and 14% of all TGM1 mutant alleles, respectively. CONCLUSIONS: The high percentage of patients with the same TGM1 mutations, together with the high number of homozygous probands (64%), indicates the existence of a strong founder effect in our population.
Authors: Laura Fachal; Laura Rodríguez-Pazos; Manuel Ginarte; Jaime Toribio; Antonio Salas; Ana Vega Journal: PLoS One Date: 2012-04-12 Impact factor: 3.240
Authors: D Vaigundan; Neha V Kalmankar; J Krishnappa; N Yellappa Gowda; A V M Kutty; Patnam R Krishnaswamy Journal: Biomed Res Int Date: 2014-08-10 Impact factor: 3.411
Authors: Aisha Al-Naamani; Ahmed Al-Waily; Mohammed Al-Kindi; Maha Al-Awadi; Said Ali Al-Yahyaee Journal: Med Princ Pract Date: 2013-05-15 Impact factor: 1.927