Helmholtz Gemeinschaft

Search
Browse
Statistics
Feeds

Unknown mutations and genotype/phenotype correlations of autosomal recessive congenital ichthyosis in patients from Saudi Arabia and Pakistan

[thumbnail of Original Article]
Preview
PDF (Original Article) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
1MB
[thumbnail of Supporting Information] Other (Supporting Information)
130kB

Item Type:Article
Title:Unknown mutations and genotype/phenotype correlations of autosomal recessive congenital ichthyosis in patients from Saudi Arabia and Pakistan
Creators Name:Lima Cunha, D., Alakloby, O.M., Gruber, R., Kakar, N., Ahmad, J., Alawbathani, S., Plank, R., Eckl, K., Krabichler, B., Altmüller, J., Nürnberg, P., Zschocke, J., Borck, G., Schmuth, M., Alabdulkareem, A.S., Abdulaziz Alnutaifi, K. and Hennies, H.C.
Abstract:BACKGROUND: Autosomal recessive congenital ichthyosis (ARCI) is a genetically and phenotypically heterogeneous skin disease, associated with defects in the skin permeability barrier. Several but not all genes with underlying mutations have been identified, but a clear correlation between genetic causes and clinical picture has not been described to date. METHODS: Our study included 19 families from Saudi Arabia, Yemen, and Pakistan. All patients were born to consanguineous parents and diagnosed with ARCI. Mutations were analyzed by homozygosity mapping and direct sequencing. RESULTS: We have detected mutations in all families in five different genes: TGM1, ABCA12, CYP4F22, NIPAL4, and ALOXE3. Five likely pathogenic variants were unknown so far, a splice site and a missense variant in TGM1, a splice site variant in NIPAL4, and missense variants in ABCA12 and CYP4F22. We attributed TGM1 and ABCA12 mutations to the most severe forms of lamellar and erythematous ichthyoses, respectively, regardless of treatment. Other mutations highlighted the presence of a phenotypic spectrum in ARCI. CONCLUSION: Our results contribute to expanding the mutational spectrum of ARCI and revealed new insights into genotype/phenotype correlations. The findings are instrumental for a faster and more precise diagnosis, a better understanding of the pathophysiology, and the definition of targets for more specific therapies for ARCI.
Keywords:Congenital Ichthyosis, Erythema, Genotype/Phenotype Correlation, Homozygosity Mapping, Skin, Permeability Barrier, Skin Scaling
Source:Molecular Genetics & Genomic Medicine
ISSN:2324-9269
Publisher:Wiley
Volume:7
Number:3
Page Range:e539
Date:March 2019
Official Publication:https://doi.org/10.1002/mgg3.539
PubMed:View item in PubMed

Repository Staff Only: item control page

Downloads

Downloads per month over past year

Open Access
MDC Library