Mutation Analysis of the CYP4F22 Gene in a Family with Autosomal Recessive Congenital Ichthyosis

Abstract

Autosomal recessive congenital ichthyosis (ARCI) is a rare hereditary cornification disorder presented with abnormal skin scaling. In this paper, we used next-generation sequencing to determine the variants in a Chinese ARCI patient. We used sanger sequencing to verify bidirectionally the DNA from the proband and her parents. Results showes that two compound heterozygous variants (c.235G > T and c.641delG) in CYP4F22 gene, and both of the mutations are novel. The parents were heterozygous carriers. The two variants are classified as pathogenic variants based on interpretation guidelines. The compound heterozygous mutations in CYP4F22 gene were the causative mutations responsible for ARCI in proband.

Keywords

• autosomal recessive congenital ichthyosis
• cyp4f22 gene
• next-generation sequencing
• pathogenic variant
• genotype-phenotype