Genetic analysis of a child with Hypotrichosis simplex
10.3760/cma.j.cn511374-20230131-00043
- VernacularTitle:单纯性少毛症1例患儿的遗传学分析
- Author:
Yujuan ZHAI
1
;
Xiaohui LI
;
Wei WANG
;
Jinfa DOU
;
Jianbo WANG
;
Dongmei SHI
Author Information
1. 济宁市第一人民医院皮肤科，济宁 272002
- Keywords:
Genetic testing;
Hypotrichosis 14;
Genetic variant;
LSS gene
- From:
Chinese Journal of Medical Genetics
2024;41(3):351-355
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To explore the clinical phenotype and genetic characteristics of a child with Hypotrichosis 14.Methods:A child who had presented at the Henan Provincial People′s Hospital on May 4, 2020 due to hair thinning was selected as the study subject. Clinical data of the child was collected. Peripheral venous blood samples were collected from the child and her parents. Genomic DNA was extracted and subjected to whole exome sequencing. Candidate variants were validated by Sanger sequencing and bioinformatic analysis.Results:The child, a 5-year-old female, had presented with thin, soft lanugo-like hair which was easy to fall off. The child was found to harbor compound heterozygous missense variants of the LSS gene, namely c. 1609G>A (p.V537M) in exon 17 and c. 802T>G (p.F268V) in exon 8, which were respectively inherited from her father and mother. Both variant sites were highly conserved, though based on the guidelines from the American College of Medical Genetics and Genomics (ACMG), both variants were rated as variants of unknown significance (PM2_Supporting+ PP3+ PP4). Conclusion:The c. 1609G>A (p.V537M) and c. 802T>G (p.F268V) compound heterozygous variants of the LSS gene probably underlay the clinical phenotype in this patient.
