17 beta-hydroxysteroid dehydrogenase 3 deficiency due to novel compound heterozygous variants of HSD17B3 gene in a sib pair.
10.3760/cma.j.cn511374-20200527-00392
- Author:
Su WU
1
;
Bixia ZHENG
;
Ting LIU
;
Ziyang ZHU
;
Wei GU
;
Qianqi LIU
Author Information
1. Department of Endocrinology, Children's Hospital Affiliated to Nanjing Medical University, Nanjing, Jiangsu 210008, China. 18951769617@163.com.
- Publication Type:Journal Article
- MeSH:
17-Hydroxysteroid Dehydrogenases/genetics*;
Female;
Genetic Testing;
Genomics;
Humans;
Mutation;
Mutation, Missense
- From:
Chinese Journal of Medical Genetics
2021;38(8):787-790
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVE:To explore the genetic basis for a sib pair featuring 17beta-hydroxysteroid dehydrogenase type 3 deficiency.
METHODS:Genomic DNA was extracted from the proband, her sister, and their parents, and was subjected to sequencing analysis with a gene panel for sexual development. Suspected variant was verified by Sanger sequencing and bioinformatic analysis.
RESULTS:Both the proband and her sister were found to harbor novel compound heterozygous missense variants of the HSD17B3 gene, namely c.839T>C (p.Leu280Pro) and c.239G>T (p.Arg80Leu), which were derived respectively from their mother and father. The variants were unreported previously and predicted to be deleterious by PolyPhen2, MutationTaster and other online software. Based on the American College of Medical Genetics and Genomics standards and guidelines, both c.839T>C(p.Leu280Pro) and c.239G>T (p.Arg80Leu) were predicted to be likely pathogenic (PM2+PP1+PP2+PP3+PP4, PM2+PM5+PP1+PP2+PP3+PP4).
CONCLUSION:The compound heterogeneous variants of the HSD17B3 gene probably underlay the disease in this sib pair. 17beta-hydroxysteroid dehydrogenase type 3 deficiency may lack specific clinical features and laboratory index, genetic testing can facilitate a definitive diagnosis.
