Clinical Original Article
Analysis of DUOX2 mutations and inheritance pattern in Chinese patients with congenital hypothyroidism
Sun Feng, Zhang Junxiu, Yang Changyi, Song Keyi, Chen gang, Zhu Wenbin, Zhao Shuangxia, Wan Yueyue, Zhang Ruijia, Zhang Manman, Song Huaidong
Published 2017-07-25
Cite as Chin J Endocrinol Metab, 2017,33(07): 567-573. DOI: 10.3760/cma.j.issn.1000-6699.2017.07.006
Abstract
ObjectiveTo investigate the prevalence of DUOX2 mutations in Chinese patients with congenital hypothyroidism (CH) and to discuss the inheritance pattern of DUOX2 gene.
MethodsBlood samples were collected from 91 CH children and their genomic DNA was extracted from peripheral blood leukocytes. All exons and exon-intron boundaries of DUOX2 were analyzed by target next-generation sequencing and family trios was established to study the inheritance pattern of DUOX2 gene.
ResultsFifty-four out of 91 children with CH carried DUOX2 mutation, with a prevalence of 59.34%. Of the 54 CH children, 36 carried DUOX2 biallelic mutations. In all 12 family trios with probands carrying biallelic DUOX2 mutations, the parents carried heterozygous DUOX2 mutations while still showing normal thyroid function, suggesting that CH caused by DUOX2 mutations is inherited in an autosomal recessive manner.
ConclusionDUOX2 gene is one of the most frequently mutated genes in Chinese CH patients and its inheritance pattern is an autosomal recessive one. (Chin J Endocrinol Metab, 2017, 33: 567-573)
Key words:
Congenital hypothyroidism; Dualoxidase 2; Mutations; Recessive inheritance
Contributor Information
Sun Feng
Research Center for Clinical Medicine, Department of Endocrinology, Shanghai Ninth People′s Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, China
Zhang Junxiu
Yang Changyi
Song Keyi
Chen gang
Zhu Wenbin
Zhao Shuangxia
Wan Yueyue
Zhang Ruijia
Zhang Manman
Song Huaidong