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  11. Large-scale Screening And Functional Study Of Duoxa2 Variant In 599 Chinese Patients With Congenital Hypothyroidism

Large-scale screening and functional study of DUOXA2 variant in 599 Chinese patients with congenital hypothyroidism

Hai-Yang Zhang1,2, Cao-Xu Zhang3, Feng-Yao Wu1

  • 1The Core Laboratory in Medical Center of Clinical Research, Department of Molecular Diagnostics and Endocrinology, Shanghai Ninth People's Hospital, State Key Laboratory of Medical Genomics, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China.

European Journal of Endocrinology
|June 13, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Genetic variants in the DUOXA2 gene were identified in Chinese congenital hypothyroidism (CH) patients, with many impacting DUOX2 enzyme function. This expands understanding of CH causes and phenotypes.

Area of Science:

  • Genetics
  • Endocrinology
  • Molecular Biology

Background:

  • Dual oxidase maturation factor 2 (DUOXA2) is crucial for functional dual oxidase 2 (DUOX2) maturation and localization.
  • DUOXA2 is a significant candidate gene for congenital hypothyroidism (CH).

Purpose of the Study:

  • To identify DUOXA2 gene variants in Chinese CH patients.
  • To analyze the functional impact of identified DUOXA2 variants.
  • To explore the genotype-phenotype relationship in CH associated with DUOXA2 mutations.

Main Methods:

  • Targeted next-generation sequencing and whole exome sequencing were used to screen DUOXA2 variants in 599 CH patients.
  • Clinical data were collected for statistical analysis.
  • In vitro studies were conducted to assess the biological function of DUOXA2 variants.
Keywords:
congenital hypothyroidismdual oxidase 2dual oxidase maturation factor 2genotype-phenotype analysis

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Main Results:

  • Thirteen DUOXA2 variants, including six novel ones, were found in 6.7% of patients.
  • Ten variants impaired DUOX2 enzyme activity, reducing hydrogen peroxide production.
  • Oligogenic mutation patterns in the DUOX system were common; DUOXA2 mutations correlated with milder CH phenotypes and normal thyroid size.

Conclusions:

  • The study expanded the known spectrum of DUOXA2 variants.
  • Functional studies and pedigree analysis enhance genetic counseling accuracy for CH.
  • The identified genotype-phenotype correlations broaden the understanding of CH phenotypic variability.
variant