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Mutations of Dual Oxidase 2 (Duox2) Gene Among Patients With Permanent and Transient Congenital Hypothyroidism



Rostampour N1 ; Tajaddini MH2 ; Hashemipour M3 ; Salehi M4 ; Feizi A5 ; Haghjooy S6 ; Kelishadi R7
Authors
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Authors Affiliations
  1. 1. Department of Pediatrics, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
  2. 2. School of Pharmacy and Isfahan Pharmaceutical Sciences Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. Endocrine and Metabolism Research Center, Child Health Promotion Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
  4. 4. Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
  5. 5. Department of Epidemiology and Biostatics, School of Public Health, Isfahan University of Medical Sciences, Isfahan, Iran
  6. 6. Dept. of Physiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
  7. 7. Department of Pediatrics, Child Health Promotion Research Center, Isfahan University of Medical Sciences, Isfahan, Iran

Source: Pakistan Journal of Medical Sciences Published:2012

Abstract

Objective: The prevalence of congenital hypothyroidism (CH) is high in Isfahan, Iran. In addition, it has different etiologies compared with other countries. The rate of parental consanguinity is also high in the city. Moreover, DUOX2 gene is effective in transient CH and permanent CH due to dyshormonogenesis. Therefore, the aim of this research was to investigate the mutations of DUOX2 gene in patients with transient CH and permanent CH due to dyshormonogenesis. Methodology: In this descriptive, prospective study, patients diagnosed with transient and permanent CH due to dyshormonogenesis during CH screening program were selected. Venous blood samples were obtained to determine the 3 mutations (Q36H, R376W, and D506N) of DUOX2 gene using polymerase chain reaction (PCR) method by specific primers and complementary methods such as restriction fragment length polymorphism (RFLP) and singlestrand conformation polymorphism (SSCP). Results: In this study, 25 patients with transient CH and 33 subjects with permanent CH due to dyshormonogenesis were studied. In addition, 30 children were studied as the control group. We did not find any mutations of the 3 mentioned mutations of DUOX2 gene. Conclusion: Considering the findings of the current study, further studies with other methods are required to evaluate other gene mutations such as pendrin, sodium-iodide symporter (NIS) and thyroglobulin.
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