Screening of frequent variants associated with congenital hypothyroidism: a comparison with next generation sequencing
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- Watanabe Daisuke
- Department of Pediatrics, Faculty of Medicine, University of Yamanashi, Yamanashi 409-3898, Japan
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- Yagasaki Hideaki
- Department of Pediatrics, Faculty of Medicine, University of Yamanashi, Yamanashi 409-3898, Japan
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- Narusawa Hiromune
- Department of Pediatrics, Faculty of Medicine, University of Yamanashi, Yamanashi 409-3898, Japan
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- Saito Tomohiro
- Department of Pediatrics, Faculty of Medicine, University of Yamanashi, Yamanashi 409-3898, Japan
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- Mitsui Yumiko
- Department of Pediatrics, Faculty of Medicine, University of Yamanashi, Yamanashi 409-3898, Japan
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- Miyake Kunio
- Department of Health Sciences, Faculty of Medicine, University of Yamanashi, Yamanashi 409-3898, Japan
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- Ohta Masanori
- Department of Pediatrics, Faculty of Medicine, University of Yamanashi, Yamanashi 409-3898, Japan
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- Inukai Takeshi
- Department of Pediatrics, Faculty of Medicine, University of Yamanashi, Yamanashi 409-3898, Japan
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Abstract
<p>Congenital hypothyroidism (CH) is considered the most common congenital endocrine disorder of genetic origin. Next generation sequencing (NGS) is the standard method for identifying genetic mutations, but it is an expensive and complex technique. Therefore, we propose to use Sanger sequencing to identify selected variants of the four most common CH-causative genes: DUOX2, TG, TSHR, and PAX8. To analyze the performance of Sanger sequencing, we compared its variant detection ability with that of a CH NGS panel containing 53 genes. We performed Sanger sequencing of selected variants and panel NGS analysis of 25 Japanese patients with CH. Sanger sequencing identified nine variants in seven patients, while NGS identified 24 variants in 14 patients. Of these, eight, five, eight, two, and one were found to be potentially pathogenic in DUOX2, TSHR, TG, UBR1, and TPO genes, respectively. The percentage of detectable variants using Sanger sequencing compared with NGS was 37.5% (9/24 variants), whereas the percentage of detectable cases carrying variants using Sanger sequencing compared with NGS was 50% (7/14 patients). We proposed a system for screening commonly identified CH-related variants by Sanger sequencing. Sanger sequencing could therefore identify about a third of CH-causative variants, so is considered an effective and efficient form of pre-screening before NGS.</p>
Journal
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- Endocrine Journal
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Endocrine Journal 68 (12), 1411-1419, 2021
The Japan Endocrine Society
