Open AccessStudy of molecular basis of thyroid dysgenesis
Author(s) -
Nina Makretskaya,
Макрецкая Нина Алексеевна,
О. Б. Безлепкина,
Безлепкина Ольга Борисовна,
А. А. Колодкина,
Колодкина Анна Александровна,
A V Kiyaev,
Кияев Алексей Васильевич,
Evgeny Vasilyev,
Васильев Евгений Витальевич,
В. М. Петров,
Петров Василий Михайлович,
Olga Chikulaeva,
Чикулаева Ольга Александровна,
Oleg Malievsky,
Малиевский Олег Артурович,
Ivan I. Dedov,
Дедов Иван Иванович,
A. N. Tyulpakov,
Тюльпаков Анатолий Николаевич
Publication year - 2018
Publication title -
kliničeskaâ i èksperimentalʹnaâ tireoidologiâ
Language(s) - English
Resource type - Journals
eISSN - 2310-3787
pISSN - 1995-5472
DOI - 10.14341/ket9556
Subject(s) - pax8 , congenital hypothyroidism , dysgenesis , thyroid , medicine , endocrinology , gene , pediatrics , bioinformatics , genetics , biology , anatomy , transcription factor
Congenital hypothyroidism is a heterogeneous group of diseases, which is manifested by loss of function of the thyroid gland that affects infants from birth. 80–85% of cases are due to different types of thyroid dysgenesis. 5 genes have been described that are involved in the pathogenesis of thyroid dysgenesis: TSHR, PAX8, FOXE1, NKX2-1, NKX2-5.
Aims. To evaluate the prevalence of mutations in the genes TSHR, PAX8, FOXE1, NKX2-1, NKX2-5 among patients with severe congenital hypothyroidism.
Materials and methods. 161 patients (64 boys, 97 girls) with congenital hypothyroidism (TSH levels at neonatal screening or retesting greater than 90 mU/l) were included in the study. 138 subjects had different variants of thyroid dysgenesis, and 23 patients had normal volume of the gland. A next generation sequencing was used for molecular-genetic analysis. Sequencing was performed using PGM semiconductor sequencer (Ion Torrent, Life Technologies, USA) and a panel “Hypothyroidism” (Custom DNA Panel). Assessment of the pathogenicity of sequence variants were carried out according to the latest international guidelines (ACMG, 2015).
Results. 13 patients had variants in thyroid dysgenesis genes (8,1%, 13/161): TSHR, n = 6; NKX2-1, n = 3; NKX2-5, n = 1; PAX8, n = 3; FOXE1, n = 0.
Conclusions. Mutations in thyroid dysgenesis genes are a rare pathology. The majority of variants among our patients were identified in TSHR.