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Published in: Endocrine 1/2017

01-07-2017 | Original Article

The relationship of 19 functional polymorphisms in iodothyronine deiodinase and psychological well-being in hypothyroid patients

Authors: Yoon Young Cho, Hye Jeong Kim, Hye Won Jang, Tae Hyuk Kim, Chang-Seok Ki, Sun Wook Kim, Jae Hoon Chung

Published in: Endocrine | Issue 1/2017

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Abstract

Purpose

Levothyroxine supplementation is insufficient for the management of one tenth of patients with hypothyroidism. Iodothyronine deiodinases have been suggested to play a role in residual hypothyroid symptoms of these patients by controlling local thyroid hormone homeostasis. Previous research has suggested a relationship between commonly inherited variations in type 2 iodothyronine deiodinase and impaired well-being. We evaluated the prevalence of iodothyronine deiodinase genotypes and their association with psychological well-being in the Korean hypothyroid population.

Methods

A prospective observational study. We enrolled 196 hypothyroid subjects (136 chronic autoimmune thyroiditis and 60 thyroid cancer) and assessed baseline well-being using six validated questionnaires. Genotyping was conducted for 19 single nucleotide polymorphisms in type 1, 2, and 3 iodothyronine deiodinase using Sequenom MassARRAY matrix-assisted laser desorption/ionization time-of-flight mass spectrometry in all patients.

Results

Frequencies of iodothyronine deiodinase genotypes and well-being scores were not different in hypothyroid subjects according to their disease types. Minor genotypes of a few iodothyronine deiodinase 1 variants (rs11206244, rs2294512, and rs4926616) were associated with reduced psychological well-being. However, iodothyronine deiodinase 2 and 3 variants had no effect on baseline well-being.

Conclusion

Minor variations in iodothyronine deiodinase 1 were associated with decreased well-being in the Korean hypothyroid population, whereas iodothyronine deiodinase 2 and 3 were not. Due to controversial results among different ethnicities, further studies to clarify the effects of iodothyronine deiodinase polymorphisms on psychological well-being are warranted in hypothyroid individuals.
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Metadata
Title
The relationship of 19 functional polymorphisms in iodothyronine deiodinase and psychological well-being in hypothyroid patients
Authors
Yoon Young Cho
Hye Jeong Kim
Hye Won Jang
Tae Hyuk Kim
Chang-Seok Ki
Sun Wook Kim
Jae Hoon Chung
Publication date
01-07-2017
Publisher
Springer US
Published in
Endocrine / Issue 1/2017
Print ISSN: 1355-008X
Electronic ISSN: 1559-0100
DOI
https://doi.org/10.1007/s12020-017-1307-4

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