Identification and consequences of polymorphisms in the thyroid hormone receptor alpha and beta genes

Helena Gásdal Sørensen, Wendy M van der Deure, Pia Skov Hansen, Robin P Peeters, Monique M B Breteler, Kirsten Ohm Kyvik, Thorkild I A Sørensen, Laszlo Hegedüs, Theo J Visser

    31 Citations (Scopus)

    Abstract

    OBJECTIVE: Genetic factors exert considerable influence on thyroid function variables. Single nucleotide polymorphisms (SNPs) in thyroid hormone pathway genes have been associated with serum thyroid parameters implying small alterations in the hypothalamus-pituitary-thyroid axis. However, little is known about SNPs in the THRA (17q11.2) and THRB (3p24.2) genes. The aim of this study was to map THRA and THRB for the occurrence and frequencies of SNPs and relate these to thyroid parameters.

    DESIGN AND METHODS: SNPs were identified by sequencing all THRA and THRB exons and flanking regions in 52 randomly selected subjects. SNPs were genotyped in 1116 healthy Danish twins by TaqMan assays and related to thyroid parameters. One SNP in THRB was additionally genotyped in the elderly population of the Rotterdam Scan Study (n = 940).

    MAIN OUTCOME: 15 SNPs (7 novel) in THRA and THRB were identified. Two SNPs in the 3' untranslated region of THRA were genotyped: a novel SNP (2390A/G) and 1895C/A (rs12939700). In THRB, a synonymous (735C/T; rs3752874) and an intronic SNP (in9-G/A; rs13063628) were genotyped. No associations between SNPs and thyroid hormone levels (total and free 3,3',5-triiodo-L-thyronine [T3] and thyroxine, reverse T3) were found. THRB-in9-G/A was significantly associated with higher serum thyroid stimulating hormone (TSH) (p(lnTSH) = 0.01) in the Danish twins, but not in subjects of the Rotterdam Scan Study, although it showed a similar trend.

    CONCLUSIONS: Analysis of the T3 receptor genes revealed 15 SNPs, including 7 novel. Only THRB-in9-G/A was associated with higher serum TSH in a large population of Danish twins.

    Original languageEnglish
    JournalThyroid : official journal of the American Thyroid Association
    Volume18
    Issue number10
    Pages (from-to)1087-94
    Number of pages8
    ISSN1050-7256
    DOIs
    Publication statusPublished - Oct 2008

    Keywords

    • Adult
    • Aged
    • Denmark
    • Female
    • Humans
    • Male
    • Netherlands
    • Polymorphism, Single Nucleotide
    • Thyroid Hormone Receptors alpha
    • Thyroid Hormone Receptors beta
    • Thyroid Hormones
    • Thyrotropin

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