Cited by 72Thyroid Disorders and TreatmentsGenomics and Rare DiseasesThyroid Cancer Diagnosis and Treatment

A clinician’s guide to understanding resistance to thyroid hormone due to receptor mutations in the TRα and TRβ isoforms

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Singh, Brijesh K., Yen, Paul M.·2017·Clinical Diabetes and Endocrinology

Abstract

There are two genes that express the major thyroid hormone receptor isoforms. Mutations in both these genes have given rise to Resistance to Thyroid Hormone (RTH) syndromes (RTHβ, RTHα) that can have variable phenotypes for mutations of the same receptor isoform as well as between the two receptor isoforms. In general, the relative tissue-specific distribution of TRβ and TRα determine RTH in different tissues for each form of RTH. These differences highlight some of the isoform-specific roles of each TR isoform. The diagnosis of RTH is challenging for the clinician but should be considered whenever a patient presents with unexplained elevated serum free T 4 (fT 4 ) and unsuppressed TSH levels, as well as decreased serum free T 4 /T 3 ratio. Here we provide a guide for the clinician to diagnose and treat both types of RTH.

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  • Type B thyroid hormone resistance has a familial component in 80% to 90% of cases.

    “particularly due to the fact that a considerable proportion, ranging from 80% to 90%, of type B THR cases exhibit a familial component.87”
  • Loss-of-function mutations in THRs produce elevated circulating T4 and T3 levels simultaneously with signs of a functional peripheral hypothyroidism.

    “Loss-offunction mutations in THRs have been shown to produce elevated circulating T4 and T3 levels simultaneously with signs of a functional peripheral hypothyroidism”

    From Pharmacodynamic and Therapeutic Actions of Levothyroxine (2021) · cites this paper as [17]

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Authors
Singh, B. K., & Yen, P. M.
Affiliations
National University of Singapore (SG)
Corresponding author
Yen, Paul M.
Venue
Clinical Diabetes and Endocrinology
Published
2017-09-15
Volume
3
Issue
1
Pages
8-8
ISSN
2055-8260 (ISSN-L)
OpenAlex
W2755471567
Cited by
72
References
56
Citations by year
2026: 8 · 2025: 13 · 2024: 9 · 2023: 13 · 2022: 6 · 2021: 8 · 2020: 5 · 2019: 6 · 2018: 3
FWCI
3.02
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Clinical Diabetes and Endocrinology (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Medical Research Council (CSA 0054/2013, CIRG 16May028)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Thyroid Disorders and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomics and Rare Diseases
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Thyroid Cancer Diagnosis and Treatment
Keywords
thyroid hormone resistance, TRα, thyroid hormone receptor beta

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