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Related Concept Videos

Synthesis and Regulation of Thyroid Hormones01:20

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Low blood levels of the thyroid hormones — triiodothyronine (T3) and thyroxine (T4) — signal the hypothalamus to release the thyrotropin-releasing hormone (TRH). TRH then reaches the pituitary gland and stimulates the release of thyroid-stimulating hormone(TSH) into the bloodstream.
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The thyroid hormone (TH) plays a pivotal role in the intricate orchestration of physiological processes, exerting profound effects on development, metabolism, and homeostasis throughout different life stages.
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Related Experiment Video

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An Ex vivo Culture System to Study Thyroid Development
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Whole-genome sequence-based analysis of thyroid function.

Peter N Taylor1, Eleonora Porcu2, Shelby Chew3

  • 1Thyroid Research Group, Institute of Molecular &Experimental Medicine, Cardiff University School of Medicine, Cardiff University, Cardiff, UK.

Nature Communications
|March 7, 2015
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Summary
This summary is machine-generated.

This study identifies new genetic variants influencing thyroid function, specifically thyrotropin (TSH) and free thyroxine (FT4) levels. These findings enhance our understanding of thyroid hormone regulation and its genetic basis.

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Area of Science:

  • Genetics
  • Endocrinology
  • Genomic Medicine

Background:

  • Normal thyroid function is crucial for overall health.
  • The genetic underpinnings of thyroid hormone regulation are not fully understood.
  • Thyrotropin (TSH) and free thyroxine (FT4) are key heritable thyroid traits.

Purpose of the Study:

  • To identify novel genetic variants associated with TSH and FT4 levels.
  • To analyze whole-genome sequence data for common and rare variants impacting thyroid function.
  • To improve the understanding of the genetic architecture of thyroid traits.

Main Methods:

  • Whole-genome sequence analysis of UK10K project data (N=2,287).
  • Meta-analysis of common variants (MAF≥1%) using additional WGS and imputed datasets (N=16,335).
  • Sequence kernel association testing (SKAT) for rare variants (MAF<1%).

Main Results:

  • Identified a novel TSH variant in SYN2 and a new independent variant in PDE8B.
  • Reported a low-frequency FT4 variant near B4GALT6/SLC25A52 tagging a rare TTR variant.
  • Discovered a novel association between rare variants in NRG1 and FT4.
  • Common variants collectively explain ≥20% of TSH and FT4 variance.

Conclusions:

  • Whole-genome sequencing studies with increased coverage reveal novel variants linked to thyroid function.
  • These findings contribute significantly to the genetic understanding of thyroid hormone regulation.
  • The identified variants offer new insights into the genetic basis of thyroid health.