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Related Concept Videos

Synthesis and Regulation of Thyroid Hormones01:20

Synthesis and Regulation of Thyroid Hormones

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.
Upon reaching the thyroid gland, TSH stimulates the follicular cells' active uptake of iodide ions from the blood. The ions diffuse to the apical surface of the cells and are oxidized to iodine. The iodine is then...
General Transcription Factors01:30

General Transcription Factors

Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase01:11

Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase

Genetic polymorphisms in drug targets have emerged as critical determinants of interindividual variability in drug response and toxicity. Pharmacogenomic investigations increasingly focus on identifying these variations to personalize and optimize therapeutic interventions. A drug target may be a receptor, enzyme, or signaling protein involved in pharmacologic responses or disease-related pathways. While early pharmacogenetic studies focused primarily on drug metabolism, current research...
Functions of Thyroid Hormones01:18

Functions of Thyroid Hormones

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.
TH is indispensable for the normal development and maturation of the skeletal, muscular, and nervous systems during fetal and childhood growth. It facilitates bone mineral turnover and regulates protein synthesis in developing tissues, contributing significantly to overall growth and...
Hyperthyroidism II: Pathophysiology01:27

Hyperthyroidism II: Pathophysiology

Hyperthyroidism is a hypermetabolic state caused by elevated levels of thyroid hormones, triiodothyronine (T3) and thyroxine (T4). It results from dysregulation at the thyroid, pituitary, or immune system level and affects multiple organ systems.PathophysiologyThe most common cause of hyperthyroidism is Graves’ disease, an autoimmune disorder in which antibodies, specifically thyroid-stimulating antibodies (TSAb), a subtype of TSH receptor antibodies (TRAb), bind to and activate TSH receptors...
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The Thyroid Gland

The thyroid gland is a small, butterfly-shaped gland located in the neck and covers the anterior surface of the trachea. The gland has two lateral lobes connected by a thin tissue mass called the isthmus. Internally, each lobe comprises many small spherical structures known as thyroid follicles, surrounded by a network of blood vessels.
The follicles have a central cavity lined by simple cuboidal to squamous epithelial cells called follicular cells. These cells produce the glycoprotein...

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Related Experiment Video

Updated: Jul 5, 2026

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
04:39

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model

Published on: March 17, 2023

The thyroglobulin gene: evolutionary and regulatory issues.

D Christophe1, G Vassart

  • 1IRIBHN, Faculté de Médecine, Université Libre de Bruxelles, Bruxelles, Belgium.

Trends in Endocrinology and Metabolism: TEM
|September 1, 1990
PubMed
Summary
This summary is machine-generated.

Thyroglobulin gene transcription involves a complex unit with repetitive modules and an acetylcholinesterase homologue. Its regulation by cAMP utilizes unique pathways, distinct from other known systems.

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An Ex vivo Culture System to Study Thyroid Development
08:33

An Ex vivo Culture System to Study Thyroid Development

Published on: June 6, 2014

Related Experiment Videos

Last Updated: Jul 5, 2026

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
04:39

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model

Published on: March 17, 2023

An Ex vivo Culture System to Study Thyroid Development
08:33

An Ex vivo Culture System to Study Thyroid Development

Published on: June 6, 2014

Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Thyroglobulin (TG) synthesis is crucial for thyroid hormone production.
  • The TG gene structure is complex, featuring repetitive modules and homology to acetylcholinesterase.
  • Alternative splicing in gene transcription is a known phenomenon with varying functional significance.

Purpose of the Study:

  • To elucidate the structural organization of the thyroglobulin gene transcription unit.
  • To investigate the mechanisms controlling thyroglobulin gene transcription.
  • To identify the regulatory elements and factors involved in thyroglobulin gene expression.

Main Methods:

  • Bioinformatic analysis of the thyroglobulin gene sequence.
  • Identification and characterization of alternatively spliced transcripts.
  • Experimental investigation of cAMP-mediated transcriptional regulation.

Main Results:

  • The thyroglobulin gene is organized as a large transcription unit formed by repetitive modules and an ancient acetylcholinesterase homologue.
  • Common alternatively spliced transcripts were observed, but their functional role remains undetermined.
  • Thyroglobulin gene transcription is regulated by cyclic adenosine monophosphate (cAMP) via a novel pathway.

Conclusions:

  • The thyroglobulin gene possesses a unique structural and regulatory architecture.
  • Alternative splicing of thyroglobulin transcripts may represent biological noise or have an unknown function.
  • The cAMP-dependent regulatory pathway for thyroglobulin transcription differs from previously characterized systems, highlighting novel molecular mechanisms.