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Related Concept Videos

Graves' Disease I: Introduction01:28

Graves' Disease I: Introduction

Graves' disease is an autoimmune disorder that causes hyperthyroidism, or overactivity of the thyroid gland. It results from autoantibodies called thyroid-stimulating immunoglobulins (TSIs), which bind to thyroid-stimulating hormone (TSH) receptors, leading to overstimulation of hormone production and a hypermetabolic state.EtiologyAlthough considered idiopathic, Graves’ disease has well-established contributing factors. There is a strong genetic component, with increased prevalence in...
Graves Disease II: Pathophysiology01:24

Graves Disease II: Pathophysiology

Graves’ disease is an autoimmune disorder characterized by the production of thyroid-stimulating immunoglobulins (TSI) that activate TSH receptors, leading to excessive synthesis and release of thyroid hormones (T3 and T4) and resulting in hyperthyroidism.Among all causes of hyperthyroidism, Graves’ disease is the most common and can happen at any age, though it is more frequent in women. It produces a hypermetabolic state with features such as weight loss, tachycardia, tremor, and heat...
Hypothyroidism II: Pathophysiology01:23

Hypothyroidism II: Pathophysiology

Hypothyroidism is a disorder characterized by insufficient production of thyroid hormones, which regulate metabolism, energy balance, and multiple organ systems.TypesHypothyroidism is classified based on the level of dysfunction. Primary hypothyroidism results from intrinsic thyroid gland dysfunction, causing reduced hormone production despite normal or increased stimulation. Secondary hypothyroidism arises from inadequate thyroid-stimulating hormone (TSH) secretion by the pituitary. Tertiary...
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...
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...
Hyperthyroidism I: Introduction01:25

Hyperthyroidism I: Introduction

Hyperthyroidism is a type of thyrotoxicosis characterized by the thyroid gland's overproduction of the thyroid hormones triiodothyronine (T3) and thyroxine (T4). This hormone excess increases the basal metabolic rate and enhances sensitivity to catecholamines.DiagnosisDiagnosis is based on clinical features and biochemical testing. It typically shows suppressed thyroid-stimulating hormone (TSH) levels below 0.4 mIU/L, with elevated free T3 and/or T4. Additional tests, including thyroid...

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Related Experiment Video

Updated: Jun 22, 2026

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
04:39

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model

Published on: March 17, 2023

Autoimmune thyroid disease: unlocking a complex puzzle.

Rosalind S Brown1

  • 1Children's Hospital Boston and Harvard University, Boston, Massachusetts 02115, USA. Rosalind.Brown@childrens.harvard.edu

Current Opinion in Pediatrics
|May 29, 2009
PubMed
Summary
This summary is machine-generated.

Molecular biology advances reveal key genetic factors and immune pathways in childhood autoimmune thyroid diseases (AITD), including Graves' disease and chronic lymphocytic thyroiditis. These insights improve diagnostics and may lead to targeted immune therapies.

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Related Experiment Videos

Last Updated: Jun 22, 2026

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
04:39

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model

Published on: March 17, 2023

Synchronous Triplanar Reconstruction Integrated with Color Doppler Mapping for Precise and Rapid Localization of Thyroid Lesions
05:41

Synchronous Triplanar Reconstruction Integrated with Color Doppler Mapping for Precise and Rapid Localization of Thyroid Lesions

Published on: February 9, 2024

Area of Science:

  • Endocrinology
  • Immunology
  • Genetics

Background:

  • Autoimmune thyroid diseases (AITD), such as Graves' disease and chronic lymphocytic thyroiditis (CLT), are common endocrine conditions in pediatric populations.
  • Molecular biology has significantly enhanced our understanding of the genetic susceptibility and immune pathophysiology underlying AITD.

Purpose of the Study:

  • To review recent advances in identifying susceptibility genes for AITD.
  • To explore the complex immune pathophysiology of these conditions.
  • To discuss the implications for diagnostics and future therapies.

Main Methods:

  • Analysis of genetic associations, including human leukocyte antigen (HLA) and non-HLA genes.
  • Investigation of specific epitopes recognized by autoantibodies.
  • Utilizing recombinant antigens and monoclonal antibodies.

Main Results:

  • Susceptibility genes are categorized into general immune response and thyroid-specific antigen groups.
  • New insights into HLA associations for CLT and Graves' disease, including specific amino acid signatures and thyroglobulin/HLA-DR polymorphisms.
  • Characterization of TSH receptor antibody binding to specific epitopes.

Conclusions:

  • Molecular tools have elucidated the genetic basis and pathophysiology of AITD.
  • These advancements have led to improved diagnostic tools.
  • Future developments are expected to enable more specific immune therapies for AITD.