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Related Concept Videos

Autoimmune Disorders01:29

Autoimmune Disorders

Autoimmune diseases are a group of disorders in which the body's immune system mistakenly attacks its own cells, tissues, and organs. This results from an overactive immune response against substances and tissues normally present in the body. Let's delve into the concept and mechanism of autoimmune diseases from an immune system point of view, explore different causes and examples of such diseases, and discuss potential solutions.
Concept and Mechanism of Autoimmune Diseases
The immune system...
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...
Type I Diabetes I: Introduction01:12

Type I Diabetes I: Introduction

Type 1 diabetes mellitus is a chronic metabolic disorder characterized by an absolute deficiency of insulin resulting from the autoimmune destruction of pancreatic β-cells. Although it can occur at any age, it is most commonly diagnosed in childhood, adolescence, or early adulthood. The loss of insulin production impairs cellular glucose uptake, resulting in persistent hyperglycemia and necessitating lifelong insulin therapy.Autoimmune Destruction of β-CellsThe hallmark of type 1 diabetes is an...
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...
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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Related Experiment Video

Updated: Jun 12, 2026

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
04:39

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model

Published on: March 17, 2023

Environmental exposures and autoimmune thyroid disease.

Gregory A Brent1

  • 1Endocrinology and Diabetes Division, VA Greater Los Angeles Healthcare System, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, California 90073, USA. gbrent@ucla.edu

Thyroid : Official Journal of the American Thyroid Association
|June 29, 2010
PubMed
Summary

Environmental exposures can increase the risk of autoimmune thyroid disease. Identifying these triggers, alongside genetic factors, is key to reducing thyroid disease risk in susceptible individuals.

Related Experiment Videos

Last Updated: Jun 12, 2026

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
04:39

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model

Published on: March 17, 2023

Area of Science:

  • Environmental Medicine
  • Endocrinology
  • Toxicology

Background:

  • Environmental exposures, including perchlorate and polychlorinated biphenols, impact thyroid function.
  • While many agents lower thyroid hormone levels, some increase autoimmune thyroid disease (AITD) risk.

Purpose of the Study:

  • To review environmental factors contributing to autoimmune thyroid disease.
  • To understand how environmental exposures influence thyroid health and AITD development.

Main Methods:

  • Literature review of environmental exposures and their effects on thyroid function.
  • Analysis of factors increasing the risk of autoimmune thyroid disease.

Main Results:

  • Radiation exposure (nuclear fallout, medical), increased iodine intake, and environmental contaminants are linked to AITD.
  • Genetic background accounts for ~70% of AITD risk, with environmental triggers playing a role in susceptible individuals.

Conclusions:

  • Understanding environmental agents' association with thyroid dysfunction aids population risk reduction.
  • Identifying specific AITD triggers and mechanisms can inform individual patient risk reduction strategies.
  • These insights are particularly relevant for individuals with a family history of AITD.