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Graves' Disease I: Introduction

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: Pathophysiology

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: Pathophysiology

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: Pathophysiology

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 Hormones

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: Introduction

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: May 16, 2026

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model

Published on: March 17, 2023

[Genetics of thyroid diseases].

Akira Hishinuma¹

¹Department of Infection Control, Clinical Laboratory Medicine, Dokkyo Medical University.

Nihon Rinsho. Japanese Journal of Clinical Medicine

|December 11, 2012

Summary

Recent genetic analysis reveals new insights into thyroid diseases. Genome-wide studies link specific gene variations to Graves

Area of Science:

Genetics and Molecular Biology
Endocrinology
Genomic Medicine

Context:

Thyroid diseases encompass a range of conditions affecting thyroid function and structure.
Genetic factors play a significant role in the etiology of various thyroid disorders.
Advances in genomic technologies are revolutionizing the understanding of disease pathogenesis.

Purpose:

To review recent advancements in the genetic analysis of thyroid diseases.
To highlight key findings from genome-wide association studies (GWAS) and gene-specific analyses.
To discuss the genetic underpinnings of Graves' disease, thyroid dysgenesis, and dyshormonogenesis.

Summary:

Genome-wide association studies have identified nine single nucleotide polymorphisms in six genes associated with Graves' disease, necessitating further functional validation.

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

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Last Updated: May 16, 2026

Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model

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

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Thyroid dysgenesis is frequently linked to mutations in thyroid transcription factors, with PAX8 being a primary cause.

Six genes within the thyroid hormone synthesis pathway explain approximately 80% of thyroid dyshormonogenesis cases.

Founder effects of specific mutations in NIS, thyroglobulin, PDS, and TSHR genes are increasingly recognized in the Japanese population.

Whole genome sequencing promises to uncover novel genes contributing to previously unidentified thyroid disease phenotypes.

Impact:

Provides a comprehensive overview of the current genetic landscape of thyroid diseases.
Identifies specific genetic variants and mutations associated with increased disease risk and specific phenotypes.
Lays the groundwork for future research into functional mechanisms and potential therapeutic targets.
Emphasizes the role of advanced sequencing technologies in discovering new genetic contributors to thyroid disorders.