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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...

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 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...

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...

Functions of Thyroid Hormones

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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

Updated: May 17, 2026

Phosphorus-31 Magnetic Resonance Spectroscopy: A Tool for Measuring In Vivo Mitochondrial Oxidative Phosphorylation Capacity in Human Skeletal Muscle

Phosphorus-31 Magnetic Resonance Spectroscopy: A Tool for Measuring In Vivo Mitochondrial Oxidative Phosphorylation Capacity in Human Skeletal Muscle

Published on: January 19, 2017

Thyroid function and the metabolic syndrome in older persons: a population-based study.

Nathalie E Heima¹, E Marelise W Eekhoff, Mirjam M Oosterwerff

¹Department of Internal Medicine, VU UniversityMedical Center, Amsterdam, The Netherlands.

European Journal of Endocrinology

|October 25, 2012

Summary

Older adults with higher thyroid-stimulating hormone (TSH) levels show a greater prevalence of metabolic syndrome. This finding highlights a potential link between thyroid function and metabolic health in aging populations.

Related Experiment Videos

Last Updated: May 17, 2026

Phosphorus-31 Magnetic Resonance Spectroscopy: A Tool for Measuring In Vivo Mitochondrial Oxidative Phosphorylation Capacity in Human Skeletal Muscle

Phosphorus-31 Magnetic Resonance Spectroscopy: A Tool for Measuring In Vivo Mitochondrial Oxidative Phosphorylation Capacity in Human Skeletal Muscle

Published on: January 19, 2017

Area of Science:

Endocrinology
Gerontology
Metabolic Health

Background:

Growing evidence suggests a link between elevated thyroid-stimulating hormone (TSH) and metabolic syndrome components.
However, research specifically in the older adult population remains limited.

Purpose of the Study:

To investigate the association between serum TSH levels and the prevalence of metabolic syndrome.
This study focused on a representative sample of older individuals in The Netherlands.

Main Methods:

Utilized data from the Longitudinal Aging Study Amsterdam, a cohort study of Dutch older persons.
Assessed metabolic syndrome (using the US National Cholesterol Education Program definition) and its components, alongside serum TSH levels.
Included 1187 participants aged 65-88 years (590 men, 597 women).

Main Results:

The prevalence of metabolic syndrome was 34.2% among participants.
Individuals in the upper quartile of serum TSH (above 2.28 mU/l) exhibited a significantly increased prevalence of metabolic syndrome (OR=1.68).
This association remained significant after adjusting for confounders like age, sex, and lifestyle factors (OR=1.62).

Conclusions:

Higher serum TSH levels (upper quartile) are associated with a greater prevalence of metabolic syndrome in older adults.
The findings suggest a notable relationship between thyroid function and metabolic health in this demographic.