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Related Concept Videos

The Thyroid Gland01:23

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...
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...
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...
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...
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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A Personalized 3D-Printed Model for Preoperative Evaluation in Thyroid Surgery
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A computational model of the human thyroid.

Mike Degon1, Stuart R Chipkin, C V Hollot

  • 1USUHS School of Medicine, Bethesda, MD 20814, USA.

Mathematical Biosciences
|February 23, 2008
PubMed
Summary

This study develops a computational thyroid model to understand hormonal regulation. The model captures key thyroid physiology and aids in evaluating hypotheses for Wolff-Chaikoff escape.

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Area of Science:

  • Endocrinology
  • Computational Biology
  • Physiology

Background:

  • The thyroid gland, part of the endocrine system, is crucial for growth and development.
  • Thyroid hormone biosynthesis depends on dietary iodine and is regulated by complex feedback mechanisms.
  • Understanding these regulatory mechanisms is vital for managing thyroid disorders.

Purpose of the Study:

  • To engineer a computational model of thyroid physiology using recent molecular and clinical data.
  • To analyze the model's ability to replicate known thyroid functions and hormonal regulation.
  • To investigate and evaluate competing hypotheses related to the Wolff-Chaikoff escape phenomenon.

Main Methods:

  • Development of a computational thyroid model integrating molecular and clinical observations.
  • Simulation and analysis of the model to assess its physiological accuracy.
  • Identification of key regulatory features within the model.
  • Application of the model to explore hypotheses concerning Wolff-Chaikoff escape.

Main Results:

  • The computational model successfully captures known aspects of thyroid physiology.
  • Specific model features responsible for hormonal regulation were identified.
  • The model provided a platform for evaluating competing hypotheses of Wolff-Chaikoff escape.

Conclusions:

  • The engineered computational thyroid model serves as a valuable tool for studying thyroid function.
  • The model elucidates mechanisms underlying thyroid hormonal regulation and iodine homeostasis.
  • This approach facilitates the investigation of complex thyroidal responses like Wolff-Chaikoff escape.