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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...
The Parathyroid Glands00:59

The Parathyroid Glands

The two pairs of parathyroid glands embedded within the posterior surface of the thyroid gland are restricted by a dense capsule around them. These glands comprise two distinct cell populations—parathyroid oxyphil and parathyroid principal cells- pivotal in calcium homeostasis.
Oxyphil cells, whose functions remain elusive, emerge during late puberty, adding a layer of complexity to the parathyroid gland's intricacies. In contrast, principal parathyroid cells undertake a vital role by producing...
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...
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...
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...

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Related Experiment Video

Updated: May 26, 2026

An Ex vivo Culture System to Study Thyroid Development
08:33

An Ex vivo Culture System to Study Thyroid Development

Published on: June 6, 2014

The thyroid lobes: the different twins.

E Albi1, F Curcio, R Spelat

  • 1Department of Clinical and Experimental Medicine, Physiopathology Section, University of Perugia, Perugia, Italy. ealbi@unipg.it

Archives of Biochemistry and Biophysics
|December 20, 2011
PubMed
Summary
This summary is machine-generated.

The right thyroid lobe shows higher activity and sensitivity than the left, with distinct molecular signaling pathways. These structural and functional differences may explain its increased susceptibility to thyroid disease.

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Area of Science:

  • Endocrinology
  • Cell Biology
  • Histology

Background:

  • While right and left thyroid lobe sizes are known, their distinct morphology, follicle structure, and molecular signaling remain unexplored.
  • Previous research has not detailed functional differences between the thyroid's right and left lobes.

Purpose of the Study:

  • To investigate and compare the morpho-functional characteristics of the right and left thyroid lobes.
  • To identify differences in molecular signaling, thyrotropin receptor expression, and cellular homeostasis between the two lobes.

Main Methods:

  • Biochemical assays
  • Immunohistochemistry
  • Immunoblotting
  • Immunofluorescence analysis

Main Results:

  • The right thyroid lobe exhibits a higher activation index and increased sensitivity to thyrotropin.
  • The right lobe is enriched in thyrotropin receptor, caveolin 1, and key cell signaling molecules (stat3, raf1, sphingomyelinase, sphingomyelin-synthase).
  • The right lobe shows a greater proportion of calcitonin-dependent areas and distinct molecular profiles.

Conclusions:

  • Significant morpho-functional disparities exist between the right and left thyroid lobes.
  • The right lobe's unique molecular composition and higher activation may predispose it to pathological changes.
  • Understanding these lobe-specific differences is crucial for comprehending thyroid gland physiology and disease susceptibility.