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Related Concept Videos

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...
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...
What is the Endocrine System?00:46

What is the Endocrine System?

The endocrine system sends hormones—chemical signals—through the bloodstream to target cells—the cells the hormones selectively affect. These signals are produced in endocrine cells, secreted into the extracellular fluid, and then diffuse into the blood. Eventually, they diffuse out of the blood and bind to target cells which have specialized receptors to recognize the hormones.
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...
The Endocrine System01:29

The Endocrine System

The endocrine system is an extensive network of glands – organs or tissues in the body that create chemicals that control many bodily functions, that secrete hormones, which are chemical messengers that play essential roles in regulating various bodily functions. These hormones are secreted into the bloodstream and travel throughout the body. They require specific receptors to convey signals to cells possessing these corresponding receptors. This complex signaling mechanism ensures that every...
Endocrine Signaling01:45

Endocrine Signaling

Endocrine cells produce hormones to communicate with remote target cells found in other organs. The hormone reaches these distant areas using the circulatory system. This exposes the whole organism to the hormone but only those cells expressing hormone receptors or target cells are affected. Thus, endocrine signaling induces slow responses from its target cells but these effects also last longer.

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Related Experiment Video

Updated: Jun 22, 2026

In vivo Characterization of Endocrine Disrupting Chemical Effects via Thyroid Hormone Action Indicator Mouse
04:14

In vivo Characterization of Endocrine Disrupting Chemical Effects via Thyroid Hormone Action Indicator Mouse

Published on: October 6, 2023

A study on endocrine dysfunction in thalassaemia.

Soumitra Ghosh1, Sanjay K Bandyopadhyay, Ranjana Bandyopadhyay

  • 1Department of Medicine, Midnapore Medical College, Paschim Medinipur.

Journal of the Indian Medical Association
|June 26, 2009
PubMed
Summary

Hormonal imbalances, particularly hypogonadism and growth issues, are common in transfusion-dependent thalassemia patients. Elevated ferritin levels in females with hypogonadism suggest a link to iron overload.

Related Experiment Videos

Last Updated: Jun 22, 2026

In vivo Characterization of Endocrine Disrupting Chemical Effects via Thyroid Hormone Action Indicator Mouse
04:14

In vivo Characterization of Endocrine Disrupting Chemical Effects via Thyroid Hormone Action Indicator Mouse

Published on: October 6, 2023

Area of Science:

  • Endocrinology
  • Hematology
  • Genetics

Background:

  • Thalassemia is a genetic blood disorder requiring regular transfusions.
  • Transfusion-dependent thalassemia patients often develop iron overload.
  • Iron overload can lead to endocrine dysfunction, impacting growth and reproductive health.

Purpose of the Study:

  • To determine the prevalence and severity of hormonal imbalances in thalassemia patients.
  • To investigate the correlation between iron overload and endocrine abnormalities.
  • To assess the influence of patient characteristics on endocrine dysfunction.

Main Methods:

  • Studied 68 transfusion-dependent beta and E-beta-thalassemia patients with high ferritin levels.
  • Assessed hormonal function including growth, gonadal, and thyroid axes.
  • Utilized tests like the insulin tolerance test and serum hormone level measurements.

Main Results:

  • Hypogonadism was the most frequent endocrine abnormality (52.28% males, 35.89% females).
  • Growth retardation (20.58%) and reduced growth hormone reserve (7.35%) were also observed.
  • Hypogonadic females showed significantly higher mean serum ferritin levels.

Conclusions:

  • Hormonal imbalances, especially hypogonadism, are prevalent in transfusion-dependent thalassemia.
  • Iron overload may be linked to hypogonadism in females.
  • Subclinical hypothyroidism is present in a significant portion of patients, related to disease duration.