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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...

Functions of Thyroid Hormones

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...

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Related Experiment Video

Updated: Jul 17, 2025

Author Spotlight: Investigating Islet Abnormalities and Function with a Pseudoislet Protocol

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Thyroxine biosensors: a review on progress and challenges.

Deepanmol Singh¹, Anu Bharti², Ashish Mathur²

¹School of Health Sciences & Technology, University of Petroleum & Energy Studies (UPES), Dehradun, India.

|August 31, 2023

Summary

Hypothyroidism requires monitoring thyroxine levels. Point-of-care biosensors offer a promising, accessible alternative to traditional labs for detecting this crucial biomarker.

Keywords:

aptamers bioreceptors biosensors electrochemistry molecularly imprinted polymers nanomaterials thyroxine

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Last Updated: Jul 17, 2025

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Area of Science:

Biomedical Engineering
Analytical Chemistry
Endocrinology

Background:

Hypothyroidism is a widespread endocrine disorder requiring continuous monitoring and treatment.
Thyroxine (T4) is the primary biomarker for diagnosing and managing hypothyroidism.
Accessibility to diagnostic laboratories for thyroxine level monitoring is a significant challenge for patients.

Purpose of the Study:

To highlight the critical need for accessible point-of-care (POC) biosensors for thyroxine detection.
To review the essential components and considerations for developing effective thyroxine biosensors.
To discuss the current challenges and future prospects in the field of thyroxine biosensing.

Main Methods:

Review of existing literature on thyroxine detection and biosensor technology.
Analysis of the physicochemical properties of the thyroxine molecule relevant to biosensing.
Discussion of various nanomaterials and bioreceptors employed in biosensor design.

Main Results:

Several studies demonstrate high sensitivity, selectivity, and stability in experimental thyroxine biosensors.
Despite promising research, a commercial POC thyroxine biosensing device is currently unavailable.
Key aspects of thyroxine biosensor development, including material selection and design, are identified.

Conclusions:

Point-of-care thyroxine biosensors represent a significant advancement for hypothyroidism management.
Overcoming current challenges is crucial for the successful commercialization of these devices.
Further research and development are needed to bring these vital diagnostic tools to patients.