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Hormones and Bone Tissue

Hormones and Bone Tissue

The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...

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...

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 iodine is then...

Skeleton and Calcium Homeostasis

Skeleton and Calcium Homeostasis

Calcium is not only the most abundant mineral in bone but also the most abundant mineral in the human body. Calcium ions are needed for bone mineralization, tooth health, heart rate regulation and strength of contraction, blood coagulation, the contraction of smooth and skeletal muscle cells, and the regulation of nerve impulse conduction. The average calcium level in the blood is about 10 mg/dL. When the body cannot maintain this level, a person will experience hypo or hypercalcemia.

Synthesis and Functions of Calcitonin

Synthesis and Functions of Calcitonin

Calcitonin, a vital polypeptide hormone, regulates calcium levels within body fluids. It is released by the parafollicular cells, also known as C cells, situated in the follicular epithelium of the thyroid gland. Calcitonin responds to fluctuations in blood calcium levels and the influence of gastrointestinal hormones like gastrin and cholecystokinin.
The exact mechanisms by which calcitonin operates in calcium homeostasis remain elusive, but its significance is evident in several vital...

Bone Remodeling

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Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.

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Related Experiment Video

Updated: Jun 3, 2026

An Ex vivo Culture System to Study Thyroid Development

An Ex vivo Culture System to Study Thyroid Development

Published on: June 6, 2014

Thyroid hormones and bone development.

C E Combs¹, J J Nicholls, J H Duncan Bassett

¹Molecular Endocrinology Group, Department of Medicine and Medical Research Council Clinical Sciences Centre, Imperial College London, Hammersmith Campus, London, UK.

Minerva Endocrinologica

|April 5, 2011

Summary

This summary is machine-generated.

Thyroid hormones are essential for bone development in children. This review explores how thyroid hormone imbalances impact skeletal growth and maturation, using mouse models to uncover underlying molecular mechanisms.

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Culturing and Measuring Fetal and Newborn Murine Long Bones

Culturing and Measuring Fetal and Newborn Murine Long Bones

Published on: April 26, 2019

Related Experiment Videos

Last Updated: Jun 3, 2026

An Ex vivo Culture System to Study Thyroid Development

An Ex vivo Culture System to Study Thyroid Development

Published on: June 6, 2014

Culturing and Measuring Fetal and Newborn Murine Long Bones

Culturing and Measuring Fetal and Newborn Murine Long Bones

Published on: April 26, 2019

Area of Science:

Endocrinology
Developmental Biology
Orthopedics

Background:

Thyroid hormones play a crucial role in postnatal skeletal development.
Thyroid hormone deficiency or excess causes significant abnormalities in linear growth and bone maturation in children.
Mutant mouse models replicate these clinical findings, aiding mechanistic studies.

Purpose of the Study:

To review the direct and indirect effects of thyroid hormone on bone.
To elucidate the molecular mechanisms underlying thyroid hormone action in the developing skeleton.

Main Methods:

Review of existing literature on thyroid hormone and skeletal development.
Analysis of data from mutant mouse models recapitulating thyroid hormone dysfunction.
Detailed examination of molecular pathways involved in thyroid hormone signaling in bone.

Main Results:

Thyroid hormones exert both direct and indirect influences on bone cells and processes.
Specific molecular pathways mediating these effects have been identified.
Disruptions in thyroid hormone signaling lead to distinct skeletal abnormalities.

Conclusions:

Thyroid hormones are indispensable for normal postnatal skeletal development.
Understanding the molecular mechanisms of thyroid hormone action is key to addressing growth and maturation disorders.
Further research in this area can inform therapeutic strategies for skeletal abnormalities.