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Related Concept Videos

Hormones and Bone Tissue01:17

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...
Bone Disorders01:29

Bone Disorders

Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Bone Remodeling01:40

Bone Remodeling

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.
Osteoclasts in Bone Remodeling01:31

Osteoclasts in Bone Remodeling

Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during bone...
Signs of Puberty01:27

Signs of Puberty

Puberty is a critical phase, typically beginning between the ages of 8 and 13 in girls and 9 and 14 in boys, though timing can vary based on genetics, environmental factors, and overall health. This period is characterized by the development of secondary sexual characteristics and the attainment of reproductive potential. Endocrine changes underpin puberty, with hormonal surges of Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH) instigated by Gonadotropin-Releasing Hormone (GnRH)...
Hormones of the Adrenal Glands01:31

Hormones of the Adrenal Glands

Adrenal hormones play a pivotal role in maintaining the body's electrolyte balance and orchestrating responses to stress, showcasing the intricate functions of the adrenal cortex and medulla.
The adrenal cortex, a powerhouse of hormone synthesis, generates over two dozen corticosteroid hormones. The zona glomerulosa produces mineralocorticoids, exemplified by aldosterone, influencing the electrolyte composition of body fluids. The synthesis of glucocorticoids such as cortisol and corticosterone...

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Related Experiment Video

Updated: Jun 28, 2026

Osteoclast Derivation from Mouse Bone Marrow
06:17

Osteoclast Derivation from Mouse Bone Marrow

Published on: November 6, 2014

Androgens and bone.

Bart L Clarke1, Sundeep Khosla

  • 1Mayo Clinic W18-A, 200 1st Street SW, Rochester, MN 55905, USA. Clarke.Bart@mayo.edu

Steroids
|November 11, 2008
PubMed
Summary
This summary is machine-generated.

Estradiol plays a greater role in maintaining bone health than testosterone. However, androgens also directly benefit bone, though high synthetic androgen doses may harm bone by suppressing natural hormone levels.

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A Novel in vivo Gene Transfer Technique and in vitro Cell Based Assays for the Study of Bone Loss in Musculoskeletal Disorders
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Osteoclast Derivation from Mouse Bone Marrow
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A Novel in vivo Gene Transfer Technique and in vitro Cell Based Assays for the Study of Bone Loss in Musculoskeletal Disorders

Published on: June 8, 2014

Area of Science:

  • Endocrinology
  • Bone Biology
  • Reproductive Health

Background:

  • Testosterone is the primary male gonadal steroid, with smaller amounts produced by ovaries.
  • Adrenal glands produce weaker androgens like DHEA, DHEA-S, and androstenedione.
  • Androgens influence skeletal homeostasis throughout life in both sexes.

Purpose of the Study:

  • To clarify the relative contributions of testosterone and estradiol to skeletal health.
  • To investigate the direct and indirect effects of androgens on bone.
  • To examine potential adverse effects of high-dose synthetic androgens.

Main Methods:

  • Review of current scientific evidence on sex steroid and bone interactions.
  • Analysis of androgen metabolism and receptor-mediated effects.
  • Consideration of hormonal feedback mechanisms on bone health.

Main Results:

  • Estradiol appears to have a more significant role in skeletal maintenance than testosterone.
  • Androgens exert direct beneficial effects on bone.
  • Supraphysiological testosterone levels may act via androgen and estrogen receptors.

Conclusions:

  • Estradiol is crucial for skeletal health, but androgens also contribute positively.
  • The impact of high-dose synthetic, non-aromatizable androgens on bone requires further investigation due to potential suppression of endogenous hormones.