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Related Concept Videos

Hormones and Bone Tissue01:17

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Gonadal and Placental Hormones01:24

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The gonads, namely the testes in males and the ovaries in females, are pivotal in producing gonadal hormones that orchestrate the intricate processes of sexual development and reproduction.
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The intricate hormonal interplay essential for male reproductive health begins with the release of gonadotropin-releasing hormone (GnRH) by the hypothalamus. This hormone prompts the pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). LH targets the Leydig cells in the testes, stimulating them to produce and release testosterone. In concert with testosterone, FSH acts on the Sertoli cells within the seminiferous tubules to facilitate the release of...
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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)...
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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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Osteoclast Derivation from Mouse Bone Marrow
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[Bone and androgens].

Georges Weryha1, Anna Angelousi1, Demba Diehdiou2

  • 1CHU de Nancy, service d'endocrinologie, 54500 Vandœuvre-lès-Nancy, France.

Presse Medicale (Paris, France : 1983)
|December 17, 2013
PubMed
Summary
This summary is machine-generated.

Sexual steroids, including estrogens and androgens, are crucial for bone health and skeletal maturation in both sexes. Androgen deficiency significantly increases fracture risk, highlighting their importance in maintaining bone density.

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Area of Science:

  • Endocrinology
  • Bone Biology
  • Skeletal Physiology

Context:

  • Sexual steroids significantly influence skeletal maturation and bone homeostasis.
  • Estrogens are essential for bone formation and growth plate fusion in both males and females.
  • Androgens primarily contribute to bone length and width expansion in males.

Purpose:

  • To elucidate the roles of sexual steroids, particularly androgens, in bone metabolism.
  • To explain the biomechanical differences between sexes related to steroid hormones.
  • To investigate the mechanisms by which androgens regulate bone turnover.

Summary:

  • Estrogens are vital for endochondral bone formation and growth plate closure in both sexes.
  • Androgens promote longitudinal and radial bone growth, contributing to sex-specific biomechanics.
  • Androgen deficiency leads to accelerated bone loss and elevated fracture risk, with limited rationale for androgen therapy in andropause.

Impact:

  • Androgens modulate bone metabolism via the medulla-bone unit, influencing osteoblastic and osteoclastic activity.
  • Key regulatory pathways, including RANK/osteoprotegerin and Wnt/sclerostin, are implicated in androgen's bone effects.
  • Understanding these pathways can inform therapeutic strategies for bone disorders related to hormonal imbalances.