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Hormones and Bone Tissue01:17

Hormones and Bone Tissue

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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.
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Major Hormones and Their Functions01:27

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Hormones, the biochemical messengers produced by endocrine glands, are pivotal in regulating bodily functions and maintaining homeostasis. Each hormone's balance is crucial; imbalances can lead to significant physiological disruptions. Major hormones include oxytocin, cortisol, epinephrine, estrogen, testosterone, thyroxine, growth hormone, insulin, and glucagon.
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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.
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Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
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Hormonal Regulation01:33

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The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
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Hormonal Regulation01:40

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Hormones regulate a significant portion of digestion through activation of the neuroendocrine system. The neuroendocrine system of digestion contains many different hormones all with multiple functions that are both, directly and indirectly, involved in digestion.
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The Creation of a Rat Model for Osteosarcopenia via Ovariectomy
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Hormones and Sarcopenia.

John E Morley1

  • 1Division of Geriatric Medicine, Saint Louis University, School of Medicine 1402 S. Grand Blvd., M238 St. Louis, MO 63104, United States.

Current Pharmaceutical Design
|November 25, 2016
PubMed
Summary
This summary is machine-generated.

Sarcopenia, the loss of muscle mass and function, impacts health and mortality. While hormonal factors like testosterone and vitamin D play roles, resistance exercise and nutritional support are key treatments.

Keywords:
SarcopeniaVitamin D.disabilityfrailtyhormonesmuscle

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Area of Science:

  • Gerontology
  • Muscle Physiology
  • Endocrinology

Background:

  • Sarcopenia is characterized by loss of muscle mass and function, increasing frailty, disability, and mortality.
  • Prevalence varies, affecting 1-29% in community settings and 14-33% in long-term care.
  • Consensus definitions exist, but a rapid screen test (SARC-F) avoids ethnic-specific cut-offs.

Purpose of the Study:

  • To review the role of hormones in sarcopenia development.
  • To discuss current treatment strategies for sarcopenia.

Main Methods:

  • Literature review of sarcopenia definitions, prevalence, and contributing factors.
  • Analysis of hormonal influences including testosterone, growth hormone, insulin, and vitamin D.
  • Summary of current therapeutic interventions.

Main Results:

  • Testosterone is central to muscle mass and function; its deficiency contributes to sarcopenia.
  • Growth hormone deficiency affects mass but not strength; insulin resistance accelerates sarcopenia.
  • Vitamin D deficiency impacts muscle strength; other hormones have minor roles.

Conclusions:

  • Hormonal imbalances, particularly testosterone deficiency and insulin resistance, significantly contribute to sarcopenia.
  • Effective treatments include resistance exercise, essential amino acids (like leucine), and vitamin D supplementation.