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Related Concept Videos

Bone Disorders01:29

Bone Disorders

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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.
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...
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Osteoclasts in Bone Remodeling01:31

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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...
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Bone Remodeling01:40

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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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Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
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Hormones and Bone Tissue01:17

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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.
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...
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Role of Vitamins in Maintaining Bone Health01:25

Role of Vitamins in Maintaining Bone Health

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The growth and maintenance of bone are regulated by a combination of nutritional factors, including vitamins, such as vitamin A, B12, C, D, and K.
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Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
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Air Pollution and Osteoporosis.

Olivia Allen1,2, Martin M Knight1,2, Stefaan W Verbruggen3,4,5,6

  • 1Centre for Predictive in vitro Models, Queen Mary University of London, London, UK.

Current Osteoporosis Reports
|September 20, 2024
PubMed
Summary
This summary is machine-generated.

Air pollution exposure is linked to a higher risk of osteoporosis and fractures in the aging population. Further research into inflammatory pathways could reveal new therapeutic targets for bone disease.

Keywords:
Air pollutionBone mineral densityInflammationOsteoporosis

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Area of Science:

  • Environmental Health
  • Bone Biology
  • Inflammation Research

Background:

  • Osteoporosis poses a significant global health challenge, particularly for the aging population.
  • Increasing urbanization correlates with rising air pollution levels worldwide.
  • Fractures associated with osteoporosis contribute to increased mortality in the elderly.

Purpose of the Study:

  • To review the relationship between osteoporosis and air pollution.
  • To explore the potential role of inflammation in air pollution-induced bone disease.
  • To highlight the need for advanced research models in this field.

Main Methods:

  • Literature review of studies investigating air pollution and bone health.
  • Analysis of correlative data linking pollution levels to osteoporosis incidence.
  • Examination of proposed inflammatory mechanisms.

Main Results:

  • A significant correlation exists between high air pollution areas and increased osteoporosis risk.
  • Inflammatory cascades are suggested as a potential mechanism linking air pollution to bone loss.
  • Current animal models have limitations in fully replicating human responses to air pollution.

Conclusions:

  • Air pollution is an emerging risk factor for osteoporosis.
  • Understanding inflammatory pathways is crucial for developing novel osteoporosis therapies.
  • Advanced in vitro models, like organ-on-a-chip technology, are needed to study air pollution's impact on bone.