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Related Concept Videos

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

Role of Vitamins in Maintaining Bone Health

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.
Vitamin A
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.
Vitamin B12
Vitamin B12 acts as a cofactor during the formation of osteoblast-related proteins, such as osteocalcin. Vitamin B12 plays a role...
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.
Essential Minerals for Bone Health01:31

Essential Minerals for Bone Health

The minerals contained in all of the food we consume are essential for our organ systems. However, certain essential minerals, such as calcium, phosphorus, magnesium, manganese, and fluoride, largely affect bone health.
Calcium and Phosphorus
Calcium is a critical component of bones, especially in the form of calcium phosphate and calcium carbonate. Since the body cannot make calcium, it must be obtained from the diet. However, calcium cannot be absorbed from the small intestine without...
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...

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Related Experiment Videos

Osteoporosis guidelines.

D H Barlow1

  • 1Executive Dean of Medicine, University of Glasgow, Glasgow, UK.

Climacteric : the Journal of the International Menopause Society
|October 27, 2007
PubMed
Summary
This summary is machine-generated.

This paper reviews osteoporosis guidelines, emphasizing fracture risk assessment over simple bone density for hormone therapy decisions. Prevention is key for managing bone health and reducing fractures.

Related Experiment Videos

Area of Science:

  • Endocrinology
  • Gerontology
  • Public Health

Background:

  • The International Menopause Society (IMS) 2004 Position Statement advocated hormone therapy for preventing bone loss and fractures.
  • Current osteoporosis guidelines are evolving from solely bone density thresholds to incorporating fracture risk probability.

Purpose of the Study:

  • To update the IMS Position Statement by evaluating the relevance of current osteoporosis guidelines.
  • To assess the shift in osteoporosis management strategies towards fracture risk assessment.

Main Methods:

  • Review of International Menopause Society (IMS) statements and osteoporosis guidelines.
  • Analysis of consensus statements and evidence-based guidelines from expert groups.
  • Consideration of the International Osteoporosis Foundation/National Osteoporosis Foundation Position Paper.

Main Results:

  • Guidelines increasingly link intervention thresholds to estimated fracture risk probability, not just bone density.
  • A comprehensive approach considers bone mineral density alongside clinical risk factors for intervention decisions.
  • The IMS Paper on Postmenopausal Osteoporosis (2005) reflects this integrated approach.

Conclusions:

  • The focus in osteoporosis management has shifted towards a more personalized, risk-based approach.
  • Integrating clinical risk factors with bone density improves the accuracy of osteoporosis assessment and intervention.
  • This updated approach supports the primary goal of fracture prevention.