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Related Concept Videos

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...
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...
Urinary Tract Calculi IV: Nutrition Therapy and Prevention01:27

Urinary Tract Calculi IV: Nutrition Therapy and Prevention

Management of renal calculi focuses on effective strategies like tailored nutrition and hydration therapy. Adjusting diet and fluid intake reduces stone formation and recurrence, making these interventions simple yet powerful in kidney stone prevention and management.Understanding Kidney StonesKidney stones form when calcium, oxalate, uric acid, and cystine concentrate and crystallize in urine. Factors contributing to their formation include genetic predisposition, certain medical conditions,...
Chronic Kidney Disease III: Interprofessional Care01:28

Chronic Kidney Disease III: Interprofessional Care

Chronic kidney disease (CKD) requires collaborative and comprehensive management. CKD progresses through stages and can lead to end-stage kidney disease (ESKD) if untreated. Interprofessional collaboration and patient education are crucial, enabling patients to manage their health and improve their quality of life.Diagnostic approach for chronic kidney diseaseThe diagnosis of CKD primarily focuses on the glomerular filtration rate (GFR), which assesses kidney function by measuring how well...
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.
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...

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Related Experiment Videos

Selecting patients for osteoporosis therapy.

Stuart L Silverman1

  • 1Cedars-Sinai Medical Center and University of California, Los Angeles, 8641 Wilshire Blvd., Suite 301, Beverly Hills, CA 90211, USA. stuarts@omcresearch.org

Annals of the New York Academy of Sciences
|December 7, 2007
PubMed
Summary

Identifying individuals at risk for osteoporotic fracture is crucial. Combining clinical risk factors with bone mineral density (BMD) improves fracture risk prediction, avoiding unnecessary treatments.

Related Experiment Videos

Area of Science:

  • Osteoporosis research
  • Clinical risk assessment
  • Public health

Background:

  • Current methods for identifying osteoporotic fracture risk are insufficient.
  • Bone mineral density (BMD) alone does not identify all high-risk individuals.
  • Central DXA-based BMD is not globally accessible.

Purpose of the Study:

  • To improve the identification of individuals at high risk for osteoporotic fracture.
  • To reduce unnecessary treatment for low-risk individuals.
  • To develop a risk prediction model using clinical factors and BMD.

Main Methods:

  • Utilizing clinical risk factors, with or without BMD data.
  • Integrating identified clinical risk factors into a predictive model.
  • Defining regional intervention thresholds based on economic factors.

Main Results:

  • Clinical risk factors improve the gradient of fracture risk.
  • A combined approach enhances the identification of high-risk patients.
  • The model predicts 10-year absolute fracture risk.

Conclusions:

  • Clinical risk factors are essential for accurate osteoporotic fracture risk assessment.
  • A comprehensive risk assessment strategy is needed globally.
  • Regionally defined intervention thresholds are necessary for effective treatment allocation.