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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...
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...
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...
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...
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.
Sexually Transmitted Infections01:26

Sexually Transmitted Infections

Sexually transmitted infections (STIs) are diseases transmitted primarily through unsafe sexual interactions. Bacteria, viruses, or parasites cause them and can result in severe health complications if untreated.ChlamydiaThe bacterium Chlamydia trachomatis is responsible for the disease Chlamydia, the most common STI in the United States. This peculiar pathogen requires human cells to reproduce, residing intracellularly. The initial infection often goes unnoticed because it typically does not...

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Related Experiment Video

Updated: Jun 17, 2026

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
07:56

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts

Published on: January 29, 2018

HIV and bone mineral density.

Patrick W G Mallon1

  • 1HIV Molecular Research Group, School of Medicine and Medical Sciences, University College Dublin, Ireland. paddy.mallon@ucd.ie

Current Opinion in Infectious Diseases
|December 17, 2009
PubMed
Summary
This summary is machine-generated.

Low bone mineral density (BMD) is common in HIV patients due to traditional factors, HIV itself, and antiretroviral therapy. More research is needed to understand causes and optimal treatment for HIV-related low BMD.

Related Experiment Videos

Last Updated: Jun 17, 2026

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
07:56

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts

Published on: January 29, 2018

Area of Science:

  • Bone Metabolism and HIV Research
  • Clinical Infectious Diseases
  • Endocrinology

Background:

  • Low bone mineral density (BMD) is a significant concern in individuals with human immunodeficiency virus (HIV).
  • Multiple factors contribute to reduced BMD, including traditional risk factors, the virus itself, and antiretroviral therapies.
  • Understanding the interplay of these factors is crucial for effective patient management.

Purpose of the Study:

  • To review the clinical manifestations and pathogenesis of low BMD in the context of HIV infection.
  • To discuss the broader management strategies for low BMD in this population.
  • To identify knowledge gaps and areas requiring further investigation.

Main Methods:

  • Literature review focusing on clinical aspects, pathogenesis, and management of low BMD in HIV.
  • Analysis of current research on the role of antiretroviral therapy in bone health.
  • Synthesis of findings to outline areas of incomplete understanding.

Main Results:

  • Low BMD is highly prevalent among HIV-infected patients.
  • Both traditional risk factors and HIV-related elements, including antiretroviral therapy, contribute to low BMD.
  • The precise impact of specific antiretrovirals on BMD is debated, with significant changes often occurring at treatment initiation or modification.

Conclusions:

  • Further research is essential to elucidate the mechanisms driving low BMD in HIV.
  • Clarification is needed on whether low BMD in HIV patients leads to an increased risk of fractures.
  • Optimal therapeutic strategies for managing low BMD in HIV, especially in younger individuals, require determination.