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Bone Remodeling

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.

Hormones and Bone Tissue

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...

Bone Disorders

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 Remodeling

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 Health

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...

Essential Minerals for Bone Health

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...

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Related Experiment Video

Updated: Jul 5, 2026

Studies on the Anti-Inflammatory Effect of Xiaoyao Pills in The Treatment of Postmenopausal Osteoporosis in Mice

Studies on the Anti-Inflammatory Effect of Xiaoyao Pills in The Treatment of Postmenopausal Osteoporosis in Mice

Published on: August 23, 2024

Medication-induced osteoporosis.

Meng-Yi Weng¹, Nancy E Lane

¹Department of Medicine, University of California at Davis, Sacramento, CA 95817, USA.

Current Osteoporosis Reports

|April 24, 2008

Summary

This summary is machine-generated.

Secondary osteoporosis can result from medications. Management strategies for drug-induced bone loss, including glucocorticoids, involve calcium, vitamin D, bisphosphonates, or parathyroid hormone.

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Area of Science:

Endocrinology
Pharmacology
Bone Biology

Background:

Osteoporosis is characterized by low bone mass and deterioration, leading to fractures.
Secondary osteoporosis arises from specific disorders or medications.
Certain drugs can significantly contribute to bone loss.

Purpose of the Study:

To review the pathogenesis of medication-induced osteoporosis.
To outline management strategies for drug-induced bone loss.
To provide guidance on bone health evaluation for patients on long-term medications.

Main Methods:

Review of the pathogenesis of glucocorticoid-induced bone loss.
Discussion of bone loss mechanisms from aromatase inhibitors, GnRH agonists, anticonvulsants, and PPIs.
Synthesis of current recommendations for managing drug-induced osteoporosis.

Main Results:

Glucocorticoid-induced bone loss can be managed with calcium, vitamin D, bisphosphonates, or parathyroid hormone.
Pathophysiology of bone loss associated with aromatase inhibitors, GnRH agonists, anticonvulsants, and PPIs is outlined.
Effective management strategies are available for various types of medication-induced bone loss.

Conclusions:

Medication-induced osteoporosis is a significant clinical concern.
A combination of supplementation and pharmacotherapy can effectively manage drug-induced bone loss.
Regular evaluation and proactive management are crucial for bone health in patients on prolonged medication therapy.