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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...

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.

What is the Skeletal System?

What is the Skeletal System?

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...

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...

Skeleton and Calcium Homeostasis

Skeleton and Calcium Homeostasis

Calcium is not only the most abundant mineral in bone but also the most abundant mineral in the human body. Calcium ions are needed for bone mineralization, tooth health, heart rate regulation and strength of contraction, blood coagulation, the contraction of smooth and skeletal muscle cells, and the regulation of nerve impulse conduction. The average calcium level in the blood is about 10 mg/dL. When the body cannot maintain this level, a person will experience hypo or hypercalcemia.

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Related Experiment Video

Updated: Jun 7, 2026

Murine Hind Limb Long Bone Dissection and Bone Marrow Isolation

Murine Hind Limb Long Bone Dissection and Bone Marrow Isolation

Published on: April 14, 2016

Renal bone disease.

Stuart M Sprague¹

¹NorthShore University HealthSystem, University of Chicago Pritzker School of Medicine, Evanston, Illinois, USA. stuartmsprague@gmail.com

Current Opinion in Endocrinology, Diabetes, and Obesity

|October 30, 2010

Summary

This summary is machine-generated.

Early identification and treatment of mineral metabolism disturbances in chronic kidney disease (CKD) can prevent renal osteodystrophy and reduce patient morbidity. This review aids clinicians in managing bone disease in CKD patients.

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A Novel in vivo Gene Transfer Technique and in vitro Cell Based Assays for the Study of Bone Loss in Musculoskeletal Disorders

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Published on: June 8, 2014

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Last Updated: Jun 7, 2026

Murine Hind Limb Long Bone Dissection and Bone Marrow Isolation

Murine Hind Limb Long Bone Dissection and Bone Marrow Isolation

Published on: April 14, 2016

A Novel in vivo Gene Transfer Technique and in vitro Cell Based Assays for the Study of Bone Loss in Musculoskeletal Disorders

A Novel in vivo Gene Transfer Technique and in vitro Cell Based Assays for the Study of Bone Loss in Musculoskeletal Disorders

Published on: June 8, 2014

Area of Science:

Nephrology
Endocrinology
Bone Metabolism

Background:

Renal osteodystrophy is a common complication of chronic kidney disease (CKD).
Disordered mineral metabolism (phosphate retention, hypocalcemia, vitamin D deficiency, hyperparathyroidism) occurs early in CKD.
Recent evidence links mineral metabolism disturbances to increased cardiovascular mortality in CKD.

Purpose of the Study:

To review the pathophysiology of mineral metabolism and bone disease in CKD.
To discuss the impact of these disturbances on skeletal structure and turnover.
To assist clinicians in early identification and management of renal osteodystrophy.

Main Methods:

Literature review of current research on renal osteodystrophy and mineral metabolism in CKD.
Discussion of the KDIGO classification system for mineral and bone disorders.
Analysis of the relationship between hyperparathyroidism and bone turnover.

Main Results:

Mineral metabolism disturbances significantly affect bone structure and turnover in CKD patients.
Hyperparathyroidism severity correlates with bone turnover.
Bone biopsy remains the definitive diagnostic method for specific bone lesions.

Conclusions:

Early identification of patients at risk for renal osteodystrophy is crucial.
Therapeutic strategies can prevent and correct mineral metabolism disturbances.
Effective management can reduce morbidity associated with renal osteodystrophy.