Related Experiment Videos
[Osteoporosis secondary to various disorders]
1Internal Medicine 1, Faculty of Medicine, Shimane University, Japan.
Summary
Secondary osteoporosis arises from various conditions, including primary hyperparathyroidism, rheumatoid arthritis, type 2 diabetes mellitus, and chronic kidney disease. In type 2 diabetes and chronic kidney disease, fractures are linked more to diminished bone quality than reduced bone mass.
Area of Science:
- Endocrinology
- Nephrology
- Rheumatology
Context:
- Secondary osteoporosis is a significant health concern, often linked to underlying medical conditions and treatments.
- Prevalent causes include primary hyperparathyroidism, rheumatoid arthritis, type 2 diabetes mellitus, and chronic kidney disease.
Purpose:
- To summarize the common causes of secondary osteoporosis.
- To highlight the distinct fracture mechanisms in type 2 diabetes mellitus and chronic kidney disease.
Summary:
- Secondary osteoporosis results from diverse factors such as metabolic disorders and medications.
- Key contributing conditions are primary hyperparathyroidism, rheumatoid arthritis, type 2 diabetes mellitus, and chronic kidney disease.
- Fractures in type 2 diabetes mellitus and chronic kidney disease are primarily associated with impaired bone quality over bone mass.
Impact:
- Provides a concise overview of secondary osteoporosis etiologies.
- Differentiates fracture pathogenesis in specific metabolic and renal diseases.
- Informs clinical awareness and research into bone health in complex patient populations.
Related Concept Videos
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 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...
The Functions of the Skeletal System
The most apparent functions of the skeletal system are support, protection, and movement. However, bone tissue also performs several other critical metabolic functions. For one, the bone matrix acts as a reservoir for a number of minerals important to the functioning of the body, especially calcium and phosphorus. These minerals, present in the bone tissue, can be released back into the bloodstream when required. Calcium ions, for example, are essential for muscle contractions and controlling...
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?
Overview
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
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...
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...