Related Experiment Video
Updated: Jun 29, 2026
11:05
Analysis of Oxidative Stress in Zebrafish Embryos
Published on: July 7, 2014
Oxidative stress, free radicals and bone remodeling
Giuseppe Banfi1, Eugenio L Iorio, Massimiliano M Corsi
1Laboratory of Cell Culture and Molecular Biology, IRCCS Istituto Ortopedico Galeazzi, Milan, Italy.
Clinical Chemistry and Laboratory Medicine
|October 14, 2008
Summary
Reactive oxygen species (ROS) play a dual role in bone metabolism. While essential for bone remodeling, excessive ROS production during fractures may overwhelm antioxidant defenses, leading to hyperoxidant stress.
Area of Science:
- Biochemistry
- Cell Biology
- Skeletal Biology
Background:
- Reactive oxygen species (ROS) are implicated in aging and diseases like atherosclerosis and cancer.
- The role of ROS in bone metabolism is complex, with both beneficial and detrimental effects.
- Osteoclast-derived ROS aid in physiological bone remodeling.
Purpose of the Study:
- To investigate the dual role of ROS in bone metabolism.
- To clarify the link between osteoclast activity, ROS production, and skeletal pathologies.
- To determine if elevated ROS overwhelms antioxidant defenses in pathological bone conditions.
Main Methods:
- Literature review on ROS and bone metabolism.
- Analysis of ROS production in physiological and pathological bone states.
- Examination of osteoclast function and antioxidant capacity.
Main Results:
- ROS contribute to bone remodeling under physiological conditions.
- Radical generation significantly increases during bone fracture.
- A potential link exists between increased osteoclast activity, ROS production, and skeletal diseases.
Conclusions:
- ROS have a dual role in bone metabolism, crucial for remodeling but potentially harmful in excess.
- Further research is needed to understand if pathological ROS production leads to hyperoxidant stress.
- Clarifying the ROS-antioxidant balance is vital for understanding skeletal pathologies.
Related Concept Videos
01:40Bone 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.
01:31Osteoclasts 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...
01:29Bone 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...
01:31Bone Remodeling and Repair
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...
01:25Role 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...
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...
01:17Hormones 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...