Bone Homeostasis and Cellular Interactions - Bone homeostasis involves multiple coordinated cellular and molecular events. - Osteoblasts secrete new bone, while osteoclasts break down bone. - Close cooperation between osteoblasts, osteoclasts, and other cell populations is required for bone structure and calcium supply. - Bone metabolism relies on signaling pathways and control mechanisms involving hormones, cytokines, and growth factors.
Bone Remodeling Process - Bone remodeling is an active, continual process that maintains proper calcium levels. - Osteoblasts actively synthesize osteoid containing two osteocytes. - Osteoclasts have multiple nuclei and a foamy cytosol. - Illustration showing the bone remodeling cycle.
Related Concepts - Biomineralization, the process of forming and maintaining mineralised tissues. - Tissue remodeling. - Wolff's law, which states that bone adapts to the loads placed upon it.
References - Wheeless Textbook. - Online Medical Dictionary. - Raggatt, L. J. et al. (2010). Cellular and Molecular Mechanisms of Bone Remodeling. The Journal of Biological Chemistry, 285(33), 25103–25108. - Sims, N. A. et al. (2014). Coupling the activities of bone formation and resorption: a multitude of signals within the basic multicellular unit. BoneKey Reports, 3, 481. - Shirazi, S., Ravindran, S., & Cooper, L. F. (2022). Topography-mediated immunomodulation in osseointegration; Ally or Enemy. Biomaterials, 291, 121903.
Note - The last bullet point is incomplete as there are not enough references provided.