Activation of intracellular calcium signaling in osteoblasts colocalizes with the formation of post-yield diffuse microdamage in bone matrix
- 2 March 2016
- journal article
- Published by Portico in BoneKEy Reports
- Vol. 5, 778
- https://doi.org/10.1038/bonekey.2016.5
Abstract
Previous studies demonstrated that extracellular calcium efflux ([Ca(2+)]E) originates from the regions of bone extracellular matrix that are undergoing microdamage. Such [Ca(2+)]E is reported to induce the activation of intracellular calcium signaling ([Ca(2+)]I) in MC3T3-E1 cells. The current study investigated the association between microdamage and local activation of intracellular calcium signaling quantifiably in MC3T3-E1 cells. Cells were seeded on devitalized notched bovine bone samples to induce damage controllably within the field of observation. A sequential staining procedure was implemented to stain for intracellular calcium activation followed by staining for microdamage on the same sample. The increase in [Ca(2+)]I fluorescence in cells of mechanically loaded samples was greater than that of unloaded negative control cells. The results showed that more than 80% of the cells with increased [Ca(2+)]I fluorescence were located within the damage zone. In conclusion, the findings demonstrate that there are spatial proximity between diffuse microdamage induction and the activation of intracellular calcium ([Ca(2+)]I) signaling in MC3T3-E1 cells. The downstream responses to the observed activation in future research may help understand how bone cells repair microdamage.Keywords
This publication has 46 references indexed in Scilit:
- Mechanical Stretch Induced Calcium Efflux from Bone Matrix Stimulates OsteoblastsBone, 2012
- Activation of bone remodeling after fatigue: Differential response to linear microcracks and diffuse damageBone, 2010
- Effect of Calcium Ion Concentrations on Osteogenic Differentiation and Hematopoietic Stem Cell Niche-Related Protein Expression in OsteoblastsTissue Engineering, Part A, 2010
- Osteocyte Apoptosis Controls Activation of Intracortical Resorption in Response to Bone FatigueJournal of Bone and Mineral Research, 2009
- In vivo linear microcracks of human femoral cortical bone remain parallel to osteons during agingBone, 2008
- Dlx5, a Positive Regulator of Osteoblastogenesis, is Essential for Osteoblast-Osteoclast CouplingThe American Journal of Pathology, 2008
- Mechanical regulation of osteoclastic genes in human osteoblastsBiochemical and Biophysical Research Communications, 2008
- Ca2+ stimulates COX-2 expression through calcium-sensing receptor in fibroblastsBiochemical and Biophysical Research Communications, 2006
- Cbfa1 Contributes to the Osteoblast-specific Expression of type I collagen GenesOnline Journal of Public Health Informatics, 2001
- Effects of high calcium concentration on the functions and interactions of osteoblastic cells and monocytes and on the formation of osteoclast-like cellsJournal of Bone and Mineral Research, 1993