Abstract
Osteoporosis results from an imbalance in bone remodeling, in which osteoclastic bone resorption exceeds osteoblastic bone formation. Iron has recently been recognized as an independent risk factor for osteoporosis. Reportedly, excess iron could promote osteoclast differentiation and bone resorption through the production of reactive oxygen species (ROS). We evaluated the effect of iron on osteoblast differentiation and bone formation in zebrafish and further investigated the potential benefits of deferoxamine (DFO), a powerful iron chelator, in iron-overloaded zebrafish. The zebrafish model of iron overload described in this study demonstrated an apparent inhibition of bone formation, accompanied by decreased expression of osteoblast-specific genes (runx2a, runx2b, osteocalcin, osteopontin, ALP, and collagen type I). The negative effect of iron on osteoblastic activity and bone formation could be attributed to increased ROS generation and oxidative stress. Most importantly, we revealed that DFO was capable of removing whole-body iron and attenuating oxidative stress in iron-overloaded larval zebrafish, which facilitated larval recovery from the reductions in bone formation and osteogenesis induced by iron overload.
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Acknowledgments
This work was supported in part by the National Natural Science Foundation of China (81273090), a Jiangsu Provincial Grant (BK2012608), Science and Technology Projects of Suzhou (SS201327), and the Foundation Program of Suzhou Key Laboratory of High Technology (SZS201208). All institutional and national guidelines for the care and use of laboratory animals were followed.
Conflicts of interest
Bin Chen, Yi-Lin Yan, Chen Liu, Lin Bo, Guang-Fei Li, Han Wang, You-Jia Xu state that they have no conflicts of interest
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Chen, B., Yan, YL., Liu, C. et al. Therapeutic Effect of Deferoxamine on Iron Overload-Induced Inhibition of Osteogenesis in a Zebrafish Model. Calcif Tissue Int 94, 353–360 (2014). https://doi.org/10.1007/s00223-013-9817-4
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DOI: https://doi.org/10.1007/s00223-013-9817-4