Abstract
Ethanol and glucocorticoids are risk factors associated with osteonecrosis. Previous reports suggest ethanol and glucocorticoids induce adipogenesis, decrease osteogenesis in bone marrow stroma cells, and produce intracellular lipid deposits resulting in death of osteocytes. The Wnt/β-catenin signal pathway is involved in the regulation of homeostasis of bone and we presume glucocorticoids and ethanol may induce osteonecrosis in humans through a similar mechanism as in rodents. We hypothesized (1) ethanol, like glucocorticoids, decreases osteogenesis and increases adipogenesis through the Wnt/β-catenin signaling pathway in human bone marrow stromal cells; and (2) ethanol decreases intranuclear translocation of β-catenin. We found both dexamethasone and ethanol decrease the gene and protein expression of osteogenesis and increase that of adipogenesis through Wnt signaling-related genes by semiquantitative and quantitative polymerase chain reaction and Western blot. Ethanol hampered intranuclear translocation of β-catenin by immunofluorescence analysis. The data suggest the Wnt/β-catenin signaling pathway may be associated with ethanol-induced osteonecrosis.
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Acknowledgments
We thank Yi-Jen Chen for helping in the experimental process and Dr Chung-Hwan Chen for the preparation of the manuscript. We also thank Chihuei Wang, PhD, for help with the experiment and discussion.
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Ching-Hua Yeh and Je-Ken Chang contributed equally to this manuscript.
One or more of the authors (GJW, JKC, MLH) have received funding from the National Health Research Institute of Taiwan (NHRI-EX94-9316EP and NHRI-EX96-9615EP), the Hip Society, Technology Development Program for Academia in Taiwan (96-EC-17-A-17-S1-041), and Zimmer, Inc.
Each author certifies that his or her institution has approved the human protocol for this investigation, that all investigations were conducted in conformity with ethical principles of research, and that informed consent for participation in the study was obtained.
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Yeh, CH., Chang, JK., Wang, YH. et al. Ethanol May Suppress Wnt/β-catenin Signaling on Human Bone Marrow Stroma Cells. Clin Orthop Relat Res 466, 1047–1053 (2008). https://doi.org/10.1007/s11999-008-0171-1
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DOI: https://doi.org/10.1007/s11999-008-0171-1