Bone mesenchymal stem cell (BMSC) age-related changes include decreased osteogenesis and increased adipogenesis. Rev-erbα and the Wnt/β-catenin signaling pathway were known to play important roles in BMSC aging. In this study, we have aimed to elucidate whether Rev-erbα and Wnt/β-catenin signaling interact during BMSC proliferation and osteogenesis. Our results showed that Rev-erbα expression gradually dropped during BMSC osteogenesis, and overexpression of Rev-erbα in BMSCs inhibited cell proliferation and osteogenesis. The inhibition of cell proliferation induced by Rev-erbα overexpression was partially reversed when Wnt/β-catenin signaling was activated. These results suggested that Rev-erbα could promote BMSC aging and may be the negative regulator during the late stage of osteogenesis. The clock gene Rev-erbα and Wnt/β-catenin signaling interact in the regulation of cell proliferation.
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