14-3-3 η inhibits chondrogenic differentiation of ATDC5 cell

It was previously shown that 14-3-3 η is overexpressed in the synovial fluid of patients with joint inflammation, which is often associated with growth failure. In this study, we investigated the role of 14-3-3 η in chondrogenesis using ATDC5 cells. Upon treatment with TNF-α, cells overexpressed 14-3-3 η with inhibition of chondrogenesis. Chondrogenesis was also inhibited by overexpression of 14-3-3 η without TNF-α treatment, whereas silencing of 14-3-3 η promoted chondrogenic differentiation. Further, G1 phase arrest was inhibited by overexpression of 14-3-3 η. In summary, we suggest that 14-3-3 η plays a regulatory role in chondrogenic differentiation.