FOXP4 weakened circRPPH1 knockdown-mediated suppression of BC cell growth, metastasis and glycolysis. A: Overexpression of FOXP4 was confirmed by Western blotting; B-D: CCK8 and colony formation assay for determining the growth of BC cells; E, F: Transwell assays for evaluating BC cell migratory and invasive abilities (200×); G-I: The glycolysis of BC cells was assessed using commercial kits; J: Western blotting for PCNA, MMP9, and HK2 protein abundance. Data are shown as mean ± standard deviation, **P<0.01, ***P<0.001.