LINC00899 overexpression suppresses RBL2 expression and thereby activates the FoxO pathway in spinal ependymoma cells. a, LINC00899 expression and mRNA expression of RBL2, FoxO, p21, p27, Bax, Bcl-2, Vimentin and Annexin in response to the treatment of LINC00899 vector, siRNA-LINC00899, siRNA-RBL2 and siRNA-LINC00899 + siRNA-RBL2; b, protein expression of RBL2, FoxO, p21, p27, Bax, Bcl-2, Vimentin and Annexin in response to the treatment of LINC00899 vector, siRNA-LINC00899, siRNA-RBL2 and siRNA-LINC00899 + siRNA-RBL2; c, the protein bands of FoxO, RBL2, p21, p27, Bax, Bcl-2, Vimentin and Annexin; *, p < 0.05 vs. the normal group and blank group.