Circ_0090231 sequestered miR-9-5p in HUVECs. A) The biology website starBase predicted that there was a binding site between circ_0090231 and miR-9-5p. B) The binding was verified by dual-luciferase reporter assay. C) RIP assay was used to detect the enrichment of circ_0090231 in the RISC of HUVECs transfected with miR-NC mimic or miR-9-5p mimic using anti-Ago2 or IgG antibody. D) Circ_0090231 level was determined in HUVECs treated with control, ox-LDL, ox-LDL + vector, and ox-LDL + oe-circ_0090231 by RT-qPCR assay. E) miR-9-5p level was measured in HUVECs treated with control, ox-LDL, ox-LDL + sh-NC, ox-LDL + sh-circ_0090231, ox-LDL + vector, and ox-LDL + oecirc_ 0090231 by RT-qPCR assay. *p < 0.05