Interaction between MDM2 and PTEN. (A) The interaction between MDM2 and PTEN analyzed by STRING. (B) The binding of MDM2 and PTEN detected by co-immunoprecipitation. (C) The expression of PTEN in HUVECs treated with 40 µg/ml ox-LDL detected by RT-qPCR. (D) The effect of MDM2 knockdown on the transcription expression of PTEN detected by RT-qPCR. (E) The effect of MDM2 knockdown on the protein expression of PTEN detected by western blotting. **P<0.01, ***P<0.001. MDM2, murine double minute-2; PTEN, phosphatase and tensin homolog; STRING, Search Tool for the Retrieval of Interacting Genes/Proteins; ox-LDL, oxidized low-density lipoproteins; IP, immunoprecipitation; RT-q-PCR, reverse transcription-quantitative PCR; si, short interfering; NC, negative control.