Fig. 2

The cytotoxicity of different concentrations (0, 0.0625, 0.25, 1, 2, 4, 8 and 16 mmol⋅L⁻¹) of AA-Tempol exposure for 0.5, 1, and 2 h on HUVEC cells was examined by CCK-8 assay. The cells treated with 0.0625, 0.25, 1, 2, 4 mmol⋅L⁻¹ AA-Tempol for 0.5 and 1 h did not displayed cell growth inhibition. The cells treated with 8 and 16 mmol⋅L⁻¹ AA-Tempol exposure for 0.5 and 1 h and 2, 4, 8 and 16 mmol⋅L⁻¹ AA-Tempol exposure for 2 h displayed mild cell growth inhibition. *P < 0.05 vs. normal control group