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Figure 4 Effect of nebivolol, its 4-keto derivative, and atenolol on oxidized low-density lipoprotein (ox-LDL)-induced variations of nitric oxide (NO) in basal and bradykinin-stimulated bovine aortic endothelial cells. The cells were then stimulated with ox-LDL (50 µg protein/ml) for 10 min at 37°C. Results are expressed as mean fluorescence intensity (MFI) and are means ± SD of experiments performed in triplicate in six separate occasions. *p < 0.001 versus control.