Fig. 3

Expression and activity of endothelial and inducible nitric oxide synthase. a Expression of endothelial nitric oxide synthase (eNOS) and inducible nitric oxide synthase (iNOS) did not differ significantly among the three treatment groups. b However, eNOS activity was significantly lower and iNOS activity was higher in the PP group, compared with the PP-ABH and control groups. ^* P <0.05, ^** P <0.01, ^*** P <0.001