Figure 4. Modulation of the SOD activity in NGF-PC12 differenciated cells by HX, HY and HZ.

Huprines were added alone or concomitantly with MEC (100 µM) to the culture 48 h prior to H₂O₂ addition. Then, cells were incubated with 200 µM H₂O₂ for 2 h. SOD activity was measured using a SOD activity assay from Fluka. At least three independent experiments were carried out in triplicate. The data are means ± s.e.m. expressed as percentage of control value. *p<0.05 compared with H₂O₂ group (Dunnett's test).