Figure 2

Lipid peroxidation represented by MDA concentration in AR42J cells. Control untreated cells, cells exposed to 20 μM H₂O₂ for 15 min or to 100 μM nicotine for 3 min were lysed after treatments and the lysates were used in an MDA-586 Assay (Oxis Research, Portland, OR). The values are expressed as μM/mg protein in y-axis. The vertical bar represents treatments with H₂O₂ or nicotine, N = 5, *, P < 0.05, significantly different from the uncxposed control.