Figure 1.

Effect of LBP on H₂O₂-induced apoptosis. PC12 cells were incubated with (A) 0, 50, 100, 200 or 400 µM H₂O₂ or (B) 0, 125, 250, 500, 800 or 1,000 µg/ml LBP for 24 h. Cell viability was determined by MTT assay and the results are presented as folds of control. (C) PC12 cells were incubated with 400 µM H₂O₂ in the presence or absence of 125, 250 or 500 µg/ml LBP for 24 h. Cell viability was determined by MTT assay and the results are presented as folds of control. (D) Apoptosis was determined by TUNEL staining and the results are presented as folds of control. *P<0.05 vs. control; ^#P<0.05 vs. H₂O₂ treatment. LBP, Lycium barbarum polysaccharide.