Fig. 5

Effect of MPTP on assessment of cell viability in N2a cells for 24 h. a after 24 h their viability was measured using an MTT assay. b After an indicated treatment for 24 h, the cells were stained with FITC-conjugated Annexin-V and PI for flow cytometry analysis as described in “Methods” section. The percentages presented in each frame depicted the apoptotic cells. *p < 0.05, indicates significant difference compared to an untreated group of N2a