Cell morphology (A–F) and cell viability as measured by the MTT assay (G).

<p>NSCs at the second passage were seeded on poly-L-lysine-coated culture plates and grouped for the following treatments: (A) Normal control group without any treatment; (B) STZ group treated with STZ for four hours; (C) H₂O₂ control group treated with H₂O₂ for four hours; (D) Catalase+STZ group treated with catalase for twelve hours followed by four-hour incubation with STZ; (E) Salidroside+STZ group treated with salidroside for twelve hours followed by four-hour incubation with STZ; (F) Salidroside blank group treated with salidroside for twelve hours. Values are expressed as mean±SD. ^a<i>p</i><0.05 compared with the normal control group; ^b<i>p</i><0.05 compared with the STZ group.