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Protective effects of Li on MPP+-treated astrocytes. Astrocytes were pretreated with Li (10 mM) for 1 h, after which they were treated with MPP+ (400 or 800 µM) for 24 h. Cell viability was determined using MTT assays and the absorbance was measured using a microplate reader. Data are presented as the mean ± standard error of the mean of triplicate experiments. *P<0.05 vs. the control group. MPP+, 1-methyl-4-phenylpyridinium; Li, lithium; Con, control.
