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Microdialysis study of extracellular striatal DA levels in mice injected intraperitoneally with MA (A) and locally perfused with CPCCOEt (B), SIB-1757 (C), or MPEP (D) (all at 100 μm), since the beginning of the perfusion, or injected with MPEP (E) (10 mg/kg, i.p.) 20 min before MA. Thevertical arrows indicate the time of injection of the drugs. Values are means ± SEM of five determinations. *p < 0.05 (one-way ANOVA + Dunnett's test) if compared with the respective values at 20 min.
