Figure 3.
Galantamine (3 mg/kg; a) but not donepezil (2 mg/kg; b) blocks the reduction in extracellular glutamate caused by the local perfusion of kynurenine (2.5 µM; bar) in the PFC. Neither of the two drugs, injected i.p. (arrows), affected the de novo formation of KYNA from kynurenine. KYNA and glutamate were measured in the same microdialysates. Data are the mean ± standard error of the mean of four (a) and six (b) animals, respectively. a, b p<0.05 compared to the respective baseline values (one-way ANOVA)