Figure 5From: mGluR5 positive modulators both potentiate activation and restore inhibition in NMDA receptors by PKC dependent pathwayEffects of phorbol ester on NMDA receptor activation and suppression. Pretreatment of hippocampal slices with PMA (1 μM, a PKC activator) potentiating NMDA-induced field potentials (a, b) and prevented ketamine (a, 10 μM)- or D-APV (b, 50 μM)-evoked NMDA receptor blockade. Pretreatment of hippocampal slices with 4α-PDD (1 μM, inactive phorbol ester) did not affect NMDA-elicited field potentials (c, d) and ketamine (c, 10 μM)- or D-APV (d, 50 μM)-induced NMDA receptor blockade. All values are expressed as the mean ± S.E.M. (n = 6). Data were statistically analyzed by one-way ANOVA followed by a Student-Newman-Keuls post-hoc test. #p < 0.05 as compared with the NMDA groups. *p < 0.05 as compared with the NMDA plus ketamine or D-APV groups.Back to article page