Journal: Journal of Neuroscience
Article Title: Repeated Amphetamine Exposure Disrupts Dopaminergic Modulation of Amygdala-Prefrontal Circuitry and Cognitive/Emotional Functioning
doi: 10.1523/jneurosci.1810-11.2011
Figure Lengend Snippet: Figure 6. Changes in BLA-evoked firing induced by DA agonists and VTA stimulation. Left panelsrepresentmean SEMevokedfiringprobabilityunderbaselineconditions(whitebars) and after treatment with DA agonists/VTA stimulation (gray bars); p 0.05, difference relative to baseline. Right panels display the proportion of neurons recorded from saline- and AMPH-treated rats in which BLA-evoked firing was attenuated by these treatments. A, Treat- mentwithAMPH(0.5mg/kg,i.v.)attenuatesBLA-evokedfiringincontrols(n 9cells,9rats), but this effect was not statistically reliable in rats receiving repeated AMPH treatments (n 8 cells, 8 rats). B, Treatment with the D1 receptor agonist SKF81297 (0.5 mg/kg, i.v.) also atten- uated BLA-evoked firing in control rats but not in AMPH-treated rats suggesting that these treatments induce a disruption in D1 receptor function (n 6 cells, 6 rats per group). C, Sup- pression of evoked-firing induced by VTA burst stimulation did not differ between saline- treated (n 6 cells, 4 rats) and AMPH-treated (n 7 cells, 7 rats) animals.
Article Snippet: In addition, we tested the effects of the selective D2 agonist bromocriptine (0.5 mg/kg; Sigma-Aldrich) and the selective D4 agonist PD 168,077 (N-[[4-(2cyanophenyl)piperazin-1-yl]methyl]-3-methylbenzamide) (1.0 mg/kg; Tocris Biosciences) on BLA-evoked inhibition, and the selective D1 receptor agonist SKF81297 (6-chloro-2,3,4,5-tetrahydro-1-phenyl-1 H3-benzazepine hydrobromide) (0.5 mg/kg; Tocris Biosciences) on BLAevoked excitatory responses.
Techniques: Saline, Control, Disruption