Brain expression of AMPAR and NMDAR mRNAs in CPP-treated euthermics. Transcription expression of antisense (left half section) and sense (right half section) probes of GluR1 (A), GluR2 (B), NR1 (C) and NR2A (D) showed an heterogeneous distribution pattern for all brain regions of euthermic hamsters as observed in representative posterior brain regions. (E) The expression percentage (% ± s.e.m.) of GluR1 (black), GluR2 (black-white stripes), NR1 (white) and NR2A (grey) mRNAs of CPP-treated hamsters (n = 4) were compared to their controls (n = 4). Values were analyzed by a two-way ANOVA followed by Newman-Keul's Multiple Range Test when p < 0.05. *p < 0.05; **p < 0.01; ***p < 0.001. Abbreviations: Arc, arcuate hypothalamus nucleus; Ce, amygdala central nucleus; COR, cortex layer; GD, hippocampal dentate gyrus; Lat, amygdala lateral nucleus; Or-Py, oriens-pyramidalis layer of the hippocampus; VMN, ventromedial nucleus of the hypothalamus.