Figure 1.
Stress-potentiated reinstatement is CB1R-dependent. Data represent mean active lever responses (± SEM) during 2-h extinction and reinstatement tests. Stress-potentiated reinstatement is observed when rats are exposed to a stressor, 15 min intermittent electric footshock stress (EFS) followed immediately by a subthreshold dose of cocaine (COC, 2.5 mg/kg, i.p.; **p<.01, compared to reinstatement). Stress-potentiated reinstatement is blocked by pre-treatment with the CB1R antagonist AM251 (1 (n=6), 3 (n=6) mg/kg, i.p.) 30 min prior to the reinstatement test (#p<.05 compared to Veh/EFS/COC).
