Fig. 2.
Nicotine-induced (0.5 mg/kg) conditioned place preference is absent in CB2 (−/−) mice. Low dose nicotine (0.1 mg/kg) does not produce place preference in wild-type or CB2 (−/−) mice. Data are depicted as mean±SEM, n=7–12 mice per group; ***p<0.001 vs saline