Mizoguchi et al., Mol Pharmacol 2004
:
Both the dopamine D1 receptor antagonist R- ( + ) -7-chloro-8-hydroxy-3-methyl-1-phenyl-2,3,4,5-tetrahydro-1H-3-benzazepine ( SCH23390 ) and the D2 receptor antagonist raclopride inhibited the expression of CPP as well as the activation of ERK1/2 in MAP treated CPP ( + ) animals, when they were injected before the CPP test
Li et al., Neurosci Lett 2008
:
However, the roles of ERK in the morphine paired conditioned place preference (CPP) are not clear