Percentage of [35S]GTPγS
stimulation by increasing concentrations of (+)BW373U86 or DPDPE
pretreated with either vehicle (sterile water) or 10 nM NTI compared with
basal [35S]GTPγS binding in
the caudate putamen of coronal brain slices from naive rats.
EC50values were approximately 1.1 nM, 0.92
μM, 0.49 μM, and
undetermined for vehicle NTI with (+)BW373U86 (•),
10 nM NTI with (+)BW373U86 (○), vehicle NTI with
DPDPE (▪), and 10 nM NTI with DPDPE (□),
respectively.