“This suggests that SP may act like cocaine in its absence, and may be an endogenous trigger for the reward and behaviors associated with cocaine.”
“To address the question of whether SP serves as an endogenous mediator producing cocaine‐like effects that are known to be D1‐receptor‐mediated, we tested the hypothesis that the effects of SP and cocaine on excitatory postsynaptic currents (EPSCs) in the NAc occlude one another.”
“We report here that SP and SP5–11 actions occlude the effect of cocaine and vice versa.”