Abstract
CART (cocaine and amphetamine regulated transcript) peptide functions as both a neurotransmitter and a hormone and is found both in the central nervous system (CNS) and in the periphery. CART peptide in the nucleus accumbens (NAc) has been implicated in the regulation of cocaine-dopamine-mediated locomotion and self-administration, and amphetamine-mediated locomotion and behavior. However, there are no studies on the effect of systemic administration of CART peptide on cocaine and amphetamine-mediated locomotion. In this study, we tested if the systemic administration of CART 55-102 by the intraperitoneal (ip) route has a functional effect on psychostimulant-mediated locomotion in rats as it does when given into the brain. We determined that ip CART 55-102 attenuates psychostimulant-mediated locomotion as it does when administered into the NAc and display a biphasic dose response curve.
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