Amphetamine maintenance therapy during intermittent cocaine self-administration in rats attenuates psychomotor and dopamine sensitization and reduces addiction-like behavior.

Neuropsychopharmacology : Official Publication of the American College of Neuropsychopharmacology
Florence AllainAnne-Noël Samaha

Abstract

D-amphetamine maintenance therapy shows promise as a treatment for people with cocaine addiction. Preclinical studies using Long Access (LgA) cocaine self-administration procedures suggest D-amphetamine may act by preventing tolerance to cocaine's effects at the dopamine transporter (DAT). However, Intermittent Access (IntA) cocaine self-administration better reflects human patterns of use, is especially effective in promoting addiction-relevant behaviors, and instead of tolerance, produces psychomotor, incentive, and neural sensitization. We asked, therefore, how D-amphetamine maintenance during IntA influences cocaine use and cocaine's potency at the DAT. Male rats self-administered cocaine intermittently (5 min ON, 25 min OFF x10; 5-h/session) for 14 sessions, with or without concomitant D-amphetamine maintenance therapy during these 14 sessions (5 mg/kg/day via s.c. osmotic minipump). We then assessed responding for cocaine under a progressive ratio schedule, responding under extinction and cocaine-primed reinstatement of drug seeking. We also assessed the ability of cocaine to inhibit dopamine uptake in the nucleus accumbens core using fast scan cyclic voltammetry ex vivo. IntA cocaine self-administration produced psychomo...Continue Reading

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Citations

Aug 30, 2020·Neuropsychopharmacology : Official Publication of the American College of Neuropsychopharmacology·Emily M Black, Rodrigo A España
Apr 12, 2021·Neuroscience and Biobehavioral Reviews·Mi Young LeeChae Ha Yang
Apr 25, 2021·Trends in Neurosciences·Anne-Noël SamahaTerry E Robinson

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