European journal of pharmacology · 2008
Suppression of dopamine-related side effects of morphine by aripiprazole, a dopamine system stabilizer.
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Narita Minoru, Takei Daisuke, Shiokawa Mitsuru, Tsurukawa Yuri, Matsushima Yuki, Nakamura Atsushi, Takagi Shigemi, Asato Megumi, Ikegami Daigo, Narita Michiko, Amano Taku, Niikura Keiichi, Hashimoto Keisuke, Kuzumaki Naoko, Suzuki Tsutomu
Аннотация
Dopamine receptor antagonists are commonly used to counter the adverse effects of opioids such as hallucinations, delusions and emesis. However, most of these agents themselves have side effects, including extrapyramidal symptoms. Here, we investigated the effect of the dopamine system stabilizer aripiprazole on morphine-induced dopamine-related actions in mice. Morphine-induced hyperlocomotion and reward were significantly suppressed by either the dopamine receptor antagonist prochlorperazine or aripiprazole. Catalepsy was observed with a high dose of prochlorperazine, but not with an even higher dose of aripiprazole. The increased level of dialysate dopamine in the nucleus accumbens stimulated by morphine was significantly decreased by pretreatment with aripiprazole. These results suggest that the co-administration of aripiprazole may be useful for reducing the severity of morphine-induced dopamine-related side effects.