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  • Title: Intrastriatal injection of cannabinoid receptor agonists induced turning behavior in mice.
    Author: Souilhac J, Poncelet M, Rinaldi-Carmona M, Le Fur G, Soubrié P.
    Journal: Pharmacol Biochem Behav; 1995 May; 51(1):3-7. PubMed ID: 7617730.
    Abstract:
    When injected unilaterally into the mouse striatum, cannabinoid agonists such as Win 55212-2 (1-100 ng/mouse), CP 55940 (0.1-50 ng/mouse), and anandamide (0.5-50 ng/mouse), the putative endogenous ligand of CB1 receptor, dose-dependently induced turning behavior. SR 141716A [N-(piperidin-1-yl)-5-(4-chlorophenyl)-1-(2,4-dichlorophenyl)-4-me thyl-1H- pyrazole-3-carboxamide hydrochloride], the selective antagonist of CB1 receptor, antagonized the three cannabinoid receptor agonists-induced turning with similar ED50s (0.13-0.15 mg/kg, IP). Spiroperidol (a D2 receptor blocker), (+)-SCH 23390 (a D1 receptor blocker), or prior 6-OHDA lesions of the striatum blocked Win 55212-2- and CP 55940-induced turning, thus suggesting the involvement of DA transmission in cannabinoid-induced turning. Taken together, these findings reinforce the notion of a cannabinoid receptor-mediated control of nigrostriatal function.
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