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  • Title: Influence of adenosine receptor agonists on benzodiazepine withdrawal signs in mice.
    Author: Listos J, Malec D, Fidecka S.
    Journal: Eur J Pharmacol; 2005 Oct 31; 523(1-3):71-8. PubMed ID: 16226742.
    Abstract:
    The involvement of adenosine receptor agonists in benzodiazepine withdrawal signs was evaluated as the seizure susceptibility of mice. The concomitant administration of subthreshold dose of pentetrazole (55.0 or 60.0 mg/kg, s.c.) with flumazenil (10.0 mg/kg, i.p.) in mice chronically treated with temazepam or diazepam induced the appearance of withdrawal signs: clonic seizures, tonic convulsions and death episodes. The administration of the selective A1 (CPA-N6-cyclopentyladenosine), A2A (CGS 21680-2-p-(2-carboxyethyl)phenethylamino-5'-N-ethylcarboxamidoadenosine hydrochloride) and the non-selective A1/A2A (NECA-5'-N-ethylcarboxamidoadenosine) adenosine receptor agonists (i.p.) evoked the significant attenuation of benzodiazepine withdrawal signs, and these effects were more expressed in temazepam- than in diazepam-dependent mice. CPA has shown the most apparent and dose-dependent attenuating effect. The results confirm that adenosine A1 and A2A receptors are involved in benzodiazepine withdrawal signs, and adenosine A1 receptor plays a predominant role in this phenomenon.
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