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- W2079583442 abstract "The effect of adenosine A1 and A2 receptor agonists and antagonists was investigated on haloperidol-induced catalepsy in rats. Pretreatment (i.p.) with the non-selective adenosine receptor antagonist, theophylline, or the selective adenosine A2 receptor antagonist, 3,7-dimethyl-1-propargylxanthine (DMPX), significantly reversed haloperidol-induced catalepsy, whereas the selective adenosine A1 receptor antagonists, 8-phenyltheophylline and 8-cyclopentyl-1,3-dipropylxanthine produced no effect. Similar administration of the adenosine A2 receptor agonists, 5'-(N-cyclopropyl)-carboxamidoadenosine and 5'-N-ethylcarboxamidoadenosine (NECA), and the mixed agonists with predominantly A1 site of action, N6-(2-phenylisopropyl) adenosine or 2-chloroadenosine, potentiated haloperidol-induced catalepsy. Higher doses of the adenosine agonists produced catalepsy when given alone. However, N6-cyclopentyladenosine, a highly selective adenosine A1 receptor agonist, was ineffective in these respects. The per se cataleptic effect of adenosine agonists was blocked by DMPX and the centrally acting anticholinergic agent, scopolamine. Scopolamine also attenuated the potentiation of haloperidol-induced catalepsy by adenosine agonists. Further, i.c.v. administration of NECA and DMPX produced a similar effect as that produced after their systemic administration. These findings demonstrate the differential influence of adenosine A1 and A2 receptors on haloperidol-induced catalepsy and support the hypothesis that the functional interaction between adenosine and dopamine mechanisms might occur through adenosine A2 receptors at the level of cholinergic neurons. The results suggest that adenosine A2, but not A1, receptor antagonists may be of potential use in the treatment of Parkinson's disease." @default.
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- W2079583442 date "1997-09-01" @default.
- W2079583442 modified "2023-09-25" @default.
- W2079583442 title "Adenosine A2 receptors modulate haloperidol-induced catalepsy in rats" @default.
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- W2079583442 doi "https://doi.org/10.1016/s0014-2999(97)83039-7" @default.
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