Abstract
The effects of adenosine A1 and A2 receptors on catalepsy were studied in mice. The adenosine agonists 5-N'-ethylcarboxamide-adenosine (NECA), N6-phenylisopropyladenosine (PIA) and N6-cyclohexyladenosine (CHA) induced dose dependent catalepsy. The A1 adenosine antagonist 8-phenyltheophylline (8-PT) potentiated catalepsy induced by NECA, R-PIA and CHA. However, theophylline did not potentiate but inhibited the responses induced by NECA, R-PIA and CHA. Neither 8-PT nor theophylline alone has any effect on catalepsy in mice. It is concluded that catalepsy induced by the adenosine agonists may be due to A2 receptor stimulation and that the A1 antagonism may potentiate the response.
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