Effects of high doses of theophylline on memory acquisition.
Intraperitoneal (IP) injection of high doses of theophylline decreased memory acquisition dose dependently. Low but not high doses of the dopamine receptor D2 antagonist sulpiride and the dopamine D1 receptor antagonist SCH 23390 decreased the theophylline response. Pimozide and the beta-adrenoreceptor propranolol also decreased the drug response. The anti-muscarinic agent atropine, the alpha-adrenoceptor phenoxybenzamine and the 5-HT antagonist metergoline did not affect the response induced by theophylline. It is concluded that dopamine and beta-adrenergic receptor mechanisms may be involved in the theophylline-induced attenuation of memory acquisition.
Zarrindast
M R
MR
Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Iran.
Jamali-Raeufy
N
N
Shafaghi
B
B
D018674:Adrenergic Antagonists / Q000494:pharmacology; D000818:Animals; D001285:Atropine / Q000494:pharmacology; D001552:Benzazepines / Q000494:pharmacology; D003213:Conditioning, Psychological / Q000187:drug effects*; D018492:Dopamine Antagonists / Q000494:pharmacology; D004347:Drug Interactions; D008297:Male; D008568:Memory / Q000187:drug effects*; D008711:Metergoline / Q000494:pharmacology; D051379:Mice; D018727:Muscarinic Antagonists / Q000494:pharmacology; D010643:Phenoxybenzamine / Q000494:pharmacology; D010726:Phosphodiesterase Inhibitors / Q000494:pharmacology*; D010868:Pimozide / Q000494:pharmacology; D011433:Propranolol / Q000494:pharmacology; D012702:Serotonin Antagonists / Q000494:pharmacology; D013469:Sulpiride / Q000494:pharmacology; D013806:Theophylline / Q000008:administration & dosage / Q000494:pharmacology*
D018674:Adrenergic Antagonists; D001552:Benzazepines; D018492:Dopamine Antagonists; D018727:Muscarinic Antagonists; D010726:Phosphodiesterase Inhibitors; D012702:Serotonin Antagonists; D010643:Phenoxybenzamine; D008711:Metergoline; D010868:Pimozide; D001285:Atropine; D013469:Sulpiride; D011433:Propranolol; D013806:Theophylline