title: Lack of effect of 1-methylisoguanosine on sleep in rats.
abstract: The dose-response effects of intracerebroventricular (i.c.v.) administration of 1-methylisoguanosine (MIG) on sleep in rats were examined. Not even the largest dose (100 nmol/rat) of 1-methylisoguanosine produced significant hypnotic effects, whereas doses of 10 and 100 nmol/rat suppressed rapid eye movement sleep in rats. The only statistically significant effect of 1-methylisoguanosine on sleep latencies was an increase in the latency of S2 after intracerebroventricular administration of 100 nmol/rat of the drug. These effects of 1-methylisoguanosine on sleep were unlike those of both adenosine and the benzodiazepines, suggesting that, contrary to earlier speculations, 1-methylisoguanosine does not interact with central adenosine or benzodiazepine receptors.
mesh_terms: D000241:Adenosine / Q000494:pharmacology; D000818:Animals; D004305:Dose-Response Relationship, Drug; D004569:Electroencephalography; D004576:Electromyography; D006151:Guanosine / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000494:pharmacology; D007276:Injections, Intraventricular; D008297:Male; D051381:Rats; D011919:Rats, Inbred Strains; D012890:Sleep / Q000187:drug effects*; D012895:Sleep, REM / Q000187:drug effects
chemical_list: D006151:Guanosine; C022591:doridosine; D000241:Adenosine