title: Neurotropic effects of the optical isomers of the selective adenosine cyclic 3',5'-monophosphate phosphodiesterase inhibitor rolipram in rats in-vivo.
abstract: The efficacy of the selective adenosine cyclic 3',5'-monophosphate (cAMP) phosphodiesterase (PDE) inhibitor (+/-)-rolipram and its optical isomers (0.006 to 25 mg kg-1) in inducing characteristic behavioural changes like hypothermia, hypoactivity, forepaw shaking, grooming and head twitches in rats has been examined. (+)-Rolipram was found some 15 times less potent than the racemate suggesting a stereoselective interaction with a rat brain cAMP phosphodiesterase isoenzyme. Following their intracerebral administration, the stereoisomers also demonstrated their unusual potency ratio. These findings suggested that (+)-rolipram is a less potent neurotropic PDE inhibitor in-vivo than its (-)-enantiomer.
mesh_terms: D015105:3',5'-Cyclic-AMP Phosphodiesterases / Q000037:antagonists & inhibitors*; D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects; D001831:Body Temperature / Q000187:drug effects; D001921:Brain / Q000187:drug effects*; D007276:Injections, Intraventricular; D008297:Male; D009043:Motor Activity / Q000187:drug effects; D011760:Pyrrolidinones / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D020889:Rolipram; D013237:Stereoisomerism
chemical_list: D011760:Pyrrolidinones; D015105:3',5'-Cyclic-AMP Phosphodiesterases; D020889:Rolipram