Effects of the 5-HT1A partial agonists gepirone, ipsapirone and buspirone on local cerebral glucose utilization in the conscious rat.
The azospirones gepirone (10 mg/kg), ipsapirone (10 mg/kg) and buspirone (10 mg/kg) were examined for their effect on regional cerebral glucose utilization in conscious rats using quantitative 2-deoxy-glucose autoradiography. All three 5-HT1A partial agonists reduced glucose utilization in the hippocampus and dentate gyrus by 20-25% and increased glucose utilization by 38-65% in the lateral habenular nucleus; an important relay between striatal/limbic areas and the mid-brain raphe nuclei. The findings emphasize the potential importance of the hippocampus as a site of action for 5-HT1A receptor active drugs in vivo and also suggest that functional activity in the striatal/limbic-habenular-raphe pathway may be influenced by gepirone, ipsapirone and buspirone.
MRC Unit, Radcliffe Infirmary, Oxford, UK.
P M
PM
Grasby
T
T
Sharp
T
T
Allen
P A
PA
Kelly
D G
DG
Grahame-Smith
D000818:Animals; D014151:Anti-Anxiety Agents / Q000494:pharmacology*; D001345:Autoradiography; D001522:Behavior, Animal / Q000187:drug effects; D001794:Blood Pressure / Q000187:drug effects; D001831:Body Temperature / Q000187:drug effects; D001923:Brain Chemistry / Q000187:drug effects*; D002065:Buspirone / Q000494:pharmacology; D003847:Deoxyglucose; D005947:Glucose / Q000378:metabolism*; D008297:Male; D011743:Pyrimidines / Q000494:pharmacology; D051381:Rats; D011919:Rats, Inbred Strains
D014151:Anti-Anxiety Agents; D011743:Pyrimidines; C043077:ipsapirone; D003847:Deoxyglucose; D005947:Glucose; C039979:gepirone; D002065:Buspirone