Comparative potencies of calcium channel antagonists and antischizophrenic drugs on central and peripheral calcium channel binding sites.
Dihydropyridines are potent agents on [3H]nitrendipine binding sites in heart and brain membranes. Like the phenylalkylamines, they are slightly more active on heart than on brain [3H]nitrendipine binding sites. On the other hand, the diphenylalkylamines, the diphenylpiperazines and the antischizophrenic drugs of the diphenylbutylpiperdine type are more potent on brain [3H]nitrendipine binding sites. The findings suggest tissue heterogeneity of [3H]nitrendipine binding sites and the possible development of diphenylbutylpiperidine-diphenylbutylpiperazine analogues that could selectively act on brain calcium channel antagonist binding sites.
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D000818:Animals; D014150:Antipsychotic Agents / Q000494:pharmacology*; D001665:Binding Sites / Q000187:drug effects; D001667:Binding, Competitive / Q000187:drug effects; D002121:Calcium Channel Blockers / Q000494:pharmacology*; D002540:Cerebral Cortex / Q000378:metabolism; D066298:In Vitro Techniques; D007473:Ion Channels / Q000378:metabolism*; D008297:Male; D009206:Myocardium / Q000378:metabolism; D009543:Nifedipine / Q000031:analogs & derivatives / Q000378:metabolism; D009568:Nitrendipine; D051381:Rats; D011919:Rats, Inbred Strains
D014150:Antipsychotic Agents; D002121:Calcium Channel Blockers; D007473:Ion Channels; D009568:Nitrendipine; D009543:Nifedipine