title: Stimulation of cyclic AMP formation by pituitary adenylate cyclase-activating polypeptide is attenuated by glutamate in rat brain slices.
abstract: In rat hippocampal slices, pituitary adenylate cyclase-activating polypeptide-38 (PACAP-38) stimulated cyclic AMP formation in dose- and time-dependent manners. The PACAP-38 action was dose-dependently attenuated by L-glutamate in the hippocampus; L-glutamate at the concentration of 1 mM attenuated PACAP-38-stimulated cyclic AMP formation by approximately 30%. The inhibitory effect of L-glutamate is also observed in rat cerebellar slices. In contrast, the inhibitory effect of a prostanoid EP3-receptor agonist on PACAP-38-stimulated cyclic AMP formation was brain region-specific; the inhibitory action was observed in the cerebellum but not in the hippocampus.
authors.affiliation: Department of Pharmacology, Faculty of Pharmaceutical Sciences, Osaka University, Suita, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Kondo
authors.forename: H
authors.initials: H
authors.lastname: Hashimoto
authors.forename: K
authors.initials: K
authors.lastname: Sakata
authors.forename: H
authors.initials: H
authors.lastname: Saga
authors.forename: J
authors.initials: J
authors.lastname: Kitanaka
authors.forename: A
authors.initials: A
authors.lastname: Baba
mesh_terms: D000262:Adenylyl Cyclases / Q000378:metabolism*; D000527:Alprostadil / Q000031:analogs & derivatives / Q000494:pharmacology; D000818:Animals; D002531:Cerebellum / Q000187:drug effects / Q000378:metabolism; D000242:Cyclic AMP / Q000096:biosynthesis* / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D004789:Enzyme Activation / Q000187:drug effects; D018698:Glutamic Acid / Q000494:pharmacology*; D006624:Hippocampus / Q000187:drug effects / Q000378:metabolism; D066298:In Vitro Techniques; D009479:Neuropeptides / Q000494:pharmacology*; D018377:Neurotransmitter Agents / Q000494:pharmacology*; D051219:Pituitary Adenylate Cyclase-Activating Polypeptide; D010902:Pituitary Gland / Q000187:drug effects / Q000201:enzymology*; D011863:Radioimmunoassay; D051381:Rats; D017208:Rats, Wistar; D018078:Receptors, Prostaglandin E / Q000037:antagonists & inhibitors
chemical_list: C495403:Adcyap1 protein, rat; D009479:Neuropeptides; D018377:Neurotransmitter Agents; D051219:Pituitary Adenylate Cyclase-Activating Polypeptide; D018078:Receptors, Prostaglandin E; D018698:Glutamic Acid; C032405:11-deoxy-16-phenoxy-17,18,19,20-tetranorprostaglandin E1; D000242:Cyclic AMP; D000262:Adenylyl Cyclases; D000527:Alprostadil