title: A serotonin agonist-antagonist reversible effect on Na+-K+-ATPase activity in the developing rat brain.
abstract: In brain of adult and developing rats the Na+-K+-adenosine triphosphatase (Na+-K+-ATPase) system seems to react to serotonin (5-HT) changes induced pharmacologically. A 5-HT agonist (quipazine) elicits a response of the enzyme activity in the cerebral cortex in vivo, which is neutralized with a 5-HT antagonist (methysergide). This effect was observed from day 21 to adulthood. Also in a state of 5-HT receptor hypersensitivity (rats treated early with 5,6-dihydroxytryptamine), the response of Na+-K+-ATPase to the 5-HT agonist was higher than without neurotoxic lesion of 5-HT paths. These data suggest an involvement of the Na+-K+-ATPase system in 5-HT receptor sensitivity in the rat brain.
mesh_terms: D015115:5,6-Dihydroxytryptamine / Q000494:pharmacology; D000375:Aging; D000818:Animals; D002540:Cerebral Cortex / Q000187:drug effects* / Q000201:enzymology; D004305:Dose-Response Relationship, Drug; D008297:Male; D008784:Methysergide / Q000494:pharmacology*; D011804:Quinolines / Q000494:pharmacology*; D011814:Quipazine / Q000031:analogs & derivatives / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D011985:Receptors, Serotonin / Q000187:drug effects*; D000254:Sodium-Potassium-Exchanging ATPase / Q000378:metabolism*
chemical_list: D011804:Quinolines; D011985:Receptors, Serotonin; D011814:Quipazine; D000254:Sodium-Potassium-Exchanging ATPase; D015115:5,6-Dihydroxytryptamine; D008784:Methysergide