title: Oligopeptides interfering with calcium channels inhibit prolactin and growth hormone release by cultured anterior pituitary cells of the rat.
abstract: A number of oligopeptides, protected at their N termini and possessing an aldehyde residue at their C terminal amino acids, are able to inhibit 45Ca2+ influx into anterior pituitary cells grown in monolayer culture and depolarized with high extracellular potassium concentration. In addition, the same oligopeptides interfere with hormone release, especially with that produced by lactotrophs. Our findings imply that oligopeptides may represent a new class of calcium channel ligands, and the pituitary cells are sensitive targets for them.
authors.affiliation: Heim Pál Pediatric Hospital, Hungarian Academy of Sciences, Budapest.
authors.forename: I
authors.initials: I
authors.lastname: Nagy
authors.forename: G B
authors.initials: GB
authors.lastname: Makara
authors.forename: V
authors.initials: V
authors.lastname: Garamvölgyi
authors.forename: S
authors.initials: S
authors.lastname: Bajusz
authors.forename: E
authors.initials: E
authors.lastname: Széll
authors.forename: G
authors.initials: G
authors.lastname: Rappay
mesh_terms: D000818:Animals; D002118:Calcium / Q000378:metabolism; D002121:Calcium Channel Blockers / Q000494:pharmacology; D015220:Calcium Channels / Q000187:drug effects*; D002478:Cells, Cultured; D005260:Female; D013006:Growth Hormone / Q000378:metabolism*; D009842:Oligopeptides / Q000494:pharmacology*; D010903:Pituitary Gland, Anterior / Q000187:drug effects* / Q000378:metabolism; D011388:Prolactin / Q000378:metabolism*; D051381:Rats
chemical_list: D002121:Calcium Channel Blockers; D015220:Calcium Channels; D009842:Oligopeptides; D011388:Prolactin; D013006:Growth Hormone; D002118:Calcium