title: The dopamine-somatostatin chimeric compound BIM-23A760 exerts antiproliferative and cytotoxic effects in human non-functioning pituitary tumors by activating ERK1/2 and p38 pathways.
abstract: The study investigated the effects of the dopamine-somatostatin chimeric compound BIM-23A760 on cell proliferation and apoptosis in cultured cells from human non-functioning pituitary tumors (NFPTs). Both BIM-23A760 and the dopaminergic agonist BIM-53097 induced a significant inhibition of cell proliferation associated with increased p27 expression, together with a significant increase in caspase-3 activity. Conversely, null or marginal effects were elicited by somatostatin analogs. Moreover, BIM-23A760 and BIM-53097 induced ERK1/2 and p38 phosphorylation and the blockade of these pathways prevented both the antiproliferative and the pro-apoptotic effects of these drugs. In conclusions the chimeric compound BIM-23A760 is able to exert cytostatic and cytotoxic effects in NFPTs, these phenomena being mainly mediated by DR2D and involving ERK1/2 and p38 pathways activation.
authors.affiliation: Dept. of Medical Sciences, University of Milan, Fondazione IRCCS Ospedale Maggiore Policlinico, Milano, Italy.
authors.forename: Erika
authors.initials: E
authors.lastname: Peverelli
authors.forename: Luca
authors.initials: L
authors.lastname: Olgiati
authors.forename: Marco
authors.initials: M
authors.lastname: Locatelli
authors.forename: Paolo
authors.initials: P
authors.lastname: Magni
authors.forename: Marco Faustini
authors.initials: MF
authors.lastname: Fustini
authors.forename: Giorgio
authors.initials: G
authors.lastname: Frank
authors.forename: Giovanna
authors.initials: G
authors.lastname: Mantovani
authors.forename: Paolo
authors.initials: P
authors.lastname: Beck-Peccoz
authors.forename: Anna
authors.initials: A
authors.lastname: Spada
authors.forename: Andrea
authors.initials: A
authors.lastname: Lania
mesh_terms: D000328:Adult; D000368:Aged; D000970:Antineoplastic Agents / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects*; D053148:Caspase 3 / Q000378:metabolism; D049109:Cell Proliferation / Q000187:drug effects*; D050760:Cyclin-Dependent Kinase Inhibitor p27; D004298:Dopamine / Q000031:analogs & derivatives* / Q000494:pharmacology; D018491:Dopamine Agonists / Q000494:pharmacology; D004789:Enzyme Activation; D005260:Female; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins / Q000378:metabolism; D020935:MAP Kinase Signaling System / Q000187:drug effects*; D008297:Male; D008875:Middle Aged; D048052:Mitogen-Activated Protein Kinase 3 / Q000037:antagonists & inhibitors / Q000378:metabolism*; D010766:Phosphorylation; D010911:Pituitary Neoplasms / Q000201:enzymology* / Q000473:pathology; D047428:Protein Kinase Inhibitors / Q000494:pharmacology; D017448:Receptors, Dopamine D2 / Q000819:agonists / Q000378:metabolism; D017481:Receptors, Somatostatin / Q000187:drug effects / Q000378:metabolism; D013004:Somatostatin / Q000031:analogs & derivatives* / Q000494:pharmacology; D014407:Tumor Cells, Cultured; D048051:p38 Mitogen-Activated Protein Kinases / Q000037:antagonists & inhibitors / Q000378:metabolism*
chemical_list: D000970:Antineoplastic Agents; C436291:CDKN1B protein, human; D018491:Dopamine Agonists; D047908:Intracellular Signaling Peptides and Proteins; D047428:Protein Kinase Inhibitors; D017448:Receptors, Dopamine D2; D017481:Receptors, Somatostatin; D050760:Cyclin-Dependent Kinase Inhibitor p27; D013004:Somatostatin; D048052:Mitogen-Activated Protein Kinase 3; D048051:p38 Mitogen-Activated Protein Kinases; C505407:CASP3 protein, human; D053148:Caspase 3; C531242:TBR-760; D004298:Dopamine