title: Aldisine alkaloids from the Philippine sponge Stylissa massa are potent inhibitors of mitogen-activated protein kinase kinase-1 (MEK-1).
abstract: Raf/MEK-1/MAPK cascade inhibitor activity-directed fractionation of the sponge Stylissa massa afforded eight known alkaloids: aldisine (1), 2-bromoaldisine (2), 10Z-debromohymenialdisine (3), 10E-hymenialdisine (4), 10Z-hymenialdisine (5), hymenin (6), oroidin (7), and 4,5-dibromopyrrole-2-carbonamide (8). Both 4 and 5 showed significant enzyme inhibitory activity (IC(50) 3 and 6 nM, respectively). Secondary assays identified these compounds as potent MEK-1 inhibitors. Compounds 4 and 5 also inhibited the growth of human tumor LoVo cells.
authors.affiliation: Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah 84112, USA.
authors.forename: Deniz
authors.initials: D
authors.lastname: Tasdemir
authors.forename: Robert
authors.initials: R
authors.lastname: Mallon
authors.forename: Michael
authors.initials: M
authors.lastname: Greenstein
authors.forename: Larry R
authors.initials: LR
authors.lastname: Feldberg
authors.forename: Steven C
authors.initials: SC
authors.lastname: Kim
authors.forename: Karen
authors.initials: K
authors.lastname: Collins
authors.forename: Donald
authors.initials: D
authors.lastname: Wojciechowicz
authors.forename: Gina C
authors.initials: GC
authors.lastname: Mangalindan
authors.forename: Gisela P
authors.initials: GP
authors.lastname: Concepción
authors.forename: Mary Kay
authors.initials: MK
authors.lastname: Harper
authors.forename: Chris M
authors.initials: CM
authors.lastname: Ireland
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000302:isolation & purification / Q000494:pharmacology*; D001381:Azepines / Q000302:isolation & purification / Q000494:pharmacology*; D004354:Drug Screening Assays, Antitumor; D004791:Enzyme Inhibitors / Q000302:isolation & purification / Q000494:pharmacology*; D004797:Enzyme-Linked Immunosorbent Assay; D006801:Humans; D048369:MAP Kinase Kinase 1; D020929:Mitogen-Activated Protein Kinase Kinases / Q000037:antagonists & inhibitors*; D010679:Philippines; D010766:Phosphorylation; D011161:Porifera / Q000737:chemistry*; D017346:Protein Serine-Threonine Kinases / Q000037:antagonists & inhibitors*; D011758:Pyrroles / Q000302:isolation & purification / Q000494:pharmacology*; D013329:Structure-Activity Relationship; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D001381:Azepines; D004791:Enzyme Inhibitors; D011758:Pyrroles; C107079:hymenialdisine; D017346:Protein Serine-Threonine Kinases; D048369:MAP Kinase Kinase 1; C482125:MAP2K1 protein, human; D020929:Mitogen-Activated Protein Kinase Kinases