title: New cytotoxic bisindole alkaloids with protein tyrosine kinase inhibitory activity from a myxomycete Lycogala epidendrum.
abstract: Two new bisindole alkaloids, 6-hydroxystaurosporinone (1) and 5,6-dihydroxyarcyriaflavin A (2) were isolated from field-collected fruit bodies of a myxomycete Lycogala epidendrum, along with eight known bisindoles (3-10). The structures of these new compounds were determined on the basis of spectroscopic data. Compounds 1 and 2 showed cytotoxicity against HeLa, Jurkat, and vincristine resistant KB/VJ300 cells, and compound 1, particularly, inhibited protein tyrosine kinase activity.
authors.affiliation: Graduate School of Pharmaceutical Sciences, Chiba University, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Hosoya
authors.forename: Yukinori
authors.initials: Y
authors.lastname: Yamamoto
authors.forename: Yoshimasa
authors.initials: Y
authors.lastname: Uehara
authors.forename: Masahiko
authors.initials: M
authors.lastname: Hayashi
authors.forename: Kanki
authors.initials: K
authors.lastname: Komiyama
authors.forename: Masami
authors.initials: M
authors.lastname: Ishibashi
mesh_terms: D000470:Alkaloids / Q000302:isolation & purification / Q000494:pharmacology*; D000818:Animals; D004791:Enzyme Inhibitors / Q000302:isolation & purification / Q000494:pharmacology*; D006367:HeLa Cells; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D051379:Mice; D009235:Myxomycetes / Q000737:chemistry*; D041681:NIH 3T3 Cells; D011505:Protein-Tyrosine Kinases / Q000037:antagonists & inhibitors*
chemical_list: D000470:Alkaloids; D004791:Enzyme Inhibitors; D011505:Protein-Tyrosine Kinases