title: 2-methoxy-1,4-naphthoquinone isolated from Impatiens balsamina in a screening program for activity to inhibit Wnt signaling.
abstract: A screening study using a luciferase assay to identify natural products which inhibit Wnt signaling was carried out. The bioassay-guided fractionation of aerial parts of a plant, Impatiens balsamina, led to the isolation of 2-methoxy-1,4-naphthoquinone (1) as an active compound. Compound 1 inhibited the TCF/β-catenin (TOP) transcriptional activity (IC(50) 2.9 µM), while it decreased the transcriptional activity of FOP (mutated TCF-binding site)-transfected cells at >5 µM.
authors.affiliation: Graduate School of Pharmaceutical Sciences, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan.
authors.forename: Naomi
authors.initials: N
authors.lastname: Mori
authors.forename: Kazufumi
authors.initials: K
authors.lastname: Toume
authors.forename: Midori A
authors.initials: MA
authors.lastname: Arai
authors.forename: Takashi
authors.initials: T
authors.lastname: Koyano
authors.forename: Thaworn
authors.initials: T
authors.lastname: Kowithayakorn
authors.forename: Masami
authors.initials: M
authors.lastname: Ishibashi
mesh_terms: D002460:Cell Line; D006801:Humans; D029069:Impatiens / Q000737:chemistry*; D020128:Inhibitory Concentration 50; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009285:Naphthoquinones / Q000737:chemistry* / Q000494:pharmacology*; D015398:Signal Transduction / Q000187:drug effects*; D051153:Wnt Proteins / Q000378:metabolism*; D051176:beta Catenin
chemical_list: D009285:Naphthoquinones; D051153:Wnt Proteins; D051176:beta Catenin; C096118:2-methoxy-1,4-naphthoquinone