title: Induction of apoptosis by a stilbene analog involves Bax translocation regulated by p38 MAPK and Akt.
abstract: trans-Stilbenes have been reported to induce cytochrome P450 1B1 (CYP1B1) inhibition and cell death, however, the molecular mechanisms of the effects are not fully understood. We report here that (1-(2-{3-[2-(2,4-dimethoxy-phenyl)-vinyl]-5-methoxy-phenoxy}ethyl)-1H-imidazole), a synthetic stilbene analog (SA) significantly suppressed TCDD-stimulated CYP1B1 mRNA expression. In HL-60 cells, SA induced apoptosis through activation of p38 MAPK and inactivation of Akt, which in turn activated Bad and mitochondrial death signaling pathway, as evidenced by Bax translocation and cytochrome c release. Expression of dominant negative p38 MAPK or constitutively active Akt significantly prevented cell death and mitochondrial Bax translocation, implicating that p38 MAPK and Akt signaling pathways play crucial roles in stilbene-induced apoptosis of HL-60 cells. These results suggest that SA induces apoptotic cell death as well as CYP1B1 inhibition and may thus be beneficial in cancer prevention.
authors.affiliation: College of Pharmacy, Chung-Ang University, Seoul, Korea.
authors.forename: Kwang Sup
authors.initials: KS
authors.lastname: So
authors.forename: Ji Eun
authors.initials: JE
authors.lastname: Oh
authors.forename: Jee Hye
authors.initials: JH
authors.lastname: Han
authors.forename: Hong Keun
authors.initials: HK
authors.lastname: Jung
authors.forename: Young Suk
authors.initials: YS
authors.lastname: Lee
authors.forename: Sang Hee
authors.initials: SH
authors.lastname: Kim
authors.forename: Young Jin
authors.initials: YJ
authors.lastname: Chun
authors.forename: Mie Young
authors.initials: MY
authors.lastname: Kim
mesh_terms: D016588:Anticarcinogenic Agents / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects*; D001189:Aryl Hydrocarbon Hydroxylases; D002470:Cell Survival / Q000187:drug effects; D065633:Cytochrome P-450 CYP1B1; D003577:Cytochrome P-450 Enzyme System / Q000096:biosynthesis / Q000235:genetics; D045304:Cytochromes c / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D004789:Enzyme Activation; D004794:Enzyme Repression; D018922:HL-60 Cells; D006801:Humans; D008928:Mitochondria / Q000187:drug effects* / Q000201:enzymology / Q000378:metabolism; D051058:Oncogene Protein v-akt / Q000235:genetics / Q000378:metabolism*; D000072317:Polychlorinated Dibenzodioxins / Q000494:pharmacology; D021381:Protein Transport; D012333:RNA, Messenger / Q000096:biosynthesis; D015398:Signal Transduction / Q000187:drug effects*; D013267:Stilbenes / Q000494:pharmacology*; D013997:Time Factors; D014162:Transfection; D051028:bcl-2-Associated X Protein / Q000378:metabolism*; D051025:bcl-Associated Death Protein / Q000378:metabolism; D048051:p38 Mitogen-Activated Protein Kinases / Q000235:genetics / Q000378:metabolism*
chemical_list: D016588:Anticarcinogenic Agents; C494819:BAD protein, human; C494826:BAX protein, human; D000072317:Polychlorinated Dibenzodioxins; D012333:RNA, Messenger; D013267:Stilbenes; D051028:bcl-2-Associated X Protein; D051025:bcl-Associated Death Protein; D045304:Cytochromes c; D003577:Cytochrome P-450 Enzyme System; D001189:Aryl Hydrocarbon Hydroxylases; C585496:CYP1B1 protein, human; D065633:Cytochrome P-450 CYP1B1; D051058:Oncogene Protein v-akt; D048051:p38 Mitogen-Activated Protein Kinases