title: Dehydrocostus lactone enhances tumor necrosis factor-alpha-induced apoptosis of human leukemia HL-60 cells.
abstract: Sesquiterpene lactones have raised considerable interest because of their ability to block the activation of nuclear transcription factor-kappaB (NF-kappaB). NF-kappaB plays an important role in the resistance of cancer cells to the induction of apoptosis by anticancer drugs and tumor necrosis factor-alpha (TNF-alpha). Pharmacological inhibition of NF-kappaB offers the promise of enhancing the efficacy of anticancer therapies. Here, we demonstrate that dehydrocostus lactone (DL), the major sesquiterpene lactone isolated from the roots of Saussurea lappa, inhibits NF-kappaB activation by preventing TNF-alpha-induced degradation and phosphorylation of its inhibitory protein I-kappaB alpha in human leukemia HL-60 cells and that DL renders HL-60 cells susceptible to TNF-alpha-induced apoptosis by enhancing caspase-8 and caspase-3 activities.
authors.affiliation: Department of Microbiology and Immunology, School of Medicine, Wonkwang University, Iksan, Chonbuk, South Korea.
authors.forename: G S
authors.initials: GS
authors.lastname: Oh
authors.forename: H O
authors.initials: HO
authors.lastname: Pae
authors.forename: H T
authors.initials: HT
authors.lastname: Chung
authors.forename: J W
authors.initials: JW
authors.lastname: Kwon
authors.forename: J H
authors.initials: JH
authors.lastname: Lee
authors.forename: T O
authors.initials: TO
authors.lastname: Kwon
authors.forename: S Y
authors.initials: SY
authors.lastname: Kwon
authors.forename: B H
authors.initials: BH
authors.lastname: Chon
authors.forename: Young Gab
authors.initials: YG
authors.lastname: Yun
mesh_terms: D000970:Antineoplastic Agents / Q000008:administration & dosage / Q000302:isolation & purification; D017209:Apoptosis / Q000187:drug effects*; D053148:Caspase 3; D053181:Caspase 8; D020169:Caspases / Q000378:metabolism; D004357:Drug Synergism; D018922:HL-60 Cells; D006801:Humans; D007783:Lactones / Q000008:administration & dosage* / Q000302:isolation & purification; D016328:NF-kappa B / Q000378:metabolism; D009363:Neoplasm Proteins / Q000096:biosynthesis; D008517:Phytotherapy; D030441:Saussurea / Q000737:chemistry; D012717:Sesquiterpenes / Q000008:administration & dosage* / Q000302:isolation & purification; D014409:Tumor Necrosis Factor-alpha / Q000008:administration & dosage*
chemical_list: D000970:Antineoplastic Agents; D007783:Lactones; D016328:NF-kappa B; D009363:Neoplasm Proteins; D012717:Sesquiterpenes; D014409:Tumor Necrosis Factor-alpha; C083030:dehydrocostus lactone; C505407:CASP3 protein, human; C505530:CASP8 protein, human; D053148:Caspase 3; D053181:Caspase 8; D020169:Caspases