title: Proteomic identification of anti-cancer proteins in luteolin-treated human hepatoma Huh-7 cells.
abstract: Luteolin has been shown to exhibit anti-cancer activity against several forms of cancers, including human hepatic cancers. Many in vitro studies have reported anti-oxidant effects of luteolin. Here, we demonstrate using ROS (reactive oxygen species) detection in the human hepatocellular carcinoma cell line, Huh-7, that anti-cancer action of luteolin are mediated through an increasing in intracellular ROS levels. To identify proteins potentially involved in this mechanism, a two-dimensional electrophoresis (2-DE)-based-proteomic approach was employed. Proteomic analysis revealed that several proteins were associated with the anti-cancer effects of luteolin. Interestingly, these proteins included peroxiredoxin 6 (PRDX6) and prohibitin (PHB), which are implicated in ROS metabolism and apoptosis. Western blot analyses confirmed the expression of these proteins in Huh-7 cells following luteolin application. On the basis of these results, we suggest that PRDX6 and PHB are key targets of luteolin that the mechanism of luteolin-induced apoptosis in Huh-7 cells is mediated through effects involving intracellular ROS.
authors.affiliation: Department of Biological Science, Gachon University of Medicine and Science, Yeonsu-dong, Yeonsu-gu, Incheon, Republic of Korea.
authors.forename: Dong Ryeol
authors.initials: DR
authors.lastname: Yoo
authors.forename: Yun Ho
authors.initials: YH
authors.lastname: Jang
authors.forename: Yeong Keul
authors.initials: YK
authors.lastname: Jeon
authors.forename: Ju Yeon
authors.initials: JY
authors.lastname: Kim
authors.forename: Won
authors.initials: W
authors.lastname: Jeon
authors.forename: Yeon Joo
authors.initials: YJ
authors.lastname: Choi
authors.forename: Myeong Jin
authors.initials: MJ
authors.lastname: Nam