title: Mechanisms of pseudolaric acid B-induced apoptosis in Bel-7402 cell lines.
abstract: Previous studies have shown that pseudolaric acid B (PB) would cause apoptosis in human tumor cell lines. However, the mechanisms of PB induced apoptosis are still unclear. In the present study, the mechanisms of PB induced apoptosis in the human hepatocellular carcinoma Bel-7402 cell line were investigated by measuring cell viability, rate of apoptosis, cell cycle, detecting DNA fragmentation, and measuring caspase-3 activation. The results indicated that PB inhibited Bel-7402 cell viability and induced cell death by causing DNA fragmentation, up regulating the early and late apoptotic rates, activating caspase-3 protein, and detaining the cell cycle in the G2/M phases. Additionally, PB-induced apoptosis was a dose- and time-dependent manner. These observations suggest that PB-induced apoptosis occurs through a caspase-dependent pathway and detains the cell cycle in the G2/M phase.
authors.affiliation: The State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences and Modern Research Center for Traditional Chinese Medicine, Peking University, Beijing 100083, China. mywu_1975@yahoo.com
authors.forename: Wan-Ying
authors.initials: WY
authors.lastname: Wu
authors.forename: Hong-Zhu
authors.initials: HZ
authors.lastname: Guo
authors.forename: Gui-Qin
authors.initials: GQ
authors.lastname: Qu
authors.forename: Jian
authors.initials: J
authors.lastname: Han
authors.forename: De-An
authors.initials: DA
authors.lastname: Guo
mesh_terms: D017209:Apoptosis / Q000187:drug effects*; D015153:Blotting, Western; D006528:Carcinoma, Hepatocellular / Q000378:metabolism / Q000473:pathology; D053148:Caspase 3 / Q000378:metabolism; D002453:Cell Cycle / Q000187:drug effects; D002455:Cell Division / Q000187:drug effects; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D053938:DNA Fragmentation / Q000187:drug effects; D004224:Diterpenes / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D004789:Enzyme Activation / Q000187:drug effects; D005434:Flow Cytometry; D016195:G2 Phase / Q000187:drug effects; D006801:Humans; D008113:Liver Neoplasms / Q000378:metabolism / Q000473:pathology; D028201:Pinaceae / Q000737:chemistry; D013997:Time Factors
chemical_list: D004224:Diterpenes; C058391:pseudolaric acid B; D053148:Caspase 3