title: Proteomic profiling revealed the functional networks associated with mitotic catastrophe of HepG2 hepatoma cells induced by 6-bromine-5-hydroxy-4-methoxybenzaldehyde.
abstract: Mitotic catastrophe, a form of cell death resulting from abnormal mitosis, is a cytotoxic death pathway as well as an appealing mechanistic strategy for the development of anti-cancer drugs. In this study, 6-bromine-5-hydroxy-4-methoxybenzaldehyde was demonstrated to induce DNA double-strand break, multipolar spindles, sustain mitotic arrest and generate multinucleated cells, all of which indicate mitotic catastrophe, in human hepatoma HepG2 cells. We used proteomic profiling to identify the differentially expressed proteins underlying mitotic catastrophe. A total of 137 differentially expressed proteins (76 upregulated and 61 downregulated proteins) were identified. Some of the changed proteins have previously been associated with mitotic catastrophe, such as DNA-PKcs, FoxM1, RCC1, cyclin E, PLK1-pT210, 14-3-3σ and HSP70. Multiple isoforms of 14-3-3, heat-shock proteins and tubulin were upregulated. Analysis of functional significance revealed that the 14-3-3-mediated signaling network was the most significantly enriched for the differentially expressed proteins. The modulated proteins were found to be involved in macromolecule complex assembly, cell death, cell cycle, chromatin remodeling and DNA repair, tubulin and cytoskeletal organization. These findings revealed the overall molecular events and functional signaling networks associated with spindle disruption and mitotic catastrophe.
authors.affiliation: Department of Radiation Toxicology and Oncology, Beijing Institute of Radiation Medicine, Beijing 100850, PR China.
authors.forename: Bo
authors.initials: B
authors.lastname: Zhang
authors.forename: Bo
authors.initials: B
authors.lastname: Huang
authors.forename: Hua
authors.initials: H
authors.lastname: Guan
authors.forename: Shi-Meng
authors.initials: SM
authors.lastname: Zhang
authors.forename: Qin-Zhi
authors.initials: QZ
authors.lastname: Xu
authors.forename: Xing-Peng
authors.initials: XP
authors.lastname: He
authors.forename: Xiao-Dan
authors.initials: XD
authors.lastname: Liu
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.forename: Zeng-Fu
authors.initials: ZF
authors.lastname: Shang
authors.forename: Ping-Kun
authors.initials: PK
authors.lastname: Zhou
mesh_terms: D017209:Apoptosis / Q000187:drug effects; D001547:Benzaldehydes / Q000494:pharmacology*; D002453:Cell Cycle / Q000187:drug effects; D020552:Comet Assay; D004249:DNA Damage; D005434:Flow Cytometry; D056945:Hep G2 Cells; D006801:Humans; D008113:Liver Neoplasms / Q000188:drug therapy / Q000378:metabolism* / Q000473:pathology; D008938:Mitosis / Q000187:drug effects; D040901:Proteomics / Q000379:methods*
chemical_list: D001547:Benzaldehydes; C515564:bromovanin