title: Peroxisome proliferator-activated receptor gamma coactivator-1 alpha (PGC-1alpha) upregulated E-cadherin expression in HepG2 cells.
abstract: Peroxisome proliferator-activated receptor gamma coactivator-1 alpha (PGC-1alpha), a highly inducible transcriptional coactivator regulating energy homeostasis, is down-regulated in hepatoma tissues. To dissect its role in hepato-tumorigenesis, Ingenuity Pathway Analysis was applied to construct pathways affected by PGC-1alpha upregulation in HepG2 hepatoma cells based on our microarray data. Interestingly, migration of these cells was markedly diminished by PGC-1alpha overexpression in consistency with Ingenuity results. Moreover, a deduced expression increase of E-cadherin was also observed in PGC-1alpha-overexpressing HepG2 cells. Finally, transient transfection and chromatin-immunoprecipitation assays suggested that increased histone acetylation might be responsible for PGC-1alpha-mediated transactivation of a minimal E-cadherin promoter.
authors.affiliation: Department and Institute of Pharmacology, School of Medicine, National Yang-Ming University, Taipei, Taiwan, ROC.
authors.forename: Hui-Ju
authors.initials: HJ
authors.lastname: Lee
authors.forename: Yeu
authors.initials: Y
authors.lastname: Su
authors.forename: Wing-Yiu
authors.initials: WY
authors.lastname: Lui
authors.forename: Gar-Yang
authors.initials: GY
authors.lastname: Chau
authors.forename: Pen-Hui
authors.initials: PH
authors.lastname: Yin
authors.forename: Hsin-Chen
authors.initials: HC
authors.lastname: Lee
authors.forename: Chin-Wen
authors.initials: CW
authors.lastname: Chi
mesh_terms: D000256:Adenoviridae; D015820:Cadherins / Q000235:genetics* / Q000378:metabolism; D045744:Cell Line, Tumor; D002465:Cell Movement; D049109:Cell Proliferation; D004734:Energy Metabolism / Q000235:genetics; D005455:Fluorescent Antibody Technique; D020869:Gene Expression Profiling; D015972:Gene Expression Regulation, Neoplastic; D006360:Heat-Shock Proteins / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D018613:Microscopy, Confocal; D000071248:Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*; D015533:Transcriptional Activation / Q000235:genetics; D014161:Transduction, Genetic; D015854:Up-Regulation
chemical_list: D015820:Cadherins; D006360:Heat-Shock Proteins; C486497:PPARGC1A protein, human; D000071248:Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha; D012333:RNA, Messenger; D014157:Transcription Factors