title: Oncogene-induced transcriptional patterns in established cell lines as a model for in vitro analysis of tumor biology.
abstract: Established cell lines have long been used for in vitro studies of tumor biology, enabling investigators to control growth conditions and to draw important conclusions about the oncogenic microenvironment. However, gene expression behavior in cultured cells may not always reflect the actual in vivo scenario, and analysis derived from such experiments should take into consideration the existing differences between the two environments. We used suppression subtractive hybridization to study transcriptional changes elicited after oncogene transformation and cell line establishment. We found that transcriptional changes elicited in cultured cell lines are in fact representative of late events, and they do not occur early after oncogene transfection or activation. We also determined that a fraction of the transcriptional changes is oncogene specific, whereas other changes are shared between two or more different oncogenes.
authors.affiliation: Departamento de Ciências Biológicas, Centro de Ciências Humanas e Naturais, Universidade Federal do Espírito Santo,Vitória, ES, Brasil.
authors.forename: Francisco de Paula
authors.initials: Fde P
authors.lastname: Careta
authors.forename: Bruno Marcos Verbeno
authors.initials: BM
authors.lastname: Azevedo
authors.forename: Beatriz Alves
authors.initials: BA
authors.lastname: Vianna
authors.forename: Greiciane Gaburro
authors.initials: GG
authors.lastname: Paneto
authors.forename: Irineu Iester
authors.initials: II
authors.lastname: Degasperi
authors.forename: Marcos do Carmo
authors.initials: Mdo C
authors.lastname: Oyama
authors.forename: Valéria
authors.initials: V
authors.lastname: Fagundes
authors.forename: Angela Maria Spagno
authors.initials: AM
authors.lastname: Perrone
authors.forename: Iúri Drumond
authors.initials: ID
authors.lastname: Louro
mesh_terms: D015152:Blotting, Northern; D002460:Cell Line / Q000473:pathology; D002471:Cell Transformation, Neoplastic / Q000235:genetics* / Q000473:pathology; D015870:Gene Expression; D006801:Humans; D017403:In Situ Hybridization; D009857:Oncogenes / Q000235:genetics*; D014158:Transcription, Genetic / Q000235:genetics*; D014407:Tumor Cells, Cultured