title: Suppression of the EGF-dependent induction of c-myc proto-oncogene expression by transforming growth factor beta in a human breast carcinoma cell line.
abstract: Alterations in c-myc proto-oncogene expression after treatment of human mammary carcinoma MDA-468 cells with epidermal growth factor (EGF) and/or transforming growth factor beta (TGF beta) have been investigated. A stimulation of c-myc messenger RNA was detected within 60 min after treatment with EGF. This induction persisted for at least 24 hr, albeit to a lower extent. The early and late increase in c-myc mRNA levels induced by EGF were inhibited by the presence of TGF beta. TGF beta alone induced little change in c-myc mRNA levels. The effect of TGF beta represents a novel action of this hormone at the level of gene expression.
mesh_terms: D001943:Breast Neoplasms; D002460:Cell Line; D002471:Cell Transformation, Neoplastic; D004815:Epidermal Growth Factor / Q000494:pharmacology*; D005260:Female; D006133:Growth Substances / Q000494:pharmacology*; D006801:Humans; D007700:Kinetics; D010455:Peptides / Q000494:pharmacology*; D000090063:Proto-Oncogene Mas; D011519:Proto-Oncogenes / Q000187:drug effects*; D012333:RNA, Messenger / Q000187:drug effects / Q000235:genetics; D014158:Transcription, Genetic / Q000187:drug effects*; D015291:Transforming Growth Factors
chemical_list: D006133:Growth Substances; C000715470:MAS1 protein, human; D010455:Peptides; D000090063:Proto-Oncogene Mas; D012333:RNA, Messenger; D004815:Epidermal Growth Factor; D015291:Transforming Growth Factors