title: Transcriptional down-regulation of epidermal growth factor receptors by nerve growth factor treatment of PC12 cells.
abstract: Treatment of PC12 cells with nerve growth factor leads to a decrease in the number of epidermal growth factor receptors on the cell membrane. The mRNA for the epidermal growth factor receptor decreases in a comparable fashion. This decrease appears due to a decrease in the transcription of the epidermal growth factor receptor gene because first, there is no difference in the stability of the epidermal growth factor receptor mRNA, second, newly transcribed epidermal growth factor receptor mRNA is decreased in nerve growth factor-differentiated cells, and third, constructs containing the promoter region of the epidermal growth factor receptor gene are transcribed much less readily in nerve growth factor-differentiated cells than in untreated cells. The decreases in mRNA are not seen in the p140(trk)-deficient variant PC12nnr5 cells nor in cells containing either dominant-negative Ras or dominant-negative Src. Treatment with nerve growth factor also increases the cellular content of GCF2, a putative transcription factor inhibitory for the transcription of the epidermal growth factor receptor gene. The increase in GCF2, like the decrease in the epidermal growth factor receptor mRNA, is not seen in PC12nnr5 cells nor in cells expressing either dominant-negative Ras or dominant-negative Src. The results suggest that nerve growth factor-induced down-regulation of the epidermal growth factor receptor is under transcriptional control, is p140(trk)-, Ras-, and Src-dependent, and may involve transcriptional repression by GCF2.
authors.affiliation: Section on Growth Factors, NICHD, National Institutes of Health, Bethesda, Maryland 20892, USA.
authors.forename: M
authors.initials: M
authors.lastname: Shibutani
authors.forename: P
authors.initials: P
authors.lastname: Lazarovici
authors.forename: A C
authors.initials: AC
authors.lastname: Johnson
authors.forename: Y
authors.initials: Y
authors.lastname: Katagiri
authors.forename: G
authors.initials: G
authors.lastname: Guroff
mesh_terms: D000818:Animals; D017871:Calcium-Calmodulin-Dependent Protein Kinases / Q000378:metabolism; D015536:Down-Regulation; D066246:ErbB Receptors / Q000235:genetics*; D006801:Humans; D051379:Mice; D008969:Molecular Sequence Data; D009414:Nerve Growth Factors / Q000494:pharmacology*; D016716:PC12 Cells; D011401:Promoter Regions, Genetic; D011518:Proto-Oncogene Proteins / Q000378:metabolism; D016283:Proto-Oncogene Proteins p21(ras) / Q000378:metabolism; D016392:Proto-Oncogene Proteins pp60(c-src) / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics; D051381:Rats; D020794:Receptor Protein-Tyrosine Kinases / Q000378:metabolism; D020917:Receptor, trkA; D017475:Receptors, Nerve Growth Factor / Q000378:metabolism; D012097:Repressor Proteins / Q000378:metabolism; D014158:Transcription, Genetic
chemical_list: D009414:Nerve Growth Factors; D011518:Proto-Oncogene Proteins; D012333:RNA, Messenger; D017475:Receptors, Nerve Growth Factor; D012097:Repressor Proteins; D066246:ErbB Receptors; D020794:Receptor Protein-Tyrosine Kinases; D020917:Receptor, trkA; D016392:Proto-Oncogene Proteins pp60(c-src); D017871:Calcium-Calmodulin-Dependent Protein Kinases; C501009:HRAS protein, human; D016283:Proto-Oncogene Proteins p21(ras)