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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Pietenpol, J. A. Stein, R. W. Holt, J. T. Moses, H. L. |
| Description | Author Affiliation: Pietenpol JA ( Department of Cell Biology, Vanderbilt University School of Medicine, Nashville, TN 37232.); |
| Abstract | Transforming growth factor beta 1 (TGF-beta 1) is a potent growth inhibitor for many cell types, including most epithelial cells. However, the mechanism of growth inhibition is unknown. In skin keratinocytes, TGF-beta 1 has been shown to inhibit growth and to rapidly reduce c-myc expression. It has been demonstrated that protein synthesis is required for TGF-beta 1 regulation of c-myc in keratinocytes. Here we present evidence that treatment of mouse BALB/MK keratinocyte cells with either antisense c-myc oligonucleotides or TGF-beta 1 inhibited cell entry into S phase. These results suggest that TGF-beta inhibition of c-myc expression may be essential for growth inhibition by TGF-beta 1. The block in c-myc expression by TGF-beta 1 occurred at the level of transcriptional initiation. Studies with a series of 5' deletion c-myc/chloramphenicol acetyltransferase constructs indicated that a cis regulatory element(s), which resides between positions -100 and +71 relative to P1 transcription start site, is responsible for the TGF-beta 1 responsiveness. Based on these data, it is proposed that the mechanism of TGF-beta 1 growth inhibition involves synthesis or modification of a protein that may interact with a specific element(s) in the 5' regulatory region of the c-myc gene, resulting in inhibition of transcriptional initiation. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 10 |
| Volume Number | 87 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1990-06-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Keratinocytes Cytology Proto-Oncogene Proteins Genetics Proto-Oncogenes Drug Effects Suppression, Genetic Transcription, Genetic Transforming Growth Factors Pharmacology Animals Cell Division Cell Nucleus Metabolism Cells, Cultured Chloramphenicol O-Acetyltransferase DNA Replication Gene Expression Enzymology Mice Mice, Inbred BALB C Molecular Sequence Data Oligodeoxyribonucleotides Protein-Tyrosine Kinases Proto-Oncogene Proteins C-myc Restriction Mapping Transfection Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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