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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Hallahan, D. E. Virudachalam, S. Kufe, D. W. Weichselbaum, R. R. Kuchibhotla, J. |
| Description | Author Affiliation: Hallahan DE ( Department of Radiation and Cellular Oncology, University of Chicago, IL 60637.); |
| Abstract | Cells adapt to adverse environmental conditions through a wide range of responses that are conserved throughout evolution. Physical agents such as ionizing radiation are known to initiate a stress response that is triggered by the recognition of DNA damage. We have identified a signaling pathway involving the activation of phospholipase A2 and protein kinase C in human cells that confers x-ray induction of the tumor necrosis factor alpha gene. Treatment of human cells with ionizing radiation or H2O2 was associated with the production of arachidonic acid. Inhibition of phospholipase A2 abolished radiation-mediated arachidonate production as well as the subsequent activation of protein kinase C and tumor necrosis factor alpha gene expression. These findings demonstrate that ionizing radiation-mediated gene expression in human cells is regulated in part by extranuclear signal transduction. One practical application of phospholipase A2 inhibitors is to ameliorate the adverse effects of radiotherapy associated with tumor necrosis factor alpha production. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 11 |
| Volume Number | 91 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1994-06-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Gene Expression Regulation Radiation Effects Second Messenger Systems Tumor Necrosis Factor-alpha Genetics Amino Acid Sequence Arachidonic Acids Biosynthesis Cell Line Cell Membrane Metabolism Enzyme Activation Molecular Sequence Data Phospholipases A Antagonists & Inhibitors Phospholipases A2 Protein Kinase C Transcriptional Activation 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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