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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Lee, Jin Hyup Sancar, Aziz |
| Description | Author Affiliation: Lee JH ( Department of Biochemistry and Biophysics, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA.); |
| Abstract | In mice and humans the circadian rhythm of many biochemical reactions, physiology, and behavior is generated by a transcriptional-translation feedback loop (TTFL) made up of the so-called core clock genes/proteins. The circadian system interfaces with most signaling pathways including those involved in cell proliferation and inflammation. Cryptochrome (CRY) is a core clock protein that plays an essential role in the repressive arm of the TTFL. It was recently reported that mutation of CRY in p53-null mice delayed the onset of cancer. It was therefore suggested that CRY mutation may activate p53-independent apoptosis pathways, which eliminate premalignant and malignant cells and thus delay overt tumor formation. Here we show that CRY mutation sensitizes p53 mutant and oncogenically transformed cells to tumor necrosis factor (TNF )-initiated apoptosis by interfacing with the NF-κB signaling pathway through the GSK3ß kinase and alleviating prosurvival NF-κB signaling. These findings provide a mechanistic foundation for the delayed onset of tumorigenesis in clock-disrupted p53 mutant mice and suggest unique therapeutic strategies for treating cancers associated with p53 mutation. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 29 |
| Volume Number | 108 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2011-07-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Apoptosis Physiology Circadian Rhythm Cryptochromes Metabolism NF-kappa B Signal Transduction Tumor Suppressor Protein P53 Animals Cell Line Chromatin Immunoprecipitation DNA Primers Genetics Glycogen Synthase Kinase 3 Immunoblotting Mice Mice, Inbred C57BL Mice, Knockout Mutation Positron-Emission Tomography Tumor Necrosis Factor-alpha Research Support, N.I.H., Extramural Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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