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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Deng, Y. Wu, X. |
| Description | Author Affiliation: Deng Y ( Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030, USA.); |
| Abstract | Mitochondria is believed to play a central role in p53-mediated apoptosis. However, the signal transduction pathways leading to mitochondria remain unclear. Here, we report that translocation of Bax protein from cytosol to mitochondria is required for p53-induced apoptosis. Cytosolic Bax is unable to induce apoptosis, and blocking Bax translocation inhibits cell death. Expression of Bcl-2 blocks cytochrome c release and apoptosis but has no effect on Bax translocation, suggesting that Bax translocation acts upstream of Bcl-2. We further demonstrate that Peg3/Pw1, a protein up-regulated in p53-mediated cell death process, induces Bax translocation independent of apoptosis. The results suggest that Bax translocation represents an important regulatory step in p53-mediated apoptosis, and Peg3/Pw1 functions as a modulator downstream of p53 to regulate Bax redistribution in the cells, thus favoring the cellular decision toward apoptosis over growth arrest following p53 induction. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 22 |
| Volume Number | 97 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2000-11-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Apoptosis Physiology Cytosol Metabolism Mitochondria Proteins Proto-Oncogene Proteins C-bcl-2 Proto-Oncogene Proteins Transcription Factors Tumor Suppressor Protein P53 Blotting, Western Cell Line Cytochrome c Group Antagonists & Inhibitors Protein Transport Subcellular Fractions Bcl-2-Associated X Protein Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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