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| Content Provider | PubMed Central |
|---|---|
| Author | Spector, Neil L. Yarden, Yosef Smith, Bradley Lyass, Ljuba Patricia, Trusk Pry, Karen Hill, Jason E. Xia, Wenle Seger, Rony Bacus, Sarah S. |
| Copyright Year | 2007 |
| Abstract | The human EGF receptor (HER) 2 receptor tyrosine kinase is a survival factor for human cardiomyocytes, and its inhibition may explain the increased incidence of cardiomyopathy associated with the anti-HER2 monoclonal antibody trastuzumab (Genentech, South San Francisco, CA), particularly in patients with prior exposure to cardiotoxic chemotherapies e.g., anthracyclines. Here, we show that GW2974 (HER2/EGF receptor tyrosine kinase inhibitor), but not trastuzumab, activates AMP-activated protein kinase (AMPK), initiating a metabolic stress response in human cardiomyocytes that protects against TNFα-induced cell death. GW2974 stimulates calcium dependent fatty acid oxidation in vitro and in the myocardium of GW2974-treated rodents. Calcium chelation or siRNA-targeted AMPK knockdown blocks GW2974 induced fatty acid oxidation. In addition, inhibition of AMPK by a specific inhibitor resulted in increased killing of cardiomyocytes. Elucidating the effects of HER2-targeted therapies on AMPK may predict for risk of cardiomyopathy and provide a novel HER2-targeted strategy designed to protect myocardium from the pro-apoptotic effects of pro-inflammatory cytokines released in response to cardiac injury by chemotherapy or acute ischemia. |
| Related Links | http://dx.doi.org/10.1073/pnas.0701286104 |
| Ending Page | 10612 |
| Page Count | 6 |
| Starting Page | 10607 |
| File Format | |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 25 |
| Volume Number | 104 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2007-06-19 |
| Access Restriction | Open |
| Rights Holder | National Academy of Sciences |
| Subject Keyword | General Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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