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Originally published in Science Express on 4 June 2009
Science 17 July 2009:
Vol. 325. no. 5938, pp. 332 - 336
DOI: 10.1126/science.1172308
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Reports

RIP3, an Energy Metabolism Regulator That Switches TNF-Induced Cell Death from Apoptosis to Necrosis

Duan-Wu Zhang,1 Jing Shao,1 Juan Lin,1 Na Zhang,1 Bao-Ju Lu,2 Sheng-Cai Lin,1 Meng-Qiu Dong,2 Jiahuai Han1,*

Necrosis can be induced by stimulating death receptors with tumor necrosis factor (TNF) or other agonists; however, the underlying mechanism differentiating necrosis from apoptosis is largely unknown. We identified the protein kinase receptor-interacting protein 3 (RIP3) as a molecular switch between TNF-induced apoptosis and necrosis in NIH 3T3 cells and found that RIP3 was required for necrosis in other cells. RIP3 did not affect RIP1-mediated apoptosis but was required for RIP1-mediated necrosis and the enhancement of necrosis by the caspase inhibitor zVAD. By activating key enzymes of metabolic pathways, RIP3 regulates TNF-induced reactive oxygen species production, which partially accounts for RIP3’s ability to promote necrosis. Our data suggest that modulation of energy metabolism in response to death stimuli has an important role in the choice between apoptosis and necrosis.

1 Key Laboratory of the Ministry of Education for Cell Biology and Tumor Cell Engineering, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, China.
2 National Institute of Biological Sciences, Beijing 102206, China.

* To whom correspondence should be addressed. E-mail: jhan{at}xmu.edu.cn

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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P. Geserick, M. Hupe, M. Moulin, W. W.-L. Wong, M. Feoktistova, B. Kellert, H. Gollnick, J. Silke, and M. Leverkus (2009)
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RIP Kinases Initiate Programmed Necrosis.
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