干细胞之争
赢家还是输家？
体细胞诱导干细胞研究成果之争，专业人士如何评论
Science June 4, 2009 DOI: 10.1126/science.1172308
RIP3, an Energy Metaboli 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 Han 1*
1 The 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 The National Institute of Biological Sciences, Beijing, China.
* To whom correspondence should be addressed.
Necrosis can be induced by stimulating death receptors with tumor necrosis factor (TNF) or other agonists; however, the underlying mechani differentiating necrosis from apoptosis is largely unknown. We identified the protein kinase RIP3 as a molecular switch between TNF-induced apoptosis and necrosis in NIH3T3 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 regulated TNF-induced reactive oxygen species production, which partially accounts for RIP3’s ability to promote necrosis. Our data suggest that modulation of energy metaboli in response to death stimuli has an important role in the choice between apoptosis and necrosis.
