Title |
Autophagy Suppresses RIP Kinase-Dependent Necrosis Enabling Survival to mTOR Inhibition
|
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Published in |
PLOS ONE, July 2012
|
DOI | 10.1371/journal.pone.0041831 |
Pubmed ID | |
Authors |
Kevin Bray, Robin Mathew, Alexandria Lau, Jurre J. Kamphorst, Jing Fan, Jim Chen, Hsin-Yi Chen, Anahita Ghavami, Mark Stein, Robert S. DiPaola, Donna Zhang, Joshua D. Rabinowitz, Eileen White |
Abstract |
mTOR inhibitors are used clinically to treat renal cancer but are not curative. Here we show that autophagy is a resistance mechanism of human renal cell carcinoma (RCC) cell lines to mTOR inhibitors. RCC cell lines have high basal autophagy that is required for survival to mTOR inhibition. In RCC4 cells, inhibition of mTOR with CCI-779 stimulates autophagy and eliminates RIP kinases (RIPKs) and this is blocked by autophagy inhibition, which induces RIPK- and ROS-dependent necroptosis in vitro and suppresses xenograft growth. Autophagy of mitochondria is required for cell survival since mTOR inhibition turns off Nrf2 antioxidant defense. Thus, coordinate mTOR and autophagy inhibition leads to an imbalance between ROS production and defense, causing necroptosis that may enhance cancer treatment efficacy. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
Mexico | 1 | 50% |
United States | 1 | 50% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 2 | 100% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
United States | 4 | 3% |
Germany | 1 | <1% |
Unknown | 134 | 96% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 35 | 25% |
Researcher | 26 | 19% |
Student > Master | 13 | 9% |
Student > Doctoral Student | 10 | 7% |
Professor > Associate Professor | 8 | 6% |
Other | 26 | 19% |
Unknown | 21 | 15% |
Readers by discipline | Count | As % |
---|---|---|
Agricultural and Biological Sciences | 41 | 29% |
Biochemistry, Genetics and Molecular Biology | 26 | 19% |
Medicine and Dentistry | 23 | 17% |
Immunology and Microbiology | 6 | 4% |
Neuroscience | 4 | 3% |
Other | 15 | 11% |
Unknown | 24 | 17% |