The Histone Deacetylase SIRT6 Is a Tumor Suppressor that Controls Cancer Metabolism
Author(s)Zwaans, Bernadette M.M.; Silberman, Dafne M.; Goren, Alon; Zhong, Lei; Ram, Oren; Truelove, Jessica; Guimaraes, Alexander R.; Toiber, Debra; Cosentino, Claudia; Greenson, Joel K.; MacDonald, Alasdair I.; McGlynn, Liane; Maxwell, Fraser; Edwards, Joanne; Giacosa, Sofia; Guccione, Ernesto; Weissleder, Ralph; Bernstein, Bradley E.; Regev, Aviv; Shiels, Paul G.; Lombard, David B.; Mostoslavsky, Raul; Sebastian, Carlos; Gymrek, Melissa A.; Bernstein, Bradley E.; ... Show more Show less
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Reprogramming of cellular metabolism is a key event during tumorigenesis. Despite being known for decades (Warburg effect), the molecular mechanisms regulating this switch remained unexplored. Here, we identify SIRT6 as a tumor suppressor that regulates aerobic glycolysis in cancer cells. Importantly, loss of SIRT6 leads to tumor formation without activation of known oncogenes, whereas transformed SIRT6-deficient cells display increased glycolysis and tumor growth, suggesting that SIRT6 plays a role in both establishment and maintenance of cancer. By using a conditional SIRT6 allele, we show that SIRT6 deletion in vivo increases the number, size, and aggressiveness of tumors. SIRT6 also functions as a regulator of ribosome metabolism by corepressing MYC transcriptional activity. Lastly, Sirt6 is selectively downregulated in several human cancers, and expression levels of SIRT6 predict prognosis and tumor-free survival rates, highlighting SIRT6 as a critical modulator of cancer metabolism. Our studies reveal SIRT6 to be a potent tumor suppressor acting to suppress cancer metabolism.
DepartmentHarvard University--MIT Division of Health Sciences and Technology; Massachusetts Institute of Technology. Department of Biology; Whitehead Institute for Biomedical Research
Sebastian, Carlos, Bernadette M.M. Zwaans, Dafne M. Silberman, Melissa Gymrek, Alon Goren, Lei Zhong, Oren Ram, et al. “The Histone Deacetylase SIRT6 Is a Tumor Suppressor That Controls Cancer Metabolism.” Cell 151, no. 6 (December 2012): 1185–1199. © 2012 Elsevier Inc.
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