SIRT6 overexpression induces massive apoptosis in cancer cells but not in normal cells
Volume 10, Issue 18
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September 15, 2011
Pages 3153 - 3158http://dx.doi.org/10.4161/cc.10.18.17435
Authors: Michael Van Meter, Zhiyong Mao, Vera Gorbunova and Andrei Seluanov View affiliations
Emerging evidence suggests that Sirtuin 6 (SIRT6) functions as a longevity assurance gene by promoting genomic stability, regulating metabolic processes and attenuating inflammation. Here, we examine the effect of SIRT6 activation on cancer cells. We show that SIRT6 overexpression induces massive apoptosis in a variety of cancer cell lines but not in normal, non-transformed cells. This cell death requires the mono-ADP-ribosyltransferase but not the deacetylase activity of SIRT6 and is mediated by the activation of both the p53 and p73 apoptotic signaling cascades in cancer cells by SIRT6. These results suggest that SIRT6 is an attractive target for pharmacological activation in cancer treatment.
Received: July 15, 2011; Accepted: July 25, 2011