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SIRT3: Oncogene and Tumor Suppressor in Cancer

Grupo Multidisciplinar de Oncología Traslacional, Institut Universitari d´Investigació en Ciències de la Salut (IUNICS), Universitat de les Illes Balears. Cra de Valldemossa, km 7.5, 07122 Palma, Illes Balears 07122, Spain
Ciber Fisiopatología Obesidad y Nutrición (CB06/03) Instituto Salud Carlos III, Madrid 28029, Spain
Instituto de Investigación Sanitaria de Baleares (IdISBa), Hospital Universitario, Son Espases, edificio S. E-07120 Palma, Palma de Mallorca, Illes Balears 07120, Spain
Author to whom correspondence should be addressed.
Academic Editor: Samuel C. Mok
Cancers 2017, 9(7), 90;
Received: 4 May 2017 / Revised: 2 July 2017 / Accepted: 7 July 2017 / Published: 12 July 2017
Sirtuin 3 (SIRT3), the major deacetylase in mitochondria, plays a crucial role in modulating oxygen reactive species (ROS) and limiting the oxidative damage in cellular components. SIRT3 targets different enzymes which regulate mitochondrial metabolism and participate in ROS detoxification, such as the complexes of the respiratory chain, the isocitrate dehydrogenase, or the manganese superoxide dismutase. Thus, SIRT3 activity is essential in maintaining mitochondria homeostasis and has recently received great attention, as it is considered a fidelity protein for mitochondrial function. In some types of cancer, SIRT3 functions as a tumoral promoter, since it keeps ROS levels under a certain threshold compatible with cell viability and proliferation. On the contrary, other studies describe SIRT3 as a tumoral suppressor, as SIRT3 could trigger cell death under stress conditions. Thus, SIRT3 could have a dual role in cancer. In this regard, modulation of SIRT3 activity could be a new target to develop more personalized therapies against cancer. View Full-Text
Keywords: SIRT3; cancer; ROS; antioxidant enzymes; mitochondria SIRT3; cancer; ROS; antioxidant enzymes; mitochondria
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Torrens-Mas, M.; Oliver, J.; Roca, P.; Sastre-Serra, J. SIRT3: Oncogene and Tumor Suppressor in Cancer. Cancers 2017, 9, 90.

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