Skip to content


Volume 6 Supplement 3

Metabolism, diet and disease

  • Oral presentation
  • Open Access

Regulation of metabolism by sirtuins

  • 1
BMC Proceedings20126 (Suppl 3) :O9

  • Published:


  • Tumor Cell
  • Transcription Factor
  • Metabolic Pathway
  • Cellular Metabolism
  • Cell Metabolism

Mitochondrial sirtuins are NAD-dependent enzymes that bind and regulate numerous metabolic pathways within the mitochondria. For example, SIRT3 functions as an NAD-dependent deacetylase that binds and activates numerous oxidative pathways. We have discovered that sirtuins regulate metabolic pathways important in tumor cell metabolism. One hallmark feature of tumor cells is a shift from oxidative to glycolytic metabolism, and this reliance on aerobic glycolysis to support cell growth is known as the Warburg effect. We have discovered that SIRT3 has an additional effect on cellular metabolism by repressing cellular glycolysis through the regulation of HIF1α, a transcription factor that increases gene expression of glycolytic targets. SIRT3 null cells exhibit metabolic and genetic features of the Warburg effect and enhanced tumorigenecity in vivo. Likewise, SIRT3 overexpression reduces glycolysis in tumor cells. In sum, a better understanding of sirtuin-mediated regulation may identify novel ways to therapeutically target tumor metabolism.

Authors’ Affiliations

Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA


© Haigis; licensee BioMed Central Ltd. 2012

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.