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SIRT3 Is a Mitochondria-Localized Tumor Suppressor Required for Maintenance of Mitochondrial Integrity and Metabolism during Stress

  • Hyun Seok Kim
  • , Krish Patel
  • , Kristi Muldoon-Jacobs
  • , Kheem S. Bisht
  • , Nukhet Aykin-Burns
  • , J. Daniel Pennington
  • , Riet van der Meer
  • , Phuongmai Nguyen
  • , Jason Savage
  • , Kjerstin M. Owens
  • , Athanassios Vassilopoulos
  • , Ozkan Ozden
  • , Seong Hoon Park
  • , Keshav K. Singh
  • , Sarki A. Abdulkadir
  • , Douglas R. Spitz
  • , Chu Xia Deng
  • , David Gius

Research output: Contribution to journalArticlepeer-review

Abstract

The sirtuin gene family (SIRT) is hypothesized to regulate the aging process and play a role in cellular repair. This work demonstrates that SIRT3-/- mouse embryonic fibroblasts (MEFs) exhibit abnormal mitochondrial physiology as well as increases in stress-induced superoxide levels and genomic instability. Expression of a single oncogene (Myc or Ras) in SIRT3-/- MEFs results in in vitro transformation and altered intracellular metabolism. Superoxide dismutase prevents transformation by a single oncogene in SIRT3-/- MEFs and reverses the tumor-permissive phenotype as well as stress-induced genomic instability. In addition, SIRT3-/- mice develop ER/PR-positive mammary tumors. Finally, human breast and other human cancer specimens exhibit reduced SIRT3 levels. These results identify SIRT3 as a genomically expressed, mitochondria-localized tumor suppressor.

Original languageEnglish (US)
Pages (from-to)41-52
Number of pages12
JournalCancer Cell
Volume17
Issue number1
DOIs
StatePublished - Jan 19 2010
Externally publishedYes

Keywords

  • CELLCYCLE
  • PROTEINS

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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