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 language | English (US) |
|---|---|
| Pages (from-to) | 41-52 |
| Number of pages | 12 |
| Journal | Cancer Cell |
| Volume | 17 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 19 2010 |
| Externally published | Yes |
Keywords
- CELLCYCLE
- PROTEINS
ASJC Scopus subject areas
- Oncology
- Cancer Research
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