SIRT1 promotes proliferation and inhibits apoptosis of human malignant glioma cell lines

Neurosci Lett. 2012 Sep 13;525(2):168-72. doi: 10.1016/j.neulet.2012.07.025. Epub 2012 Jul 31.


In mammalian cells, SIRT1 decreases PTEN acetylation and inactivates the AKT pathway in a SIRT1 deacetylase-dependent manner. However, the function of SIRT1 in glioma was unknown. SIRT1 reexpression or knockdown was induced in human glioma cell lines. The cell synchronization, BrdU labeling and mitotic index were detected. Subsequently, cell cycle, cell viability, apoptosis, cell growth and proliferation were analyzed. Our work identified that SIRT1-knockdown significantly delayed mitotic entry of glioma cells, inhibited its growth and proliferation, and promoted its apoptosis. The apoptosis was related to PTEN/PI3K/AKT signaling pathway. The results showed that SIRT1 might be a promoter factor on tumorigenesis of glioma through PTEN/PI3K/AKT signaling pathway.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Apoptosis*
  • Caspase 3 / metabolism
  • Caspase 7 / metabolism
  • Cell Line, Tumor
  • Cell Proliferation*
  • Gene Knockdown Techniques
  • Gene Silencing
  • Glioma / metabolism
  • Glioma / pathology*
  • Humans
  • Mitosis
  • PTEN Phosphohydrolase / physiology
  • Phosphatidylinositol 3-Kinases / physiology
  • Proto-Oncogene Proteins c-akt / physiology
  • Signal Transduction
  • Sirtuin 1 / genetics
  • Sirtuin 1 / metabolism*


  • Phosphatidylinositol 3-Kinases
  • Proto-Oncogene Proteins c-akt
  • PTEN Phosphohydrolase
  • PTEN protein, human
  • Caspase 3
  • Caspase 7
  • SIRT1 protein, human
  • Sirtuin 1