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Updated: Jun 2, 2026
Deacetylation Assays to Unravel the Interplay between Sirtuins (SIRT2) and Specific Protein-substrates
Published on: February 27, 2016
Silencing of SIRT2 induces cell death and a decrease in the intracellular ATP level of PC12 cells
Abstract:
Sirtuin 2 (SIRT2), a tubulin deacetylase, is a sirtuin family protein. SIRT2 inhibitors have been shown to decrease the cell death in cellular and Drosophila models of Parkinson's disease. However, SIRT2 decreases may also compromise cellular antioxidation capacity. Our current study found that silencing of SIRT2 led to a decrease in the intracellular ATP level of PC12 cells. We also found that AGK2, a selective SIRT2 inhibitor, can exacerbate H2O2-induced decreases in the intracellular ATP level of these cells. Our study further indicated that the reduction in SIRT2 level significantly increased necrosis of PC12 cells without affecting autophagy of the cells. These results suggest that SIRT2 is a key mediator of energy metabolism and basal survival of PC12 cells.
Insights
Sirtuin 2 (SIRT2) reduction impairs PC12 cell energy and survival, increasing necrosis. SIRT2 is crucial for cellular energy metabolism and basal survival, impacting Parkinson's disease models.
Area of Science:
- Neuroscience
- Cell Biology
- Biochemistry
Background:
- Sirtuin 2 (SIRT2) is a tubulin deacetylase implicated in cellular processes.
- SIRT2 inhibition shows promise in Parkinson's disease models by reducing cell death.
- Potential negative impacts of SIRT2 reduction on cellular antioxidant capacity are noted.
Purpose of the Study:
- To investigate the role of Sirtuin 2 (SIRT2) in cellular energy metabolism and survival.
- To determine the effect of SIRT2 modulation on PC12 cell ATP levels and necrosis.
- To evaluate the impact of a selective SIRT2 inhibitor (AGK2) on oxidative stress-induced ATP depletion.
Main Methods:
- Silencing of SIRT2 in PC12 cells.
- Treatment of PC12 cells with AGK2, a selective SIRT2 inhibitor.
- Assessment of intracellular ATP levels and cell necrosis.
- Evaluation of autophagy markers.
Main Results:
- SIRT2 silencing decreased intracellular ATP levels in PC12 cells.
- AGK2 exacerbated hydrogen peroxide-induced ATP reduction.
- Reduced SIRT2 levels significantly increased PC12 cell necrosis.
- Autophagy was not affected by SIRT2 reduction.
Conclusions:
- SIRT2 plays a critical role in maintaining intracellular ATP levels.
- SIRT2 is essential for basal survival and energy metabolism in PC12 cells.
- Targeting SIRT2 may have complex effects on cellular health, impacting both cell death and energy levels.
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