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Epigenetic Regulation of Cardiac Differentiation of Embryonic Stem Cells and Tissues
Published on: June 3, 2016
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Sirt2 epigenetically down-regulates PDGFRα expression and promotes CG4 cell differentiation
Na Fang1,2, Junjun Cheng1, Chu Zhang1
1a Department of Biochemistry and Molecular Biology , Basic Medical School, Henan University , Kaifeng , China.
Cell Cycle (Georgetown, Tex.)
|April 26, 2019
Summary
Sirtuin 2 (Sirt2) aids oligodendroglial cell differentiation by epigenetically suppressing PDGFRα expression, promoting a shift from proliferation to a post-mitotic state.
Area of Science:
- Neuroscience
- Cell Biology
- Epigenetics
Background:
- Sirtuin 2 (Sirt2) enhances cellular processes and myelin basic protein (MBP) expression in CG4 cells.
- The precise mechanism by which Sirt2 promotes oligodendroglial differentiation was previously unclear.
- Sirt2 expression in CG4 cells is known to be suppressed by the transcription factor Nkx2.2.
Purpose of the Study:
- To elucidate the detailed mechanism of Sirt2 in facilitating oligodendroglial cell differentiation.
- To investigate the role of Sirt2 in regulating PDGFRα expression and its impact on CG4 cell proliferation and differentiation.
Main Methods:
- Chromatin immunoprecipitation (ChIP) assay to detect Sirt2 binding to the PDGFRα promoter.
- Bisulfite sequencing to assess DNA methylation at the PDGFRα promoter.
- Sirt2 and PDGFRα knockdown/overexpression experiments.
- Cell proliferation assays.
Main Results:
- Sirt2 translocates into the nucleus during CG4 cell differentiation induction.
- Sirt2 binds to the PDGFRα promoter, inducing DNA methylation and histone H3 K27 trimethylation, thereby suppressing gene transcription.
- Sirt2 overexpression downregulates PDGFRα expression, while PDGFRα or Sirt2 knockdown affects cell proliferation.
- Sirt2 facilitates CG4 cell differentiation by suppressing PDGFRα, promoting a transition from proliferation to a post-mitotic state.
Conclusions:
- Sirt2 plays a critical role in CG4 cell differentiation through nuclear translocation and epigenetic modification of the PDGFRα promoter.
- Suppression of PDGFRα expression by Sirt2 is a key mechanism driving CG4 cells from a proliferative progenitor state to a post-mitotic differentiated state.
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