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Fang N, Cheng J, Zhang C, Chen K, Zhang C, Hu Z, Bi R, Furber KL, Thangaraj M, Nazarali AJ, Ji S. Sirt2 epigenetically down-regulates PDGFRα expression and promotes CG4 cell differentiation. Cell Cycle 2019; 18:1095-1109. [PMID: 31020898 DOI: 10.1080/15384101.2019.1609818] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
We have previously found that Sirt2 enhanced the outgrowth of cellular processes and MBP expression in CG4 cells, where Sirt2 expression is suppressed by transcription factor Nkx2.2. However, the detailed mechanism of Sirt2 facilitating oligodendroglial cell differentiation remained unclear. In the present study, we observed that Sirt2 partially translocated into the nuclei when CG4 cells were induced to differentiate. Sirt2 was detected at the CpG island of PDGFRα promoter via ChIP assay during the cells differentiation process rather than during the state of growth. Sirt2 deacetylated protein(s) bound to the promoter of PDGFRα and simultaneously appeared to facilitate histone3 K27 tri-methylation, both of which are suppressive signatures on gene transcription activation. In bisulfate assay, we identified that Sirt2 significantly induced DNA methylation of PDGFRα promoter compared with the control. Consistently, Sirt2 overexpression down-regulated PDGFRα expression in CG4 cells. The knock-down of PDGFRα or Sirt2 over-expression repressed cell proliferation, but knock-down of Sirt2 promoted cell proliferation. Taken together, Sirt2 translocated into the nuclei while the cells initiated a differentiation process, facilitating CG4 cell differentiation partially through epigenetic modification and suppression of PDGFRα expression. The repression of PDGFRα expression mediated by Sirt2 appeared to facilitate a transition of cellular processes, i.e. from a proliferating progenitor state to a post-mitotic state in CG4 cells.
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Affiliation(s)
- Na Fang
- a Department of Biochemistry and Molecular Biology , Basic Medical School, Henan University , Kaifeng , China.,b Joint National Laboratory for Antibody Drug Engineering , Henan University , Kaifeng China
| | - Junjun Cheng
- a Department of Biochemistry and Molecular Biology , Basic Medical School, Henan University , Kaifeng , China
| | - Chu Zhang
- a Department of Biochemistry and Molecular Biology , Basic Medical School, Henan University , Kaifeng , China
| | - Keyuan Chen
- a Department of Biochemistry and Molecular Biology , Basic Medical School, Henan University , Kaifeng , China
| | - Chenyu Zhang
- a Department of Biochemistry and Molecular Biology , Basic Medical School, Henan University , Kaifeng , China
| | - Zichao Hu
- a Department of Biochemistry and Molecular Biology , Basic Medical School, Henan University , Kaifeng , China
| | - Ran Bi
- c College of Pharmacy and Nutrition and Neuroscience Research Cluster , University of Saskatchewan , Saskatoon , Canada
| | - Kendra L Furber
- c College of Pharmacy and Nutrition and Neuroscience Research Cluster , University of Saskatchewan , Saskatoon , Canada
| | - Merlin Thangaraj
- c College of Pharmacy and Nutrition and Neuroscience Research Cluster , University of Saskatchewan , Saskatoon , Canada
| | - Adil J Nazarali
- c College of Pharmacy and Nutrition and Neuroscience Research Cluster , University of Saskatchewan , Saskatoon , Canada
| | - Shaoping Ji
- a Department of Biochemistry and Molecular Biology , Basic Medical School, Henan University , Kaifeng , China.,b Joint National Laboratory for Antibody Drug Engineering , Henan University , Kaifeng China.,c College of Pharmacy and Nutrition and Neuroscience Research Cluster , University of Saskatchewan , Saskatoon , Canada
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Han J, Yang MG, Zhu J, Jin T. Complexity and wide range of neuromyelitis optica spectrum disorders: more than typical manifestations. Neuropsychiatr Dis Treat 2017; 13:2653-2660. [PMID: 29118581 PMCID: PMC5659226 DOI: 10.2147/ndt.s147360] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Neuromyelitis optica (NMO), considered to be mediated by autoantibodies, often cause severely disabling disorders of the central nervous system, and predominantly cause optic nerve damage and longitudinally extensive transverse myelitis. Remarkable progress has been made in deciphering NMO pathogenesis during the past decade. In 2015, the International Panel for NMO Diagnosis proposed the unifying term "NMO spectrum disorders" (NMOSD) and the updated NMOSD criteria reflects a wide range of disease and maintains reasonable specificity. Moreover, cumulative findings have indicated that NMOSD are frequently associated with multiple autoimmune diseases, thereby presenting complex clinical symptoms that make this disease more difficult to recognize. Notably, most neurologists do not heed these symptoms or comorbid conditions in patients with NMOSD. Whereas previous reviews have focused on pathogenesis, treatment, and prognosis in NMOSD, we summarize the present knowledge with particular emphasis on atypical manifestations and autoimmune comorbidities in patients with NMOSD. Furthermore, we emphasized the identification of these atypical characteristics to enable a broader and better understanding of NMOSD, and improve early accurate diagnosis and therapeutic decision making.
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Affiliation(s)
- Jinming Han
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Changchun, China
| | - Meng-Ge Yang
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Changchun, China
| | - Jie Zhu
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Changchun, China.,Department of Neurobiology, Care Sciences and Society, Karolinska Institute, Stockholm, Sweden
| | - Tao Jin
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Changchun, China
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