The arginine methyltransferase PRMT6 regulates cell proliferation and senescence through transcriptional repression of tumor suppressor genes
| العنوان: | The arginine methyltransferase PRMT6 regulates cell proliferation and senescence through transcriptional repression of tumor suppressor genes |
|---|---|
| المؤلفون: | Diana Rüthnick, Uta-Maria Bauer, Stefanie Riedl, Claudia Stein, René Reiner Nötzold |
| المصدر: | Nucleic Acids Research |
| بيانات النشر: | Oxford University Press (OUP), 2012. |
| سنة النشر: | 2012 |
| مصطلحات موضوعية: | Cyclin-Dependent Kinase Inhibitor p21, Senescence, Protein-Arginine N-Methyltransferases, Transcription, Genetic, Gene Regulation, Chromatin and Epigenetics, Cell Line, Histone H3, Cyclin-dependent kinase, Cell Line, Tumor, Genetics, Humans, Genes, Tumor Suppressor, Cellular Senescence, Cyclin-Dependent Kinase Inhibitor p16, Cell Proliferation, Regulation of gene expression, Gene knockdown, biology, Nuclear Proteins, Cell cycle, Chromatin, Repressor Proteins, Gene Expression Regulation, biology.protein, Cancer research, Cell aging |
| الوصف: | The protein arginine methyltransferase 6 (PRMT6) is a coregulator of gene expression and executes its repressing as well as activating function by asymmetric dimethylation of histone H3 at R2 (H3 R2me2a). Given that elevated expression levels of PRMT6 have been reported in various cancer types, we explore here its role in cell proliferation and senescence. We find that knockdown of PRMT6 results in proliferation defects of transformed as well as non-transformed cells, causes G1-phase arrest and induces senescence. This phenotype is accompanied by transcriptional upregulation of important cell cycle regulators, most prominently the cyclin-dependent kinase (CDK) inhibitor gene p21 (p21(CIP1/WAF1), CDKN1A) and p16 (p16(INK4A), CDKN2A). Chromatin immuno-precipitation analysis reveals that the p21 gene is a direct target of PRMT6 and the corresponding histone mark H3 R2me2a. Using a cell model of oncogene-induced senescence (OIS), in which p21 is an essential activator of the senescent phenotype, we show that PRMT6 expression declines upon induction of senescence and conversely p21 gene expression increases. Moreover, overexpression of PRMT6 leads to reduced levels of OIS. These findings indicate that the transcriptional repressor activity of PRMT6 facilitates cell proliferation and blocks senescence by regulation of tumor suppressor genes and that this might contribute to the oncogenic capacity of PRMT6. |
| تدمد: | 1362-4962 0305-1048 |
| DOI: | 10.1093/nar/gks767 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b4fc5728c4d6f534045606f4d58b032 https://doi.org/10.1093/nar/gks767 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....4b4fc5728c4d6f534045606f4d58b032 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13624962 03051048 |
|---|---|
| DOI: | 10.1093/nar/gks767 |