IKAROS is required for the measured response of NOTCH target genes upon external NOTCH signaling.
The tumor suppressor IKAROS binds and represses multiple NOTCH target genes. For their induction upon NOTCH signaling, IKAROS is removed and replaced by NOTCH Intracellular Domain (NICD)-associated proteins. However, IKAROS remains associated to other NOTCH activated genes upon signaling and inducti...
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2021-03-01
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| Series: | PLoS Genetics |
| Online Access: | https://journals.plos.org/plosgenetics/article/file?id=10.1371/journal.pgen.1009478&type=printable |
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| _version_ | 1850239719688896512 |
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| author | Maud Lemarié Stefania Bottardi Lionel Mavoungou Helen Pak Eric Milot |
| author_facet | Maud Lemarié Stefania Bottardi Lionel Mavoungou Helen Pak Eric Milot |
| author_sort | Maud Lemarié |
| collection | DOAJ |
| description | The tumor suppressor IKAROS binds and represses multiple NOTCH target genes. For their induction upon NOTCH signaling, IKAROS is removed and replaced by NOTCH Intracellular Domain (NICD)-associated proteins. However, IKAROS remains associated to other NOTCH activated genes upon signaling and induction. Whether IKAROS could participate to the induction of this second group of NOTCH activated genes is unknown. We analyzed the combined effect of IKAROS abrogation and NOTCH signaling on the expression of NOTCH activated genes in erythroid cells. In IKAROS-deleted cells, we observed that many of these genes were either overexpressed or no longer responsive to NOTCH signaling. IKAROS is then required for the organization of bivalent chromatin and poised transcription of NOTCH activated genes belonging to either of the aforementioned groups. Furthermore, we show that IKAROS-dependent poised organization of the NOTCH target Cdkn1a is also required for its adequate induction upon genotoxic insults. These results highlight the critical role played by IKAROS in establishing bivalent chromatin and transcriptional poised state at target genes for their activation by NOTCH or other stress signals. |
| format | Article |
| id | doaj-art-ea2abf58fe534e1c8cd38341cea0c3e3 |
| institution | OA Journals |
| issn | 1553-7390 1553-7404 |
| language | English |
| publishDate | 2021-03-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS Genetics |
| spelling | doaj-art-ea2abf58fe534e1c8cd38341cea0c3e32025-08-20T02:01:04ZengPublic Library of Science (PLoS)PLoS Genetics1553-73901553-74042021-03-01173e100947810.1371/journal.pgen.1009478IKAROS is required for the measured response of NOTCH target genes upon external NOTCH signaling.Maud LemariéStefania BottardiLionel MavoungouHelen PakEric MilotThe tumor suppressor IKAROS binds and represses multiple NOTCH target genes. For their induction upon NOTCH signaling, IKAROS is removed and replaced by NOTCH Intracellular Domain (NICD)-associated proteins. However, IKAROS remains associated to other NOTCH activated genes upon signaling and induction. Whether IKAROS could participate to the induction of this second group of NOTCH activated genes is unknown. We analyzed the combined effect of IKAROS abrogation and NOTCH signaling on the expression of NOTCH activated genes in erythroid cells. In IKAROS-deleted cells, we observed that many of these genes were either overexpressed or no longer responsive to NOTCH signaling. IKAROS is then required for the organization of bivalent chromatin and poised transcription of NOTCH activated genes belonging to either of the aforementioned groups. Furthermore, we show that IKAROS-dependent poised organization of the NOTCH target Cdkn1a is also required for its adequate induction upon genotoxic insults. These results highlight the critical role played by IKAROS in establishing bivalent chromatin and transcriptional poised state at target genes for their activation by NOTCH or other stress signals.https://journals.plos.org/plosgenetics/article/file?id=10.1371/journal.pgen.1009478&type=printable |
| spellingShingle | Maud Lemarié Stefania Bottardi Lionel Mavoungou Helen Pak Eric Milot IKAROS is required for the measured response of NOTCH target genes upon external NOTCH signaling. PLoS Genetics |
| title | IKAROS is required for the measured response of NOTCH target genes upon external NOTCH signaling. |
| title_full | IKAROS is required for the measured response of NOTCH target genes upon external NOTCH signaling. |
| title_fullStr | IKAROS is required for the measured response of NOTCH target genes upon external NOTCH signaling. |
| title_full_unstemmed | IKAROS is required for the measured response of NOTCH target genes upon external NOTCH signaling. |
| title_short | IKAROS is required for the measured response of NOTCH target genes upon external NOTCH signaling. |
| title_sort | ikaros is required for the measured response of notch target genes upon external notch signaling |
| url | https://journals.plos.org/plosgenetics/article/file?id=10.1371/journal.pgen.1009478&type=printable |
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