Sox2 gene regulation via the D1 enhancer in embryonic neural tube and neural crest by the combined action of SOX2 and ZIC2
| Autor: | Hitomi Suzuki, Tatsuya Takemoto, Hisato Kondoh, Masanori Uchikawa, Hideaki Iida, Yoko Furukawa, Machiko Teramoto |
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| Rok vydání: | 2020 |
| Předmět: |
Neural Tube
Chick Embryo Biology 03 medical and health sciences Mice SOX2 Genetics medicine Animals Enhancer Transcription factor 030304 developmental biology Regulation of gene expression 0303 health sciences SOXB1 Transcription Factors fungi Neural tube Neural crest Cell Biology Embryo Mammalian Embryonic stem cell Cell biology medicine.anatomical_structure Enhancer Elements Genetic Neural Crest embryonic structures Chromatin immunoprecipitation Chickens Transcription Factors |
| Zdroj: | Genes to cells : devoted to molecularcellular mechanismsREFERENCES. 25(4) |
| ISSN: | 1365-2443 |
| Popis: | The transcription factor (TF) SOX2 regulates various stem cells and tissue progenitors via functional interactions with cell type-specific partner TFs that co-bind to enhancer sequences. Neural progenitors are the major embryonic tissues where SOX2 assumes central regulatory roles. In order to characterize the partner TFs of SOX2 in neural progenitors, we investigated the regulation of the D1 enhancer of the Sox2 gene, which is activated in the embryonic neural tube (NT) and neural crest (NC), using chicken embryo electroporation. We identified essential TF binding sites for a SOX, and two ZIC TFs in the activation of the D1 enhancer. By comparison of dorso-ventral and antero-posterior patterns of D1 enhancer activation, and the effect of mutations on the enhancer activation patterns with TF expression patterns, we determined SOX2 and ZIC2 as the major D1 enhancer-activating TFs. Binding of these TFs to the D1 enhancer sequence was confirmed by chromatin immunoprecipitation analysis. The combination of SOX2 and ZIC2 TFs activated the enhancer in both the NT and NC. These results indicate that SOX2 and ZIC2, which have been known to play major regulatory roles in neural progenitors, do functionally cooperate. In addition, the recently demonstrated SOX2 expression during the NC development is accounted for at least partly by the D1 enhancer activity. Deletion of the D1 enhancer sequence from the mouse genome, however, did not affect the mouse development, indicating functional redundancies of other enhancers. |
| Databáze: | OpenAIRE |
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