Elongation of the developing spinal cord is driven by Oct4-type transcription factor-mediated regulation of retinoic acid signaling in zebrafish embryos
{"title":"Elongation of the developing spinal cord is driven by Oct4-type transcription factor-mediated regulation of retinoic acid signaling in zebrafish embryos","authors":"Tatsuya Yuikawa, Takehisa Sato, Masaaki Ikeda, Momo Tsuruoka, Kaede Yasuda, Yuto Sato, Kouhei Nasu, Kyo Yamasu","doi":"10.1002/dvdy.666","DOIUrl":null,"url":null,"abstract":"<div>\n \n \n <section>\n \n <h3> Background</h3>\n \n <p>Elongation of the spinal cord is dependent on neural development from neuromesodermal progenitors in the tail bud. We previously showed the involvement of the <i>Oct4</i>-type gene, <i>pou5f3</i>, in this process in zebrafish mainly by dominant-interference gene induction, but, to compensate for the limitation of this transgene approach, mutant analysis was indispensable. <i>pou5f</i>3 involvement in the signaling pathways was another unsolved question.</p>\n </section>\n \n <section>\n \n <h3> Results</h3>\n \n <p>We examined the phenotypes of <i>pou5f3</i> mutants and the effects of Pou5f3 activation by the tamoxifen-ERT2 system in the posterior neural tube, together confirming the involvement of <i>pou5f3</i>. The reporter assays using P19 cells implicated tail bud-related transcription factors in <i>pou5f3</i> expression. Regulation of tail bud development by retinoic acid (RA) signaling was confirmed by treatment of embryos with RA and the synthesis inhibitor, and in vitro reporter assays further showed that RA signaling regulated <i>pou5f3</i> expression. Importantly, the expression of the RA degradation enzyme gene, <i>cyp26a1</i>, was down-regulated in embryos with disrupted <i>pou5f3</i> activity.</p>\n </section>\n \n <section>\n \n <h3> Conclusions</h3>\n \n <p>The involvement of <i>pou5f3</i> in spinal cord extension was supported by using mutants and the gain-of-function approach. Our findings further suggest that <i>pou5f3</i> regulates the RA level, contributing to neurogenesis in the posterior neural tube.</p>\n </section>\n </div>","PeriodicalId":11247,"journal":{"name":"Developmental Dynamics","volume":"253 4","pages":"404-422"},"PeriodicalIF":2.0000,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/dvdy.666","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Developmental Dynamics","FirstCategoryId":"99","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/dvdy.666","RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ANATOMY & MORPHOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Background
Elongation of the spinal cord is dependent on neural development from neuromesodermal progenitors in the tail bud. We previously showed the involvement of the Oct4-type gene, pou5f3, in this process in zebrafish mainly by dominant-interference gene induction, but, to compensate for the limitation of this transgene approach, mutant analysis was indispensable. pou5f3 involvement in the signaling pathways was another unsolved question.
Results
We examined the phenotypes of pou5f3 mutants and the effects of Pou5f3 activation by the tamoxifen-ERT2 system in the posterior neural tube, together confirming the involvement of pou5f3. The reporter assays using P19 cells implicated tail bud-related transcription factors in pou5f3 expression. Regulation of tail bud development by retinoic acid (RA) signaling was confirmed by treatment of embryos with RA and the synthesis inhibitor, and in vitro reporter assays further showed that RA signaling regulated pou5f3 expression. Importantly, the expression of the RA degradation enzyme gene, cyp26a1, was down-regulated in embryos with disrupted pou5f3 activity.
Conclusions
The involvement of pou5f3 in spinal cord extension was supported by using mutants and the gain-of-function approach. Our findings further suggest that pou5f3 regulates the RA level, contributing to neurogenesis in the posterior neural tube.
期刊介绍:
Developmental Dynamics, is an official publication of the American Association for Anatomy. This peer reviewed journal provides an international forum for publishing novel discoveries, using any model system, that advances our understanding of development, morphology, form and function, evolution, disease, stem cells, repair and regeneration.