ETS transcription factor Etsrp / Etv2 is required for lymphangiogenesis and directly regulates vegfr3 / flt4 expression

Jennifer A. Davis, Andrew L. Koenig, Allison Lubert, Brendan Chestnut, Fang Liu, Sharina Palencia Desai, Tamara Winkler, Karolina Pociute, Kyunghee Choi, Saulius Sumanas

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

The molecular mechanisms initiating the formation of the lymphatic system, lymphangiogenesis, are still poorly understood. Here we have identified a novel role in lymphangiogenesis for an ETS transcription factor, Etv2/Etsrp, a known regulator of embryonic vascular development. Through the use of fully validated photoactivatable morpholinos we show that inducible Etv2 inhibition in zebrafish embryos at 1 day post-fertilization (dpf) results in significant inhibition of lymphangiogenesis, while development of blood vessels is unaffected. In Etv2-inhibited embryos and larvae, the number of lymphatic progenitors is greatly reduced, the major lymphatic vessel, the thoracic duct, is absent or severely fragmented, and lymphangiogenesis-associated marker expression, including lyve1b, prox1a, and vegfr3/flt4, is strongly downregulated. We also demonstrate that lymphatic progenitors in Etv2 deficient embryos fail to respond to Vegfc signaling. Chromatin immunoprecipitation and sequencing (ChIP-Seq) studies using differentiated mouse embryonic stem (ES) cells as well as luciferase reporter studies in the ES cells and in zebrafish embryos argue that Etv2 directly binds the promoter/enhancer regions of Vegfc receptor Vegfr3/Flt4 and lymphatic marker Lyve1, and promotes their expression. Together these data support a model where Etv2 initiates lymphangiogenesis by directly promoting the expression of flt4 within the posterior cardinal vein.

Original languageEnglish
Pages (from-to)40-52
Number of pages13
JournalDevelopmental Biology
Volume440
Issue number1
DOIs
StatePublished - Aug 1 2018

Keywords

  • ETS transcription factors
  • Etsrp
  • Etv2
  • Flt4
  • Lymphangiogenesis
  • Lymphatics
  • Thoracic duct
  • Vegfc
  • Vegfr3
  • Zebrafish

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    Davis, J. A., Koenig, A. L., Lubert, A., Chestnut, B., Liu, F., Palencia Desai, S., Winkler, T., Pociute, K., Choi, K., & Sumanas, S. (2018). ETS transcription factor Etsrp / Etv2 is required for lymphangiogenesis and directly regulates vegfr3 / flt4 expression. Developmental Biology, 440(1), 40-52. https://doi.org/10.1016/j.ydbio.2018.05.003