A Myc-slug (Snail 2)/Twist regulatory circuit directs vascular development

Claudia O. Rodrigues, Steve T. Nerlick, Elsie L. White, John L. Cleveland, Mary Lou King

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

Myc-deficient mice fail to develop normal vascular networks and Myc-deficient embryonic stem cells fail to provoke a tumor angiogenic response when injected into immune compromised mice. However, the molecular underpinnings of these defects are poorly understood. To assess whether Myc indeed contributes to embryonic vasculogenesis we evaluated Myc function in Xenopus laevis embryogenesis. Here, we report that Xc-Myc is required for the normal assembly of endothelial cells into patent vessels during both angiogenesis and lymphangiogenesis. Accordingly, the specific knockdown of Xc-Myc provokes massive embryonic edema and hemorrhage. Conversely, Xc-Myc overexpression triggers the formation of ectopic vascular beds in embryos. Myc is required for normal expression of Slug/Snail2 and Twist, and either XSlug/Snail2 or XTWist could compensate for defects manifest by Xc-Myc knockdown. Importantly, knockdown of Xc-Myc, XSlug/Snail2 or XTwist within the lateral plate mesoderm, but not the neural crest, provoked embryonic edema and hemorrhage. Collectively, these findings support a model in which Myc, Twist and Slug/Snail2 function in a regulatory circuit within lateral plate mesoderm that directs normal vessel formation in both the vascular and lymphatic systems.

Original languageEnglish (US)
Pages (from-to)1903-1911
Number of pages9
JournalDevelopment
Volume135
Issue number11
DOIs
StatePublished - Jun 2008

Keywords

  • Lymphangiogenesis
  • Myc
  • Slug/Snail2
  • Twist
  • Vasculogenesis
  • Xenopus

ASJC Scopus subject areas

  • Anatomy
  • Cell Biology
  • Developmental Biology
  • Molecular Biology

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