Co-ordinating Notch, BMP, and TGF-β signaling during heart valve development

Victoria C. Garside, Alex C Y Chang, Aly Karsan, Pamela A. Hoodless

Research output: Contribution to journalReview ArticleResearchpeer-review

63 Citations (Scopus)


Congenital heart defects affect approximately 1-5 % of human newborns each year, and of these cardiac defects 20-30 % are due to heart valve abnormalities. Recent literature indicates that the key factors and pathways that regulate valve development are also implicated in congenital heart defects and valve disease. Currently, there are limited options for treatment of valve disease, and therefore having a better understanding of valve development can contribute critical insight into congenital valve defects and disease. There are three major signaling pathways required for early specification and initiation of endothelial-to-mesenchymal transformation (EMT) in the cardiac cushions: BMP, TGF-β, and Notch signaling. BMPs secreted from the myocardium set up the environment for the overlying endocardium to become activated; Notch signaling initiates EMT; and both BMP and TGF-β signaling synergize with Notch to promote the transition of endothelia to mesenchyme and the mesenchymal cell invasiveness. Together, these three essential signaling pathways help form the cardiac cushions and populate them with mesenchyme and, consequently, set off the cascade of events required to develop mature heart valves. Furthermore, integration and cross-talk between these pathways generate highly stratified and delicate valve leaflets and septa of the heart. Here, we discuss BMP, TGF-β, and Notch signaling pathways during mouse cardiac cushion formation and how they together produce a coordinated EMT response in the developing mouse valves.

Original languageEnglish
Pages (from-to)2899-2917
Number of pages19
JournalCellular and Molecular Life Sciences
Issue number16
Publication statusPublished - Aug 2013
Externally publishedYes


  • BMP
  • Cross-talk
  • Heart valve development
  • Notch
  • TGF-β

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