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In Vitro Generation of Heart Field-specific Cardiac Progenitor Cells
Published on: July 3, 2019
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Epithelial Properties of the Second Heart Field
Claudio Cortes1, Alexandre Francou1, Christopher De Bono1
1From Aix-Marseille University, CNRS UMR 7288, Developmental Biology Institute of Marseille, France.
Circulation Research
|January 6, 2018
Summary
Proper epithelial cell regulation in the second heart field (SHF) is crucial for embryonic heart tube elongation. Disruptions in SHF cell properties can lead to congenital heart defects.
Area of Science:
- Developmental Biology
- Regenerative Medicine
- Cardiovascular Research
Background:
- The vertebrate heart tube elongates via the addition of second heart field (SHF) progenitor cells.
- Failure in heart tube elongation causes congenital heart defects, such as outflow tract and atrioventricular septal defects.
- SHF cells form a unique polarized epithelium with basal filopodia, crucial for cardiac development.
Purpose of the Study:
- To investigate the role of epithelial properties in SHF progenitor cells during heart tube elongation.
- To understand how Tbx1 and noncanonical Wnt signaling influence SHF cell behavior and cardiac morphogenesis.
- To explore biomechanical models of heart tube elongation driven by epithelial morphogenesis.
Main Methods:
- Analysis of epithelial architecture and cell adhesion in SHF progenitor cells.
- Investigating the function of Tbx1 in modulating cell shape and filopodial activity.
- Examining the role of noncanonical Wnt and planar cell polarity pathways in epithelial polarity.
- Applying biomechanical modeling to understand tissue-wide forces in SHF epithelial morphogenesis.
Main Results:
- Tbx1 regulates SHF progenitor cell status by affecting cell shape and filopodial activity, impacting contributions to cardiac poles.
- Noncanonical Wnt and planar cell polarity pathways control epithelial polarity in the dorsal pericardial wall, with defects causing outflow tract shortening.
- Biomechanical models highlight the importance of cell intercalation, cohesion, and epithelial tension in SHF-driven heart tube elongation.
Conclusions:
- Regulation of SHF epithelial cell properties is a key mechanism in heart tube elongation.
- Understanding these mechanisms provides new insights into heart morphogenesis and congenital heart defects.
- Targeting epithelial properties offers potential therapeutic avenues for congenital heart anomalies.
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