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A Novel Ex Ovo Banding Technique to Alter Intracardiac Hemodynamics in an Embryonic Chicken System
Published on: May 13, 2016
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Altered Hemodynamics in the Embryonic Heart Affects Outflow Valve Development.
Vinal Menon1, John F Eberth2, Richard L Goodwin3
1Department of Cell Biology and Anatomy, School of Medicine, University of South Carolina, Columbia, SC 29209, USA.
Journal of Cardiovascular Development and Disease
|February 16, 2016
Summary
Altering blood flow during embryonic development impacts heart valve formation. Increased blood flow (hemodynamics) reduced key developmental processes, highlighting its crucial role in preventing congenital heart defects.
Area of Science:
- Developmental Biology
- Cardiovascular Research
- Biophysics
Background:
- Congenital heart defects, often due to abnormal heart valve development, are a significant clinical concern.
- Epithelial-to-mesenchymal transition (EMT) is critical for heart valve formation.
- The influence of hemodynamics on EMT during valve development remains poorly understood.
Purpose of the Study:
- To investigate the role of intracardiac hemodynamics in regulating EMT during heart valve development.
- To determine how altered blood flow affects embryonic heart valve structure and gene expression.
Main Methods:
- Hemodynamics were manipulated in chicken embryos (HH stages 16-17) by constricting the outflow tract/ventricle junction.
- Computational fluid dynamics (CFD) estimated wall shear stresses.
- OFT cushion volume, mesenchymal invasion, and gene expression (qPCR) were analyzed.
Main Results:
- OFT constriction increased blood flow velocity but not volume or heart rate.
- Constriction significantly reduced OFT cushion volume and mesenchymal cell invasion.
- Key gene expression vital for valve development was altered in response to altered hemodynamics.
Conclusions:
- Intracardiac hemodynamics play a crucial role in regulating EMT during heart valve development.
- Altered blood flow patterns negatively impact embryonic valve formation.
- Understanding hemodynamic regulation is essential for addressing congenital heart defects.
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