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Updated: May 23, 2026

Isolation of Human Primary Valve Cells for In vitro Disease Modeling
Published on: April 16, 2021
Heart valve development, maintenance, and disease: the role of endothelial cells
Ge Tao1, James D Kotick, Joy Lincoln
1Molecular Cell and Developmental Biology Graduate Program, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida, USA.
Insights
Valvular endothelial cells (VECs) are crucial for heart valve structure and function. Disruptions in VECs are linked to valve disease, highlighting potential for endothelial cell-based therapies.
Area of Science:
- Cardiovascular Biology
- Cell Biology
- Biomedical Engineering
Background:
- Heart valves ensure unidirectional blood flow, but congenital defects can cause failure.
- Valve leaflets comprise interstitial cells, extracellular matrix, and endothelial cells, forming a critical architecture.
- Valvular endothelial cells (VECs) are vital for embryonic development and lifelong valve integrity.
Purpose of the Study:
- To explore the role of VECs in heart valve development and disease.
- To understand how VEC integrity impacts valve function and pathology.
- To identify potential for VEC-based therapeutic strategies for valvular heart disease.
Main Methods:
- Review of existing literature on VEC biology and valve disease.
- Analysis of cellular and structural components of heart valves.
- Investigation of pathological processes involving VEC disruption.
Main Results:
- VEC integrity is essential for maintaining normal valve architecture and biomechanics.
- Disruption of VECs is a common feature in malfunctioning heart valves.
- VEC abnormalities are associated with valve sclerosis and calcification.
Conclusions:
- VECs play indispensable roles in heart valve development and maintenance.
- VEC dysfunction contributes significantly to the pathogenesis of valvular heart disease.
- Endothelial cell-based therapies show promise for treating heart valve conditions.
Abstract:
Heart valves are dynamic structures that open and close during the cardiac cycle to maintain unidirectional blood flow throughout life. Insufficient valve function, commonly due to congenital malformations leads to disruptions in hemodynamics and eventual heart failure. Mature valve leaflets are composed of a heterogeneous population of interstitial cells and stratified extracellular matrix, surrounded by a layer of endothelial cells. This defined connective tissue "architecture" provides the valve with all the necessary biomechanical properties required to efficiently function while withstanding constant cyclic shear stress. Valvular endothelial cells (VECs) play essential roles in establishing the valve structures during embryonic development and are important for maintaining lifelong valve integrity and function. In contrast to a continuous endothelium over the surface of healthy valve leaflets, VEC disruption is commonly observed in malfunctioning valves and is associated with pathological processes that promote valve sclerosis and calcification. Increasing our understanding of the roles of VECs in development and disease has lead to promising advances in the development of endothelial cell-based therapies for treating valve disease.
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