Related Experiment Videos
Correlation of endothelial vimentin content with hemodynamic parameters
H J Schnittler1, T Schmandra, D Drenckhahn
1Department of Anatomy, University of Würzburg, Germany. schnith@uni-muenster.de
Histochemistry and Cell Biology
|August 28, 1998
Summary
Endothelial cells in high-stress heart and blood vessel regions have more vimentin, an intermediate filament protein. This suggests vimentin helps endothelial cells withstand mechanical forces from blood flow and pressure.
Area of Science:
- Cardiovascular Biology
- Cellular Biophysics
Background:
- Vimentin is the primary intermediate filament protein in mammalian endothelial cells.
- Quantitative differences in vimentin expression exist across various vascular segments.
Purpose of the Study:
- To systematically survey endothelial vimentin content in the pig cardiovascular system.
- To investigate the relationship between hemodynamic load and endothelial vimentin expression.
Main Methods:
- Immunostaining and immunoblotting techniques were employed.
- Analysis covered the heart chambers, vena cava, pulmonary trunk, and aorta.
Main Results:
- Endothelial cells in high shear stress/pressure areas (pulmonary trunk, aorta, left ventricle) showed 2-3 fold higher vimentin than low-stress areas (vena cava, atria, right ventricle).
- Vimentin content increased proximally to distally along the aorta (approx. 1.5-fold).
- Endothelial vimentin constituted 1.2% (vena cava) to 2-3.5% (aorta) of total cellular protein.
Conclusions:
- Endothelial vimentin levels correlate with hemodynamic load.
- The vimentin cytoskeleton likely plays a crucial role in endothelial adaptation to mechanical forces.
- Vimentin may enhance endothelial cell resilience against blood flow and pressure stresses.