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Updated: Jun 22, 2026
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Assessing Collagen and Elastin Pressure-dependent Microarchitectures in Live, Human Resistance Arteries by Label-free Fluorescence Microscopy
Published on: April 9, 2018
Transmural pressure and axial loading interactively regulate arterial remodeling ex vivo
Amanda R Lawrence1, Keith J Gooch
1Department of Bioengineering and Institute for Medicine and Engineering, University of Pennsylvania, Philadelphia, PA, USA.
Summary
Arterial remodeling is significantly influenced by axial strain, not just blood pressure. Reduced axial strain leads to mass loss and altered contractility, highlighting its primary role in vascular changes.
Area of Science:
- Vascular Biology
- Biomedical Engineering
- Cardiovascular Physiology
Background:
- Arterial walls experience physiological axial strains of 40-60%.
- Axial strain contributes to stresses comparable to blood pressure and flow.
- The role of axial strain in arterial remodeling requires further investigation.
Purpose of the Study:
- To investigate the contribution of axial strain to arterial remodeling and function.
- To compare the effects of physiological and reduced axial stretch ratios on arterial properties.
- To assess the interplay between axial strain and transmural pressure in vascular remodeling.
Main Methods:
- Porcine carotid arteries were cultured ex vivo for 9 days.
- Vessels were subjected to physiological and reduced axial stretch ratios.
- Cultures were exposed to normotensive and hypertensive transmural pressures.
Main Results:
- Physiological axial strain with hypertensive pressure increased vessel mass, wall area, and outer diameter.
- Reduced axial strain led to mass loss and decreased cell proliferation.
- Reduced axial strain under hypertensive pressure enhanced contractility; GM6001 inhibited mass loss.
Conclusions:
- Axial strain is a primary mediator of vascular remodeling, with an impact similar to or greater than transmural pressure.
- Reduced axial strain negatively affects arterial mass and cell proliferation.
- Axial strain is a critical, though historically underestimated, factor in arterial remodeling and function.
