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Updated: Feb 7, 2026
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A Model of Reverse Vascular Remodeling in Pulmonary Hypertension Due to Left Heart Disease by Aortic Debanding in Rats
Published on: March 1, 2022
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Mechanical pressure unloading therapy reverses thoracic aortic structural and functional changes in a hypertensive
Sevil Korkmaz-Icöz1, Paige Brlecic1, Mihály Ruppert1,2
1Department of Cardiac Surgery, Heidelberg University Hospital, Heidelberg, Germany.
Journal of Hypertension
|July 26, 2018
Summary
Mechanical unloading reversed hypertension-induced vascular changes in rats. Pressure unloading therapy improved blood vessel function and reduced structural damage, suggesting new treatment strategies for hypertension.
Area of Science:
- Cardiovascular biology
- Vascular physiology
- Hypertension research
Background:
- Hypertension significantly impacts blood vessel structure and function.
- Limited experimental data exists on vascular reverse remodeling following mechanical pressure unloading therapies.
Purpose of the Study:
- To investigate the effects of mechanical pressure unloading on structural and functional vascular alterations in a hypertensive rat model.
- To assess the reversibility of hypertension-induced vascular changes through pressure unloading.
Main Methods:
- Utilized an in-vitro organ bath system with isolated thoracic aortic rings from hypertensive rats subjected to abdominal aortic banding.
- Assessed vasorelaxation, aortic morphometry, histological fibrosis, and mRNA expression of MMP-2, TIMP-2, GUCY1a3, and GUCY1b3.
- Compared groups with 6-week or 12-week aortic banding and a debanding group after 6 weeks of banding.
Main Results:
- Aortic banding led to increased blood pressure, structural changes (thickened intima-media, increased collagen, altered MMP-2/TIMP-2/GUCY1a3/GUCY1b3 mRNA), and impaired vasorelaxation.
- Mechanical unloading via debanding improved vascular function and reduced collagen content.
- Debanding also decreased MMP-2 and TIMP-2 mRNA expression, indicating a reversal of remodeling.
Conclusions:
- Pressure-overload-induced vascular changes are reversible with mechanical unloading.
- Debanding reduced fibrosis-associated gene expression and collagen accumulation.
- Targeting fibrosis in conjunction with antihypertensive treatments may offer a novel therapeutic approach for vascular remodeling.
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