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Updated: May 20, 2025

A Model of Reverse Vascular Remodeling in Pulmonary Hypertension Due to Left Heart Disease by Aortic Debanding in Rats
Published on: March 1, 2022
Homeostatic Role of Decorin in Right Ventricular Pressure Overload and Pulmonary Hypertension Induced Remodeling
Yohei Akazawa1, Sriram Vaidyanathan2, Michael Bradley Dewar3
1Division of Cardiology, Labatt Family Heart Centre, Hospital for Sick Children, Toronto, Ontario, Canada.
Abstract:
Right ventricular (RV) pressure loading induces RV profibrotic signaling and fibrosis associated with RV dysfunction. RV decorin protein levels are decreased in patients with chronic RV pressure loading. RV decorin protein levels are also decreased in 4 animal models of mechanical RV pressure loading and pulmonary arterial hypertension. Human cardiac fibroblasts overexpressing decorin show diminished collagen-1 secretion in response to mechanical or chemical profibrotic stress while decorin knockout human cardiac fibroblasts show increased collagen-1 secretion in response to stress. Downregulation of decorin may play a key role in upregulating transforming growth factor-β1 profibrotic signaling and fibrosis that contribute to RV dysfunction in RV pressure loading.
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