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Micropatterning and Assembly of 3D Microvessels
Published on: September 9, 2016
Engineering a Matrix-Preserving Vascular dECM Platform with Tunable Stiffness for In Vitro Vascular Remodeling
Yuna Heo1,2, Rhonda Drewes3,4, Se-Hwan Lee1
1McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.
Biorxiv : the Preprint Server for Biology
|May 25, 2026
Summary
Researchers created a new scaffold using decellularized extracellular matrix (dECM) and methacrylated hyaluronic acid (MeHA) to study arterial stiffening. This platform mimics the diseased vascular microenvironment, revealing how stiffness influences vascular smooth muscle cell (VSMC) behavior and identifies YAP and survivin as key regulators.
Area of Science:
- Biomedical Engineering
- Vascular Biology
- Biomaterials Science
Background:
- Pathologic arterial stiffening is a key feature of vascular disease, driving maladaptive vascular remodeling and neointimal hyperplasia via vascular smooth muscle cell (VSMC) phenotypic switching.
- Existing in vitro models struggle to replicate the complex interplay of biomechanical and extracellular matrix (ECM) factors in the diseased vascular microenvironment.
Purpose of the Study:
- To develop a novel, bioactive composite scaffold platform using decellularized extracellular matrix (dECM) and methacrylated hyaluronic acid (MeHA).
- To create a tunable stiffness scaffold that preserves native vascular ECM components for investigating stiffness-dependent VSMC behavior.
- To model mechanobiologically relevant aspects of stiffness-driven vascular remodeling.
Main Methods:
- Fabrication of a composite scaffold from dECM and MeHA with tunable stiffness.
- Proteomic analysis to confirm retention of vascular matrisome components.
- Culture of human VSMCs on scaffolds with varying stiffness and assessment of cell morphology, phenotype, and gene expression.
Main Results:
- The dECM/MeHA scaffolds retained key vascular ECM components and mimicked the stiffness of healthy and diseased arteries.
- VSMCs cultured on stiff scaffolds showed increased spreading, altered morphology, and nuclear localization of YAP and survivin.
- Transcriptional analysis indicated a shift in VSMCs toward a proliferative, matrix-remodeling phenotype on stiff scaffolds.
Conclusions:
- The developed bioactive, matrix-preserving scaffold platform enables mechanistically relevant modeling of vascular stiffness.
- The findings highlight the role of YAP and survivin as potential regulators in stiffness-induced maladaptive VSMC mechanotransduction.
- This platform facilitates further research into the biomechanics of vascular disease progression.
