Related Experiment Video
Updated: Nov 10, 2025
10:54
Tunable Hydrogels from Pulmonary Extracellular Matrix for 3D Cell Culture
Published on: January 17, 2017
11.9K
Incorporating a structural extracellular matrix gradient into a porcine urinary bladder matrix-based hydrogel dermal
Jules D Allbritton-King1,2, Megan Kimicata2,3, John P Fisher1,2
1Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA.
Journal of Biomedical Materials Research. Part A
|April 2, 2021
Summary
This study developed a graded-concentration hydrogel scaffold from porcine urinary bladder matrix (UBM) to improve chronic wound healing. The novel scaffold design enhances structural integrity and cellular activity, offering a promising solution for nonhealing wounds.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Tissue Engineering
Background:
- Chronic, nonhealing wounds require advanced skin substitutes for effective closure.
- Extracellular matrix (ECM)-based hydrogels offer a promising microenvironment for dermal cells.
- Existing ECM hydrogels face limitations due to mechanical instability or poor cell/nutrient diffusion.
Purpose of the Study:
- To design and fabricate a graded-concentration hydrogel scaffold using decellularized porcine urinary bladder matrix (dUBM).
- To evaluate the mechanical stability, cellular compatibility, and wound healing potential of the gradient dUBM hydrogel.
- To address the limitations of uniform-concentration ECM hydrogels in chronic wound treatment.
Main Methods:
- Isolation and decellularization of porcine urinary bladder matrix (UBM) to obtain dUBM.
- Fabrication of hydrogels with varying dUBM concentrations and creation of a three-tiered gradient hydrogel.
- Characterization of hydrogel mechanical properties, degradation resistance (collagenase), and fibroblast-mediated contraction.
- Assessment of cell viability and proliferation on the gradient hydrogel scaffold.
Main Results:
- The gradient dUBM hydrogel maintained structural integrity during degradation, showing stability in cross-sectional area.
- The scaffold effectively resisted fibroblast-mediated contraction, indicating superior mechanical support.
- High cell viability was observed on the surface of the gradient hydrogel, supporting cellular activity.
- The gradient design successfully combined the benefits of high and low ECM concentrations.
Conclusions:
- A graded-concentration dUBM hydrogel scaffold demonstrates enhanced mechanical stability and pro-regenerative properties for chronic wound healing.
- This gradient design overcomes the limitations of uniform ECM hydrogels, offering improved efficacy for wound closure.
- The developed scaffold shows potential for future 3D-printed, customized wound healing solutions.
