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Updated: May 28, 2026
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Neonatal Cardiac Scaffolds: Novel Matrices for Regenerative Studies
Published on: November 5, 2016
Effective Recellularization Using Mesenchymal Stem Cell Monoculture for Next-Generation Heart Valves
So Young Kim1, Ja-Kyoung Yoon2, Serin Kim1
1Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul 03080, Republic of Korea.
Bioengineering (Basel, Switzerland)
|May 27, 2026
Summary
This study developed major xenoantigen-free scaffolds using enzyme treatments, proving effective in vitro recellularization with human mesenchymal stem cells (MSCs) and showing potential for in vivo applications.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Immunology
Background:
- Eliminating xenoimmunogenicity and achieving recellularization in cardiac xenografts are key challenges for implantable xenografts.
- Previous work showed that removing Galα1-3Gal (α-Gal) and N-glycolylneuraminic acid (Neu5Gc) with α-galactosidase and PNGase-F synergizes with decellularization, reducing lectin expression without affecting biomechanical properties.
Purpose of the Study:
- To establish an effective in vitro recellularization method using human mesenchymal stem cells (MSCs) on decellularized cardiac xenografts with optimal xenoantigen removal.
- To evaluate the potential for in vivo recellularization of these modified xenografts.
Main Methods:
- Decellularized porcine pericardium scaffolds underwent xenoantigen removal using α-galactosidase and PNGase-F.
- Scaffolds were modified with a fibrin mesh, heparin, and vascular endothelial growth factor, then seeded with human adipose tissue-derived stem cells for 8 weeks for in vitro assessment.
- For in vivo evaluation, decellularized, crosslinked, and anticalcified xenografts were seeded with rat bone marrow MSCs and implanted subcutaneously in rats.
Main Results:
- Enzyme-treated decellularized xenografts showed significantly faster mesenchymal cell infiltration and accelerated in vitro recellularization, with increased cell differentiation over time.
- In vivo studies demonstrated enhanced vimentin staining in decellularized and anticalcified scaffolds.
- Recellularized scaffolds exhibited a lower degree of calcification compared to non-recellularized tissue.
Conclusions:
- Major xenoantigen-free scaffolds were successfully developed, demonstrating the safety and synergistic effects of α-galactosidase and PNGase-F treatments.
- The study proved the effectiveness of in vitro recellularization using human MSC monoculture on these xenoantigen-free scaffolds.
- The potential for in vivo recellularization of these biocompatible scaffolds seeded with MSCs was confirmed.
