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Related Experiment Video

Updated: May 28, 2026

Neonatal Cardiac Scaffolds: Novel Matrices for Regenerative Studies
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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
PubMed
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This summary is machine-generated.

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.
Keywords:
biomaterialdecellularizationrecellularizationtissue engineeringxenograft

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Last Updated: May 28, 2026

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  • 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.