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Perfusion-decellularized matrix: using nature's platform to engineer a bioartificial heart.

Harald C Ott1, Thomas S Matthiesen, Saik-Kia Goh

  • 1Department of Surgery, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, Boston, Massachusetts 02114, USA.

Nature Medicine
|January 15, 2008
PubMed
Summary

Researchers engineered a bioartificial heart by decellularizing donor hearts and reseeding them with cardiac cells. The resulting constructs demonstrated contractile function and pump capacity, offering a potential alternative to heart transplantation.

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Area of Science:

  • Biomedical Engineering
  • Regenerative Medicine
  • Cardiovascular Research

Background:

  • Heart failure affects millions globally, with limited donor hearts available for transplantation.
  • Current treatments include mechanical support devices and transplantation, both with limitations.
  • A bioartificial heart offers a potential alternative by combining engineered cardiac architecture with cellular components.

Purpose of the Study:

  • To engineer a functional bioartificial heart using decellularized cardiac scaffolds and cellular reseeding.
  • To assess the structural integrity and functional capacity of the engineered bioartificial heart.
  • To evaluate the potential of bioartificial hearts as an alternative to current heart failure therapies.

Main Methods:

  • Donor hearts were decellularized using detergent perfusion to preserve the extracellular matrix and vascular architecture.
  • Acellular valves and chamber geometry were maintained throughout the decellularization process.
  • Constructs were reseeded with cardiac and endothelial cells and cultured in a bioreactor simulating cardiac physiology for up to 28 days.

Main Results:

  • Decellularization successfully preserved the cardiac extracellular matrix, vascular network, valves, and chamber structure.
  • Reseeded constructs exhibited macroscopic contractions by day 4.
  • By day 8, engineered hearts generated pump function equivalent to approximately 2% of adult or 25% of fetal heart capacity under physiological load and electrical stimulation.

Conclusions:

  • This study demonstrates the feasibility of engineering a bioartificial heart with preserved architecture and initial pump function.
  • The developed bioartificial heart shows promise as a potential future therapy for heart failure.
  • Further development is needed to enhance pump function for clinical viability.