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Histologic Characteristics and Mechanical Properties of Bovine Pericardium Treated with Decellularization and ${\alpha}$-Galactosidase: A Comparative Study

  • Min, Byoung-Ju (Department of Thoracic and Cardiovascular Surgery, Seoul National University College of Medicine) ;
  • Kim, Yong Jin (Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul National University College of Medicine) ;
  • Choi, Jae-Woong (Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul National University College of Medicine) ;
  • Choi, Sun Young (Department of Thoracic and Cardiovascular Surgery, Seoul National University College of Medicine) ;
  • Kim, Soo Hwan (Department of Thoracic and Cardiovascular Surgery, Seoul National University College of Medicine) ;
  • Lim, Hong-Gook (Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Seoul National University College of Medicine)
  • Received : 2010.09.15
  • Accepted : 2011.02.08
  • Published : 2012.12.05

Abstract

Background: Bioprostheses for cardiovascular surgery have limitations in their use following as calicification. ${\alpha}$-galactosidase epitope is known as a stimulant of immune response and then shows a progressing calcification. The objective of this study was to evaluate histologic characteristics and mechanical properties of decellularization and treated with ${\alpha}$-galactosidase. Materials and Methods: Bovine pericardial tissues were allocated into three groups: fixation only with glutaraldehyde, decellularization with sodium dodesyl sulfate and decellularization plus treatment with ${\alpha}$-galactosidase. We confirmed immunohistological characteristics and mechanical properties as fatigue test, permeability test, compliance test, tensile strength (strain) test and thermal stability test. Results: Decellularization and elimination of ${\alpha}$-gal were confirmed through immunohistologic findings. Decellularization had decreased mechanical properties compared to fixation only group in permeability (before fatigue test p=0.02, after fatigue test p=0.034), compliance (after fatigue test p=0.041), and tensile strength test (p=0.00). The group of decellularization plus treatment with ${\alpha}$-galactosidase had less desirable mechanical properties than the group of decellularization in concerns of permeability (before fatigue test p=0.043) and strain test (p=0.001). Conclusion: Favorable decellularization and elimination of ${\alpha}$-gal were obtained in this study through immunohistologic findings. However, those treatment including decellularization and elimination of ${\alpha}$-gal implied the decreased mechanical properties in specific ways. We need more study to complete appropriate bioprosthesis with decellularization and elimination of ${\alpha}$-gal including favorable mechanical properties too.

Keywords

References

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