Regenerative potential of low-concentration SDS-decellularized porcine aortic valved conduits in vivo

© 2015 Mary Ann Liebert, Inc. The aims of this study were to determine the functional biocompatibility of low-concentration SDS-decellularized porcine aortic roots in vivo. A previously developed process was modified for 9-And 15-mm-diameter aortic roots to facilitate implantation into the porcine a...

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Main Authors: José Rodolfo Paniagua Gutierrez, Helen Berry, Sotiris Korossis, Saeed Mirsadraee, Sergio Veiga Lopes, Francisco da Costa, John Kearney, Kevin Watterson, John Fisher, Eileen Ingham
Format: Article
Language:English
Subjects:
Animals
Aorta
Aortic Valve
Biochemistry and Cell Biology
Biomechanical Phenomena
Biomedical Engineering
Calcium
Cell & Tissue Engineering
Cell Biology
CONGENITAL HEART-DISEASE
Engineering
Engineering, Biomedical
FAILURE
Female
Heart Valve Prosthesis
HOMOGRAFT
Immunohistochemistry
Life Sciences & Biomedicine
Materials Engineering
Materials Science
Materials Science, Biomaterials
PEDIATRIC-PATIENTS
PULMONARY VALVE
RECONSTRUCTION
Regeneration
ROSS OPERATION
Science & Technology
Sheep
Sodium Dodecyl Sulfate
STANDARD CRYOPRESERVED ALLOGRAFTS
Sus scrofa
Technology
Tissue Engineering
Ventricular Outflow Obstruction
VENTRICULAR OUTFLOW TRACT
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Summary:© 2015 Mary Ann Liebert, Inc. The aims of this study were to determine the functional biocompatibility of low-concentration SDS-decellularized porcine aortic roots in vivo. A previously developed process was modified for 9-And 15-mm-diameter aortic roots to facilitate implantation into the porcine abdominal aorta (n=3) and juvenile sheep right ventricular outflow tract (n=7), respectively. Native allogeneic aortic roots were used as controls. Acellular porcine roots explanted from pigs at weeks were largely repopulated with stromal cells of appropriate phenotype, and there was evidence that macrophages were involved in the regenerative process. Native allogeneic roots were subject to a classic allograft rejection response. Acellular porcine roots explanted from sheep at 6 months showed evidence of appropriate cellular repopulation, again with evidence of a role for macrophages in the regenerative process. There was some degree of calcification of two of the explanted acellular roots, likely due to incomplete removal of DNA before implantation. Native allogeneic ovine roots were subject to a classic allograft rejection response involving T cells, which resulted in overtly calcified and damaged tissues. The study highlighted (1) the importance of removal of DNA from acellular porcine valved roots to avoid calcification and (2) a role for macrophages in the regeneration of low-concentration SDS-decellularized aortic roots, as has been reported for other acellular biological extracellular matrix scaffolds.