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Calcification assessment of bioprosthetic heart valve tissues using an improved in vitro model

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journal contribution
posted on 28.01.2021, 11:13 by Cristian C D'Alessandro, Maria A Komninou, Adel F Badria, Sotiris KorossisSotiris Korossis, Petros Koutsoukos, Dimosthenis Mavrilas
Calcification is a recurrent problem in patients suffering from heart valve disease and it is the main cause of failure in biological heart valve prostheses. The development of reliable calcification tests that consider both the material properties of the prostheses and the fluid composition is of paramount importance for the effective testing and subsequent selection of new cardiovascular implants. In this article, a fast, reliable, and highly reproducible method for the assessment of the calcification potential of biomaterials was developed. The developed method simulated closely the chemical environment in vivo, where the supersaturation levels of calcium and phosphate remain constant. Seeded hydroxyapatite (HAP) crystal growth experiments were used as the reference system and compared to the mineralization kinetics and extent of frozen untreated bovine and porcine pericardium, and glutaraldehyde-fixed bovine pericardium. Untreated pericardial patches did not calcify in the supersaturated calcium phosphate solutions whereas glutaraldehyde-fixed bovine pericardial patches mineralized at the same conditions. The present work suggested that the loose collagenous serosa side of the pericardium mineralized at lower rates compared to its dense collagenous fibrous side. Concordant with these findings, the mineralization of bioprostheses may also be attributed, to the structural deterioration of collagen-rich tissues, induced by chemical treatment used to control in vivo structural stability and immunomodulation of the implants.

Funding

People Program (Marie Curie Actions) of the European Union’s Seventh Framework FP7/2007-2013/ under REA grant agreement n°317512.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

IEEE Transactions on Biomedical Engineering

Volume

67

Issue

9

Pages

2453 - 2461

Publisher

IEEE

Version

AM (Accepted Manuscript)

Rights holder

© IEEE

Publisher statement

© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Acceptance date

17/12/2019

Publication date

2020-01-01

Copyright date

2020

ISSN

0018-9294

eISSN

1558-2531

Language

en

Depositor

Prof Sotiris Korossis. Deposit date: 21 January 2021