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Hyaluronic acid grafting mitigates calcification of glutaraldehyde‐fixed bovine pericardium

Hyaluronic acid grafting mitigates calcification of glutaraldehyde‐fixed bovine pericardium Pathologic calcification is the leading cause of the clinical failure of glutaraldehyde‐fixed bovine pericardium used in bioprosthetic valves. A novel surface modification of glutaraldehyde fixed bovine pericardium was carried out with high molecular weight hyaluronic acid (HA). HA was chemically modified with adipic dihydrazide (ADH) to introduce hydrazide functional groups onto the HA backbone. Glutaraldehyde‐fixed bovine pericardium (GFBP) was modified by grafting this HA to the free aldehyde groups on the tissue via the hydrazide groups. Following a 2‐week subcutaneous implantation in osteopontin (OPN)‐null mice, the calcification of HA‐modified bovine pericardium was drastically reduced (by 84.5%) compared to positive controls (tissue without HA‐modification) (p = 0.005). The calcification‐mitigating effect of HA surface modification was also confirmed by microscopic analysis of explanted tissue stained with Alizarin Red S for calcium. © 2004 Wiley Periodicals, Inc. J Biomed Mater Res 70A: 328–334, 2004 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Biomedical Materials Research Part A Wiley

Hyaluronic acid grafting mitigates calcification of glutaraldehyde‐fixed bovine pericardium

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References (47)

Publisher
Wiley
Copyright
Copyright © 2004 Wiley Periodicals, Inc., A Wiley Company
ISSN
1549-3296
eISSN
1552-4965
DOI
10.1002/jbm.a.30088
pmid
15227678
Publisher site
See Article on Publisher Site

Abstract

Pathologic calcification is the leading cause of the clinical failure of glutaraldehyde‐fixed bovine pericardium used in bioprosthetic valves. A novel surface modification of glutaraldehyde fixed bovine pericardium was carried out with high molecular weight hyaluronic acid (HA). HA was chemically modified with adipic dihydrazide (ADH) to introduce hydrazide functional groups onto the HA backbone. Glutaraldehyde‐fixed bovine pericardium (GFBP) was modified by grafting this HA to the free aldehyde groups on the tissue via the hydrazide groups. Following a 2‐week subcutaneous implantation in osteopontin (OPN)‐null mice, the calcification of HA‐modified bovine pericardium was drastically reduced (by 84.5%) compared to positive controls (tissue without HA‐modification) (p = 0.005). The calcification‐mitigating effect of HA surface modification was also confirmed by microscopic analysis of explanted tissue stained with Alizarin Red S for calcium. © 2004 Wiley Periodicals, Inc. J Biomed Mater Res 70A: 328–334, 2004

Journal

Journal of Biomedical Materials Research Part AWiley

Published: Aug 1, 2004

Keywords: bioprosthetic heart valve; bovine pericardium; glycosaminoglycan (GAG); hyaluronic acid (HA); calcification

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