首页|A PEGylation method of fabricating bioprosthetic heart valves based on glutaraldehyde and 2-amino-4-pentenoic acid co-crosslinking with improved antithrombogenicity and cytocompatibility

A PEGylation method of fabricating bioprosthetic heart valves based on glutaraldehyde and 2-amino-4-pentenoic acid co-crosslinking with improved antithrombogenicity and cytocompatibility

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  • NSTL
  • Elsevier
With the development of diagnostic techniques, the incidence of bioprosthetic heart valve thrombo-sis (BHVT) is found to be seriously underestimated. Developing bioprosthetic heart valves (BHVs) that have good hemocompatibility without sacrificing other properties such as hydrodynamics and durabil-ity will be an effective strategy to alleviate BHVT. In this study, we developed a PEGylation method by co-crosslinking and subsequent radical polymerization. 2-amino-4-pentenoic acid was used to introduce carbon-carbon double bonds for glutaraldehyde crosslinked pericardia. Then poly (ethylene glycol) di-acrylate (PEGDA) was immobilized on pericardia by radical polymerization. A comprehensive evaluation of the modified pericardia was performed including structural characterization, hemocompatibility, cyto-compatibility, mechanical properties, component stability, hydrodynamic performance and durability of the BHVs. The modified pericardia significantly reduced platelet adhesion by more than 75% compared with traditional glutaraldehyde crosslinked pericardia. Cell viability in the modified pericardia group was nearly 5-fold higher than that in glutaraldehyde crosslinked pericardia. The hydrodynamic performance met the requirements of ISO 5840-3 under physiological aortic valve conditions and its durability was proved after 200 million cycles of accelerated fatigue test. In conclusion, PEGDA modified pericardia ex-hibited improved antithrombogenicity and cytocompatibility properties compared with glutaraldehyde crosslinked pericardia.

Co-crosslinkingBioprosthetic heart valvePoly (ethylene glycol) diacrylateHemocompatibilityCytocompatibilityPROTEIN SURFACE INTERACTIONSPOLYETHYLENE OXIDELEUKOCYTE ADHESIONBOVINE PERICARDIUMTISSUECALCIFICATIONCYTOTOXICITYENDOTHELIALIZATIONIDENTIFICATIONDEGRADATION

Zheng, Cheng、Huang, Xueyu、Zhang, Shumang、Li, Meiling、Lei, Yang、Wang, Yunbing、Ding, Kailei

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Natl Engn Res Ctr Biomat,Sichuan Univ

2022

10.1016/j.actbio.2022.03.026

Acta biomaterialia

Acta biomaterialia

EISCI
ISSN：1742-7061
年,卷(期)：2022.144
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