期刊
COMPOSITES PART B-ENGINEERING
卷 234, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2022.109667
关键词
Blood-contacting implantable device; Heart valve; Recombinant humanized collagen; Functional crosslinking method; Anticoagulation; Mechanical property
资金
- National Key Research and Development Programs, China [2020YFC1107802]
- National Natural Science Foundation of China [32101107, 32071357]
- 111 Project of Introducing Talents of Discipline to Universities, China [B16033]
- Fundamental Research Funds for the Central Universities, China [YJ201641]
This study successfully designed a novel artificial heart valve with significantly improved anticoagulation and mechanical properties by introducing rhCOLIII, while reducing platelet adhesion and inflammatory responses.
A large number of blood contacting implantable devices are used worldwide annually. Acellular matrix (AM), as one of the blood-contacting materials, has achieved a great success, since it remains the structures, components and certain functions of extracellular matrix. However, AM often fails during the period of service owing to non ideal anticoagulation, severe inflammatory responses and poor mechanical properties. Herein, we specially prepared a newly designed tailored recombinant humanized collagen type III (rhCOLIII) that effectively removed the binding site to platelets while retaining cytocompatibility. In this study, a radical-polymerization-crosslinked decellularized porcine pericardium (DPP) with rhCOLIII and glycidyl methacrylate (GMA) through one-pot method was designed as artificial heart valves. Due to the introduction of rhCOLIII, the anticoagulation properties were dramatically improved with fewer platelets adhesion and less thrombogenesis. The mechanical properties of the novel heart valve (rhCOLIII/GMA-DPP) were significantly enhanced through radical polymerization crosslinking. Furthermore, experiments in vivo and vitro showed the inflammatory responses were moderately reduced. In conclusion, this study provides a simple strategy for functional crosslinking AM in blood contacting implantable devices and shows possibilities for real application.
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