Anticoagulant Hydrogel Tubes with Poly(ɛ‐Caprolactone) Sheaths for Small‐Diameter Vascular Grafts. Issue 19 (3rd July 2021)

• Record Type: Journal Article
• Authors: Zhang, Chunliang; Xie, Qian; Cha, Ruitao; Ding, Li; Jia, Liujun; Mou, Lei; Cheng, Shiyu; Wang, Nuoxin; Li, Zulan; Sun, Yang; Cui, Chuanjue; Zhang, Yu; Zhang, Yan; Zhou, Fengshan; Jiang, Xingyu
• Is Part Of: Advanced healthcare materials. Volume 10:Issue 19(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-07-03
• Subjects: anticoagulation -- hybrid hydrogel tubes -- nanofibrillated cellulose -- poly(ε‐caprolactone) -- small‐diameter vascular grafts; Biomedical materials -- Periodicals; 610.28
• DOI: 10.1002/adhm.202100839
• Languages: English
• ISSNs: 2192-2640

Abstract

Abstract: Small‐diameter vascular grafts (inner diameter < 6 mm) are useful in treating cardiovascular diseases. The off‐the‐shelf small‐diameter vascular grafts for clinical applications remain a great limitation owing to their thrombogenicity or intimal hyperplasia. Herein, bilayer anticoagulant hydrogel tubes with poly( ε ‐caprolactone) (PCL) sheaths are prepared by freeze‐thawing and electrospinning, which contain nanofibrillated cellulose (NFC)/poly(vinyl alcohol) (PVA)‐heparin/poly‐ L ‐lysine nanoparticles tube as an inner layer and PCL sheath as an outer layer. The structure, anticoagulant property, and biocompatibility of the inner layer are studied. The effects of thickness of the outer layer on perfusion performance and mechanical property of hydrogel tubes with PCL sheaths (PCL‐NFC/PVA‐NPs tubes) are investigated. The effect of compliance of PCL‐NFC/PVA‐NPs tubes on their blood flow is studied by numerical simulation. The tissue compatibility and the patency of PCL‐NFC/PVA‐NPs tubes are evaluated by implantation in subcutaneous tissue of rats and carotid artery of rabbits. PCL‐NFC/PVA‐NPs tubes have prominent anticoagulation, sufficient burst pressure and good compliance similar to native arteries. PCL‐NFC/PVA‐NPs tubes facilitate infiltration of host cells and achieve active proliferation of recruited cells, which will be a promising candidate for small‐diameter vascular grafts. Abstract : Bilayer anticoagulant hydrogel tubes with poly( ε ‐caprolactone) sheaths mimic the structures (layered structure and anticoagulant inner surface) and mechanical properties (excellent ductility, sufficient burst pressure, and good compliance) of the artery, which have excellent biocompatibility, good tissue compatibility, and good patency. Hydrogel tubes are great promising candidates for small‐diameter vascular grafts.