A novel bioactive polyurethane with controlled degradation and L-Arg release used as strong adhesive tissue patch for hemostasis and promoting wound healing  

作　　者：Faxing Zou Yansen Wang Yudong Zheng Yajie Xie Hua Zhang Jishan Chen M.Irfan Hussain Haoye Meng Jiang Peng 

机构地区：[1]School of Material Science&Engineering,University of Science and Technology Beijing,Beijing,10083,China [2]The First Affiliated Hospital of Chongqing Medical University,China [3]Beijing Key Lab of Regenerative Medicine in Orthopedics,Key Laboratory of Musculoskeletal Trauma&War Injuries,PLA Institute of Orthopedics,Chinese PLA General Hospital,Beijing,China

出　　处：《Bioactive Materials》2022年第11期471-487,共17页生物活性材料（英文）

基　　金：This work was financially supported by National Natural Science Foundation of China(Grant No.51973018,51773018);Fundamental Research Funds for the Central Universities(FRF-TP-17-001A2);Beijing Municipal Science and Technology Commission Projects(No.Z191100002019017).

摘　　要：Effective strategy of hemostasis and promoting angiogenesis are becoming increasingly urgent in modern medicine due to millions of deaths caused by tissue damage and inflammation. The tissue adhesive has been favored as an optimistic and efficient path to stop bleeding, while, current adhesive presents limitations on wound care or potential degradation safety in clinical practice. Therefore, it is of great clinical significance to construct multifunctional wound adhesive to address the issues. Based on pro-angiogenic property of L-Arginine (L-Arg), in this study, the novel tissue adhesive (G-DLPUs) constructed by L-Arg-based degradable polyurethane (DLPU) and GelMA were prepared for wound care. After systematic characterization, we found that the G-DLPUs were endowed with excellent capability in shape-adaptive adhesion. Moreover, the L-Arg released and the generation of NO during degradation were verified which would enhance wound healing. Following the in vivo biocompatibility was verified, the hemostatic effect of the damaged organ was tested using a rat liver hemor-rhage model, from which reveals that the G-DLPUs can reduce liver bleeding by nearly 75% and no obvious inflammatory cells observed around the tissue. Moreover, the wound care effect was confirmed in a mouse full-thickness skin defect model, showing that the hydrogel adhesive significantly improves the thickness of newly formed dermis and enhance vascularization (CD31 staining). In summary, the G-DLPUs are promising candidate to act as multifunctional wound care adhesive for both damaged organ and trauma.

关 键 词：Tissue adhesive Pro-angiogenic Biodegradable safety Arginine-based polyurethane HEMOSTASIS 

分 类 号：R318[医药卫生—生物医学工程]