Microchannelled alkylated chitosan sponge to treat noncompressible hemorrhages and facilitate wound healing

Xinchen Du, Le Wu, Hongyu Yan, Zhuyan Jiang, Shilin Li, Wen Li, Yanli Bai, Hongjun Wang, Zhaojun Cheng, Deling Kong (), Lianyong Wang () and Meifeng Zhu ()
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Xinchen Du: Nankai University
Le Wu: Nankai University
Hongyu Yan: Nankai University
Zhuyan Jiang: The Second Hospital of Tianjin Medical University
Shilin Li: Nankai University
Wen Li: Nankai University
Yanli Bai: Nankai University
Hongjun Wang: Stevens Institute of Technology
Zhaojun Cheng: Shenzhen Traditional Chinese Medicine Hospital
Deling Kong: Nankai University
Lianyong Wang: Nankai University
Meifeng Zhu: Nankai University

Nature Communications, 2021, vol. 12, issue 1, 1-16

Abstract: Abstract Developing an anti-infective shape-memory hemostatic sponge able to guide in situ tissue regeneration for noncompressible hemorrhages in civilian and battlefield settings remains a challenge. Here we engineer hemostatic chitosan sponges with highly interconnective microchannels by combining 3D printed microfiber leaching, freeze-drying, and superficial active modification. We demonstrate that the microchannelled alkylated chitosan sponge (MACS) exhibits the capacity for water and blood absorption, as well as rapid shape recovery. We show that compared to clinically used gauze, gelatin sponge, CELOX™, and CELOX™-gauze, the MACS provides higher pro-coagulant and hemostatic capacities in lethally normal and heparinized rat and pig liver perforation wound models. We demonstrate its anti-infective activity against S. aureus and E. coli and its promotion of liver parenchymal cell infiltration, vascularization, and tissue integration in a rat liver defect model. Overall, the MACS demonstrates promising clinical translational potential in treating lethal noncompressible hemorrhage and facilitating wound healing.

Date: 2021
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DOI: 10.1038/s41467-021-24972-2

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