4D-Printed MXene-Based Artificial Nerve Guidance Conduit for Enhanced Regeneration of Peripheral Nerve Injuries

• Published in: Advanced healthcare materials p. e2401093
• Main Authors: Wang, Zhilong, Zheng, Yan, Qiao, Liang, Ma, Yuanya, Zeng, Huajing, Liang, Jiachen, Ye, Qian, Shen, Kuangyu, Liu, Bin, Sun, Luyi, Fan, Zengjie
• Format: Journal Article
• Language: English
• Published: Germany 28.05.2024
• Subjects: 4D printing; peripheral nerve regeneration; shape memory; nerve guide conduit; MXene
• ISSN: 2192-2659
• DOI: 10.1002/adhm.202401093

Repairing larger defects (> 5 mm) in peripheral nerve injuries (PNIs) remains a significant challenge when using traditional artificial nerve guidance conduits (NGCs). We propose a novel approach that combines 4D printing technology with poly(L-lactide-co-trimethylene carbonate) (PLATMC) and Ti C T MXene nanosheets, thereby imparting shape memory properties to the NGCs. Upon body temperature activation, the printed sheet-like structure can quickly self-roll into a conduit-like structure, enabling optimal wrapping around nerve stumps. This design enhances nerve fixation and simplifies surgical procedures. Moreover, the integration of microchannel expertly crafted through 4D printing, along with the incorporation of MXene nanosheets, introduces electrical conductivity. This feature facilitates the guided and directional migration of nerve cells, rapidly accelerating the healing of the PNI. By leveraging these advanced technologies, the developed NGCs demonstrate remarkable potential in promoting peripheral nerve regeneration, leading to substantial improvements in muscle morphology and restored sciatic nerve function, comparable to outcomes achieved through autogenous nerve transplantation. This article is protected by copyright. All rights reserved.