期刊
ADVANCED SCIENCE
卷 10, 期 12, 页码 -出版社
WILEY
DOI: 10.1002/advs.202205744
关键词
3D bioprinting; aligned microfiber; graphene oxide; nerve guidance conduits; nerve regeneration
In this study, a conductive multiscale filled NGC (MF-NGC) is developed, which significantly enhances peripheral nerve regeneration. The printed MF-NGCs possess good permeability, mechanical stability, and electrical conductivity, promoting the elongation and growth of Schwann cells and neurite outgrowth. Animal studies demonstrate that the MF-NGCs promote neovascularization and M2 transition, leading to improved peripheral nerve regeneration. This study demonstrates the feasibility of using 3D-printed conductive MF-NGCs with hierarchically oriented fibers as functional conduits.
Nerve guidance conduits (NGCs) have become a promising alternative for peripheral nerve regeneration; however, the outcome of nerve regeneration and functional recovery is greatly affected by the physical, chemical, and electrical properties of NGCs. In this study, a conductive multiscale filled NGC (MF-NGC) consisting of electrospun poly(lactide-co-caprolactone) (PCL)/collagen nanofibers as the sheath, reduced graphene oxide /PCL microfibers as the backbone, and PCL microfibers as the internal structure for peripheral nerve regeneration is developed. The printed MF-NGCs presented good permeability, mechanical stability, and electrical conductivity, which further promoted the elongation and growth of Schwann cells and neurite outgrowth of PC12 neuronal cells. Animal studies using a rat sciatic nerve injury model reveal that the MF-NGCs promote neovascularization and M2 transition through the rapid recruitment of vascular cells and macrophages. Histological and functional assessments of the regenerated nerves confirm that the conductive MF-NGCs significantly enhance peripheral nerve regeneration, as indicated by improved axon myelination, muscle weight increase, and sciatic nerve function index. This study demonstrates the feasibility of using 3D-printed conductive MF-NGCs with hierarchically oriented fibers as functional conduits that can significantly enhance peripheral nerve regeneration.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据