Fabrication of 3D Scaffolds Displaying Biochemical Gradients along Longitudinally Oriented Microchannels for Neural Tissue Engineering | |
Huang LL(黄亮亮)1,2; Gao JB(高楗勃)2; Wang HR(王赫然)3; Xia B(夏冰)2; Yang YJ(杨雨洁)2; Xu, Feng1; Zheng XF(郑雄飞)3; Huang JH(黄景辉)2; Luo ZJ(罗卓荆)2 | |
刊名 | ACS Applied Materials and Interfaces |
2020 | |
卷号 | 12期号:43页码:48380−48394 |
关键词 | 3D printing directional freezing biochemical guidance topographical guidance nerve regeneration |
ISSN号 | 1944-8244 |
产权排序 | 3 |
英文摘要 | Biochemical and physical guidance cues are both pivotal for axonal guidance and nerve regeneration. However, fabrication of a platform that can integrate biochemical gradients and topographical guidance cues remains challenging, especially in a three-dimensional (3D) scaffold that closely mimics in vivo axonal outgrowth conditions and ready to be used for in vivo nerve repair. In this study, a new method was introduced to construct 3D scaffolds displaying continuous biochemical gradients along longitudinally oriented microchannels by combining the modified 3D printing and directional freezing techniques. Fluorescence analysis and ELISA results demonstrated that a continuous biochemical gradient was formed, and scanning electron microscopy revealed a longitudinally oriented microstructure. Dorsal root ganglia explants seeded on the longitudinal sections of the newly developed scaffold (scaffold with nerve growth factor gradient along oriented microstructure, G-NGF + OS) showed that 81.3 ± 4.5% of neurites oriented within ±10°, 0.3 ± 0.1 of guidance ratio, and 1.5-fold of the average length of neurites on the high-nerve growth factor (NGF) concentration side compared to that on the low-NGF concentration side, which were significantly higher than those in the other groups. In addition, the G-NGF + OS scaffold was used to repair a 15 mm sciatic nerve defect in rats. Immunofluorescence staining, Fluoro-Gold retrograde tracing, and transmission electron microscopy results confirmed that the G-NGF + OS scaffold enhanced nerve regeneration to the distal target and promoted myelination of regenerated axons. More importantly, the sciatic functional index and the von Frey test demonstrated that the G-NGF + OS scaffold accelerated sensory and motor functional recovery. These results provide new insights into the importance of combining topographical guidance cues with bioactive molecule gradient cues for neural tissue engineering. The 3D scaffold displaying biochemical gradients along longitudinally oriented microchannels represents a promising platform for the development of advanced devices for severe nervous system injuries. |
资助项目 | National Natural Science Foundation of China[81672148] ; National Natural Science Foundation of China[81201389] ; National Natural Science Foundation of China[81902213] ; National Key Research and Development Plan of China[2016YFC1101700] ; Program for Changjiang Scholar and Innovative Research Team in University[IRT1053] ; Program for Changjiang Scholar and Innovative Research Team in University[IRT13051] |
WOS关键词 | PERIPHERAL-NERVE REGENERATION ; GROWTH-FACTOR GRADIENTS ; CONTROLLED-RELEASE ; NEUROTROPHIC FACTORS ; ALIGNED NANOFIBERS ; NEURITE OUTGROWTH ; SILK-BIOMATERIALS ; GUIDANCE CONDUITS ; NGF ; HYDROGELS |
WOS研究方向 | Science & Technology - Other Topics ; Materials Science |
语种 | 英语 |
WOS记录号 | WOS:000586868400015 |
资助机构 | National Natural Science Foundation of China (grant numbers 81672148, 81201389, and 81902213) ; National Key Research and Development Plan of China (grant number 2016YFC1101700) ; Program for Changjiang Scholar and Innovative Research Team in University (grant numbers IRT1053 and IRT13051) |
内容类型 | 期刊论文 |
源URL | [http://ir.sia.cn/handle/173321/27901] |
专题 | 沈阳自动化研究所_机器人学研究室 |
通讯作者 | Zheng XF(郑雄飞); Huang JH(黄景辉); Luo ZJ(罗卓荆) |
作者单位 | 1.Department of Orthopaedics, General Hospital of Central Theater Command of Chinese People's Liberation Army, Wuhan, Hubei 430070, China 2.Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China 3.State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang, Liaoning 110000, China |
推荐引用方式 GB/T 7714 | Huang LL,Gao JB,Wang HR,et al. Fabrication of 3D Scaffolds Displaying Biochemical Gradients along Longitudinally Oriented Microchannels for Neural Tissue Engineering[J]. ACS Applied Materials and Interfaces,2020,12(43):48380−48394. |
APA | Huang LL.,Gao JB.,Wang HR.,Xia B.,Yang YJ.,...&Luo ZJ.(2020).Fabrication of 3D Scaffolds Displaying Biochemical Gradients along Longitudinally Oriented Microchannels for Neural Tissue Engineering.ACS Applied Materials and Interfaces,12(43),48380−48394. |
MLA | Huang LL,et al."Fabrication of 3D Scaffolds Displaying Biochemical Gradients along Longitudinally Oriented Microchannels for Neural Tissue Engineering".ACS Applied Materials and Interfaces 12.43(2020):48380−48394. |
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