1
|
Zhang Y, Wu Z, Wu J, Li T, Jiang F, Yang B. Current multi-scale biomaterials for tissue regeneration following spinal cord injury. Neurochem Int 2024; 178:105801. [PMID: 38971503 DOI: 10.1016/j.neuint.2024.105801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Revised: 06/27/2024] [Accepted: 07/04/2024] [Indexed: 07/08/2024]
Abstract
Spinal cord injury (SCI) may cause loss of motor and sensory function, autonomic dysfunction, and thus disrupt the quality of life of patients, leading to severe disability and significant psychological, social, and economic burden. At present, existing therapy for SCI have limited ability to promote neural function recovery, and there is an urgent need to develop innovative regenerative approaches to repair SCI. Biomaterials have become a promising strategy to promote the regeneration and repair of damaged nerve tissue after SCI. Biomaterials can provide support for nerve tissue by filling cavities, and improve local inflammatory responses and reshape extracellular matrix structures through unique biochemical properties to create the optimal microenvironment at the SCI site, thereby promoting neurogenesis and reconnecting damaged spinal cord tissue. Considering the importance of biomaterials in repairing SCI, this article reviews the latest progress of multi-scale biomaterials in SCI treatment and tissue regeneration, and evaluates the relevant technologies for manufacturing biomaterials.
Collapse
Affiliation(s)
- Yuang Zhang
- Department of Orthopedics, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 310009, PR China
| | - Zhonghuan Wu
- Department of Orthopedics, People's Hospital of Qiandongnan Miao and Dong Autonomous Prefecture, Kaili, 556000, PR China; Department of Orthopedics, Qiandongnan Hospital of Guizhou Medical University Affiliated Hospital, Kaili, 556000, PR China
| | - Junfeng Wu
- Department of Orthopedics, People's Hospital of Qiandongnan Miao and Dong Autonomous Prefecture, Kaili, 556000, PR China; Department of Orthopedics, Qiandongnan Hospital of Guizhou Medical University Affiliated Hospital, Kaili, 556000, PR China
| | - Tingdong Li
- Department of Orthopedics, People's Hospital of Qiandongnan Miao and Dong Autonomous Prefecture, Kaili, 556000, PR China; Department of Orthopedics, Qiandongnan Hospital of Guizhou Medical University Affiliated Hospital, Kaili, 556000, PR China
| | - Fugui Jiang
- Department of Orthopedics, People's Hospital of Qiandongnan Miao and Dong Autonomous Prefecture, Kaili, 556000, PR China; Department of Orthopedics, Qiandongnan Hospital of Guizhou Medical University Affiliated Hospital, Kaili, 556000, PR China
| | - Biao Yang
- Department of Orthopedics, People's Hospital of Qiandongnan Miao and Dong Autonomous Prefecture, Kaili, 556000, PR China; Department of Orthopedics, Qiandongnan Hospital of Guizhou Medical University Affiliated Hospital, Kaili, 556000, PR China.
| |
Collapse
|
2
|
Zhang B, Wang W, Gao P, Li X, Chen L, Lin Z, Chen H, Liang W, Kong Z, Lin D, Wu X, Zhang T. Injectable, Electroconductive, Free Radical Scavenging Silk Fibroin/Black Phosphorus/Glycyrrhizic Acid Nanocomposite Hydrogel for Enhancing Spinal Cord Repair. Adv Healthc Mater 2024; 13:e2304300. [PMID: 38589053 DOI: 10.1002/adhm.202304300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Revised: 03/25/2024] [Indexed: 04/10/2024]
Abstract
Spinal cord injury (SCI) often leads to a severe permanent disability. A poor inflammatory microenvironment and nerve electric signal conduction block are the main reasons for difficulty in spinal cord nerve regeneration. In this study, black phosphorus (BP) and glycyrrhizic acid (GA) are integrated into methacrylate-modified silk fibroin (SF) to construct a bifunctional injectable hydrogel (SF/BP/GA) with appropriate conductivity and the ability to inhibit inflammation to promote neuronal regeneration after SCI. This work discovers that the SF/BP/GA hydrogel can reduce the oxidative damage mediated by oxygen free radicals, promote the polarization of macrophages toward the anti-inflammatory M2 phenotype, reduce the expression of inflammatory factors, and improve the inflammatory microenvironment. Moreover, it induces neural stem cell (NSC) differentiation and neurosphere formation, restores signal conduction at the SCI site in vivo, and ameliorates motor function in mice with spinal cord hemisection, revealing a significant neural repair effect. An injectable, electroconductive, free-radical-scavenging hydrogel is a promising therapeutic strategy for SCI repair.
Collapse
Affiliation(s)
- Beichen Zhang
- Department of Graduate School and Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
- Department of Orthopedic Surgery, Department of Neurosurgery, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China
| | - Wanshun Wang
- Department of Graduate School and Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
- Department of Orthopedic Surgery, Department of Neurosurgery, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China
- Department of Orthopedic Surgery, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, 510120, China
| | - Peng Gao
- Department of Graduate School and Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
- Department of Orthopedic Surgery, Department of Neurosurgery, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China
| | - Xiang Li
- Department of Graduate School and Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
| | - Lingling Chen
- Department of Orthopedic Surgery, Department of Neurosurgery, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China
- The First School of Clinical Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Zefeng Lin
- Department of Orthopedic Surgery, Department of Neurosurgery, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China
| | - Hu Chen
- Department of Orthopedic Surgery, Department of Neurosurgery, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China
- The First School of Clinical Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Wenhao Liang
- Department of Orthopedic Surgery, Department of Neurosurgery, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China
- The First School of Clinical Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Zhiyuan Kong
- Department of Orthopedic Surgery, Department of Neurosurgery, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China
| | - Dingkun Lin
- Department of Graduate School and Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
- Department of Orthopedic Surgery, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, 510120, China
| | - Xiaona Wu
- Department of Orthopedic Surgery, Department of Neurosurgery, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China
- The First School of Clinical Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Tao Zhang
- Department of Graduate School and Second Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
- Department of Orthopedic Surgery, Department of Neurosurgery, General Hospital of Southern Theatre Command of PLA, Guangzhou, 510010, China
- The First School of Clinical Medicine, Southern Medical University, Guangzhou, 510515, China
| |
Collapse
|
3
|
Sun Y, Xiao Z, Chen B, Zhao Y, Dai J. Advances in Material-Assisted Electromagnetic Neural Stimulation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2400346. [PMID: 38594598 DOI: 10.1002/adma.202400346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 03/26/2024] [Indexed: 04/11/2024]
Abstract
Bioelectricity plays a crucial role in organisms, being closely connected to neural activity and physiological processes. Disruptions in the nervous system can lead to chaotic ionic currents at the injured site, causing disturbances in the local cellular microenvironment, impairing biological pathways, and resulting in a loss of neural functions. Electromagnetic stimulation has the ability to generate internal currents, which can be utilized to counter tissue damage and aid in the restoration of movement in paralyzed limbs. By incorporating implanted materials, electromagnetic stimulation can be targeted more accurately, thereby significantly improving the effectiveness and safety of such interventions. Currently, there have been significant advancements in the development of numerous promising electromagnetic stimulation strategies with diverse materials. This review provides a comprehensive summary of the fundamental theories, neural stimulation modulating materials, material application strategies, and pre-clinical therapeutic effects associated with electromagnetic stimulation for neural repair. It offers a thorough analysis of current techniques that employ materials to enhance electromagnetic stimulation, as well as potential therapeutic strategies for future applications.
Collapse
Affiliation(s)
- Yuting Sun
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhifeng Xiao
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Bing Chen
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Yannan Zhao
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Jianwu Dai
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, China
| |
Collapse
|
4
|
Bai L, Gao J, Zhang P, Lin S, Zhang C. Immunotherapy of M2 macrophage derived from exosome-based nanoparticles for spinal cord injury. Int Immunopharmacol 2024; 132:111983. [PMID: 38593504 DOI: 10.1016/j.intimp.2024.111983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Revised: 03/27/2024] [Accepted: 03/28/2024] [Indexed: 04/11/2024]
Abstract
Developing biomimetic nanoparticles without off-target side-effects remains a major challenge in spinal cord injury (SCI) immunotherapy. In this paper, we have conducted a drug carrier which is biocompatible macrophages-exocytosed exosome-biomimetic manganese (Mn)-iron prussian blue analogues (MPBs) for SCI immunotherapy. Exosome-sheathed MPBs (E-MPBs) exhibit promoted microglia accumulation, alleviation from H2O2-induced microenvironment and inhibition of apoptosis and inflammation in vitro. In addition, E-MPBs possessed significant tissue repair and neuroprotection in vivo. These properties endowed E-MPBs with great improvement in vivo in function recovery, resulting in anti-neuroinflammation activity and excellent biocompatibility in mice SCI model. As a promising treatment for efficient SCI immunotherapy, these results demonstrate the use of exosome-sheathed biomimetic nanoparticles exocytosed by anti-inflammation cells is feasible.
Collapse
Affiliation(s)
- Lu Bai
- Department of Gastroenterology, Third Affiliated Hospital of Jinzhou Medical University, Jinzhou, PR China
| | - Jinpeng Gao
- Department of Orthopedics, Third Affiliated Hospital of Jinzhou Medical University, Jinzhou, PR China
| | - Peng Zhang
- Department of Orthopedics, Third Affiliated Hospital of Jinzhou Medical University, Jinzhou, PR China
| | - Sen Lin
- Department of Orthopedics, Third Affiliated Hospital of Jinzhou Medical University, Jinzhou, PR China.
| | - Chuanjie Zhang
- Department of Orthopedics, Third Affiliated Hospital of Jinzhou Medical University, Jinzhou, PR China.
| |
Collapse
|
5
|
Deng B, Jiang S, Liu G, Li X, Zhao Y, Fan X, Ren J, Ning C, Xu L, Ji L, Mu X. Tetramethylpyrazine-loaded electroconductive hydrogels promote tissue repair after spinal cord injury by protecting the blood-spinal cord barrier and neurons. J Mater Chem B 2024; 12:4409-4426. [PMID: 38630533 DOI: 10.1039/d3tb02160b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2024]
Abstract
Spinal cord injury (SCI) usually induces profound microvascular dysfunction. It disrupts the integrity of the blood-spinal cord barrier (BSCB), which could trigger a cascade of secondary pathological events that manifest as neuronal apoptosis and axonal demyelination. These events can further lead to irreversible neurological impairments. Thus, reducing the permeability of the BSCB and maintaining its substructural integrity are essential to promote neuronal survival following SCI. Tetramethylpyrazine (TMP) has emerged as a potential protective agent for treating the BSCB after SCI. However, its therapeutic potential is hindered by challenges in the administration route and suboptimal bioavailability, leading to attenuated clinical outcomes. To address this challenge, traditional Chinese medicine, TMP, was used in this study to construct a drug-loaded electroconductive hydrogel for synergistic treatment of SCI. A conductive hydrogel combined with TMP demonstrates good electrical and mechanical properties as well as superior biocompatibility. Furthermore, it also facilitates sustained local release of TMP at the implantation site. Furthermore, the TMP-loaded electroconductive hydrogel could suppress oxidative stress responses, thereby diminishing endothelial cell apoptosis and the breakdown of tight junction proteins. This concerted action repairs BSCB integrity. Concurrently, myelin-associated axons and neurons are protected against death, which meaningfully restore neurological functions post spinal cord injury. Hence, these findings indicate that combining the electroconductive hydrogel with TMP presents a promising avenue for potentiating drug efficacy and synergistic repair following SCI.
Collapse
Affiliation(s)
- Bowen Deng
- Division of Intelligent and Biomechanical System, State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China.
- Department of Orthopedics, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, 100700, China.
| | - Shengyuan Jiang
- Department of Orthopedics, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, 100700, China.
| | - Gang Liu
- Department of Orthopedics, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, 100700, China.
| | - Xiaoye Li
- Department of Orthopedics, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, 100700, China.
| | - Yi Zhao
- Department of Orthopedics, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, 100700, China.
| | - Xiao Fan
- Department of Orthopedics, Qingdao Municipal Hospital, Qingdao, 266071, Shandong Province, China
| | - Jingpei Ren
- Department of Orthopedics, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, 100700, China.
| | - Chengyun Ning
- College of Materials Science and Technology, South China University of Technology, Guangzhou 510641, Guangdong Province, China
| | - Lin Xu
- Department of Orthopedics, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, 100700, China.
| | - Linhong Ji
- Division of Intelligent and Biomechanical System, State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, China.
| | - Xiaohong Mu
- Department of Orthopedics, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, 100700, China.
| |
Collapse
|
6
|
Zhang Y, Yao A, Wu J, Li S, Wang M, Peng Z, Sung HW, Jiang B, Li RK. Conductive Hydrogel Restores Electrical Conduction to Promote Neurological Recovery in a Rat Model. Tissue Eng Part A 2024. [PMID: 38661545 DOI: 10.1089/ten.tea.2023.0372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024] Open
Abstract
Spinal cord injury (SCI), caused by significant physical trauma, as well as other pathological conditions, results in electrical signaling disruption and loss of bodily functional control below the injury site. Conductive biomaterials have been considered a promising approach for treating SCI, owing to their ability to restore electrical connections between intact spinal cord portions across the injury site. In this study, we evaluated the ability of a conductive hydrogel, poly-3-amino-4-methoxybenzoic acid-gelatin (PAMB-G), to restore electrical signaling and improve neuronal regeneration in a rat SCI model generated using the compression clip method. Gelatin or PAMB-G was injected at the SCI site, yielding three groups: Control (saline), Gelatin, and PAMB-G. During the 8-week study, PAMB-G, compared to Control, had significantly lower proinflammatory factor expression, such as for tumor necrosis factor -α (0.388 ± 0.276 for PAMB-G vs. 1.027 ± 0.431 for Control) and monocyte chemoattractant protein (MCP)-1 (0.443 ± 0.201 for PAMB-G vs. 1.662 ± 0.912 for Control). In addition, PAMB-G had lower astrocyte and microglia numbers (35.75 ± 4.349 and 40.75 ± 7.890, respectively) compared to Control (50.75 ± 6.5 and 64.75 ± 10.72) and Gelatin (48.75 ± 4.787 and 71.75 ± 7.411). PAMB-G-treated rats also had significantly greater preservation and regeneration of remaining intact neuronal tissue (0.523 ± 0.059% mean white matter in PAMB-G vs 0.377 ± 0.044% in Control and 0.385 ± 0.051% in Gelatin) caused by reduced apoptosis and increased neuronal growth-associated gene expression. All these processes stemmed from PAMB-G facilitating increased electrical signaling conduction, leading to locomotive functional improvements, in the form of increased Basso-Beattie-Bresnahan scores and steeper angles in the slope test (76.667 ± 5.164 for PAMB-G, vs. 59.167 ± 4.916 for Control and 58.333 ± 4.082 for Gelatin), as well as reduced gastrocnemius muscle atrophy (0.345 ± 0.085 for PAMB-G, vs. 0.244 ± 0.021 for Control and 0.210 ± 0.058 for Gelatin). In conclusion, PAMB-G injection post-SCI resulted in improved electrical signaling conduction, which contributed to lowered inflammation and apoptosis, increased neuronal growth, and greater bodily functional control, suggesting its potential as a viable treatment for SCI.
Collapse
Affiliation(s)
- Yichong Zhang
- Department of Orthopedics and Trauma, Key Laboratory of Trauma and Neural Regeneration (Ministry of Education/Peking University), Peking University People's Hospital, Beijing, China
- Toronto General Hospital Research Institute, University Health Network, Toronto, Canada
| | - Alina Yao
- Toronto General Hospital Research Institute, University Health Network, Toronto, Canada
| | - Jun Wu
- Toronto General Hospital Research Institute, University Health Network, Toronto, Canada
| | - Shuhong Li
- Toronto General Hospital Research Institute, University Health Network, Toronto, Canada
| | - Minyao Wang
- Toronto General Hospital Research Institute, University Health Network, Toronto, Canada
| | - Zexu Peng
- Toronto General Hospital Research Institute, University Health Network, Toronto, Canada
| | - Hsing-Wen Sung
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan
| | - Baoguo Jiang
- Department of Orthopedics and Trauma, Key Laboratory of Trauma and Neural Regeneration (Ministry of Education/Peking University), Peking University People's Hospital, Beijing, China
| | - Ren-Ke Li
- Toronto General Hospital Research Institute, University Health Network, Toronto, Canada
- Division of Cardiovascular Surgery, Department of Surgery, University of Toronto, Toronto, Canada
| |
Collapse
|
7
|
Yao S, Yang Y, Li C, Yang K, Song X, Li C, Cao Z, Zhao H, Yu X, Wang X, Wang LN. Axon-like aligned conductive CNT/GelMA hydrogel fibers combined with electrical stimulation for spinal cord injury recovery. Bioact Mater 2024; 35:534-548. [PMID: 38414842 PMCID: PMC10897856 DOI: 10.1016/j.bioactmat.2024.01.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 12/18/2023] [Accepted: 01/19/2024] [Indexed: 02/29/2024] Open
Abstract
Rehabilitation and regenerative medicine are two promising approaches for spinal cord injury (SCI) recovery, but their combination has been limited. Conductive biomaterials could bridge regenerative scaffolds with electrical stimulation by inducing axon regeneration and supporting physiological electrical signal transmission. Here, we developed aligned conductive hydrogel fibers by incorporating carbon nanotubes (CNTs) into methacrylate acylated gelatin (GelMA) hydrogel via rotating liquid bath electrospinning. The electrospun CNT/GelMA hydrogel fibers mimicked the micro-scale aligned structure, conductivity, and soft mechanical properties of neural axons. For in vitro studies, CNT/GelMA hydrogel fibers supported PC12 cell proliferation and aligned adhesion, which was enhanced by electrical stimulation (ES). Similarly, the combination of aligned CNT/GelMA hydrogel fibers and ES promoted neuronal differentiation and axon-like neurite sprouting in neural stem cells (NSCs). Furthermore, CNT/GelMA hydrogel fibers were transplanted into a T9 transection rat spinal cord injury model for in vivo studies. The results showed that the incorporating CNTs could remain at the injury site with the GelMA fibers biodegraded and improve the conductivity of regenerative tissue. The aligned structure of the hydrogel could induce the neural fibers regeneration, and the ES enhanced the remyelination and axonal regeneration. Behavioral assessments and electrophysiological results suggest that the combination of aligned CNT/GelMA hydrogel fibers and ES could significantly restore motor function in rats. This study demonstrates that conductive aligned CNT/GelMA hydrogel fibers can not only induce neural regeneration as a scaffold but also support ESto promote spinal cord injury recovery. The conductive hydrogel fibers enable merging regenerative medicine and rehabilitation, showing great potential for satisfactory locomotor recovery after SCI.
Collapse
Affiliation(s)
- Shenglian Yao
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yongdong Yang
- Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
- Department of Orthopedics, Dongzhimen Hospital, Beijing University of Chinese Medicine, 5 Hai Yun Cang, Beijing, 100700, China
| | - Chenyu Li
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Kaitan Yang
- Department of Orthopedics, Dongzhimen Hospital, Beijing University of Chinese Medicine, 5 Hai Yun Cang, Beijing, 100700, China
| | - Xin Song
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Chuanhong Li
- Department of Orthopedics, Dongzhimen Hospital, Beijing University of Chinese Medicine, 5 Hai Yun Cang, Beijing, 100700, China
| | - Zheng Cao
- Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - He Zhao
- Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
- Department of Orthopedics, Dongzhimen Hospital, Beijing University of Chinese Medicine, 5 Hai Yun Cang, Beijing, 100700, China
| | - Xing Yu
- Department of Orthopedics, Dongzhimen Hospital, Beijing University of Chinese Medicine, 5 Hai Yun Cang, Beijing, 100700, China
| | - Xiumei Wang
- Key Laboratory of Advanced Materials of Ministry of Education, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
| | - Lu-Ning Wang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| |
Collapse
|
8
|
Wu Z, Zhou Y, Hou X, Liu W, Yin W, Wang L, Cao Y, Jiang Z, Guo Y, Chen Q, Xie W, Wang Z, Shi N, Liu Y, Gao X, Luo L, Dai J, Ren C, Jiang X. Construction of functional neural network tissue combining CBD-NT3-modified linear-ordered collagen scaffold and TrkC-modified iPSC-derived neural stem cells for spinal cord injury repair. Bioact Mater 2024; 35:242-258. [PMID: 38333615 PMCID: PMC10850738 DOI: 10.1016/j.bioactmat.2024.01.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 12/17/2023] [Accepted: 01/13/2024] [Indexed: 02/10/2024] Open
Abstract
Induced pluripotent stem cells (iPSCs) can be personalized and differentiated into neural stem cells (NSCs), thereby effectively providing a source of transplanted cells for spinal cord injury (SCI). To further improve the repair efficiency of SCI, we designed a functional neural network tissue based on TrkC-modified iPSC-derived NSCs and a CBD-NT3-modified linear-ordered collagen scaffold (LOCS). We confirmed that transplantation of this tissue regenerated neurons and synapses, improved the microenvironment of the injured area, enhanced remodeling of the extracellular matrix, and promoted functional recovery of the hind limbs in a rat SCI model with complete transection. RNA sequencing and metabolomic analyses also confirmed the repair effect of this tissue from multiple perspectives and revealed its potential mechanism for treating SCI. Together, we constructed a functional neural network tissue using human iPSCs-derived NSCs as seed cells based on the interaction of receptors and ligands for the first time. This tissue can effectively improve the therapeutic effect of SCI, thus confirming the feasibility of human iPSCs-derived NSCs and LOCS for SCI repair and providing a valuable direction for SCI research.
Collapse
Affiliation(s)
- Zhaoping Wu
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
| | - Yi Zhou
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
| | - Xianglin Hou
- State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100080, China
| | - Weidong Liu
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
- School of Basic Medical Science, Central South University, Changsha, Hunan Province, 410078, China
- The NHC Key Laboratory of Carcinogenesis and the Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Central South University, Changsha, Hunan Province, 410078, China
| | - Wen Yin
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
| | - Lei Wang
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
- School of Basic Medical Science, Central South University, Changsha, Hunan Province, 410078, China
- The NHC Key Laboratory of Carcinogenesis and the Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Central South University, Changsha, Hunan Province, 410078, China
| | - Yudong Cao
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
| | - Zhipeng Jiang
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
| | - Youwei Guo
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
| | - Quan Chen
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
| | - Wen Xie
- School of Basic Medical Science, Central South University, Changsha, Hunan Province, 410078, China
- The NHC Key Laboratory of Carcinogenesis and the Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Central South University, Changsha, Hunan Province, 410078, China
| | - Ziqiang Wang
- College of Biology, Hunan University, Changsha, 410000, China
| | - Ning Shi
- School of Basic Medical Science, Central South University, Changsha, Hunan Province, 410078, China
- The NHC Key Laboratory of Carcinogenesis and the Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Central South University, Changsha, Hunan Province, 410078, China
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing, 100080, China
| | - Yujun Liu
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing, 100080, China
| | - Xiang Gao
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing, 100080, China
| | - Longlong Luo
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing, 100080, China
| | - Jianwu Dai
- State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100080, China
| | - Caiping Ren
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
- School of Basic Medical Science, Central South University, Changsha, Hunan Province, 410078, China
- The NHC Key Laboratory of Carcinogenesis and the Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Central South University, Changsha, Hunan Province, 410078, China
| | - Xingjun Jiang
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan Province, 410008, China
| |
Collapse
|
9
|
Liu Z, Lai J, Kong D, Zhao Y, Zhao J, Dai J, Zhang M. Advances in electroactive bioscaffolds for repairing spinal cord injury. Biomed Mater 2024; 19:032005. [PMID: 38636508 DOI: 10.1088/1748-605x/ad4079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Accepted: 04/18/2024] [Indexed: 04/20/2024]
Abstract
Spinal cord injury (SCI) is a devastating neurological disorder, leading to loss of motor or somatosensory function, which is the most challenging worldwide medical problem. Re-establishment of intact neural circuits is the basis of spinal cord regeneration. Considering the crucial role of electrical signals in the nervous system, electroactive bioscaffolds have been widely developed for SCI repair. They can produce conductive pathways and a pro-regenerative microenvironment at the lesion site similar to that of the natural spinal cord, leading to neuronal regeneration and axonal growth, and functionally reactivating the damaged neural circuits. In this review, we first demonstrate the pathophysiological characteristics induced by SCI. Then, the crucial role of electrical signals in SCI repair is introduced. Based on a comprehensive analysis of these characteristics, recent advances in the electroactive bioscaffolds for SCI repair are summarized, focusing on both the conductive bioscaffolds and piezoelectric bioscaffolds, used independently or in combination with external electronic stimulation. Finally, thoughts on challenges and opportunities that may shape the future of bioscaffolds in SCI repair are concluded.
Collapse
Affiliation(s)
- Zeqi Liu
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, People's Republic of China
| | - Jiahui Lai
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, People's Republic of China
| | - Dexin Kong
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, People's Republic of China
| | - Yannan Zhao
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
| | - Jiakang Zhao
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, People's Republic of China
| | - Jianwu Dai
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, People's Republic of China
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
| | - Mingming Zhang
- Tianjin Key Laboratory of Biomedical Materials, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300192, People's Republic of China
| |
Collapse
|
10
|
Gao J, Chen S, Lin S, Mei X. Prussian blue analogues improves the microenvironment after spinal cord injury by regulating Zn. Int Immunopharmacol 2024; 131:111868. [PMID: 38493692 DOI: 10.1016/j.intimp.2024.111868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 03/04/2024] [Accepted: 03/11/2024] [Indexed: 03/19/2024]
Abstract
Mitochondrial injury, neuronal apoptosis and phenotypic transformation of macrophages are the main mechanisms of spinal cord injury. Based on the Prussian blue nanomase's strong ability to clear free radicals, the treatment of spinal cord injury with nano-zirconium (Pb-Zr) was carried out. The disease treatment strategy based on nanomaterials has excellent therapeutic effect, and Prussian blue analogs have good therapeutic properties, so the application prospects of Prussian blue analogs is broad. From the point of view of Prussian blue content, improving the presence of zirconium in the microenvironment significantly increased the activity of Prussian blue. Prussian Blue zirconium significantly improved lipopolysaccharide (LPS) and interferon (IFN-γ) induced neuronal cell (pc12 cells) and macrophage dysfunction by improving oxidative stress, inflammation, and apoptosis in the microenvironment. It can promote the recovery of motor function after spinal cord injury. In vivo experiments, it shows that Prussian blue zirconium can improve inflammation, apoptosis and oxidative stress of spinal cord tissue, promote regenerative therapy after spinal cord injury, and improve motor function. Moreover, it has been reported that high-priced Zr4+ cations can regulate the deposition and nucleation behavior of Zn2+ in high-performance zinc metal anodes. Therefore, we propose the hypothesis that Pb-Zr modulates Zn2+ be used to promote recovery from spinal cord injury. The results show that nanomaterial is beneficial in the treatment of spinal cord injury. This study provides a good prospect for the application of spinal cord injury treatment. It also provides an important feasibility for subsequent clinical conversions.
Collapse
Affiliation(s)
- Jinpeng Gao
- Department of Orthopedic of the Third Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning Province 121000, China; Key Laboratory of Medical Tissue Engineering, Jinzhou Medical University, Jinzhou, Liaoning Province 121000, China
| | - ShuRui Chen
- Department of Orthopedic of the Third Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning Province 121000, China; Key Laboratory of Medical Tissue Engineering, Jinzhou Medical University, Jinzhou, Liaoning Province 121000, China; Guangdong Second Provincial General Hospital, Integrated Chinese and Western Medicine Postdoctoral Research, Station School of Medicine, Jinan Guangzhou, Guangdong Province 510515, China
| | - Sen Lin
- Department of Orthopedic of the Third Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning Province 121000, China; Key Laboratory of Medical Tissue Engineering, Jinzhou Medical University, Jinzhou, Liaoning Province 121000, China.
| | - Xifan Mei
- Department of Orthopedic of the Third Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning Province 121000, China; Key Laboratory of Medical Tissue Engineering, Jinzhou Medical University, Jinzhou, Liaoning Province 121000, China.
| |
Collapse
|
11
|
Wang W, Yong J, Marciano P, O’Hare Doig R, Mao G, Clark J. The Translation of Nanomedicines in the Contexts of Spinal Cord Injury and Repair. Cells 2024; 13:569. [PMID: 38607008 PMCID: PMC11011097 DOI: 10.3390/cells13070569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Revised: 03/16/2024] [Accepted: 03/20/2024] [Indexed: 04/13/2024] Open
Abstract
PURPOSE OF THIS REVIEW Manipulating or re-engineering the damaged human spinal cord to achieve neuro-recovery is one of the foremost challenges of modern science. Addressing the restricted permission of neural cells and topographically organised neural tissue for self-renewal and spontaneous regeneration, respectively, is not straightforward, as exemplified by rare instances of translational success. This review assembles an understanding of advances in nanomedicine for spinal cord injury (SCI) and related clinical indications of relevance to attempts to design, engineer, and target nanotechnologies to multiple molecular networks. RECENT FINDINGS Recent research provides a new understanding of the health benefits and regulatory landscape of nanomedicines based on a background of advances in mRNA-based nanocarrier vaccines and quantum dot-based optical imaging. In relation to spinal cord pathology, the extant literature details promising advances in nanoneuropharmacology and regenerative medicine that inform the present understanding of the nanoparticle (NP) biocompatibility-neurotoxicity relationship. In this review, the conceptual bases of nanotechnology and nanomaterial chemistry covering organic and inorganic particles of sizes generally less than 100 nm in diameter will be addressed. Regarding the centrally active nanotechnologies selected for this review, attention is paid to NP physico-chemistry, functionalisation, delivery, biocompatibility, biodistribution, toxicology, and key molecular targets and biological effects intrinsic to and beyond the spinal cord parenchyma. SUMMARY The advance of nanotechnologies for the treatment of refractory spinal cord pathologies requires an in-depth understanding of neurobiological and topographical principles and a consideration of additional complexities involving the research's translational and regulatory landscapes.
Collapse
Affiliation(s)
- Wenqian Wang
- School of Chemical Engineering, University of New South Wales (UNSW), Kensington, NSW 2052, Australia; (W.W.); (J.Y.); (G.M.)
| | - Joel Yong
- School of Chemical Engineering, University of New South Wales (UNSW), Kensington, NSW 2052, Australia; (W.W.); (J.Y.); (G.M.)
| | - Paul Marciano
- Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia; (P.M.); (R.O.D.)
- Neil Sachse Centre for Spinal Cord Research, Lifelong Health Theme, South Australian Health and Medical Research Institute, North Terrace, Adelaide, SA 5000, Australia
| | - Ryan O’Hare Doig
- Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia; (P.M.); (R.O.D.)
- Neil Sachse Centre for Spinal Cord Research, Lifelong Health Theme, South Australian Health and Medical Research Institute, North Terrace, Adelaide, SA 5000, Australia
| | - Guangzhao Mao
- School of Chemical Engineering, University of New South Wales (UNSW), Kensington, NSW 2052, Australia; (W.W.); (J.Y.); (G.M.)
| | - Jillian Clark
- Adelaide Medical School, University of Adelaide, Adelaide, SA 5005, Australia; (P.M.); (R.O.D.)
- Neil Sachse Centre for Spinal Cord Research, Lifelong Health Theme, South Australian Health and Medical Research Institute, North Terrace, Adelaide, SA 5000, Australia
| |
Collapse
|
12
|
Xie C, Xu J, Wang X, Jiang S, Zheng Y, Liu Z, Jia Z, Jia Z, Lu X. Smart Hydrogels for Tissue Regeneration. Macromol Biosci 2024; 24:e2300339. [PMID: 37848181 DOI: 10.1002/mabi.202300339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 10/06/2023] [Indexed: 10/19/2023]
Abstract
The rapid growth in the portion of the aging population has led to a consequent increase in demand for biomedical hydrogels, together with an assortment of challenges that need to be overcome in this field. Smart hydrogels can autonomously sense and respond to the physiological/pathological changes of the tissue microenvironment and continuously adapt the response according to the dynamic spatiotemporal shifts in conditions. This along with other favorable properties, make smart hydrogels excellent materials for employing toward improving the precision of treatment for age-related diseases. The key factor during the smart hydrogel design is on accurately identifying the characteristics of natural tissues and faithfully replicating the composition, structure, and biological functions of these tissues at the molecular level. Such hydrogels can accurately sense distinct physiological and external factors such as temperature and biologically active molecules, so they may in turn actively and promptly adjust their response, by regulating their own biological effects, thereby promoting damaged tissue repair. This review summarizes the design strategies employed in the creation of smart hydrogels, their response mechanisms, as well as their applications in field of tissue engineering; and concludes by briefly discussing the relevant challenges and future prospects.
Collapse
Affiliation(s)
- Chaoming Xie
- Institute of Biomedical Engineering, College of Medicine, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
| | - Jie Xu
- Institute of Biomedical Engineering, College of Medicine, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
| | - Xinyi Wang
- Institute of Biomedical Engineering, College of Medicine, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
| | - Shengxi Jiang
- Institute of Biomedical Engineering, College of Medicine, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
| | - Yujia Zheng
- Institute of Biomedical Engineering, College of Medicine, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
| | - Zexin Liu
- Institute of Biomedical Engineering, College of Medicine, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
| | - Zhuo Jia
- Institute of Biomedical Engineering, College of Medicine, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
| | - Zhanrong Jia
- The Tenth Affiliated Hospital of Southern Medical University, Dongguan, Guangdong, 523000, China
| | - Xiong Lu
- Institute of Biomedical Engineering, College of Medicine, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
- Key Lab of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan, 610031, China
| |
Collapse
|
13
|
Shang WY, Ren YF, Li B, Huang XM, Zhang ZL, Huang J. Efficacy of growth factor gene-modified stem cells for motor function after spinal cord injury in rodents: a systematic review and meta‑analysis. Neurosurg Rev 2024; 47:87. [PMID: 38369598 DOI: 10.1007/s10143-024-02314-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 01/15/2024] [Accepted: 02/03/2024] [Indexed: 02/20/2024]
Abstract
The efficacy of growth factor gene-modified stem cells in treating spinal cord injury (SCI) remains unclear. This study aims to evaluate the effectiveness of growth factor gene-modified stem cells in restoring motor function after SCI. Two reviewers searched four databases, including PubMed, Embase, Web of Science, and Scopus, to identify relevant records. Studies on rodents assessing the efficacy of transplanting growth factor gene-modified stem cells in restoring motor function after SCI were included. The results were reported using the standardized mean difference (SMD) with a 95% confidence interval (95% CI). Analyses showed that growth factor gene-modified stem cell transplantation improved motor function recovery in rodents with SCI compared to the untreated (SMD = 3.98, 95% CI 3.26-4.70, I2 = 86.8%, P < 0.0001) and stem cell (SMD = 2.53, 95% CI 1.93-3.13, I2 = 86.9%, P < 0.0001) groups. Using growth factor gene-modified neural stem/histone cells enhanced treatment efficacy. In addition, the effectiveness increased when viral vectors were employed for gene modification and high transplantation doses were administered during the subacute phase. Stem cells derived from the human umbilical cord exhibited an advantage in motor function recovery. However, the transplantation of growth factor gene-modified stem cells did not significantly improve motor function in male rodents (P = 0.136). Transplantation of growth factor gene-modified stem cells improved motor function in rodents after SCI, but claims of enhanced efficacy should be approached with caution. The safety of gene modification remains a significant concern, requiring additional efforts to enhance its clinical translatability.
Collapse
Affiliation(s)
- Wen-Ya Shang
- Henan University of Chinese Medicine, Zhengzhou, China
| | - Ya-Feng Ren
- The First Affiliated Hospital of Henan University of CM, Zhengzhou, China.
| | - Bing Li
- The First Affiliated Hospital of Henan University of CM, Zhengzhou, China
| | | | - Zhi-Lan Zhang
- Henan University of Chinese Medicine, Zhengzhou, China
| | - Jing Huang
- Henan University of Chinese Medicine, Zhengzhou, China
| |
Collapse
|
14
|
Qin C, Qi Z, Pan S, Xia P, Kong W, Sun B, Du H, Zhang R, Zhu L, Zhou D, Yang X. Advances in Conductive Hydrogel for Spinal Cord Injury Repair and Regeneration. Int J Nanomedicine 2023; 18:7305-7333. [PMID: 38084124 PMCID: PMC10710813 DOI: 10.2147/ijn.s436111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 11/08/2023] [Indexed: 12/18/2023] Open
Abstract
Spinal cord injury (SCI) treatment represents a major challenge in clinical practice. In recent years, the rapid development of neural tissue engineering technology has provided a new therapeutic approach for spinal cord injury repair. Implanting functionalized electroconductive hydrogels (ECH) in the injury area has been shown to promote axonal regeneration and facilitate the generation of neuronal circuits by reshaping the microenvironment of SCI. ECH not only facilitate intercellular electrical signaling but, when combined with electrical stimulation, enable the transmission of electrical signals to electroactive tissue and activate bioelectric signaling pathways, thereby promoting neural tissue repair. Therefore, the implantation of ECH into damaged tissues can effectively restore physiological functions related to electrical conduction. This article focuses on the dynamic pathophysiological changes in the SCI microenvironment and discusses the mechanisms of electrical stimulation/signal in the process of SCI repair. By examining electrical activity during nerve repair, we provide insights into the mechanisms behind electrical stimulation and signaling during SCI repair. We classify conductive biomaterials, and offer an overview of the current applications and research progress of conductive hydrogels in spinal cord repair and regeneration, aiming to provide a reference for future explorations and developments in spinal cord regeneration strategies.
Collapse
Affiliation(s)
- Cheng Qin
- Department of Orthopedic Surgery, the Second Hospital of Jilin University, Changchun, 130041, People’s Republic of China
| | - Zhiping Qi
- Department of Orthopedic Surgery, the Second Hospital of Jilin University, Changchun, 130041, People’s Republic of China
| | - Su Pan
- Department of Orthopedic Surgery, the Second Hospital of Jilin University, Changchun, 130041, People’s Republic of China
| | - Peng Xia
- Department of Orthopedic Surgery, the Second Hospital of Jilin University, Changchun, 130041, People’s Republic of China
| | - Weijian Kong
- Department of Orthopedic Surgery, the Second Hospital of Jilin University, Changchun, 130041, People’s Republic of China
| | - Bin Sun
- Department of Orthopedic Surgery, the Second Hospital of Jilin University, Changchun, 130041, People’s Republic of China
| | - Haorui Du
- Department of Orthopedic Surgery, the Second Hospital of Jilin University, Changchun, 130041, People’s Republic of China
| | - Renfeng Zhang
- Department of Orthopedic Surgery, the Second Hospital of Jilin University, Changchun, 130041, People’s Republic of China
| | - Longchuan Zhu
- Department of Orthopedic Surgery, the Second Hospital of Jilin University, Changchun, 130041, People’s Republic of China
| | - Dinghai Zhou
- Department of Orthopedic Surgery, the Second Hospital of Jilin University, Changchun, 130041, People’s Republic of China
| | - Xiaoyu Yang
- Department of Orthopedic Surgery, the Second Hospital of Jilin University, Changchun, 130041, People’s Republic of China
| |
Collapse
|
15
|
Zhang S, Li Q, Zhang S. Neural regeneration ability of Polypyrrole-Collagen-Quercetin composite in the spinal cord injury. Regen Ther 2023; 24:85-93. [PMID: 37334243 PMCID: PMC10275702 DOI: 10.1016/j.reth.2023.05.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 05/22/2023] [Accepted: 05/28/2023] [Indexed: 06/20/2023] Open
Abstract
Spinal cord injury (SCI) is a major clinical problem in young patients. The major hurdle in SCI regeneration is the replacement of lost nerve communication signals due to injury. Here we have prepared a biocompatible electrical conductive composite such as Collagen-Polypyrrole combined with Quercetin (Col-PPy-Qur) composite. The prepared composites are characterized for their chemical functionality and morphology by the FTIR and SEM & TEM analysis, respectively. The Col-PPy-Qur composite observed electrical conductivity at 0.0653 s/cm due to the conductive Polypyrrole polymer present in the composite. The Col-PPy-Qur composite exhibits a mechanical strength of 0.1281 mPa, similar to the native human spinal cord's mechanical strength. In order to explore the regeneration potential, the viability of the composite has been tested with human astrocyte cells (HACs). The Tuj1 and GFAF marker expression was quantized by RT-PCR analysis. Increased Tuj1 and decreased GFAF expression by the Col-PPy-Qur composite indicated the potential differentiation ability of the HACs into neuron cells. The results indicated that the Col-PPy-Qur composite could have good regeneration and differentiation ability, better biocompatibility, and suitable mechanical and conductivity properties. It can act as an excellent strategy for spinal cord regeneration in the nearer future.
Collapse
Affiliation(s)
- Song Zhang
- Department of Neurosurgery, Hangzhou Children's Hospital, Hangzhou Normal University, Hangzhou City, Zhejiang Province, China
| | - Qifeng Li
- Department of Neurosurgery, Hangzhou Children's Hospital, Hangzhou Normal University, Hangzhou City, Zhejiang Province, China
| | - Song Zhang
- Department of Neurosurgery, The Second Affiliated Hospital of Guizhou University of Traditional Chinese Medicine, Guiyang City, Guizhou Province, China
| |
Collapse
|
16
|
Ji R, Hao Z, Wang H, Li X, Duan L, Guan F, Ma S. Application of Injectable Hydrogels as Delivery Systems in Spinal Cord Injury. Gels 2023; 9:907. [PMID: 37998998 PMCID: PMC10670785 DOI: 10.3390/gels9110907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 11/11/2023] [Accepted: 11/13/2023] [Indexed: 11/25/2023] Open
Abstract
Spinal cord injury (SCI) is a severe neurological injury caused by traffic accidents, trauma, or falls, which leads to significant loss of sensory, motor, and autonomous functions and seriously affects the patient's life quality. Although considerable progress has been made in mitigating secondary injury and promoting the regeneration/repair of SCI, the therapeutic effects need to be improved due to drug availability. Given their good biocompatibility, biodegradability, and low immunogenicity, injectable hydrogels can be used as delivery systems to achieve controlled release of drugs and other substances (cells and proteins, etc.), offering new hope for SCI repair. In this article, we summarized the types of injectable hydrogels, analyzed their application as delivery systems in SCI, and further discussed the mechanisms of hydrogels in the treatment of SCI, such as anti-inflammatory, antioxidant, anti-apoptosis, and pro-neurogenesis. Moreover, we highlighted the potential benefits of hydrogels in the treatment of SCI in combination with therapies, including the recent advances and achievements of these promising tools. Our review may offer new strategies for the development of SCI treatments based on injectable hydrogels as delivery systems.
Collapse
Affiliation(s)
| | | | | | | | | | - Fangxia Guan
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; (R.J.); (Z.H.); (H.W.); (X.L.); (L.D.)
| | - Shanshan Ma
- School of Life Sciences, Zhengzhou University, Zhengzhou 450001, China; (R.J.); (Z.H.); (H.W.); (X.L.); (L.D.)
| |
Collapse
|
17
|
Tai W, Zhang CL. In vivo cell fate reprogramming for spinal cord repair. Curr Opin Genet Dev 2023; 82:102090. [PMID: 37506560 PMCID: PMC11025462 DOI: 10.1016/j.gde.2023.102090] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 06/07/2023] [Accepted: 06/30/2023] [Indexed: 07/30/2023]
Abstract
Spinal cord injury (SCI) can lead to the loss of motor, sensory, or autonomic function due to neuronal death. Unfortunately, the adult mammalian spinal cord has limited intrinsic regenerative capacity, making it difficult to rebuild the neural circuits necessary for functional recovery. However, recent evidence suggests that in vivo fate reprogramming of resident cells that are normally non-neurogenic can generate new neurons. This process also improves the pathological microenvironment, and the new neurons can integrate into the local neural network, resulting in better functional outcomes in SCI animal models. In this concise review, we focus on recent advances while also discussing the challenges, pitfalls, and opportunities in the field of in vivo cell fate reprogramming for spinal cord repair.
Collapse
Affiliation(s)
- Wenjiao Tai
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Chun-Li Zhang
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
| |
Collapse
|
18
|
Tian T, Zhang S, Yang M. Recent progress and challenges in the treatment of spinal cord injury. Protein Cell 2023; 14:635-652. [PMID: 36856750 PMCID: PMC10501188 DOI: 10.1093/procel/pwad003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 12/29/2022] [Indexed: 02/12/2023] Open
Abstract
Spinal cord injury (SCI) disrupts the structural and functional connectivity between the higher center and the spinal cord, resulting in severe motor, sensory, and autonomic dysfunction with a variety of complications. The pathophysiology of SCI is complicated and multifaceted, and thus individual treatments acting on a specific aspect or process are inadequate to elicit neuronal regeneration and functional recovery after SCI. Combinatory strategies targeting multiple aspects of SCI pathology have achieved greater beneficial effects than individual therapy alone. Although many problems and challenges remain, the encouraging outcomes that have been achieved in preclinical models offer a promising foothold for the development of novel clinical strategies to treat SCI. In this review, we characterize the mechanisms underlying axon regeneration of adult neurons and summarize recent advances in facilitating functional recovery following SCI at both the acute and chronic stages. In addition, we analyze the current status, remaining problems, and realistic challenges towards clinical translation. Finally, we consider the future of SCI treatment and provide insights into how to narrow the translational gap that currently exists between preclinical studies and clinical practice. Going forward, clinical trials should emphasize multidisciplinary conversation and cooperation to identify optimal combinatorial approaches to maximize therapeutic benefit in humans with SCI.
Collapse
Affiliation(s)
- Ting Tian
- Ministry of Education Key Laboratory of Protein Science, Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center for Biological Structure, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Sensen Zhang
- Ministry of Education Key Laboratory of Protein Science, Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center for Biological Structure, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Maojun Yang
- Ministry of Education Key Laboratory of Protein Science, Beijing Advanced Innovation Center for Structural Biology, Beijing Frontier Research Center for Biological Structure, School of Life Sciences, Tsinghua University, Beijing 100084, China
- Cryo-EM Facility Center, Southern University of Science and Technology, Shenzhen 518055, China
| |
Collapse
|
19
|
Zeng CW, Tsai HJ. The Promising Role of a Zebrafish Model Employed in Neural Regeneration Following a Spinal Cord Injury. Int J Mol Sci 2023; 24:13938. [PMID: 37762240 PMCID: PMC10530783 DOI: 10.3390/ijms241813938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 09/07/2023] [Accepted: 09/09/2023] [Indexed: 09/29/2023] Open
Abstract
Spinal cord injury (SCI) is a devastating event that results in a wide range of physical impairments and disabilities. Despite the advances in our understanding of the biological response to injured tissue, no effective treatments are available for SCIs at present. Some studies have addressed this issue by exploring the potential of cell transplantation therapy. However, because of the abnormal microenvironment in injured tissue, the survival rate of transplanted cells is often low, thus limiting the efficacy of such treatments. Many studies have attempted to overcome these obstacles using a variety of cell types and animal models. Recent studies have shown the utility of zebrafish as a model of neural regeneration following SCIs, including the proliferation and migration of various cell types and the involvement of various progenitor cells. In this review, we discuss some of the current challenges in SCI research, including the accurate identification of cell types involved in neural regeneration, the adverse microenvironment created by SCIs, attenuated immune responses that inhibit nerve regeneration, and glial scar formation that prevents axonal regeneration. More in-depth studies are needed to fully understand the neural regeneration mechanisms, proteins, and signaling pathways involved in the complex interactions between the SCI microenvironment and transplanted cells in non-mammals, particularly in the zebrafish model, which could, in turn, lead to new therapeutic approaches to treat SCIs in humans and other mammals.
Collapse
Affiliation(s)
- Chih-Wei Zeng
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA;
- Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Huai-Jen Tsai
- Department of Life Science, Fu Jen Catholic University, New Taipei City 242062, Taiwan
| |
Collapse
|
20
|
Zhiguo F, Ji W, Shenyuan C, Guoyou Z, Chen K, Hui Q, Wenrong X, Zhai X. A swift expanding trend of extracellular vesicles in spinal cord injury research: a bibliometric analysis. J Nanobiotechnology 2023; 21:289. [PMID: 37612689 PMCID: PMC10463993 DOI: 10.1186/s12951-023-02051-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 08/04/2023] [Indexed: 08/25/2023] Open
Abstract
Extracellular vesicles (EVs) in the field of spinal cord injury (SCI) have garnered significant attention for their potential applications in diagnosis and therapy. However, no bibliometric assessment has been conducted to evaluate the scientific progress in this area. A search of articles in Web of Science (WoS) from January 1, 1991, to May 1, 2023, yielded 359 papers that were analyzed using various online analysis tools. These articles have been cited 10,842 times with 30.2 times per paper. The number of publications experienced explosive growth starting in 2015. China and the United States led this research initiative. Keywords were divided into 3 clusters, including "Pathophysiology of SCI", "Bioactive components of EVs", and "Therapeutic effects of EVs in SCI". By integrating the average appearing year (AAY) of keywords in VoSviewer with the time zone map of the Citation Explosion in CiteSpace, the focal point of research has undergone a transformative shift. The emphasis has moved away from pathophysiological factors such as "axon", "vesicle", and "glial cell" to more mechanistic and applied domains such as "activation", "pathways", "hydrogels" and "therapy". In conclusions, institutions are expected to allocate more resources towards EVs-loaded hydrogel therapy and the utilization of innovative materials for injury mitigation.
Collapse
Affiliation(s)
- Fan Zhiguo
- Department of Orthopedics, Shanghai Changhai Hospital, Shanghai, 200433, China
| | - Wu Ji
- Department of Orthopedics, Shanghai Changhai Hospital, Shanghai, 200433, China
| | - Chen Shenyuan
- Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine, Jiangsu University, Zhenjiang, China
| | - Zhang Guoyou
- Department of Orthopedics, Shanghai Changhai Hospital, Shanghai, 200433, China
| | - Kai Chen
- Department of Orthopedics, Shanghai Changhai Hospital, Shanghai, 200433, China.
| | - Qian Hui
- Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine, Jiangsu University, Zhenjiang, China.
| | - Xu Wenrong
- Key Laboratory of Laboratory Medicine of Jiangsu Province, School of Medicine, Jiangsu University, Zhenjiang, China.
| | - Xiao Zhai
- Department of Orthopedics, Shanghai Changhai Hospital, Shanghai, 200433, China.
| |
Collapse
|
21
|
Alves-Sampaio A, Del-Cerro P, Collazos-Castro JE. Composite Fibrin/Carbon Microfiber Implants for Bridging Spinal Cord Injury: A Translational Approach in Pigs. Int J Mol Sci 2023; 24:11102. [PMID: 37446280 DOI: 10.3390/ijms241311102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 06/29/2023] [Accepted: 07/02/2023] [Indexed: 07/15/2023] Open
Abstract
Biomaterials may enhance neural repair after spinal cord injury (SCI) and testing their functionality in large animals is essential to achieve successful clinical translation. This work developed a porcine contusion/compression SCI model to investigate the consequences of myelotomy and implantation of fibrin gel containing biofunctionalized carbon microfibers (MFs). Fourteen pigs were distributed in SCI, SCI/myelotomy, and SCI/myelotomy/implant groups. An automated device was used for SCI. A dorsal myelotomy was performed on the lesion site at 1 day post-injury for removing cloths and devitalized tissue. Bundles of MFs coated with a conducting polymer and cell adhesion molecules were embedded in fibrin gel and used to bridge the spinal cord cavity. Reproducible lesions of about 1 cm in length were obtained. Myelotomy and lesion debridement caused no further neural damage compared to SCI alone but had little positive effect on neural regrowth. The MFs/fibrin gel implant facilitated axonal sprouting, elongation, and alignment within the lesion. However, the implant also increased lesion volume and was ineffective in preventing fibrosis, thus precluding functional neural regeneration. Our results indicate that myelotomy and lesion debridement can be advantageously used for implanting MF-based scaffolds. However, the implants need refinement and pharmaceuticals will be necessary to limit scarring.
Collapse
Affiliation(s)
- Alexandra Alves-Sampaio
- Neural Repair and Biomaterials Laboratory, Hospital Nacional de Parapléjicos (SESCAM), Finca La Peraleda S-N, 45071 Toledo, Spain
| | - Patricia Del-Cerro
- Neural Repair and Biomaterials Laboratory, Hospital Nacional de Parapléjicos (SESCAM), Finca La Peraleda S-N, 45071 Toledo, Spain
| | - Jorge E Collazos-Castro
- Neural Repair and Biomaterials Laboratory, Hospital Nacional de Parapléjicos (SESCAM), Finca La Peraleda S-N, 45071 Toledo, Spain
| |
Collapse
|
22
|
Shahemi NH, Mahat MM, Asri NAN, Amir MA, Ab Rahim S, Kasri MA. Application of Conductive Hydrogels on Spinal Cord Injury Repair: A Review. ACS Biomater Sci Eng 2023. [PMID: 37364251 DOI: 10.1021/acsbiomaterials.3c00194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
Spinal cord injury (SCI) causes severe motor or sensory damage that leads to long-term disabilities due to disruption of electrical conduction in neuronal pathways. Despite current clinical therapies being used to limit the propagation of cell or tissue damage, the need for neuroregenerative therapies remains. Conductive hydrogels have been considered a promising neuroregenerative therapy due to their ability to provide a pro-regenerative microenvironment and flexible structure, which conforms to a complex SCI lesion. Furthermore, their conductivity can be utilized for noninvasive electrical signaling in dictating neuronal cell behavior. However, the ability of hydrogels to guide directional axon growth to reach the distal end for complete nerve reconnection remains a critical challenge. In this Review, we highlight recent advances in conductive hydrogels, including the incorporation of conductive materials, fabrication techniques, and cross-linking interactions. We also discuss important characteristics for designing conductive hydrogels for directional growth and regenerative therapy. We propose insights into electrical conductivity properties in a hydrogel that could be implemented as guidance for directional cell growth for SCI applications. Specifically, we highlight the practical implications of recent findings in the field, including the potential for conductive hydrogels to be used in clinical applications. We conclude that conductive hydrogels are a promising neuroregenerative therapy for SCI and that further research is needed to optimize their design and application.
Collapse
Affiliation(s)
- Nur Hidayah Shahemi
- Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
| | - Mohd Muzamir Mahat
- Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
| | - Nurul Ain Najihah Asri
- Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
| | - Muhammad Abid Amir
- Faculty of Medicine, Sungai Buloh Campus, Universiti Teknologi MARA, 47000 Sungai Buloh, Selangor, Malaysia
| | - Sharaniza Ab Rahim
- Faculty of Medicine, Sungai Buloh Campus, Universiti Teknologi MARA, 47000 Sungai Buloh, Selangor, Malaysia
| | - Mohamad Arif Kasri
- Kulliyyah of Science, International Islamic University Malaysia, 25200 Kuantan, Pahang, Malaysia
| |
Collapse
|
23
|
Hu X, Xu W, Ren Y, Wang Z, He X, Huang R, Ma B, Zhao J, Zhu R, Cheng L. Spinal cord injury: molecular mechanisms and therapeutic interventions. Signal Transduct Target Ther 2023; 8:245. [PMID: 37357239 DOI: 10.1038/s41392-023-01477-6] [Citation(s) in RCA: 60] [Impact Index Per Article: 60.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 03/22/2023] [Accepted: 05/07/2023] [Indexed: 06/27/2023] Open
Abstract
Spinal cord injury (SCI) remains a severe condition with an extremely high disability rate. The challenges of SCI repair include its complex pathological mechanisms and the difficulties of neural regeneration in the central nervous system. In the past few decades, researchers have attempted to completely elucidate the pathological mechanism of SCI and identify effective strategies to promote axon regeneration and neural circuit remodeling, but the results have not been ideal. Recently, new pathological mechanisms of SCI, especially the interactions between immune and neural cell responses, have been revealed by single-cell sequencing and spatial transcriptome analysis. With the development of bioactive materials and stem cells, more attention has been focused on forming intermediate neural networks to promote neural regeneration and neural circuit reconstruction than on promoting axonal regeneration in the corticospinal tract. Furthermore, technologies to control physical parameters such as electricity, magnetism and ultrasound have been constantly innovated and applied in neural cell fate regulation. Among these advanced novel strategies and technologies, stem cell therapy, biomaterial transplantation, and electromagnetic stimulation have entered into the stage of clinical trials, and some of them have already been applied in clinical treatment. In this review, we outline the overall epidemiology and pathophysiology of SCI, expound on the latest research progress related to neural regeneration and circuit reconstruction in detail, and propose future directions for SCI repair and clinical applications.
Collapse
Affiliation(s)
- Xiao Hu
- Division of Spine, Department of Orthopaedics, Tongji Hospital, Tongji University School of Medicine, 200065, Shanghai, China
- Key Laboratory of Spine and Spinal cord Injury Repair and Regeneration (Tongji University), Ministry of Education, 200065, Shanghai, China
- Clinical Center For Brain And Spinal Cord Research, Tongji University, 200065, Shanghai, China
| | - Wei Xu
- Division of Spine, Department of Orthopaedics, Tongji Hospital, Tongji University School of Medicine, 200065, Shanghai, China
- Key Laboratory of Spine and Spinal cord Injury Repair and Regeneration (Tongji University), Ministry of Education, 200065, Shanghai, China
- Clinical Center For Brain And Spinal Cord Research, Tongji University, 200065, Shanghai, China
| | - Yilong Ren
- Division of Spine, Department of Orthopaedics, Tongji Hospital, Tongji University School of Medicine, 200065, Shanghai, China
- Key Laboratory of Spine and Spinal cord Injury Repair and Regeneration (Tongji University), Ministry of Education, 200065, Shanghai, China
- Clinical Center For Brain And Spinal Cord Research, Tongji University, 200065, Shanghai, China
| | - Zhaojie Wang
- Division of Spine, Department of Orthopaedics, Tongji Hospital, Tongji University School of Medicine, 200065, Shanghai, China
- Key Laboratory of Spine and Spinal cord Injury Repair and Regeneration (Tongji University), Ministry of Education, 200065, Shanghai, China
- Clinical Center For Brain And Spinal Cord Research, Tongji University, 200065, Shanghai, China
| | - Xiaolie He
- Division of Spine, Department of Orthopaedics, Tongji Hospital, Tongji University School of Medicine, 200065, Shanghai, China
- Key Laboratory of Spine and Spinal cord Injury Repair and Regeneration (Tongji University), Ministry of Education, 200065, Shanghai, China
- Clinical Center For Brain And Spinal Cord Research, Tongji University, 200065, Shanghai, China
| | - Runzhi Huang
- Division of Spine, Department of Orthopaedics, Tongji Hospital, Tongji University School of Medicine, 200065, Shanghai, China
- Key Laboratory of Spine and Spinal cord Injury Repair and Regeneration (Tongji University), Ministry of Education, 200065, Shanghai, China
- Clinical Center For Brain And Spinal Cord Research, Tongji University, 200065, Shanghai, China
| | - Bei Ma
- Division of Spine, Department of Orthopaedics, Tongji Hospital, Tongji University School of Medicine, 200065, Shanghai, China
- Key Laboratory of Spine and Spinal cord Injury Repair and Regeneration (Tongji University), Ministry of Education, 200065, Shanghai, China
- Clinical Center For Brain And Spinal Cord Research, Tongji University, 200065, Shanghai, China
| | - Jingwei Zhao
- Division of Spine, Department of Orthopaedics, Tongji Hospital, Tongji University School of Medicine, 200065, Shanghai, China
- Key Laboratory of Spine and Spinal cord Injury Repair and Regeneration (Tongji University), Ministry of Education, 200065, Shanghai, China
- Clinical Center For Brain And Spinal Cord Research, Tongji University, 200065, Shanghai, China
| | - Rongrong Zhu
- Division of Spine, Department of Orthopaedics, Tongji Hospital, Tongji University School of Medicine, 200065, Shanghai, China.
- Key Laboratory of Spine and Spinal cord Injury Repair and Regeneration (Tongji University), Ministry of Education, 200065, Shanghai, China.
- Clinical Center For Brain And Spinal Cord Research, Tongji University, 200065, Shanghai, China.
| | - Liming Cheng
- Division of Spine, Department of Orthopaedics, Tongji Hospital, Tongji University School of Medicine, 200065, Shanghai, China.
- Key Laboratory of Spine and Spinal cord Injury Repair and Regeneration (Tongji University), Ministry of Education, 200065, Shanghai, China.
- Clinical Center For Brain And Spinal Cord Research, Tongji University, 200065, Shanghai, China.
| |
Collapse
|
24
|
Cai M, Chen L, Wang T, Liang Y, Zhao J, Zhang X, Li Z, Wu H. Hydrogel scaffolds in the treatment of spinal cord injury: a review. Front Neurosci 2023; 17:1211066. [PMID: 37325033 PMCID: PMC10266534 DOI: 10.3389/fnins.2023.1211066] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 05/12/2023] [Indexed: 06/17/2023] Open
Abstract
Spinal cord injury (SCI) is a disease of the central nervous system often caused by accidents, and its prognosis is unsatisfactory, with long-term adverse effects on patients' lives. The key to its treatment lies in the improvement of the microenvironment at the injury and the reconstruction of axons, and tissue repair is a promising therapeutic strategy. Hydrogel is a three-dimensional mesh structure with high water content, which has the advantages of biocompatibility, degradability, and adjustability, and can be used to fill pathological defects by injectable flowing hydrophilic material in situ to accurately adapt to the size and shape of the injury. Hydrogels mimic the natural extracellular matrix for cell colonization, guide axon extension, and act as a biological scaffold, which can be used as an excellent carrier to participate in the treatment of SCI. The addition of different materials to make composite hydrogel scaffolds can further enhance their performance in all aspects. In this paper, we introduce several typical composite hydrogels and review the research progress of hydrogel for SCI to provide a reference for the clinical application of hydrogel therapy for SCI.
Collapse
Affiliation(s)
- Manqi Cai
- Dongguan Key Laboratory of Stem Cell and Regenerative Tissue Engineering, The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, China
- Department of Surgery, The Third Hospital of Guangdong Medical University (Longjiang Hospital of Shunde District), Foshan, China
| | - Liji Chen
- Dongguan Key Laboratory of Stem Cell and Regenerative Tissue Engineering, The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, China
| | - Tao Wang
- Department of Surgery, The Third Hospital of Guangdong Medical University (Longjiang Hospital of Shunde District), Foshan, China
| | - Yinru Liang
- Dongguan Key Laboratory of Stem Cell and Regenerative Tissue Engineering, The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, China
| | - Jie Zhao
- Dongguan Key Laboratory of Stem Cell and Regenerative Tissue Engineering, The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, China
| | - Xiaomin Zhang
- Dongguan Key Laboratory of Stem Cell and Regenerative Tissue Engineering, The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, China
| | - Ziyi Li
- Dongguan Key Laboratory of Stem Cell and Regenerative Tissue Engineering, The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, China
- The Second Clinical Medical College, Guangdong Medical University, Dongguan, China
| | - Hongfu Wu
- Dongguan Key Laboratory of Stem Cell and Regenerative Tissue Engineering, The First Dongguan Affiliated Hospital, Guangdong Medical University, Dongguan, China
| |
Collapse
|
25
|
Long L, Ji D, Hu C, Yang L, Tang S, Wang Y. Microneedles for in situ tissue regeneration. Mater Today Bio 2023; 19:100579. [PMID: 36880084 PMCID: PMC9984687 DOI: 10.1016/j.mtbio.2023.100579] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 02/06/2023] [Accepted: 02/10/2023] [Indexed: 02/13/2023] Open
Abstract
Tissue injury is a common clinical problem, which may cause great burden on patients' life. It is important to develop functional scaffolds to promote tissue repair and regeneration. Due to their unique composition and structure, microneedles have attracted extensive attention in various tissues regeneration, including skin wound, corneal injury, myocardial infarction, endometrial injury, and spinal cord injury et al. Microneedles with micro-needle structure can effectively penetrate the barriers of necrotic tissue or biofilm, therefore improving the bioavailability of drugs. The use of microneedles to deliver bioactive molecules, mesenchymal stem cells, and growth factors in situ allows for targeted tissue and better spatial distribution. At the same time, microneedles can also provide mechanical support or directional traction for tissue, thus accelerating tissue repair. This review summarized the research progress of microneedles for in situ tissue regeneration over the past decade. At the same time, the shortcomings of existing researches, future research direction and clinical application prospect were also discussed.
Collapse
Affiliation(s)
- Linyu Long
- Aier Eye Institute, Changsha, Hunan Province, 410035, China
- Eye Center of Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Dan Ji
- Eye Center of Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Cheng Hu
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, 610064, China
| | - Li Yang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, 610064, China
- Corresponding author.
| | - Shibo Tang
- Aier Eye Institute, Changsha, Hunan Province, 410035, China
- Aier School of Ophthalmology, Central South University, Changsha, Hunan, 410009, China
- CAS Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, 200031, China
- Corresponding author. Aier Eye Institute, Changsha, Hunan Province, 410035, China.
| | - Yunbing Wang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, 610064, China
- Corresponding author.
| |
Collapse
|
26
|
Barroca N, da Silva DM, Pinto SC, Sousa JPM, Verstappen K, Klymov A, Fernández-San-Argimiro FJ, Madarieta I, Murua O, Olalde B, Papadimitriou L, Karali K, Mylonaki K, Stratakis E, Ranella A, Marques PAAP. Interfacing reduced graphene oxide with an adipose-derived extracellular matrix as a regulating milieu for neural tissue engineering. BIOMATERIALS ADVANCES 2023; 148:213351. [PMID: 36842343 DOI: 10.1016/j.bioadv.2023.213351] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 01/31/2023] [Accepted: 02/14/2023] [Indexed: 02/19/2023]
Abstract
Enthralling evidence of the potential of graphene-based materials for neural tissue engineering is motivating the development of scaffolds using various structures related to graphene such as graphene oxide (GO) or its reduced form. Here, we investigated a strategy based on reduced graphene oxide (rGO) combined with a decellularized extracellular matrix from adipose tissue (adECM), which is still unexplored for neural repair and regeneration. Scaffolds containing up to 50 wt% rGO relative to adECM were prepared by thermally induced phase separation assisted by carbodiimide (EDC) crosslinking. Using partially reduced GO enables fine-tuning of the structural interaction between rGO and adECM. As the concentration of rGO increased, non-covalent bonding gradually prevailed over EDC-induced covalent conjugation with the adECM. Edge-to-edge aggregation of rGO favours adECM to act as a biomolecular physical crosslinker to rGO, leading to the softening of the scaffolds. The unique biochemistry of adECM allows neural stem cells to adhere and grow. Importantly, high rGO concentrations directly control cell fate by inducing the differentiation of both NE-4C cells and embryonic neural progenitor cells into neurons. Furthermore, primary astrocyte fate is also modulated as increasing rGO boosts the expression of reactivity markers while unaltering the expression of scar-forming ones.
Collapse
Affiliation(s)
- Nathalie Barroca
- TEMA - Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal; LASI - Intelligent Systems Associate Laboratory, Portugal.
| | - Daniela M da Silva
- TEMA - Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal; LASI - Intelligent Systems Associate Laboratory, Portugal
| | - Susana C Pinto
- TEMA - Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal; LASI - Intelligent Systems Associate Laboratory, Portugal
| | - Joana P M Sousa
- TEMA - Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal; LASI - Intelligent Systems Associate Laboratory, Portugal
| | - Kest Verstappen
- Radboud University Nijmegen Medical Centre, Department of Regenerative Biomaterials, 6500HB Nijmegen, the Netherlands
| | - Alexey Klymov
- Radboud University Nijmegen Medical Centre, Department of Regenerative Biomaterials, 6500HB Nijmegen, the Netherlands
| | | | - Iratxe Madarieta
- TECNALIA, Basque Research and Technology Alliance (BRTA), E20009 Donostia-San Sebastian, Spain
| | - Olatz Murua
- TECNALIA, Basque Research and Technology Alliance (BRTA), E20009 Donostia-San Sebastian, Spain
| | - Beatriz Olalde
- TECNALIA, Basque Research and Technology Alliance (BRTA), E20009 Donostia-San Sebastian, Spain
| | - Lina Papadimitriou
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (FORTH), Heraklion, 71003, Greece
| | - Kanelina Karali
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (FORTH), Heraklion, 71003, Greece
| | - Konstantina Mylonaki
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (FORTH), Heraklion, 71003, Greece
| | - Emmanuel Stratakis
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (FORTH), Heraklion, 71003, Greece
| | - Anthi Ranella
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas (FORTH), Heraklion, 71003, Greece.
| | - Paula A A P Marques
- TEMA - Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal; LASI - Intelligent Systems Associate Laboratory, Portugal.
| |
Collapse
|
27
|
Suzuki H, Imajo Y, Funaba M, Ikeda H, Nishida N, Sakai T. Current Concepts of Biomaterial Scaffolds and Regenerative Therapy for Spinal Cord Injury. Int J Mol Sci 2023; 24:ijms24032528. [PMID: 36768846 PMCID: PMC9917245 DOI: 10.3390/ijms24032528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/05/2023] [Accepted: 01/11/2023] [Indexed: 02/03/2023] Open
Abstract
Spinal cord injury (SCI) is a catastrophic condition associated with significant neurological deficit and social and financial burdens. It is currently being managed symptomatically, with no real therapeutic strategies available. In recent years, a number of innovative regenerative strategies have emerged and have been continuously investigated in preclinical research and clinical trials. In the near future, several more are expected to come down the translational pipeline. Among ongoing and completed trials are those reporting the use of biomaterial scaffolds. The advancements in biomaterial technology, combined with stem cell therapy or other regenerative therapy, can now accelerate the progress of promising novel therapeutic strategies from bench to bedside. Various types of approaches to regeneration therapy for SCI have been combined with the use of supportive biomaterial scaffolds as a drug and cell delivery system to facilitate favorable cell-material interactions and the supportive effect of neuroprotection. In this review, we summarize some of the most recent insights of preclinical and clinical studies using biomaterial scaffolds in regenerative therapy for SCI and summarized the biomaterial strategies for treatment with simplified results data. One hundred and sixty-eight articles were selected in the present review, in which we focused on biomaterial scaffolds. We conducted our search of articles using PubMed and Medline, a medical database. We used a combination of "Spinal cord injury" and ["Biomaterial", or "Scaffold"] as search terms and searched articles published up until 30 April 2022. Successful future therapies will require these biomaterial scaffolds and other synergistic approaches to address the persistent barriers to regeneration, including glial scarring, the loss of a structural framework, and biocompatibility. This database could serve as a benchmark to progress in future clinical trials for SCI using biomaterial scaffolds.
Collapse
|
28
|
Liu H, Feng Y, Che S, Guan L, Yang X, Zhao Y, Fang L, Zvyagin AV, Lin Q. An Electroconductive Hydrogel Scaffold with Injectability and Biodegradability to Manipulate Neural Stem Cells for Enhancing Spinal Cord Injury Repair. Biomacromolecules 2023; 24:86-97. [PMID: 36512504 DOI: 10.1021/acs.biomac.2c00920] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Spinal cord injury (SCI) generally leads to long-term functional deficits and is difficult to repair spontaneously. Many biological scaffold materials and stem cell treatment strategies have been explored, but very little research focused on the method of combining exogenous neural stem cells (NSCs) with a biodegradable conductive hydrogel scaffold. Here, a NSC loaded conductive hydrogel scaffold (named ICH/NSCs) was assembled by amino-modified gelatin (NH2-Gelatin) and aniline tetramer grafted oxidized hyaluronic acid (AT-OHA). Desirably, the well-conducting ICH/NSCs can be simply injected into the target site of SCI for establishing a good electrical signal pathway of cells, and the proper degradation cycle facilitates new nerve growth. In vitro experiments indicated that the inherent electroactive microenvironment of the hydrogel could better manipulate the differentiation of NSCs into neurons and inhibit the formation of glial cells and scars. Collectively, the ICH/NSC scaffold has successfully stimulated the recovery of SCI and may provide a promising treatment strategy for SCI repair.
Collapse
Affiliation(s)
- Hou Liu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Yubin Feng
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Songtian Che
- Department of Ocular Fundus Disease, The Second Hospital of Jilin University, Changchun 130022, P. R. China
| | - Lin Guan
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Xinting Yang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Yue Zhao
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| | - Linan Fang
- Department of Thoracic Surgery, The First Hospital of Jilin University, Changchun 130000, P. R. China
| | - Andrei V Zvyagin
- Australian Research Council Centre of Excellence for Nanoscale Biophotonics, Macquarie University, Sydney, NSW 2109, Australia.,Institute of Biology and Biomedicine, Lobachevsky Nizhny Novgorod State University, Nizhny Novgorod 603105, Russia
| | - Quan Lin
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, P. R. China
| |
Collapse
|
29
|
Feng C, Deng L, Yong YY, Wu JM, Qin DL, Yu L, Zhou XG, Wu AG. The Application of Biomaterials in Spinal Cord Injury. Int J Mol Sci 2023; 24:816. [PMID: 36614259 PMCID: PMC9821025 DOI: 10.3390/ijms24010816] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/19/2022] [Accepted: 12/30/2022] [Indexed: 01/05/2023] Open
Abstract
The spinal cord and the brain form the central nervous system (CNS), which is the most important part of the body. However, spinal cord injury (SCI) caused by external forces is one of the most difficult types of neurological injury to treat, resulting in reduced or even absent motor, sensory and autonomic functions. It leads to the reduction or even disappearance of motor, sensory and self-organizing nerve functions. Currently, its incidence is increasing each year worldwide. Therefore, the development of treatments for SCI is urgently needed in the clinic. To date, surgery, drug therapy, stem cell transplantation, regenerative medicine, and rehabilitation therapy have been developed for the treatment of SCI. Among them, regenerative biomaterials that use tissue engineering and bioscaffolds to transport cells or drugs to the injured site are considered the most promising option. In this review, we briefly introduce SCI and its molecular mechanism and summarize the application of biomaterials in the repair and regeneration of tissue in various models of SCI. However, there is still limited evidence about the treatment of SCI with biomaterials in the clinic. Finally, this review will provide inspiration and direction for the future study and application of biomaterials in the treatment of SCI.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Xiao-Gang Zhou
- Sichuan Key Medical Laboratory of New Drug Discovery and Drugability Evaluation, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, Key Laboratory of Medical Electrophysiology of Ministry of Education, School of Pharmacy, Southwest Medical University, Luzhou 646000, China
| | - An-Guo Wu
- Sichuan Key Medical Laboratory of New Drug Discovery and Drugability Evaluation, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, Key Laboratory of Medical Electrophysiology of Ministry of Education, School of Pharmacy, Southwest Medical University, Luzhou 646000, China
| |
Collapse
|
30
|
Liu S, Song L, Dai W, Liu M, Zhang H, Zhang X, Li H, Liu X, Lv Y, Hu Y. Worldwide productivity and research trend of publications concerning electroactive materials and spinal cord injury: A bibliometric study. Front Bioeng Biotechnol 2023; 11:1094059. [PMID: 36923456 PMCID: PMC10009169 DOI: 10.3389/fbioe.2023.1094059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 02/09/2023] [Indexed: 03/02/2023] Open
Abstract
Purpose: We investigated the current state and trends in the area during the previous 10 years using bibliometric approaches to evaluate the global scientific output of research on electroactive materials and spinal cord injury. Methods: Studies on spinal cord injury in electroactive materials that were published between 2012 and 2022 were located using the Web of science (WOS) datebase. The software programs bibliometrix R-package and CiteSpace were used to do quantitative analyses of annual publications, nation, author, institution, journal source, co-cited references, and keywords. The studies were categorized by the research's main points using a qualitative analysis, and publications having more than 10 citations each year. Results: In the final analysis, 1,330 relevant papers or reviews were included. There is an increased tendency in both the average annual citation rate and the number of publications in the discipline. The United States and the University of Toronto are the countries and institutions that have contributed the most to this discipline, respectively. The majority of authors are from the China and United States. Zhang Y is the author with the most published articles and holds the top position in the cited author h-index species. The journal with the highest number of published articles is "Disability and rehabilitation"; the journal is divided into four main areas including physics, materials, chemistry, molecular, and biology. The keyword analysis revealed a shift in research hotspots from schwann cell, fracture, and urinary disorders to carbon-based materials, functional recovery, and surgery. Analysis of qualitative data revealed that the role and mechanism of injectable conductive hydrogels in spinal cord healing after damage is a hot topic of current study, with the mechanism primarily focusing on the inhibition of oxidative stress (Nrf2) and apoptosis (Casepase 3). Conclusion: Our bibliometric analysis indicates that research on electroactive materials for spinal cord injury remains an active field of study. Moreover, contemporary research is concentrated on carbon-based materials, functional rehabilitation, and surgery.
Collapse
Affiliation(s)
- Sirui Liu
- Beijing Institute of Dental Research, Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - Lin Song
- Beijing Institute of Dental Research, Beijing Stomatological Hospital, Capital Medical University, Beijing, China.,Department of Periodontology, Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - Weishu Dai
- Beijing Institute of Dental Research, Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - Mengdie Liu
- The Third Medical Center of PLA General Hospital, Beijing, China.,The First Medical Center of PLA General Hospital, Beijing, China
| | - Huijing Zhang
- Beijing Institute of Dental Research, Beijing Stomatological Hospital, Capital Medical University, Beijing, China.,Department of Periodontology, Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - Xueyan Zhang
- Beijing Institute of Dental Research, Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - Hongyu Li
- Beijing Institute of Dental Research, Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - Xiu Liu
- Beijing Institute of Dental Research, Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - Yan Lv
- Beijing Institute of Dental Research, Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| | - Ying Hu
- Beijing Institute of Dental Research, Beijing Stomatological Hospital, Capital Medical University, Beijing, China
| |
Collapse
|
31
|
Wang H, Zhang H, Xie Z, Chen K, Ma M, Huang Y, Li M, Cai Z, Wang P, Shen H. Injectable hydrogels for spinal cord injury repair. ENGINEERED REGENERATION 2022. [DOI: 10.1016/j.engreg.2022.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
|
32
|
Girão AF, Serrano MC, Completo A, Marques PAAP. Is Graphene Shortening the Path toward Spinal Cord Regeneration? ACS NANO 2022; 16:13430-13467. [PMID: 36000717 PMCID: PMC9776589 DOI: 10.1021/acsnano.2c04756] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Along with the development of the next generation of biomedical platforms, the inclusion of graphene-based materials (GBMs) into therapeutics for spinal cord injury (SCI) has potential to nourish topmost neuroprotective and neuroregenerative strategies for enhancing neural structural and physiological recovery. In the context of SCI, contemplated as one of the most convoluted challenges of modern medicine, this review first provides an overview of its characteristics and pathophysiological features. Then, the most relevant ongoing clinical trials targeting SCI, including pharmaceutical, robotics/neuromodulation, and scaffolding approaches, are introduced and discussed in sequence with the most important insights brought by GBMs into each particular topic. The current role of these nanomaterials on restoring the spinal cord microenvironment after injury is critically contextualized, while proposing future concepts and desirable outputs for graphene-based technologies aiming to reach clinical significance for SCI.
Collapse
Affiliation(s)
- André F. Girão
- Centre
for Mechanical Technology and Automation (TEMA), Department of Mechanical
Engineering, University of Aveiro (UA), Aveiro, 3810-193, Portugal
- Instituto
de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Calle Sor Juana Inés de la
Cruz 3, Madrid, 28049, Spain
- (A.F.G.)
| | - María Concepcion Serrano
- Instituto
de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Calle Sor Juana Inés de la
Cruz 3, Madrid, 28049, Spain
- (M.C.S.)
| | - António Completo
- Centre
for Mechanical Technology and Automation (TEMA), Department of Mechanical
Engineering, University of Aveiro (UA), Aveiro, 3810-193, Portugal
| | - Paula A. A. P. Marques
- Centre
for Mechanical Technology and Automation (TEMA), Department of Mechanical
Engineering, University of Aveiro (UA), Aveiro, 3810-193, Portugal
- (P.A.A.P.M.)
| |
Collapse
|
33
|
Main Cations and Cellular Biology of Traumatic Spinal Cord Injury. Cells 2022; 11:cells11162503. [PMID: 36010579 PMCID: PMC9406880 DOI: 10.3390/cells11162503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 08/06/2022] [Accepted: 08/09/2022] [Indexed: 02/08/2023] Open
Abstract
Traumatic spinal cord injury is a life-changing condition with a significant socio-economic impact on patients, their relatives, their caregivers, and even the community. Despite considerable medical advances, there is still a lack of options for the effective treatment of these patients. The major complexity and significant disabling potential of the pathophysiology that spinal cord trauma triggers are the main factors that have led to incremental scientific research on this topic, including trying to describe the molecular and cellular mechanisms that regulate spinal cord repair and regeneration. Scientists have identified various practical approaches to promote cell growth and survival, remyelination, and neuroplasticity in this part of the central nervous system. This review focuses on specific detailed aspects of the involvement of cations in the cell biology of such pathology and on the possibility of repairing damaged spinal cord tissue. In this context, the cellular biology of sodium, potassium, lithium, calcium, and magnesium is essential for understanding the related pathophysiology and also the possibilities to counteract the harmful effects of traumatic events. Lithium, sodium, potassium—monovalent cations—and calcium and magnesium—bivalent cations—can influence many protein–protein interactions, gene transcription, ion channel functions, cellular energy processes—phosphorylation, oxidation—inflammation, etc. For data systematization and synthesis, we used the Preferred Reporting Items for Systematic Reviews and Meta-Analyzes (PRISMA) methodology, trying to make, as far as possible, some order in seeing the “big forest” instead of “trees”. Although we would have expected a large number of articles to address the topic, we were still surprised to find only 51 unique articles after removing duplicates from the 207 articles initially identified. Our article integrates data on many biochemical processes influenced by cations at the molecular level to understand the real possibilities of therapeutic intervention—which must maintain a very narrow balance in cell ion concentrations. Multimolecular, multi-cellular: neuronal cells, glial cells, non-neuronal cells, but also multi-ionic interactions play an important role in the balance between neuro-degenerative pathophysiological processes and the development of effective neuroprotective strategies. This article emphasizes the need for studying cation dynamics as an important future direction.
Collapse
|
34
|
Fan C, Yang W, Zhang L, Cai H, Zhuang Y, Chen Y, Zhao Y, Dai J. Restoration of spinal cord biophysical microenvironment for enhancing tissue repair by injury-responsive smart hydrogel. Biomaterials 2022; 288:121689. [DOI: 10.1016/j.biomaterials.2022.121689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 06/10/2022] [Accepted: 07/18/2022] [Indexed: 11/02/2022]
|
35
|
Xu X, Wang L, Jing J, Zhan J, Xu C, Xie W, Ye S, Zhao Y, Zhang C, Huang F. Conductive Collagen-Based Hydrogel Combined With Electrical Stimulation to Promote Neural Stem Cell Proliferation and Differentiation. Front Bioeng Biotechnol 2022; 10:912497. [PMID: 35782495 PMCID: PMC9247657 DOI: 10.3389/fbioe.2022.912497] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 05/23/2022] [Indexed: 12/05/2022] Open
Abstract
Injectable biomimetic hydrogels are a promising strategy for enhancing tissue repair after spinal cord injury (SCI) by restoring electrical signals and increasing stem cell differentiation. However, fabricating hydrogels that simultaneously exhibit high electrical conductivities, excellent mechanical properties, and biocompatibility remains a great challenge. In the present study, a collagen-based self-assembling cross-linking polymer network (SCPN) hydrogel containing poly-pyrrole (PPy), which imparted electroconductive properties, is developed for potential application in SCI repair. The prepared collagen/polypyrrole (Col/PPy)-based hydrogel exhibited a continuous and porous structure with pore sizes ranging from 50 to 200 μm. Mechanical test results indicated that the Young’s moduli of the prepared hydrogels were remarkably enhanced with PPy content in the range 0–40 mM. The conductivity of Col/PPy40 hydrogel was 0.176 ± 0.07 S/cm, which was beneficial for mediating electrical signals between tissues and accelerating the rate of nerve repair. The investigations of swelling and degradation of the hydrogels indicated that PPy chains interpenetrated and entangled with the collagen, thereby tightening the network structure of the hydrogel and improving its stability. The cell count kit-8 (CCK-8) assay and live/dead staining assay demonstrated that Col/PPy40 coupled with electrical simulation promoted the proliferation and survival of neural stem cells (NSCs). Compared with the other groups, the immunocytochemical analysis, qPCR, and Western blot studies suggested that Col/PPy40 coupled with ES maximally induced the differentiation of NSCs into neurons and inhibited the differentiation of NSCs into astrocytes. The results also indicated that the neurons in ES-treated Col/PPy40 hydrogel have longer neurites (170.8 ± 37.2 μm) and greater numbers of branch points (4.7 ± 1.2). Therefore, the prepared hydrogel system coupled with ES has potential prospects in the field of SCI treatment.
Collapse
Affiliation(s)
- Xinzhong Xu
- Department of Orthopaedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Lin Wang
- Department of Orthopaedics, Yijishan Hospital of Wannan Medical College, Wuhu, China
| | - Juehua Jing
- Department of Orthopaedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Junfeng Zhan
- Department of Orthopaedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Chungui Xu
- Department of Orthopaedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Wukun Xie
- Department of Orthopaedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Shuming Ye
- Department of Orthopaedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Yao Zhao
- Department of Orthopaedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Chi Zhang
- Department of Orthopaedics, The Fourth Affiliated Hospital of Anhui Medical University, Hefei, China
- *Correspondence: Chi Zhang, ; Fei Huang,
| | - Fei Huang
- Department of Orthopaedics, The Second Affiliated Hospital of Anhui Medical University, Hefei, China
- *Correspondence: Chi Zhang, ; Fei Huang,
| |
Collapse
|
36
|
Lv B, Shen N, Cheng Z, Chen Y, Ding H, Yuan J, Zhao K, Zhang Y. Strategies for Biomaterial-Based Spinal Cord Injury Repair via the TLR4-NF-κB Signaling Pathway. Front Bioeng Biotechnol 2022; 9:813169. [PMID: 35600111 PMCID: PMC9116428 DOI: 10.3389/fbioe.2021.813169] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 12/13/2021] [Indexed: 12/23/2022] Open
Abstract
The repair and motor functional recovery after spinal cord injury (SCI) has remained a clinical challenge. Injury-induced gliosis and inflammation lead to a physical barrier and an extremely inhibitory microenvironment, which in turn hinders the recovery of SCI. TLR4-NF-κB is a classic implant-related innate immunomodulation signaling pathway and part of numerous biomaterial-based treatment strategies for SCI. Numerous experimental studies have demonstrated that the regulation of TLR4-NF-κB signaling pathway plays an important role in the alleviation of inflammatory responses, the modulation of autophagy, apoptosis and ferroptosis, and the enhancement of anti-oxidative effect post-SCI. An increasing number of novel biomaterials have been fabricated as scaffolds and carriers, loaded with phytochemicals and drugs, to inhibit the progression of SCI through regulation of TLR4-NF-κB. This review summarizes the empirical strategies for the recovery after SCI through individual or composite biomaterials that mediate the TLR4-NF-κB signaling pathway.
Collapse
Affiliation(s)
- Bin Lv
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Naiting Shen
- Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhangrong Cheng
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuhang Chen
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hua Ding
- Department of Orthopedics, Affiliated People’s Hospital of Jiangsu University, Zhenjiang, China
| | - Jishan Yuan
- Department of Orthopedics, Affiliated People’s Hospital of Jiangsu University, Zhenjiang, China
| | - Kangchen Zhao
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yukun Zhang
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| |
Collapse
|
37
|
Gao C, Song S, Lv Y, Huang J, Zhang Z. Recent Development of Conductive Hydrogels for Tissue Engineering: Review and Perspective. Macromol Biosci 2022; 22:e2200051. [PMID: 35472125 DOI: 10.1002/mabi.202200051] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Revised: 03/29/2022] [Indexed: 11/11/2022]
Abstract
In recent years, tissue engineering techniques have been rapidly developed and offer a new therapeutic approach to organ or tissue damage repair. However, most of tissue engineering scaffolds are nonconductive and cannot establish effective electrical coupling with tissue for the electroactive tissues. Electroconductive hydrogels (ECHs) have received increasing attention in tissue engineering owing to their electroconductivity, biocompatibility and high water content. In vitro, ECHs can not only promote the communication of electrical signals between cells, but also mediate the adhesion, proliferation, migration, and differentiation of different kinds of cells. In vivo, ECHs can transmit the electric signal to electroactive tissues and activate bioelectrical signaling pathways to promote tissue repair. As a result, implanting ECHs into damaged tissues can effectively reconstruct physiological functions related to electrical conduction. In this review, we first present an overview about the classifications and the fabrication methods of ECHs. And then, the applications of ECHs in tissue engineering, including cardiac, nerve, skin and skeletal muscle tissue, are highlighted. At last, we provide some rational guidelines for designing ECHs towards clinical applications. This article is protected by copyright. All rights reserved.
Collapse
Affiliation(s)
- Chen Gao
- CAS Key Laboratory for Nano-Bio Interface, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, Suzhou, 215123, People's Republic of China
| | - Shaoshuai Song
- CAS Key Laboratory for Nano-Bio Interface, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, Suzhou, 215123, People's Republic of China.,School of Nano-Tech and Nano-Bionics, University of Science and Technology of China (USTC), Hefei, 230026, People's Republic of China
| | - Yinjuan Lv
- CAS Key Laboratory for Nano-Bio Interface, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, Suzhou, 215123, People's Republic of China
| | - Jie Huang
- CAS Key Laboratory for Nano-Bio Interface, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, Suzhou, 215123, People's Republic of China.,School of Nano-Tech and Nano-Bionics, University of Science and Technology of China (USTC), Hefei, 230026, People's Republic of China
| | - Zhijun Zhang
- CAS Key Laboratory for Nano-Bio Interface, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences, Suzhou, 215123, People's Republic of China.,School of Nano-Tech and Nano-Bionics, University of Science and Technology of China (USTC), Hefei, 230026, People's Republic of China
| |
Collapse
|
38
|
Novel Strategies for Spinal Cord Regeneration. Int J Mol Sci 2022; 23:ijms23094552. [PMID: 35562941 PMCID: PMC9102050 DOI: 10.3390/ijms23094552] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 04/17/2022] [Accepted: 04/18/2022] [Indexed: 02/04/2023] Open
Abstract
A spinal cord injury (SCI) is one of the most devastating lesions, as it can damage the continuity and conductivity of the central nervous system, resulting in complex pathophysiology. Encouraged by the advances in nanotechnology, stem cell biology, and materials science, researchers have proposed various interdisciplinary approaches for spinal cord regeneration. In this respect, the present review aims to explore the most recent developments in SCI treatment and spinal cord repair. Specifically, it briefly describes the characteristics of SCIs, followed by an extensive discussion on newly developed nanocarriers (e.g., metal-based, polymer-based, liposomes) for spinal cord delivery, relevant biomolecules (e.g., growth factors, exosomes) for SCI treatment, innovative cell therapies, and novel natural and synthetic biomaterial scaffolds for spinal cord regeneration.
Collapse
|
39
|
Affiliation(s)
- Mehdi Nikkhah
- School of Biological and Health Systems Engineering, Biodesign Virginia G. Piper Center for Personalized Diagnostics, Arizona State University, Tempe, AZ, United States.
| | - Jonathan Rivnay
- Department of Biomedical Engineering, Simpson Querrey Institute, Center for Advanced Regenerative Engineering, Northwestern University, Evanston, IL, United States.
| |
Collapse
|
40
|
Numerous nanoparticles as drug delivery system to control secondary immune response and promote spinal cord injury regeneration. Process Biochem 2022. [DOI: 10.1016/j.procbio.2021.11.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
41
|
Yang B, Liang C, Chen D, Cheng F, Zhang Y, Wang S, Shu J, Huang X, Wang J, Xia K, Ying L, Shi K, Wang C, Wang X, Li F, Zhao Q, Chen Q. A conductive supramolecular hydrogel creates ideal endogenous niches to promote spinal cord injury repair. Bioact Mater 2021; 15:103-119. [PMID: 35386356 PMCID: PMC8941182 DOI: 10.1016/j.bioactmat.2021.11.032] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 11/15/2021] [Accepted: 11/16/2021] [Indexed: 12/29/2022] Open
Abstract
The current effective method for treatment of spinal cord injury (SCI) is to reconstruct the biological microenvironment by filling the injured cavity area and increasing neuronal differentiation of neural stem cells (NSCs) to repair SCI. However, the method is characterized by several challenges including irregular wounds, and mechanical and electrical mismatch of the material-tissue interface. In the current study, a unique and facile agarose/gelatin/polypyrrole (Aga/Gel/PPy, AGP3) hydrogel with similar conductivity and modulus as the spinal cord was developed by altering the concentration of Aga and PPy. The gelation occurred through non-covalent interactions, and the physically crosslinked features made the AGP3 hydrogels injectable. In vitro cultures showed that AGP3 hydrogel exhibited excellent biocompatibility, and promoted differentiation of NSCs toward neurons whereas it inhibited over-proliferation of astrocytes. The in vivo implanted AGP3 hydrogel completely covered the tissue defects and reduced injured cavity areas. In vivo studies further showed that the AGP3 hydrogel provided a biocompatible microenvironment for promoting endogenous neurogenesis rather than glial fibrosis formation, resulting in significant functional recovery. RNA sequencing analysis further indicated that AGP3 hydrogel significantly modulated expression of neurogenesis-related genes through intracellular Ca2+ signaling cascades. Overall, this supramolecular strategy produces AGP3 hydrogel that can be used as favorable biomaterials for SCI repair by filling the cavity and imitating the physiological properties of the spinal cord. A facile strategy was developed to fabricate AGP3 hydrogel satisfying physiological requirements. AGP3 hydrogel promoted the differentiation of NSCs into neurons in vitro. AGP3 hydrogel could activate endogenous neurogenesis to repair spinal cord injury. AGP3 hydrogel modulated expression of neurogenesis-related genes in vitro.
Collapse
|
42
|
Li Z, Wang Q, Hu H, Zheng W, Gao C. Research advances of biomaterials-based microenvironment-regulation therapies for repair and regeneration of spinal cord injury. Biomed Mater 2021; 16. [PMID: 34384071 DOI: 10.1088/1748-605x/ac1d3c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 08/12/2021] [Indexed: 12/15/2022]
Abstract
Traumatic spinal cord injury (SCI) usually results in restricted behaviour recovery and even life-changing paralysis, accompanied with numerous complications. Pathologically, the initial injuries trigger a series of secondary injuries, leading to an expansion of lesion site, a mass of neuron loss, and eventual failure of endogenous axon regeneration. As the advances rapidly spring up in regenerative medicine and tissue engineering biomaterials, regulation of these secondary injuries becomes possible, shedding a light on normal functional restoration. The successful tissue regeneration lies in proper regulation of the inflammatory microenvironment, including the inflammatory immune cells and inflammatory factors that lead to oxidative stress, inhibitory glial scar and neuroexcitatory toxicity. Specifically, the approaches based on microenvironment-regulating biomaterials have shown great promise in the repair and regeneration of SCI. In this review, the pathological inflammatory microenvironments of SCI are discussed, followed by the introduction of microenvironment-regulating biomaterials in terms of their impressive therapeutic effect in attenuation of secondary inflammation and promotion of axon regrowth. With the emphasis on regulating secondary events, the biomaterials for SCI treatment will become promising for clinical applications.
Collapse
Affiliation(s)
- Ziming Li
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, People's Republic of China
| | - Qiaoxuan Wang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, People's Republic of China
| | - Haijun Hu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, People's Republic of China
| | - Weiwei Zheng
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, People's Republic of China
| | - Changyou Gao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, People's Republic of China.,Dr Li Dak Sum and Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Hangzhou, People's Republic of China
| |
Collapse
|
43
|
Kiyotake EA, Thomas EE, Homburg HB, Milton CK, Smitherman AD, Donahue ND, Fung KM, Wilhelm S, Martin MD, Detamore MS. Conductive and injectable hyaluronic acid/gelatin/gold nanorod hydrogels for enhanced surgical translation and bioprinting. J Biomed Mater Res A 2021; 110:365-382. [PMID: 34390325 DOI: 10.1002/jbm.a.37294] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 07/24/2021] [Accepted: 08/02/2021] [Indexed: 12/25/2022]
Abstract
There is growing evidence indicating the need to combine the rehabilitation and regenerative medicine fields to maximize functional recovery after spinal cord injury (SCI), but there are limited methods to synergistically combine the fields. Conductive biomaterials may enable synergistic combination of biomaterials with electric stimulation (ES), which may enable direct ES of neurons to enhance axon regeneration and reorganization for better functional recovery; however, there are three major challenges in developing conductive biomaterials: (1) low conductivity of conductive composites, (2) many conductive components are cytotoxic, and (3) many conductive biomaterials are pre-formed scaffolds and are not injectable. Pre-formed, noninjectable scaffolds may hinder clinical translation in a surgical context for the most common contusion-type of SCI. Alternatively, an injectable biomaterial, inspired by lessons from bioinks in the bioprinting field, may be more translational for contusion SCIs. Therefore, in the current study, a conductive hydrogel was developed by incorporating high aspect ratio citrate-gold nanorods (GNRs) into a hyaluronic acid and gelatin hydrogel. To fabricate nontoxic citrate-GNRs, a robust synthesis for high aspect ratio GNRs was combined with an indirect ligand exchange to exchange a cytotoxic surfactant for nontoxic citrate. For enhanced surgical placement, the hydrogel precursor solution (i.e., before crosslinking) was paste-like, injectable/bioprintable, and fast-crosslinking (i.e., 4 min). Finally, the crosslinked hydrogel supported the adhesion/viability of seeded rat neural stem cells in vitro. The current study developed and characterized a GNR conductive hydrogel/bioink that provided a refinable and translational platform for future synergistic combination with ES to improve functional recovery after SCI.
Collapse
Affiliation(s)
- Emi A Kiyotake
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, Oklahoma, USA
| | - Emily E Thomas
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan, USA
| | - Hannah B Homburg
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Camille K Milton
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Adam D Smitherman
- Department of Neurosurgery, Rush University Medical Center, Chicago, Illinois, USA
| | - Nathan D Donahue
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, Oklahoma, USA
| | - Kar-Ming Fung
- Department of Pathology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Stefan Wilhelm
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, Oklahoma, USA
| | - Michael D Martin
- Department of Neurosurgery, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Michael S Detamore
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, Oklahoma, USA
| |
Collapse
|
44
|
Cao J, Wu J, Mu J, Feng S, Gao J. The design criteria and therapeutic strategy of functional scaffolds for spinal cord injury repair. Biomater Sci 2021; 9:4591-4606. [PMID: 34018520 DOI: 10.1039/d1bm00361e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Spinal cord injury (SCI) remains a therapeutic challenge in clinic. Current drug and cell therapeutics have obtained significant efficacy but are still in the early stages for complete neural and functional recovery. In the past few decades, functional scaffolds (FSs) have been rapidly developed to bridge the lesion and provide a framework for tissue regeneration in SCI repair. Moreover, a FS can act as an adjuvant for locally delivering drugs in the lesion with a designed drug release profile, and supplying a biomimetic environment for implanted cells. In this review, the design criteria of FSs for SCI treatment are summarized according to their biocompatibility, mechanical properties, morphology, architecture, and biodegradability. Subsequently, FSs designed for SCI repair in the scope of drug delivery, cell implantation and combination therapy are introduced, respectively. And how a FS promotes their therapeutic efficacy is analyzed. Finally, the challenges, perspectives, and potential of FSs for SCI treatment are discussed. Hopefully, this review may inspire the future development of potent FSs to facilitate SCI repair in clinic.
Collapse
Affiliation(s)
- Jian Cao
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P.R. China.
| | - Jiahe Wu
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P.R. China.
| | - Jiafu Mu
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P.R. China.
| | - Shiqing Feng
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, 300052, P.R. China. and International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord, Tianjin, 300052, P.R. China
| | - Jianqing Gao
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P.R. China. and Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Hangzhou, 310058, P.R. China
| |
Collapse
|