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Olaya AMS, Almeida FM, Martinez AMB, Marques SA. Treatment of spinal cord injury with biomaterials and stem cell therapy in non-human primates and humans. Neural Regen Res 2025; 20:343-353. [PMID: 38819038 PMCID: PMC11317961 DOI: 10.4103/nrr.nrr-d-23-01752] [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: 10/24/2023] [Revised: 02/27/2024] [Accepted: 03/27/2024] [Indexed: 06/01/2024] Open
Abstract
Spinal cord injury results in the loss of sensory, motor, and autonomic functions, which almost always produces permanent physical disability. Thus, in the search for more effective treatments than those already applied for years, which are not entirely efficient, researches have been able to demonstrate the potential of biological strategies using biomaterials to tissue manufacturing through bioengineering and stem cell therapy as a neuroregenerative approach, seeking to promote neuronal recovery after spinal cord injury. Each of these strategies has been developed and meticulously evaluated in several animal models with the aim of analyzing the potential of interventions for neuronal repair and, consequently, boosting functional recovery. Although the majority of experimental research has been conducted in rodents, there is increasing recognition of the importance, and need, of evaluating the safety and efficacy of these interventions in non-human primates before moving to clinical trials involving therapies potentially promising in humans. This article is a literature review from databases (PubMed, Science Direct, Elsevier, Scielo, Redalyc, Cochrane, and NCBI) from 10 years ago to date, using keywords (spinal cord injury, cell therapy, non-human primates, humans, and bioengineering in spinal cord injury). From 110 retrieved articles, after two selection rounds based on inclusion and exclusion criteria, 21 articles were analyzed. Thus, this review arises from the need to recognize the experimental therapeutic advances applied in non-human primates and even humans, aimed at deepening these strategies and identifying the advantages and influence of the results on extrapolation for clinical applicability in humans.
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Affiliation(s)
- Ana Milena Silva Olaya
- PhD Program in Pathological Anatomy, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Ana Maria Blanco Martinez
- Graduate Program in Pathological Anatomy, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Suelen Adriani Marques
- Graduate Program in Pathological Anatomy (PPGAP/UFRJ), Department of Neurobiology/Institute of Biology, Campus do Gragoatá, Niterói, Rio de Janeiro, Brazil
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2
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Horrocks MS, Zhurenkov KE, Malmström J. Conducting polymer hydrogels for biomedical application: Current status and outstanding challenges. APL Bioeng 2024; 8:031503. [PMID: 39323539 PMCID: PMC11424142 DOI: 10.1063/5.0218251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Accepted: 09/06/2024] [Indexed: 09/27/2024] Open
Abstract
Conducting polymer hydrogels (CPHs) are composite polymeric materials with unique properties that combine the electrical capabilities of conducting polymers (CPs) with the excellent mechanical properties and biocompatibility of traditional hydrogels. This review aims to highlight how the unique properties CPHs have from combining their two constituent materials are utilized within the biomedical field. First, the synthesis approaches and applications of non-CPH conductive hydrogels are discussed briefly, contrasting CPH-based systems. The synthesis routes of hydrogels, CPs, and CPHs are then discussed. This review also provides a comprehensive overview of the recent advancements and applications of CPHs in the biomedical field, encompassing their applications as biosensors, drug delivery scaffolds (DDSs), and tissue engineering platforms. Regarding their applications within tissue engineering, a comprehensive discussion of the usage of CPHs for skeletal muscle prosthetics and regeneration, cardiac regeneration, epithelial regeneration and wound healing, bone and cartilage regeneration, and neural prosthetics and regeneration is provided. Finally, critical challenges and future perspectives are also addressed, emphasizing the need for continued research; however, this fascinating class of materials holds promise within the vastly evolving field of biomedicine.
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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] [MESH Headings] [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.
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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.
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Zhao H, Xiong T, Chu Y, Hao W, Zhao T, Sun X, Zhuang Y, Chen B, Zhao Y, Wang J, Chen Y, Dai J. Biomimetic Dual-Network Collagen Fibers with Porous and Mechanical Cues Reconstruct Neural Stem Cell Niche via AKT/YAP Mechanotransduction after Spinal Cord Injury. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2311456. [PMID: 38497893 DOI: 10.1002/smll.202311456] [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: 12/08/2023] [Revised: 02/21/2024] [Indexed: 03/19/2024]
Abstract
Tissue engineering scaffolds can mediate the maneuverability of neural stem cell (NSC) niche to influence NSC behavior, such as cell self-renewal, proliferation, and differentiation direction, showing the promising application in spinal cord injury (SCI) repair. Here, dual-network porous collagen fibers (PCFS) are developed as neurogenesis scaffolds by employing biomimetic plasma ammonia oxidase catalysis and conventional amidation cross-linking. Following optimizing the mechanical parameters of PCFS, the well-matched Young's modulus and physiological dynamic adaptability of PCFS (4.0 wt%) have been identified as a neurogenetic exciter after SCI. Remarkably, porous topographies and curving wall-like protrusions are generated on the surface of PCFS by simple and non-toxic CO2 bubble-water replacement. As expected, PCFS with porous and matched mechanical properties can considerably activate the cadherin receptor of NSCs and induce a series of serine-threonine kinase/yes-associated protein mechanotransduction signal pathways, encouraging cellular orientation, neuron differentiation, and adhesion. In SCI rats, implanted PCFS with matched mechanical properties further integrated into the injured spinal cords, inhibited the inflammatory progression and decreased glial and fibrous scar formation. Wall-like protrusions of PCFS drive multiple neuron subtypes formation and even functional neural circuits, suggesting a viable therapeutic strategy for nerve regeneration and functional recovery after SCI.
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Affiliation(s)
- Haitao Zhao
- School of Biomedical Sciences and Engineering, South China University of Technology, Guangzhou International Campus, Guangzhou, 511442, China
- Key Laboratory for Nano-Bio Interface Research, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences, Suzhou, 215123, China
| | - Tiandi Xiong
- Key Laboratory for Nano-Bio Interface Research, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences, Suzhou, 215123, China
- School of Nano Technology and Nano Bionics, University of Science and Technology of China, Hefei, 230026, China
| | - Yun Chu
- Key Laboratory for Nano-Bio Interface Research, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences, Suzhou, 215123, China
- School of Nano Technology and Nano Bionics, University of Science and Technology of China, Hefei, 230026, China
| | - Wangping Hao
- Key Laboratory for Nano-Bio Interface Research, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences, Suzhou, 215123, China
| | - Tongtong Zhao
- Key Laboratory for Nano-Bio Interface Research, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences, Suzhou, 215123, China
- School of Nano Technology and Nano Bionics, University of Science and Technology of China, Hefei, 230026, China
| | - Xinyue Sun
- Key Laboratory for Nano-Bio Interface Research, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences, Suzhou, 215123, China
- School of Nano Technology and Nano Bionics, University of Science and Technology of China, Hefei, 230026, China
| | - Yan Zhuang
- Key Laboratory for Nano-Bio Interface Research, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences, Suzhou, 215123, China
- School of Nano Technology and Nano Bionics, University of Science and Technology of China, Hefei, 230026, China
| | - Bing Chen
- State Key Laboratory of Molecular Development Biology, Institute of Genetics and Developmental Biology Chinese Academy of Sciences, Beijing, 100101, China
| | - Yannan Zhao
- State Key Laboratory of Molecular Development Biology, Institute of Genetics and Developmental Biology Chinese Academy of Sciences, Beijing, 100101, China
| | - Jun Wang
- School of Biomedical Sciences and Engineering, South China University of Technology, Guangzhou International Campus, Guangzhou, 511442, China
| | - Yanyan Chen
- Key Laboratory for Nano-Bio Interface Research, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences, Suzhou, 215123, China
- School of Nano Technology and Nano Bionics, University of Science and Technology of China, Hefei, 230026, China
| | - Jianwu Dai
- Key Laboratory for Nano-Bio Interface Research, Division of Nanobiomedicine, Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences, Suzhou, 215123, China
- School of Nano Technology and Nano Bionics, University of Science and Technology of China, Hefei, 230026, China
- State Key Laboratory of Molecular Development Biology, Institute of Genetics and Developmental Biology Chinese Academy of Sciences, Beijing, 100101, China
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Gao Y, Wang Y, Wu Y, Liu S. Biomaterials targeting the microenvironment for spinal cord injury repair: progression and perspectives. Front Cell Neurosci 2024; 18:1362494. [PMID: 38784712 PMCID: PMC11111957 DOI: 10.3389/fncel.2024.1362494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Accepted: 04/17/2024] [Indexed: 05/25/2024] Open
Abstract
Spinal cord injury (SCI) disrupts nerve pathways and affects sensory, motor, and autonomic function. There is currently no effective treatment for SCI. SCI occurs within three temporal periods: acute, subacute, and chronic. In each period there are different alterations in the cells, inflammatory factors, and signaling pathways within the spinal cord. Many biomaterials have been investigated in the treatment of SCI, including hydrogels and fiber scaffolds, and some progress has been made in the treatment of SCI using multiple materials. However, there are limitations when using individual biomaterials in SCI treatment, and these limitations can be significantly improved by combining treatments with stem cells. In order to better understand SCI and to investigate new strategies for its treatment, several combination therapies that include materials combined with cells, drugs, cytokines, etc. are summarized in the current review.
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Affiliation(s)
- Yating Gao
- Department of Neurosurgery, Tianyou Hospital, Wuhan University of Science and Technology, Wuhan, China
| | - Yu Wang
- Department of Neurosurgery, Tianyou Hospital, Wuhan University of Science and Technology, Wuhan, China
- Department of Neurosurgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yaqi Wu
- Department of Neurosurgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shengwen Liu
- Department of Neurosurgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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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.
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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.
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Ozcicek I, Aysit N, Balcikanli Z, Ayturk NU, Aydeger A, Baydas G, Aydin MS, Altintas E, Erim UC. Development of BDNF/NGF/IKVAV Peptide Modified and Gold Nanoparticle Conductive PCL/PLGA Nerve Guidance Conduit for Regeneration of the Rat Spinal Cord Injury. Macromol Biosci 2024; 24:e2300453. [PMID: 38224015 DOI: 10.1002/mabi.202300453] [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: 10/04/2023] [Revised: 12/22/2023] [Indexed: 01/16/2024]
Abstract
Spinal cord injuries are very common worldwide, leading to permanent nerve function loss with devastating effects in the affected patients. The challenges and inadequate results in the current clinical treatments are leading scientists to innovative neural regenerative research. Advances in nanoscience and neural tissue engineering have opened new avenues for spinal cord injury (SCI) treatment. In order for designed nerve guidance conduit (NGC) to be functionally useful, it must have ideal scaffold properties and topographic features that promote the linear orientation of damaged axons. In this study, it is aimed to develop channeled polycaprolactone (PCL)/Poly-D,L-lactic-co-glycolic acid (PLGA) hybrid film scaffolds, modify their surfaces by IKVAV pentapeptide/gold nanoparticles (AuNPs) or polypyrrole (PPy) and investigate the behavior of motor neurons on the designed scaffold surfaces in vitro under static/bioreactor conditions. Their potential to promote neural regeneration after implantation into the rat SCI by shaping the film scaffolds modified with neural factors into a tubular form is also examined. It is shown that channeled groups decorated with AuNPs highly promote neurite orientation under bioreactor conditions and also the developed optimal NGC (PCL/PLGA G1-IKVAV/BDNF/NGF-AuNP50) highly regenerates SCI. The results indicate that the designed scaffold can be an ideal candidate for spinal cord regeneration.
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Affiliation(s)
- Ilyas Ozcicek
- Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, 34810, Turkey
- Department of Medical Biology, School of Medicine, Istanbul Medipol University, Istanbul, 34815, Turkey
| | - Nese Aysit
- Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, 34810, Turkey
- Department of Medical Biology, School of Medicine, Istanbul Medipol University, Istanbul, 34815, Turkey
| | - Zeynep Balcikanli
- Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, 34810, Turkey
| | - Nilufer Ulas Ayturk
- Department of Histology and Embryology, Faculty of Medicine, Çanakkale Onsekiz Mart University, Canakkale, 17020, Turkey
| | - Asel Aydeger
- Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, 34810, Turkey
- Graduate School of Health Sciences, Istanbul Medipol University, Istanbul, 34815, Turkey
| | - Gulsena Baydas
- Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, 34810, Turkey
- Graduate School of Health Sciences, Istanbul Medipol University, Istanbul, 34815, Turkey
- Department of Physiology, School of Medicine, Istanbul Medipol University, Istanbul, 34815, Turkey
| | - Mehmet Serif Aydin
- Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, 34810, Turkey
| | - Esra Altintas
- Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, 34810, Turkey
- Graduate School of Health Sciences, Istanbul Medipol University, Istanbul, 34815, Turkey
| | - Umit Can Erim
- Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, 34810, Turkey
- Department of Analytical Chemistry, School of Pharmacy, Istanbul Medipol University, Istanbul, 34815, Turkey
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Jiu J, Liu H, Li D, Li J, Liu L, Yang W, Yan L, Li S, Zhang J, Li X, Li JJ, Wang B. 3D bioprinting approaches for spinal cord injury repair. Biofabrication 2024; 16:032003. [PMID: 38569491 DOI: 10.1088/1758-5090/ad3a13] [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: 10/10/2023] [Accepted: 04/03/2024] [Indexed: 04/05/2024]
Abstract
Regenerative healing of spinal cord injury (SCI) poses an ongoing medical challenge by causing persistent neurological impairment and a significant socioeconomic burden. The complexity of spinal cord tissue presents hurdles to successful regeneration following injury, due to the difficulty of forming a biomimetic structure that faithfully replicates native tissue using conventional tissue engineering scaffolds. 3D bioprinting is a rapidly evolving technology with unmatched potential to create 3D biological tissues with complicated and hierarchical structure and composition. With the addition of biological additives such as cells and biomolecules, 3D bioprinting can fabricate preclinical implants, tissue or organ-like constructs, andin vitromodels through precise control over the deposition of biomaterials and other building blocks. This review highlights the characteristics and advantages of 3D bioprinting for scaffold fabrication to enable SCI repair, including bottom-up manufacturing, mechanical customization, and spatial heterogeneity. This review also critically discusses the impact of various fabrication parameters on the efficacy of spinal cord repair using 3D bioprinted scaffolds, including the choice of printing method, scaffold shape, biomaterials, and biological supplements such as cells and growth factors. High-quality preclinical studies are required to accelerate the translation of 3D bioprinting into clinical practice for spinal cord repair. Meanwhile, other technological advances will continue to improve the regenerative capability of bioprinted scaffolds, such as the incorporation of nanoscale biological particles and the development of 4D printing.
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Affiliation(s)
- Jingwei Jiu
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, People's Republic of China
- Department of Orthopaedic Surgery, Shanxi Medical University Second Affiliated Hospital, Taiyuan, People's Republic of China
| | - Haifeng Liu
- Department of Orthopaedic Surgery, Shanxi Medical University Second Affiliated Hospital, Taiyuan, People's Republic of China
| | - Dijun Li
- Department of Orthopaedic Surgery, Shanxi Medical University Second Affiliated Hospital, Taiyuan, People's Republic of China
| | - Jiarong Li
- School of Biomedical Engineering, Faculty of Engineering and IT, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Lu Liu
- School of Biomedical Engineering, Faculty of Engineering and IT, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Wenjie Yang
- School of Biomedical Engineering, Faculty of Engineering and IT, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Lei Yan
- Department of Orthopaedic Surgery, Shanxi Medical University Second Affiliated Hospital, Taiyuan, People's Republic of China
| | - Songyan Li
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, People's Republic of China
| | - Jing Zhang
- Department of Emergency Surgery, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou 550001, People's Republic of China
| | - Xiaoke Li
- Department of Orthopaedic Surgery, Shanxi Medical University Second Affiliated Hospital, Taiyuan, People's Republic of China
| | - Jiao Jiao Li
- School of Biomedical Engineering, Faculty of Engineering and IT, University of Technology Sydney, Ultimo, NSW 2007, Australia
| | - Bin Wang
- Department of Orthopaedic Surgery, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, People's Republic of China
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Qiu R, Cai K, Zhang K, Ying Y, Hu H, Jiang G, Luo K. The current status and development trend of hydrogel application in spinal surgery. J Mater Chem B 2024; 12:1730-1747. [PMID: 38294330 DOI: 10.1039/d3tb02613b] [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: 02/01/2024]
Abstract
Spinal diseases often result in compromised mobility and diminished quality of life due to the intricate anatomy surrounding the nervous system. Medication and surgical interventions remain the primary treatment methods for spinal conditions. However, currently available medications have limited efficacy in treating spinal surgical diseases and cannot achieve a complete cure. Furthermore, surgical intervention frequently results in inevitable alterations and impairments to the initial anatomical integrity of the spinal structure, accompanied by the consequential loss of certain physiological functionalities. Changes in spine surgery treatment concepts and modalities in the last decade have led to a deepening of minimally invasive treatment, with treatment strategies focusing more on repairing and reconstructing the patient's spine and preserving physiological functions. Therefore, developing novel and more efficient treatment strategies to reduce spinal lesions and iatrogenic injuries is essential. In recent years, significant advancements in biomedical research have led to the discovery that hydrogels possess excellent biocompatibility, biodegradability, and adjustable mechanical properties. The application of hydrogel-based biotechnology in spinal surgery has demonstrated remarkable therapeutic potential. This review presents the therapeutic strategies for spinal diseases based on hydrogel tissue engineering technology.
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Affiliation(s)
- Rongzhang Qiu
- Health Science Center, Ningbo University, Ningbo, Zhejiang, 315000, China
| | - Kaiwen Cai
- Department of Orthopaedics, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang, 315000, China.
| | - Kai Zhang
- Department of Orthopaedics, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang, 315000, China.
| | - Yijian Ying
- Health Science Center, Ningbo University, Ningbo, Zhejiang, 315000, China
| | - Hangtian Hu
- Health Science Center, Ningbo University, Ningbo, Zhejiang, 315000, China
| | - Guoqiang Jiang
- Department of Orthopaedics, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang, 315000, China.
| | - Kefeng Luo
- Department of Orthopaedics, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang, 315000, China.
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10
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Yang HB, Li Y, Li XH, Yan QM, Han XZ, Cao J, Sang HP, Li JL. The compensatory increase of Gli-similar 3 inhibited neuronal apoptosis through regulating Mps one binder kinase activator 1b (MOB1b): a possible strategy for the functional recovery after spinal cord injury. Exp Anim 2024; 73:61-72. [PMID: 37574269 PMCID: PMC10877155 DOI: 10.1538/expanim.23-0041] [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: 03/16/2023] [Accepted: 08/02/2023] [Indexed: 08/15/2023] Open
Abstract
Spinal cord injury (SCI) is a devastating disease characterized by neuronal apoptosis. Gli-similar 3 (GLIS3), a transcriptional factor, was involved in cell apoptosis and associated with the transcription of downstream target genes related to neuronal function. However, the function of GLIS3 in SCI remains unknown. Therefore, we used the mouse model of SCI to explore the role of GLIS3 in SCI. The results showed that GLIS3 expression was significantly increased in spinal cord tissues of SCI mice, and GLIS3 overexpression promoted the functional recovery, reserved histological changes, and inhibited neuronal apoptosis after SCI. Through online tools, the potential target genes of GLIS3 were analyzed and we found that Mps one binder kinase activator 1b (Mob1b) had a strong association with SCI among these genes. MOB1b is a core component of Hippo signaling pathway, which was reported to inhibit cell apoptosis. MOB1b expression was significantly increased in mice at 7 days post-SCI and GLIS3 overexpression further increased its expression. Dual-luciferase reporter assay revealed that GLIS3 bound to the promoter of Mob1b and promoted its transcription. In conclusion, our findings reveal that the compensatory increase of GLIS3 promotes functional recovery after SCI through inhibiting neuronal apoptosis by transcriptionally regulating MOB1b. Our study provides a novel target for functional recovery after SCI.
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Affiliation(s)
- Hong-Bo Yang
- Department of Orthopedics, Affiliated Hospital of Chifeng University, No. 42 Wangfu Street, Songshan District, Chifeng, Inner Mongolia, 024000, P.R. China
- Institute of Orthopedic Diseases, Chifeng University, No.1 Yingbin Road, Hongshan District, Chifeng, 024000, P.R. China
| | - Ying Li
- Department of Neurology, Affiliated Hospital of Chifeng University, No. 42 Wangfu Street, Songshan District, Chifeng, 024000, P.R. China
| | - Xiu-Hai Li
- Department of Orthopedics, Affiliated Hospital of Chifeng University, No. 42 Wangfu Street, Songshan District, Chifeng, Inner Mongolia, 024000, P.R. China
| | - Qing-Ming Yan
- Department of Orthopedics, Affiliated Hospital of Chifeng University, No. 42 Wangfu Street, Songshan District, Chifeng, Inner Mongolia, 024000, P.R. China
| | - Xian-Zhang Han
- Department of Orthopedics, Affiliated Hospital of Chifeng University, No. 42 Wangfu Street, Songshan District, Chifeng, Inner Mongolia, 024000, P.R. China
| | - Jian Cao
- Department of Orthopedics, Affiliated Hospital of Chifeng University, No. 42 Wangfu Street, Songshan District, Chifeng, Inner Mongolia, 024000, P.R. China
- Institute of Orthopedic Diseases, Chifeng University, No.1 Yingbin Road, Hongshan District, Chifeng, 024000, P.R. China
| | - Hong-Peng Sang
- Department of Orthopedics, Affiliated Hospital of Chifeng University, No. 42 Wangfu Street, Songshan District, Chifeng, Inner Mongolia, 024000, P.R. China
- Institute of Orthopedic Diseases, Chifeng University, No.1 Yingbin Road, Hongshan District, Chifeng, 024000, P.R. China
| | - Jin-Long Li
- Department of Orthopedics, Affiliated Hospital of Chifeng University, No. 42 Wangfu Street, Songshan District, Chifeng, Inner Mongolia, 024000, P.R. China
- Institute of Orthopedic Diseases, Chifeng University, No.1 Yingbin Road, Hongshan District, Chifeng, 024000, P.R. China
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11
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Xu B, Zhang D, Yang B, Chen X, Jin Z, Qin X, Ma G, Sun K, Zhu L, Wei X, Yin H. Emerging trends in the blood spinal-cord barrier: A bibliometric analysis. Medicine (Baltimore) 2024; 103:e37125. [PMID: 38306548 PMCID: PMC10843562 DOI: 10.1097/md.0000000000037125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 01/10/2024] [Indexed: 02/04/2024] Open
Abstract
BACKGROUND The blood-spinal cord barrier (BSCB) is a unique protective barrier located between the circulatory system and the central nervous system. BSCB plays a vital role in various diseases. However, there is little systematic research and recording in this field by bibliometrics analysis. We aim to visualize this field through bibliometrics to analyze the hotspots and trends of BSCB and in order to facilitate an understanding of future developments in basic and clinical research. METHODS To conduct a bibliometric study of original publications and their references, the keywords Blood Spinal-Cord Barrier and BSCB are searched and filtered from the Web of Science database (2000-2022), focusing on citations, authors, journals, and countries/regions. Additionally, clustering of the references and co-citation analysis was completed, including a total of 1926 articles and comments. RESULTS From the results, 193 authors were identified, among which Sharma Hs played a key role. As far as the analysis result of the clustering of the references is concerned, the most common type in cluster analysis is spinal cord injury (SCI) which is a current and developing research field. The keywords are also the specific content under these clusters. The most influential organization is Univ Calif San Francisco, and "Proceedings of The National Academy of Sciences of The United States of America" magazine is the most cited magazine. CONCLUSION SUBSECTIONS The research on BSCB is booming focusing mainly on "BSCB in SCI" including "activation," "pathway," and "drug delivery" which is also the trend of future research.
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Affiliation(s)
- Bo Xu
- Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Dian Zhang
- Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- Graduate School, Beijing University of Chinese Medicine, Beijing, China
| | - Bowen Yang
- Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Xin Chen
- Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Zhefeng Jin
- Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Xiaokuan Qin
- Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Guoliang Ma
- Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Kai Sun
- Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Liguo Zhu
- Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- Beijing Key Laboratory of Bone Setting Technology of Traditional Chinese Medicine, Beijing, China
| | - Xu Wei
- Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - He Yin
- Wangjing Hospital, China Academy of Chinese Medical Sciences, Beijing, China
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12
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Xu F, Tian Z, Wang Z. Cilostazol protects against degenerative cervical myelopathy injury and cell pyroptosis via TXNIP-NLRP3 pathway. Cell Div 2024; 19:2. [PMID: 38233884 DOI: 10.1186/s13008-024-00108-y] [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: 11/19/2023] [Accepted: 01/11/2024] [Indexed: 01/19/2024] Open
Abstract
Degenerative cervical myelopathy (DCM) is one of the most common and serious neurological diseases. Cilostazol has protective effects of anterior horn motor neurons and prevented the cell apoptosis. However, there was no literatures of Cilostazol on DCM. In this study, we established the DCM rat model to detect the effects of Cilostazol. Meanwhile, the neurobehavioral assessments, histopathology changes, inflammatory cytokines, Thioredoxin-interacting protein (TXNIP), NOD‑like receptor pyrin domain containing 3 (NLRP3) and pro-caspase-1 expressions were detected by Basso, Beattie, and Bresnahan score assessment, Hematoxylin and Eosin Staining, Enzyme-linked immunosorbent assay, immunofluorescence and Western blotting, respectively. After treated with Cilostazol, the Basso, Beattie, and Bresnahan (BBB) score, inclined plane test and forelimb grip strength in DCM rats were significantly increased meanwhile the histopathology injury and inflammatory cytokines were decreased. Additionally, TXNIP, NLRP3 and pro-caspase-1 expressions levels were decreased in Cilostazol treated DCM rats. Interestingly, the using of siTXNIP significantly changed inflammatory cytokines, TXNIP, NLRP3 and pro-caspase-1 expressions, however there was no significance between siTXNIP and Cilostazol + siTXNIP group. These observations showed that Cilostazol rescues DCM injury and ameliorates neuronal destruction mediated by TXNIP/NLRP3/caspase-1 and pro-inflammatory cytokines. As a result of our study, these findings provide further evidence that Cilostazol may represent promising therapeutic candidates for DCM.
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Affiliation(s)
- Fei Xu
- Department of Neck-Shoulder and Lumbocrural Pain, Yantai hospital of traditional Chinese medicine, 39 Xingfu Road, Zhifu District, Yantai, 264000, Shandong, P.R. China
| | - Zhuo Tian
- Department of General Surgery, Yantai hospital of traditional Chinese medicine, Yantai, Shandong, China
| | - Zhengguang Wang
- Department of Neck-Shoulder and Lumbocrural Pain, Yantai hospital of traditional Chinese medicine, 39 Xingfu Road, Zhifu District, Yantai, 264000, Shandong, P.R. China.
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13
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Lee HY, Moon SH, Kang D, Choi E, Yang GH, Kim KN, Won JY, Yi S. A multi-channel collagen conduit with aligned Schwann cells and endothelial cells for enhanced neuronal regeneration in spinal cord injury. Biomater Sci 2023; 11:7884-7896. [PMID: 37906468 DOI: 10.1039/d3bm01152f] [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: 11/02/2023]
Abstract
Traumatic spinal cord injury (SCI) leads to Wallerian degeneration and the accompanying disruption of vasculature leads to ischemia, which damages motor and sensory function. Therefore, understanding the biological environment during regeneration is essential to promote neuronal regeneration and overcome this phenomenon. The band of Büngner is a structure of an aligned Schwann cell (SC) band that guides axon elongation providing a natural recovery environment. During axon elongation, SCs promote axon elongation while migrating along neovessels (endothelial cells [ECs]). To model this, we used extrusion 3D bioprinting to develop a multi-channel conduit (MCC) using collagen for the matrix region and sacrificial alginate to make the channel. The MCC was fabricated with a structure in which SCs and ECs were longitudinally aligned to mimic the sophisticated recovering SCI conditions. Also, we produced an MCC with different numbers of channels. The aligned SCs and ECs in the 9-channel conduit (9MCC-SE) were more biocompatible and led to more proliferation than the 5-channel conduit (5MCC-SE) in vitro. Also, the 9MCC-SE resulted in a greater healing effect than the 5MCC-SE with respect to neuronal regeneration, remyelination, inflammation, and angiogenesis in vivo. The above tissue recovery results led to motor function repair. Our results show that our 9MCC-SE model represents a new therapeutic strategy for SCI.
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Affiliation(s)
- Hye Yeong Lee
- Spine & Spinal Cord Institute, Department of Neurosurgery, College of Medicine, Yonsei University, 134 Sinchon-dong, Seodaemun-gu, Seoul 03722, Republic of Korea.
| | - Seo Hyun Moon
- Spine & Spinal Cord Institute, Department of Neurosurgery, College of Medicine, Yonsei University, 134 Sinchon-dong, Seodaemun-gu, Seoul 03722, Republic of Korea.
| | - Donggu Kang
- Research Institute of Additive Manufacturing and Regenerative Medicine, Baobab Healthcare Inc., 55 Hanyangdaehak-Ro, Ansan, Gyeonggi-Do, 15588, South Korea
| | - Eunjeong Choi
- Research Institute of Additive Manufacturing and Regenerative Medicine, Baobab Healthcare Inc., 55 Hanyangdaehak-Ro, Ansan, Gyeonggi-Do, 15588, South Korea
| | - Gi Hoon Yang
- Research Institute of Additive Manufacturing and Regenerative Medicine, Baobab Healthcare Inc., 55 Hanyangdaehak-Ro, Ansan, Gyeonggi-Do, 15588, South Korea
| | - Keung Nyun Kim
- Spine & Spinal Cord Institute, Department of Neurosurgery, College of Medicine, Yonsei University, 134 Sinchon-dong, Seodaemun-gu, Seoul 03722, Republic of Korea.
| | - Joo Yun Won
- Clinical & Translational Research Institute, Anymedi INC., Seoul, South Korea
| | - Seong Yi
- Spine & Spinal Cord Institute, Department of Neurosurgery, College of Medicine, Yonsei University, 134 Sinchon-dong, Seodaemun-gu, Seoul 03722, Republic of Korea.
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14
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Yuan T, Wang T, Zhang J, Liu P, Xu J, Gu Z, Xu J, Li Y. Robust and Multifunctional Nanoparticles Assembled from Natural Polyphenols and Metformin for Efficient Spinal Cord Regeneration. ACS NANO 2023; 17:18562-18575. [PMID: 37708443 DOI: 10.1021/acsnano.3c06991] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
The treatment of spinal cord injury (SCI) remains unsatisfactory owing to the complex pathophysiological microenvironments at the injury site and the limited regenerative potential of the central nervous system. Metformin has been proven in clinical and animal experiments to repair damaged structures and functions by promoting endogenous neurogenesis. However, in the early stage of acute SCI, the adverse pathophysiological microenvironment of the injury sites, such as reactive oxygen species and inflammatory factor storm, can prevent the activation of endogenous neural stem cells (NSCs) and the differentiation of NSCs into neurons, decreasing the whole repair effect. To address those issues, a series of robust and multifunctional natural polyphenol-metformin nanoparticles (polyphenol-Met NPs) were fabricated with pH-responsiveness and excellent antioxidative capacities. The resulting NPs possessed several favorable advantages: First, the NPs were composed of active ingredients with different biological properties, without the need for carriers; second, the pH-responsiveness feature could allow targeted drug delivery at the injured site; more importantly, NPs enabled drugs with different performances to exhibit strong synergistic effects. The results demonstrated that the improved microenvironment by natural polyphenols boosted the differentiation of activated NSCs into neurons and oligodendrocytes, which could efficiently repair the injured nerve structures and enhance the functional recovery of the SCI rats. This work highlighted the design and fabrication of robust and multifunctional NPs for SCI treatment via efficient microenvironmental regulation and targeted NSCs activation.
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Affiliation(s)
- Taoyang Yuan
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Tianyou Wang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Jianhua Zhang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Pengyu Liu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Jiayi Xu
- Core Facilities, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
| | - Zhipeng Gu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Jianguo Xu
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Yiwen Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
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15
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Hey G, Willman M, Patel A, Goutnik M, Willman J, Lucke-Wold B. Stem Cell Scaffolds for the Treatment of Spinal Cord Injury-A Review. BIOMECHANICS (BASEL, SWITZERLAND) 2023; 3:322-342. [PMID: 37664542 PMCID: PMC10469078 DOI: 10.3390/biomechanics3030028] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
Spinal cord injury (SCI) is a profoundly debilitating yet common central nervous system condition resulting in significant morbidity and mortality rates. Major causes of SCI encompass traumatic incidences such as motor vehicle accidents, falls, and sports injuries. Present treatment strategies for SCI aim to improve and enhance neurologic functionality. The ability for neural stem cells (NSCs) to differentiate into diverse neural and glial cell precursors has stimulated the investigation of stem cell scaffolds as potential therapeutics for SCI. Various scaffolding modalities including composite materials, natural polymers, synthetic polymers, and hydrogels have been explored. However, most trials remain largely in the preclinical stage, emphasizing the need to further develop and refine these treatment strategies before clinical implementation. In this review, we delve into the physiological processes that underpin NSC differentiation, including substrates and signaling pathways required for axonal regrowth post-injury, and provide an overview of current and emerging stem cell scaffolding platforms for SCI.
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Affiliation(s)
- Grace Hey
- College of Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Matthew Willman
- College of Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Aashay Patel
- College of Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Michael Goutnik
- College of Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Jonathan Willman
- College of Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Brandon Lucke-Wold
- Department of Neurosurgery, University of Florida, Gainesville, FL 32611, USA
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16
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Li W, Wu Y, Zhang X, Wu T, Huang K, Wang B, Liao J. Self-healing hydrogels for bone defect repair. RSC Adv 2023; 13:16773-16788. [PMID: 37283866 PMCID: PMC10240173 DOI: 10.1039/d3ra01700a] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 05/24/2023] [Indexed: 06/08/2023] Open
Abstract
Severe bone defects can be caused by various factors, such as tumor resection, severe trauma, and infection. However, bone regeneration capacity is limited up to a critical-size defect, and further intervention is required. Currently, the most common clinical method to repair bone defects is bone grafting, where autografts are the "gold standard." However, the disadvantages of autografts, including inflammation, secondary trauma and chronic disease, limit their application. Bone tissue engineering (BTE) is an attractive strategy for repairing bone defects and has been widely researched. In particular, hydrogels with a three-dimensional network can be used as scaffolds for BTE owing to their hydrophilicity, biocompatibility, and large porosity. Self-healing hydrogels respond rapidly, autonomously, and repeatedly to induced damage and can maintain their original properties (i.e., mechanical properties, fluidity, and biocompatibility) following self-healing. This review focuses on self-healing hydrogels and their applications in bone defect repair. Moreover, we discussed the recent progress in this research field. Despite the significant existing research achievements, there are still challenges that need to be addressed to promote clinical research of self-healing hydrogels in bone defect repair and increase the market penetration.
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Affiliation(s)
- Weiwei Li
- State Key Laboratory of Oral Diseases, National Clinical Research Centre for Oral Diseases, West China Hospital of Stomatology, Sichuan University Chengdu 610041 China
| | - Yanting Wu
- State Key Laboratory of Oral Diseases, National Clinical Research Centre for Oral Diseases, West China Hospital of Stomatology, Sichuan University Chengdu 610041 China
| | - Xu Zhang
- State Key Laboratory of Oral Diseases, National Clinical Research Centre for Oral Diseases, West China Hospital of Stomatology, Sichuan University Chengdu 610041 China
| | - Tingkui Wu
- Department of Orthopedics, Orthopedic Research Institute, West China Hospital, Sichuan University Chengdu 610041 China
| | - Kangkang Huang
- Department of Orthopedics, Orthopedic Research Institute, West China Hospital, Sichuan University Chengdu 610041 China
| | - Beiyu Wang
- Department of Orthopedics, Orthopedic Research Institute, West China Hospital, Sichuan University Chengdu 610041 China
| | - Jinfeng Liao
- State Key Laboratory of Oral Diseases, National Clinical Research Centre for Oral Diseases, West China Hospital of Stomatology, Sichuan University Chengdu 610041 China
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17
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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.
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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
| | - 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
| | - Yunbing Wang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, 610064, China
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18
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Zidarič T, Skok K, Orthaber K, Pristovnik M, Gradišnik L, Maver T, Maver U. Multilayer Methacrylate-Based Wound Dressing as a Therapeutic Tool for Targeted Pain Relief. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2361. [PMID: 36984241 PMCID: PMC10053588 DOI: 10.3390/ma16062361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 03/12/2023] [Accepted: 03/13/2023] [Indexed: 06/18/2023]
Abstract
This study presents an innovative wound dressing system that offers a highly effective therapeutic solution for treating painful wounds. By incorporating the widely used non-steroidal anti-inflammatory drug diclofenac, we have created an active wound dressing that can provide targeted pain relief with ease. The drug was embedded within a biocompatible matrix composed of polyhydroxyethyl methacrylate and polyhydroxypropyl methacrylate. The multilayer structure of the dressing, which allows for sustained drug release and an exact application, was achieved through the layer-by-layer coating technique and the inclusion of superparamagnetic iron platinum nanoparticles. The multilayered dressings' physicochemical, structural, and morphological properties were characterised using various methods. The synergistic effect of the incorporated drug molecules and superparamagnetic nanoparticles on the surface roughness and release kinetics resulted in controlled drug release. In addition, the proposed multilayer wound dressings were found to be biocompatible with human skin fibroblasts. Our findings suggest that the developed wound dressing system can contribute to tailored therapeutic strategies for local pain relief.
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Affiliation(s)
- Tanja Zidarič
- Institute of Biomedical Sciences, Faculty of Medicine, University of Maribor, Taborska ulica 8, 2000 Maribor, Slovenia
| | - Kristijan Skok
- Institute of Biomedical Sciences, Faculty of Medicine, University of Maribor, Taborska ulica 8, 2000 Maribor, Slovenia
- Department of Pathology, Hospital Graz II, Location West, Göstinger Straße 22, 8020 Graz, Austria
| | - Kristjan Orthaber
- Institute of Biomedical Sciences, Faculty of Medicine, University of Maribor, Taborska ulica 8, 2000 Maribor, Slovenia
| | - Matevž Pristovnik
- Institute of Biomedical Sciences, Faculty of Medicine, University of Maribor, Taborska ulica 8, 2000 Maribor, Slovenia
| | - Lidija Gradišnik
- Institute of Biomedical Sciences, Faculty of Medicine, University of Maribor, Taborska ulica 8, 2000 Maribor, Slovenia
| | - Tina Maver
- Institute of Biomedical Sciences, Faculty of Medicine, University of Maribor, Taborska ulica 8, 2000 Maribor, Slovenia
- Department of Pharmacology, Faculty of Medicine, University of Maribor, Taborska ulica 8, 2000 Maribor, Slovenia
| | - Uroš Maver
- Institute of Biomedical Sciences, Faculty of Medicine, University of Maribor, Taborska ulica 8, 2000 Maribor, Slovenia
- Department of Pharmacology, Faculty of Medicine, University of Maribor, Taborska ulica 8, 2000 Maribor, Slovenia
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19
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Szymoniuk M, Mazurek M, Dryla A, Kamieniak P. The application of 3D-bioprinted scaffolds for neuronal regeneration after traumatic spinal cord injury - A systematic review of preclinical in vivo studies. Exp Neurol 2023; 363:114366. [PMID: 36858280 DOI: 10.1016/j.expneurol.2023.114366] [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: 01/05/2023] [Revised: 02/16/2023] [Accepted: 02/24/2023] [Indexed: 03/03/2023]
Abstract
BACKGROUND The implantation of 3D-bioprinted scaffolds represents a promising therapeutic approach for traumatic Spinal Cord Injury (SCI), currently investigating in preclinical in vivo studies. However, a systematic review of the relevant literature has not been performed to date. Hence, we systematically reviewed the outcomes of the application of 3D-bioprinted implants in the treatment of SCI based on studies conducted on experimental animal models. METHODS We searched PubMed, Scopus, Web of Science, and Cochrane Library databases. Manuscripts in other designs than in vivo preclinical study and written in other languages than English were excluded. A risk of bias assessment was performed using SYRCLE's tool. The quality of included articles was assessed by ARRIVE guidelines. Extracted data were synthesized only qualitatively because the data were not suitable for conducting the meta-analysis. RESULTS Overall, eleven animal studies reporting on the transection SCI rat model were included. Six of included studies investigated 3D-bioprinted scaffolds enriched with stem cells, two studies - 3D-bioprinted scaffolds combined with growth factors, and three studies - stand-alone 3D-bioprinted scaffolds. In all included studies the application of 3D-bioprinted scaffolds led to significant improvement in functional scores compared with no treated SCI rats. The functional recovery corresponded with the changes observed at the injury site in histological analyses. Seven studies demonstrated medium, three studies - high, and one study - low risk of bias. Moreover, some of the included studies were conducted in the same scientific center. The overall quality assessment ratio amounted to 0.60, which was considered average quality. CONCLUSION The results of our systematic review suggest that 3D-bioprinted scaffolds may be a feasible therapeutic approach for the treatment of SCI. Further evidence obtained on other experimental SCI models is necessary before the clinical translation of 3D-bioprinted scaffolds.
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Affiliation(s)
- Michał Szymoniuk
- Student Scientific Association at the Department of Neurosurgery and Pediatric Neurosurgery, Medical University of Lublin, Jaczewskiego 8, 20-090 Lublin, Poland.
| | - Marek Mazurek
- Department of Neurosurgery and Pediatric Neurosurgery, Medical University of Lublin, Jaczewskiego 8, 20-090 Lublin, Poland
| | - Aleksandra Dryla
- Student Scientific Association at the Department of Neurosurgery and Pediatric Neurosurgery, Medical University of Lublin, Jaczewskiego 8, 20-090 Lublin, Poland
| | - Piotr Kamieniak
- Department of Neurosurgery and Pediatric Neurosurgery, Medical University of Lublin, Jaczewskiego 8, 20-090 Lublin, Poland
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20
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Medvediev VV, Oleksenko NP, Pichkur LD, Verbovska SA, Savosko SI, Draguntsova NG, Lontkovskyi YA, Vaslovych VV, Tsymbalyuk VI. Implantation Effect of a Fibrin Matrix Associated with Mesenchymal Wharton’s Jelly Stromal Cells on the Course of an Experimental Spinal Cord Injury. CYTOL GENET+ 2023. [DOI: 10.3103/s0095452723010073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
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21
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Oligo (Poly (Ethylene Glycol) Fumarate)-Based Multicomponent Cryogels for Neural Tissue Replacement. Gels 2023; 9:gels9020105. [PMID: 36826275 PMCID: PMC9957547 DOI: 10.3390/gels9020105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 01/21/2023] [Accepted: 01/22/2023] [Indexed: 01/27/2023] Open
Abstract
Synthetic hydrogels provide a promising platform to produce neural tissue analogs with improved control over structural, physical, and chemical properties. In this study, oligo (poly (ethylene glycol) fumarate) (OPF)-based macroporous cryogels were developed as a potential next-generation alternative to a non-porous OPF hydrogel previously proposed as an advanced biodegradable scaffold for spinal cord repair. A series of OPF cryogel conduits in combination with PEG diacrylate and 2-(methacryloyloxy) ethyl-trimethylammonium chloride (MAETAC) cationic monomers were synthesized and characterized. The contribution of each component to viscoelastic and hydration behaviors and porous structure was identified, and concentration relationships for these properties were revealed. The rheological properties of the materials corresponded to those of neural tissues and scaffolds, according to the reviewed data. A comparative assessment of adhesion, migration, and proliferation of neuronal cells in multicomponent cryogels was carried out to optimize cell-supporting characteristics. The results show that OPF-based cryogels can be used as a tunable synthetic scaffold for neural tissue repair with advantages over their hydrogel counterparts.
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22
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Tang Y, Xu Z, Tang J, Xu Y, Li Z, Wang W, Wu L, Xi K, Gu Y, Chen L. Architecture-Engineered Electrospinning Cascade Regulates Spinal Microenvironment to Promote Nerve Regeneration. Adv Healthc Mater 2023; 12:e2202658. [PMID: 36652529 DOI: 10.1002/adhm.202202658] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 01/14/2023] [Indexed: 01/19/2023]
Abstract
The inflammatory cascade after spinal cord injury (SCI) causes necrotizing apoptosis of local stem cells, which limits nerve regeneration. Therefore, coordinating the inflammatory immune response and neural stem cell (NSC) functions is key to promoting the recovery of central nervous system function. In this study, a hydrogel "perfusion" system and electrospinning technology are integrated, and a "concrete" composite support for the repair of nerve injuries is built. The hydrogel's hydrophilic properties activate macrophage integrin receptors to mediate polarization into anti-inflammatory subtypes and cause a 10% increase in polarized M2 macrophages, thus reprogramming the SCI immune microenvironment. Programmed stromal cell-derived factor-1α and brain-derived neurotrophic factor released from the composite increase recruitment and neuronal differentiation of NSCs by approximately four- and twofold, respectively. The fiber system regulates the SCI immune inflammatory microenvironment, recruits endogenous NSCs, promotes local blood vessel germination and maturation, and improves nerve function recovery in a rat SCI model. In conclusion, the engineering fiber composite improves the local inflammatory response. It promotes nerve regeneration through a hydrophilic programmed cytokine-delivery system, which further improves and supplements the immune response mechanism regulated by the inherent properties of the biomaterial. The new fiber composite may serve as a new treatment approach for SCI.
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Affiliation(s)
- Yu Tang
- Department of Orthopedics, the First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, 188 Shizi Road, Suzhou, Jiangsu, 215006, P. R. China
| | - Zonghan Xu
- Department of Orthopedics, the First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, 188 Shizi Road, Suzhou, Jiangsu, 215006, P. R. China
| | - Jincheng Tang
- Department of Orthopedics, the First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, 188 Shizi Road, Suzhou, Jiangsu, 215006, P. R. China
| | - Yichang Xu
- Department of Orthopedics, the First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, 188 Shizi Road, Suzhou, Jiangsu, 215006, P. R. China
| | - Ziang Li
- Department of Orthopedics, the First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, 188 Shizi Road, Suzhou, Jiangsu, 215006, P. R. China
| | - Wenbo Wang
- Department of Orthopedics, the First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, 188 Shizi Road, Suzhou, Jiangsu, 215006, P. R. China
| | - Liang Wu
- Department of Orthopedics, the First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, 188 Shizi Road, Suzhou, Jiangsu, 215006, P. R. China
| | - Kun Xi
- Department of Orthopedics, the First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, 188 Shizi Road, Suzhou, Jiangsu, 215006, P. R. China
| | - Yong Gu
- Department of Orthopedics, the First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, 188 Shizi Road, Suzhou, Jiangsu, 215006, P. R. China
| | - Liang Chen
- Department of Orthopedics, the First Affiliated Hospital of Soochow University, Orthopedic Institute, Soochow University, 188 Shizi Road, Suzhou, Jiangsu, 215006, P. R. China
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23
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Rybachuk O, Savytska N, Pinet É, Yaminsky Y, Medvediev V. Heterogeneous pHPMA hydrogel promotes neuronal differentiation of bone marrow derived stromal cells in vitroand in vivo. Biomed Mater 2023; 18. [PMID: 36542861 DOI: 10.1088/1748-605x/acadc3] [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: 06/27/2022] [Accepted: 12/21/2022] [Indexed: 12/24/2022]
Abstract
Synthetic hydrogels composed of polymer pore frames are commonly used in medicine, from pharmacologically targeted drug delivery to the creation of bioengineering constructions used in implantation surgery. Among various possible materials, the most common are poly-[N(2-hydroxypropyl)methacrylamide] (pHPMA) derivatives. One of the pHPMA derivatives is biocompatible hydrogel, NeuroGel. Upon contact with nervous tissue, the NeuroGel's structure can support the chemical and physiological conditions of the tissue necessary for the growth of native cells. Owing to the different pore diameters in the hydrogel, not only macromolecules, but also cells can migrate. This study evaluated the differentiation of bone marrow stromal cells (BMSCs) into neurons, as well as the effectiveness of using this biofabricated system in spinal cord injuryin vivo. The hydrogel was populated with BMSCs by injection or rehydration. After cultivation, these fragments (hydrogel + BMSCs) were implanted into the injured rat spinal cord. Fragments were immunostained before implantation and seven months after implantation. During cultivation with the hydrogel, both variants (injection/rehydration) of the BMSCs culture retained their viability and demonstrated a significant number of Ki-67-positive cells, indicating the preservation of their proliferative activity. In hydrogel fragments, BMSCs also maintained their viability during the period of cocultivation and were Ki-67-positive, but in significantly fewer numbers than in the cell culture. In addition, in fragments of hydrogel with grafted BMSCs, both by the injection or rehydration versions, we observed a significant number up to 57%-63.5% of NeuN-positive cells. These results suggest that the heterogeneous pHPMA hydrogel promotes neuronal differentiation of bone marrow-derived stromal cells. Furthermore, these data demonstrate the possible use of NeuroGel implants with grafted BMSCs for implantation into damaged areas of the spinal cord, with subsequent nerve fiber germination, nerve cell regeneration, and damaged segment restoration.
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Affiliation(s)
- Oksana Rybachuk
- Bogomoletz Institute of Physiology NAS of Ukraine, Kyiv, Ukraine.,Institute of Genetic and Regenerative Medicine, M. D. Strazhesko National Scientific Center of Cardiology, Clinical and Regenerative Medicine, NAMS of Ukraine, Kyiv, Ukraine
| | - Natalia Savytska
- Bogomoletz Institute of Physiology NAS of Ukraine, Kyiv, Ukraine.,German Center for Neurodegenerative Diseases, Tübingen, Germany
| | | | - Yurii Yaminsky
- State Institution 'Romodanov Neurosurgery Institute, NAMS of Ukraine', Kyiv, Ukraine
| | - Volodymyr Medvediev
- Bogomoletz Institute of Physiology NAS of Ukraine, Kyiv, Ukraine.,Bogomolets National Medical University, Kyiv, Ukraine
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24
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Wang M, Xu P, Lei B. Engineering multifunctional bioactive citrate-based biomaterials for tissue engineering. Bioact Mater 2023; 19:511-537. [PMID: 35600971 PMCID: PMC9096270 DOI: 10.1016/j.bioactmat.2022.04.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 04/22/2022] [Accepted: 04/24/2022] [Indexed: 12/21/2022] Open
Abstract
Developing bioactive biomaterials with highly controlled functions is crucial to enhancing their applications in regenerative medicine. Citrate-based polymers are the few bioactive polymer biomaterials used in biomedicine because of their facile synthesis, controllable structure, biocompatibility, biomimetic viscoelastic mechanical behavior, and functional groups available for modification. In recent years, various multifunctional designs and biomedical applications, including cardiovascular, orthopedic, muscle tissue, skin tissue, nerve and spinal cord, bioimaging, and drug or gene delivery based on citrate-based polymers, have been extensively studied, and many of them have good clinical application potential. In this review, we summarize recent progress in the multifunctional design and biomedical applications of citrate-based polymers. We also discuss the further development of multifunctional citrate-based polymers with tailored properties to meet the requirements of various biomedical applications. Multifunctional bioactive citrate-based biomaterials have broad applications in regenerative medicine. Recent advances in multifunctional design and biomedical applications of citate-based polymers are summarized. Future challenge of citrate-based polymers in various biomedical applications are discussed.
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25
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Gong W, Zhang T, Che M, Wang Y, He C, Liu L, Lv Z, Xiao C, Wang H, Zhang S. Recent advances in nanomaterials for the treatment of spinal cord injury. Mater Today Bio 2022; 18:100524. [PMID: 36619202 PMCID: PMC9813796 DOI: 10.1016/j.mtbio.2022.100524] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 12/06/2022] [Accepted: 12/16/2022] [Indexed: 12/23/2022] Open
Abstract
Spinal cord injuries (SCIs) are devastating. In SCIs, a powerful traumatic force impacting the spinal cord results in the permanent loss of nerve function below the injury level, leaving the patient paralyzed and wheelchair-bound for the remainder of his/her life. Unfortunately, clinical treatment that depends on surgical decompression appears to be unable to handle damaged nerves, and high-dose methylprednisolone-based therapy is also associated with problems, such as infection, gastrointestinal bleeding, femoral head necrosis, obesity, and hyperglycemia. Nanomaterials have opened new avenues for SCI treatment. Among them, performance-based nanomaterials derived from a variety of materials facilitate improvements in the microenvironment of traumatic injury and, in some cases, promote neuron regeneration. Nanoparticulate drug delivery systems enable the optimization of drug effects and drug bioavailability, thus contributing to the development of novel treatments. The improved efficiency and accuracy of gene delivery will also benefit the exploration of SCI mechanisms and the understanding of key genes and signaling pathways. Herein, we reviewed different types of nanomaterials applied to the treatment of SCI and summarized their functions and advantages to provide new perspectives for future clinical therapies.
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Affiliation(s)
- Weiquan Gong
- Department of Spine Surgery, Orthopedics Center, First Hospital of Jilin University, No. 1 Xinmin Street, Changchun, 130021, China,Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China,Jilin Engineering Research Center for Spine and Spinal Cord Injury, China
| | - Tianhui Zhang
- Department of Spine Surgery, Orthopedics Center, First Hospital of Jilin University, No. 1 Xinmin Street, Changchun, 130021, China,Jilin Engineering Research Center for Spine and Spinal Cord Injury, China
| | - Mingxue Che
- Department of Spine Surgery, Orthopedics Center, First Hospital of Jilin University, No. 1 Xinmin Street, Changchun, 130021, China,Jilin Engineering Research Center for Spine and Spinal Cord Injury, China
| | - Yongjie Wang
- Department of Spine Surgery, Orthopedics Center, First Hospital of Jilin University, No. 1 Xinmin Street, Changchun, 130021, China,Jilin Engineering Research Center for Spine and Spinal Cord Injury, China
| | - Chuanyu He
- Department of Spine Surgery, Orthopedics Center, First Hospital of Jilin University, No. 1 Xinmin Street, Changchun, 130021, China,Jilin Engineering Research Center for Spine and Spinal Cord Injury, China
| | - Lidi Liu
- Department of Spine Surgery, Orthopedics Center, First Hospital of Jilin University, No. 1 Xinmin Street, Changchun, 130021, China,Jilin Engineering Research Center for Spine and Spinal Cord Injury, China
| | - Zhenshan Lv
- Department of Spine Surgery, Orthopedics Center, First Hospital of Jilin University, No. 1 Xinmin Street, Changchun, 130021, China,Jilin Engineering Research Center for Spine and Spinal Cord Injury, China
| | - Chunsheng Xiao
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China
| | - Hao Wang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China,Corresponding author.
| | - Shaokun Zhang
- Department of Spine Surgery, Orthopedics Center, First Hospital of Jilin University, No. 1 Xinmin Street, Changchun, 130021, China,Jilin Engineering Research Center for Spine and Spinal Cord Injury, China,Corresponding author. Department of Spine Surgery, Orthopedics Center, First Hospital of Jilin University, No. 1 Xinmin Street, Changchun, 130021, China.
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26
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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
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27
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Jain C, Surabhi P, Marathe K. Critical Review on the Developments in Polymer Composite Materials for Biomedical Implants. JOURNAL OF BIOMATERIALS SCIENCE, POLYMER EDITION 2022; 34:893-917. [PMID: 36369719 DOI: 10.1080/09205063.2022.2145870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
There has been a lack of research for developing functional polymer composites for biomedical implants. Even though metals are widely used as implant materials, there is a need for developing polymer composites as implant materials because of the stress shielding effect that causes a lack of compatibility of metals with the human body. This review aims to bring out the latest developments in polymer composite materials for body implants and to emphasize the significance of polymer composites as a viable alternative to conventional materials used in the biomedical industry for ease of life. This review article explores the developments in functional polymer composites for biomedical applications and provides distinct divisions for their applications based on the part of the body where they are implanted. Each application has been covered in some detail. The various applications covered are bone transplants and bone regeneration, cardiovascular implants (stents), dental implants and restorative materials, neurological and spinal implants, and tendon and ligament replacement.
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Affiliation(s)
| | | | - Kumudinee Marathe
- Department of Chemical Engg, Institute of Chemical Technology, Matunga, Mumbai, Maharashtra, India 400019
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28
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Chen C, Ji H, Jiang N, Wang Y, Zhou Y, Zhu Z, Hu Y, Wang Y, Li A, Guo A. Thrombin increases the expression of cholesterol 25-hydroxylase in rat astrocytes after spinal cord injury. Neural Regen Res 2022; 18:1339-1346. [PMID: 36453421 PMCID: PMC9838143 DOI: 10.4103/1673-5374.357905] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Astrocytes are important cellular centers of cholesterol synthesis and metabolism that help maintain normal physiological function at the organism level. Spinal cord injury results in aberrant cholesterol metabolism by astrocytes and excessive production of oxysterols, which have profound effects on neuropathology. 25-Hydroxycholesterol (25-HC), the main product of the membrane-associated enzyme cholesterol-25-hydroxylase (CH25H), plays important roles in mediating neuroinflammation. However, whether the abnormal astrocyte cholesterol metabolism induced by spinal cord injury contributes to the production of 25-HC, as well as the resulting pathological effects, remain unclear. In the present study, spinal cord injury-induced activation of thrombin was found to increase astrocyte CH25H expression. A protease-activated receptor 1 inhibitor was able to attenuate this effect in vitro and in vivo. In cultured primary astrocytes, thrombin interacted with protease-activated receptor 1, mainly through activation of the mitogen-activated protein kinase/nuclear factor-kappa B signaling pathway. Conditioned culture medium from astrocytes in which ch25h expression had been knocked down by siRNA reduced macrophage migration. Finally, injection of the protease activated receptor 1 inhibitor SCH79797 into rat neural sheaths following spinal cord injury reduced migration of microglia/macrophages to the injured site and largely restored motor function. Our results demonstrate a novel regulatory mechanism for thrombin-regulated cholesterol metabolism in astrocytes that could be used to develop anti-inflammatory drugs to treat patients with spinal cord injury.
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Affiliation(s)
- Chen Chen
- Department of Rehabilitation Medicine, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China,Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu Province, China
| | - Huiyuan Ji
- Department of Rehabilitation Medicine, The Second Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China
| | - Nan Jiang
- Department of Rehabilitation Medicine, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China
| | - Yingjie Wang
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu Province, China
| | - Yue Zhou
- Department of Rehabilitation Medicine, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China
| | - Zhenjie Zhu
- Department of Rehabilitation Medicine, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China
| | - Yuming Hu
- Department of Rehabilitation Medicine, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China
| | - Yongjun Wang
- Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu Province, China
| | - Aihong Li
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China,Correspondence to: Aisong Guo, ; Aihong Li, .
| | - Aisong Guo
- Department of Traditional Chinese Medicine, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China,Correspondence to: Aisong Guo, ; Aihong Li, .
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29
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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.
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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.)
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30
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Zhang H, Hu T, Xiong M, Li S, Li WX, Liu J, Zhou X, Qi J, Jiang GB. Cannabidiol-loaded injectable chitosan-based hydrogels promote spinal cord injury repair by enhancing mitochondrial biogenesis. Int J Biol Macromol 2022; 221:1259-1270. [PMID: 36075309 DOI: 10.1016/j.ijbiomac.2022.09.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 08/31/2022] [Accepted: 09/02/2022] [Indexed: 11/19/2022]
Abstract
The treatment of traumatic spinal cord injury (SCI) remains challenging as the neuron regeneration is impaired by irregular cavity and apoptosis. An injectable in situ gelling hydrogel is therefore developed for the local delivery of cannabidiol (CBD) through a novel method based on polyelectrolyte (PEC) interaction of sodium carboxymethylcellulose (CMC) and chitosan (CS). It can be injected into the spinal cord cavity with a 26-gauge syringe before gelation, and gelled after 110 ± 10 s. Of note, the in-situ forming hydrogel has mechanical properties similar to spinal cord. Moreover, the CBD-loaded hydrogels sustain delivery of CBD for up to 72 h, resulting in reducing apoptosis in SCI by enhancing mitochondrial biogenesis. Importantly, the CBD-loaded hydrogels raise neurogenesis more than pure hydrogels both in vivo and in vitro, further achieving significant recovery of motor and urinary function in SCI rats. Thus, it suggested that CMC/CS/CBD hydrogels could be used as promising biomaterials for tissue engineering and SCI.
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Affiliation(s)
- Hongyan Zhang
- College of Veterinary, South China Agricultural University, Guangzhou 510642, China; College of Materials and energy, South China Agricultural University, Guangzhou 510642, China.
| | - Tian Hu
- College of Materials and energy, South China Agricultural University, Guangzhou 510642, China
| | - Mingxin Xiong
- College of Materials and energy, South China Agricultural University, Guangzhou 510642, China
| | - Shanshan Li
- College of Materials and energy, South China Agricultural University, Guangzhou 510642, China
| | - Wei-Xiong Li
- College of Veterinary, South China Agricultural University, Guangzhou 510642, China; College of Materials and energy, South China Agricultural University, Guangzhou 510642, China
| | - Jinwen Liu
- College of Materials and energy, South China Agricultural University, Guangzhou 510642, China
| | - Xiang Zhou
- Department of Microsurgery, Trauma and Hand Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, China
| | - Jian Qi
- Department of Microsurgery, Trauma and Hand Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, China
| | - Gang-Biao Jiang
- College of Veterinary, South China Agricultural University, Guangzhou 510642, China; College of Materials and energy, South China Agricultural University, Guangzhou 510642, China.
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31
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Zou F, Xu J, Yuan L, Zhang Q, Jiang L. Recent progress on smart hydrogels for biomedicine and bioelectronics. BIOSURFACE AND BIOTRIBOLOGY 2022. [DOI: 10.1049/bsb2.12046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Fa Zou
- Key Laboratory of Fluid and Power Machinery of Ministry of Education School of Materials Science and Engineering Xihua University Chengdu China
| | - Jiefang Xu
- School of Literature, Journalism and Communication Xihua University Chengdu China
| | - Le Yuan
- Key Laboratory of Fluid and Power Machinery of Ministry of Education School of Materials Science and Engineering Xihua University Chengdu China
| | - Qinyong Zhang
- Key Laboratory of Advanced Technologies of Materials Ministry of Education School of Materials Science and Engineering Southwest Jiaotong University Chengdu Sichuan China
| | - Lili Jiang
- Key Laboratory of Fluid and Power Machinery of Ministry of Education School of Materials Science and Engineering Xihua University Chengdu China
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32
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Liu K, Dong X, Wang Y, Wu X, Dai H. Dopamine-modified chitosan hydrogel for spinal cord injury. Carbohydr Polym 2022; 298:120047. [DOI: 10.1016/j.carbpol.2022.120047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 08/09/2022] [Accepted: 08/25/2022] [Indexed: 11/17/2022]
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33
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Jing X, Fu H, Yu B, Sun M, Wang L. Two-photon polymerization for 3D biomedical scaffolds: Overview and updates. Front Bioeng Biotechnol 2022; 10:994355. [PMID: 36072288 PMCID: PMC9441635 DOI: 10.3389/fbioe.2022.994355] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 07/29/2022] [Indexed: 01/23/2023] Open
Abstract
The needs for high-resolution, well-defined and complex 3D microstructures in diverse fields call for the rapid development of novel 3D microfabrication techniques. Among those, two-photon polymerization (TPP) attracted extensive attention owing to its unique and useful characteristics. As an approach to implementing additive manufacturing, TPP has truly 3D writing ability to fabricate artificially designed constructs with arbitrary geometry. The spatial resolution of the manufactured structures via TPP can exceed the diffraction limit. The 3D structures fabricated by TPP could properly mimic the microenvironment of natural extracellular matrix, providing powerful tools for the study of cell behavior. TPP can meet the requirements of manufacturing technique for 3D scaffolds (engineering cell culture matrices) used in cytobiology, tissue engineering and regenerative medicine. In this review, we demonstrated the development in 3D microfabrication techniques and we presented an overview of the applications of TPP as an advanced manufacturing technique in complex 3D biomedical scaffolds fabrication. Given this multidisciplinary field, we discussed the perspectives of physics, materials science, chemistry, biomedicine and mechanical engineering. Additionally, we dived into the principles of tow-photon absorption (TPA) and TPP, requirements of 3D biomedical scaffolders, developed-to-date materials and chemical approaches used by TPP and manufacturing strategies based on mechanical engineering. In the end, we draw out the limitations of TPP on 3D manufacturing for now along with some prospects of its future outlook towards the fabrication of 3D biomedical scaffolds.
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Affiliation(s)
- Xian Jing
- Key Laboratory of Micro/Nano and Ultra-precision Manufacturing, School of Mechatronic Engineering, Changchun University of Technology, Changchun, Jilin, China
| | - Hongxun Fu
- Key Laboratory of Micro/Nano and Ultra-precision Manufacturing, School of Mechatronic Engineering, Changchun University of Technology, Changchun, Jilin, China
| | - Baojun Yu
- Key Laboratory of Micro/Nano and Ultra-precision Manufacturing, School of Mechatronic Engineering, Changchun University of Technology, Changchun, Jilin, China
| | - Meiyan Sun
- College of Laboratory Medicine, Jilin Medical University, Jilin, China
| | - Liye Wang
- College of Pharmacy, University of Houston, Houston, TX, United States
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34
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Liu T, Zhu W, Zhang X, He C, Liu X, Xin Q, Chen K, Wang H. Recent Advances in Cell and Functional Biomaterial Treatment for Spinal Cord Injury. BIOMED RESEARCH INTERNATIONAL 2022; 2022:5079153. [PMID: 35978649 PMCID: PMC9377911 DOI: 10.1155/2022/5079153] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 07/17/2022] [Accepted: 07/25/2022] [Indexed: 12/17/2022]
Abstract
Spinal cord injury (SCI) is a devastating central nervous system disease caused by accidental events, resulting in loss of sensory and motor function. Considering the multiple effects of primary and secondary injuries after spinal cord injury, including oxidative stress, tissue apoptosis, inflammatory response, and neuronal autophagy, it is crucial to understand the underlying pathophysiological mechanisms, local microenvironment changes, and neural tissue functional recovery for preparing novel treatment strategies. Treatment based on cell transplantation has become the forefront of spinal cord injury therapy. The transplanted cells provide physical and nutritional support for the damaged tissue. At the same time, the implantation of biomaterials with specific biological functions at the site of the SCI has also been proved to improve the local inhibitory microenvironment and promote axonal regeneration, etc. The combined transplantation of cells and functional biomaterials for SCI treatment can result in greater neuroprotective and regenerative effects by regulating cell differentiation, enhancing cell survival, and providing physical and directional support for axon regeneration and neural circuit remodeling. This article reviews the pathophysiology of the spinal cord, changes in the microenvironment after injury, and the mechanisms and strategies for spinal cord regeneration and repair. The article will focus on summarizing and discussing the latest intervention models based on cell and functional biomaterial transplantation and the latest progress in combinational therapies in SCI repair. Finally, we propose the future prospects and challenges of current treatment regimens for SCI repair, to provide references for scientists and clinicians to seek better SCI repair strategies in the future.
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Affiliation(s)
- Tianyi Liu
- Department of Neurosurgery, First Hospital of Jilin University, Changchun 130021, China
| | - Wenhao Zhu
- Department of Neurosurgery, First Hospital of Jilin University, Changchun 130021, China
| | - Xiaoyu Zhang
- Department of Neurosurgery, First Hospital of Jilin University, Changchun 130021, China
| | - Chuan He
- Department of Neurosurgery, First Hospital of Jilin University, Changchun 130021, China
| | - Xiaolong Liu
- Department of Neurosurgery, First Hospital of Jilin University, Changchun 130021, China
| | - Qiang Xin
- Department of Neurosurgery, First Hospital of Jilin University, Changchun 130021, China
| | - Kexin Chen
- Institute of Translational Medicine, First Hospital of Jilin University, Changchun 130021, China
| | - Haifeng Wang
- Department of Neurosurgery, First Hospital of Jilin University, Changchun 130021, China
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Agarwal G, Roy A, Kumar H, Srivastava A. Graphene-collagen cryogel controls neuroinflammation and fosters accelerated axonal regeneration in spinal cord injury. BIOMATERIALS ADVANCES 2022; 139:212971. [PMID: 35882128 DOI: 10.1016/j.bioadv.2022.212971] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 05/11/2022] [Accepted: 06/02/2022] [Indexed: 06/15/2023]
Abstract
Spinal cord injury (SCI) is a devastating condition resulting in loss of motor function. The pathology of SCI is multifaceted and involves a cascade of events, including neuroinflammation and neuronal degeneration at the epicenter, limiting repair process. We developed a supermacroporous, mechanically elastic, electro-conductive, graphene crosslinked collagen (Gr-Col) cryogels for the regeneration of the spinal cord post-injury. The effects of graphene in controlling astrocytes reactivity and microglia polarization are evaluated in spinal cord slice organotypic culture and rat spinal cord lateral hemisection model of SCI. In our work, the application of external electric stimulus results in the enhanced expression of neuronal markers in an organotypic culture. The implantation of Gr-Col cryogels in rat thoracic T9-T11 hemisection model demonstrates an improved functional recovery within 14 days post-injury (DPI), promoted myelination, and decreases the lesion volume at the injury site. Decrease in the expression of STAT3 in the implanted Gr-Col cryogels may be responsible for the decrease in astrocytes reactivity. Microglia cells within the implanted cryogels shows higher anti-inflammatory phenotype (M2) than inflammatory (M1) phenotype. The higher expression of mature axonal markers like β-tubulin III, GAP43, doublecortin, and neurofilament 200 in the implanted Gr-Col cryogel confirms the axonal regeneration after 28 DPI. Gr-Col cryogels also modulate the production of ECM matrix, favouring the axonal regeneration. This study shows that Gr-Col cryogels decreases neuroinflammation and accelerate axonal regeneration.
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Affiliation(s)
- Gopal Agarwal
- Department of Biotechnology, National Institute of Pharmaceutical Educational and Research, Ahmedabad, Gandhinagar, India
| | - Abhishek Roy
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Educational and Research, Ahmedabad, Gandhinagar, India
| | - Hemant Kumar
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Educational and Research, Ahmedabad, Gandhinagar, India.
| | - Akshay Srivastava
- Department of Medical Device, National Institute of Pharmaceutical Educational and Research, Ahmedabad, Gandhinagar, India.
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Wu H, Zhao C, Lin K, Wang X. Mussel-Inspired Polydopamine-Based Multilayered Coatings for Enhanced Bone Formation. Front Bioeng Biotechnol 2022; 10:952500. [PMID: 35875492 PMCID: PMC9301208 DOI: 10.3389/fbioe.2022.952500] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 06/17/2022] [Indexed: 12/03/2022] Open
Abstract
Repairing bone defects remains a challenge in clinical practice and the application of artificial scaffolds can enhance local bone formation, but the function of unmodified scaffolds is limited. Considering different application scenarios, the scaffolds should be multifunctionalized to meet specific demands. Inspired by the superior adhesive property of mussels, polydopamine (PDA) has attracted extensive attention due to its universal capacity to assemble on all biomaterials and promote further adsorption of multiple external components to form PDA-based multilayered coatings with multifunctional property, which can induce synergistic enhancement of new bone formation, such as immunomodulation, angiogenesis, antibiosis and antitumor property. This review will summarize mussel-inspired PDA-based multilayered coatings for enhanced bone formation, including formation mechanism and biofunction of PDA coating, as well as different functional components. The synergistic enhancement of multiple functions for better bone formation will also be discussed. This review will inspire the design and fabrication of PDA-based multilayered coatings for different application scenarios and promote deeper understanding of their effect on bone formation, but more efforts should be made to achieve clinical translation. On this basis, we present a critical conclusion, and forecast the prospects of PDA-based multilayered coatings for bone regeneration.
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Affiliation(s)
| | | | - Kaili Lin
- *Correspondence: Kaili Lin, ; Xudong Wang,
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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]
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Lu D, Yang Y, Zhang P, Ma Z, Li W, Song Y, Feng H, Yu W, Ren F, Li T, Zeng H, Wang J. Development and Application of Three-Dimensional Bioprinting Scaffold in the Repair of Spinal Cord Injury. Tissue Eng Regen Med 2022; 19:1113-1127. [PMID: 35767151 DOI: 10.1007/s13770-022-00465-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 05/13/2022] [Accepted: 05/15/2022] [Indexed: 01/04/2023] Open
Abstract
Spinal cord injury (SCI) is a disabling and destructive central nervous system injury that has not yet been successfully treated at this stage. Three-dimensional (3D) bioprinting has become a promising method to produce more biologically complex microstructures, which fabricate living neural constructs with anatomically accurate complex geometries and spatial distributions of neural stem cells, and this is critical in the treatment of SCI. With the development of 3D printing technology and the deepening of research, neural tissue engineering research using different printing methods, bio-inks, and cells to repair SCI has achieved certain results. Although satisfactory results have not yet been achieved, they have provided novel ideas for the clinical treatment of SCI. Considering the potential impact of 3D bioprinting technology on neural studies, this review focuses on 3D bioprinting methods widely used in SCI neural tissue engineering, and the latest technological applications of bioprinting of nerve tissues for the repair of SCI are discussed. In addition to introducing the recent progress, this work also describes the existing limitations and highlights emerging possibilities and future prospects in this field.
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Affiliation(s)
- Dezhi Lu
- School of Medicine, Shanghai University, Shanghai, 200444, China
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Yang Yang
- Department of Rehabilitation Medicine, Shandong Provincial Third Hospital, Shandong, 250000, China
| | - Pingping Zhang
- School of Rehabilitation Medicine, Weifang Medical University, Weifang, 261053, China
| | - Zhenjiang Ma
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Wentao Li
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Yan Song
- School of Rehabilitation Medicine, Weifang Medical University, Weifang, 261053, China
| | - Haiyang Feng
- School of Rehabilitation Medicine, Weifang Medical University, Weifang, 261053, China
| | - Wenqiang Yu
- School of Rehabilitation Medicine, Weifang Medical University, Weifang, 261053, China
| | - Fuchao Ren
- School of Rehabilitation Medicine, Weifang Medical University, Weifang, 261053, China
| | - Tao Li
- Department of Orthopaedics, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, 200092, China.
| | - Hong Zeng
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China.
| | - Jinwu Wang
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China.
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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: 13] [Impact Index Per Article: 6.5] [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.
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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
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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: 17] [Impact Index Per Article: 8.5] [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.
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Medvediev VV, Oleksenko NP, Pichkur LD, Verbovska SA, Savosko SI, Draguntsova NG, Lontkovskiy YA, Vaslovych VV, Tsymbalyuk VI. Effect of Implantation of a Fibrin Matrix Associated with Neonatal Brain Cells on the Course of an Experimental Spinal Cord Injury. CYTOL GENET+ 2022. [DOI: 10.3103/s0095452722020086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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42
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The Role of Tissue Geometry in Spinal Cord Regeneration. MEDICINA (KAUNAS, LITHUANIA) 2022; 58:medicina58040542. [PMID: 35454380 PMCID: PMC9028021 DOI: 10.3390/medicina58040542] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 04/11/2022] [Indexed: 11/17/2022]
Abstract
Unlike peripheral nerves, axonal regeneration is limited following injury to the spinal cord. While there may be reduced regenerative potential of injured neurons, the central nervous system (CNS) white matter environment appears to be more significant in limiting regrowth. Several factors may inhibit regeneration, and their neutralization can modestly enhance regrowth. However, most investigations have not considered the cytoarchitecture of spinal cord white matter. Several lines of investigation demonstrate that axonal regeneration is enhanced by maintaining, repairing, or reconstituting the parallel geometry of the spinal cord white matter. In this review, we focus on environmental factors that have been implicated as putative inhibitors of axonal regeneration and the evidence that their organization may be an important determinant in whether they inhibit or promote regeneration. Consideration of tissue geometry may be important for developing successful strategies to promote spinal cord regeneration.
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Electroconductive and porous graphene-xanthan gum gel scaffold for spinal cord regeneration. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Characterization of a Novel Aspect of Tissue Scarring Following Experimental Spinal Cord Injury and the Implantation of Bioengineered Type-I Collagen Scaffolds in the Adult Rat: Involvement of Perineurial-like Cells? Int J Mol Sci 2022; 23:ijms23063221. [PMID: 35328642 PMCID: PMC8954100 DOI: 10.3390/ijms23063221] [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: 01/23/2022] [Revised: 03/04/2022] [Accepted: 03/15/2022] [Indexed: 11/17/2022] Open
Abstract
Numerous intervention strategies have been developed to promote functional tissue repair following experimental spinal cord injury (SCI), including the bridging of lesion-induced cystic cavities with bioengineered scaffolds. Integration between such implanted scaffolds and the lesioned host spinal cord is critical for supporting regenerative growth, but only moderate-to-low degrees of success have been reported. Light and electron microscopy were employed to better characterise the fibroadhesive scarring process taking place after implantation of a longitudinally microstructured type-I collagen scaffold into unilateral mid-cervical resection injuries of the adult rat spinal cord. At long survival times (10 weeks post-surgery), sheets of tightly packed cells (of uniform morphology) could be seen lining the inner surface of the repaired dura mater of lesion-only control animals, as well as forming a barrier along the implant–host interface of the scaffold-implanted animals. The highly uniform ultrastructural features of these scarring cells and their anatomical continuity with the local, reactive spinal nerve roots strongly suggest their identity to be perineurial-like cells. This novel aspect of the cellular composition of reactive spinal cord tissue highlights the increasingly complex nature of fibroadhesive scarring involved in traumatic injury, and particularly in response to the implantation of bioengineered collagen scaffolds.
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45
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Kim JM, Kyung H, Song YS. Analysis of poly(dioxanone) foam prepared using salt leaching method. J Appl Polym Sci 2022. [DOI: 10.1002/app.52331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jung Min Kim
- Department of Fiber Convergence Materials Engineering Dankook University Yongin‐si Gyeonggi Do Korea
| | - Haksu Kyung
- Department of Ophthalmology National Medical Center Seoul Korea
| | - Young Seok Song
- Department of Fiber Convergence Materials Engineering Dankook University Yongin‐si Gyeonggi Do Korea
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Du J, Liu X, Yarema KJ, Jia X. Glycoengineering human neural stem cells (hNSCs) for adhesion improvement using a novel thiol-modified N-acetylmannosamine (ManNAc) analog. BIOMATERIALS ADVANCES 2022; 134:112675. [PMID: 35599100 PMCID: PMC9300770 DOI: 10.1016/j.msec.2022.112675] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 01/16/2022] [Accepted: 01/18/2022] [Indexed: 12/20/2022]
Abstract
This study sets the stage for the therapeutic use of Ac5ManNTProp, an N-acetylmannosamine (ManNAc) analog that installs thiol-modified sialoglycans onto the surfaces of human neural stem cells (hNSC). First, we compared hNSC adhesion to the extracellular matrix (ECM) proteins laminin, fibronectin, and collagen and found preferential adhesion and concomitant changes to cell morphology and cell spreading for Ac5ManNTProp-treated cells to laminin, compared to fibronectin where there was a modest response, and collagen where there was no observable increase. PCR array transcript analysis identified several classes of cell adhesion molecules that responded to combined Ac5ManNTProp treatment and hNSC adhesion to laminin. Of these, we focused on integrin α6β1 expression, which was most strongly upregulated in analog-treated cells incubated on laminin. We also characterized downstream responses including vinculin display as well as the phosphorylation of focal adhesion kinase (FAK) and extracellular signal-related kinase (ERK). In these experiments, Ac5ManNTProp more strongly induced all tested biological endpoints compared to Ac5ManNTGc, showing that the single methylene unit that structurally separates the two analogs finely tunes biological responses. Together, the concerted modulation of multiple pro-regenerative activities through Ac5ManNTProp treatment, in concert with crosstalk with ECM components, lays a foundation for using our metabolic glycoengineering approach to treat neurological disorders by favorably modulating endpoints that contribute to the viability of transplanted NSCs.
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Affiliation(s)
- Jian Du
- Department of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD 21201
| | - Xiao Liu
- Department of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD 21201
| | - Kevin J. Yarema
- Department of Biomedical Engineering, The Johns Hopkins School of Medicine, Baltimore, MD, 21205,Translational Cell and Tissue Engineering Center, The Johns Hopkins School of Medicine, Baltimore, MD, 21231
| | - Xiaofeng Jia
- Department of Neurosurgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Department of Biomedical Engineering, The Johns Hopkins School of Medicine, Baltimore, MD 21205, USA; Department of Orthopedics, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Department of Anesthesiology and Critical Care Medicine, The Johns Hopkins School of Medicine, Baltimore, MD 21205, USA.
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Yu C, Yao F, Li J. Rational design of injectable conducting polymer-based hydrogels for tissue engineering. Acta Biomater 2022; 139:4-21. [PMID: 33894350 DOI: 10.1016/j.actbio.2021.04.027] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 04/12/2021] [Accepted: 04/13/2021] [Indexed: 12/11/2022]
Abstract
Recently, injectable conducting polymer-based hydrogels (CPHs) have received increasing attention in tissue engineering owing to their controlled conductivity and minimally invasive procedures. Conducting polymers (CPs) are introduced into hydrogels to improve the electrical integration between hydrogels and host tissues and promote the repair of damaged tissues. Furthermore, endowing CPHs with in situ gelation or shear-thinning properties can reduce the injury size and inflammation caused by implanted surgery materials, which approaches the clinical transformation target of conductive biomaterials. Notably, functional CPs, including hydrophilic CP complexes, side-chain modified CPs, and conducting graft polymers, improve the water-dispersible and biocompatible properties of CPs and exhibit significant advantages in fabricating injectable CPHs under physiological conditions. This review discusses the recent progress in designing injectable hydrogels based on functional CPs. Their potential applications in neurological treatment, myocardial repair, and skeletal muscle regeneration are further highlighted. STATEMENT OF SIGNIFICANCE: Conducting polymer-based hydrogels (CPHs) have broad application prospects in the biomedical field. However, the low water dispersibility and processability of conducting polymers (CPs) make them challenging to form injectable CPHs uniformly. For the first time, this review summarizes the functionalization strategies to improve the hydrophilicity and biocompatibility of CPs, which provides unprecedented advantages for designing and fabricating the physical/chemical crosslinked injectable CPHs. Besides, future challenges and prospects for further clinical transformation of injectable CPHs for tissue engineering are presented. This review's content is of great significance for the treatment of electroactive tissues with limited self-regeneration, including neurological treatment, myocardial repair, and skeletal muscle regeneration. Therefore, it is inspiring for the tissue engineering research of biomaterials and medical practitioners.
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Song S, Liu X, Huang J, Zhang Z. Neural stem cell-laden 3D bioprinting of polyphenol-doped electroconductive hydrogel scaffolds for enhanced neuronal differentiation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2022; 133:112639. [DOI: 10.1016/j.msec.2021.112639] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 12/25/2021] [Accepted: 12/28/2021] [Indexed: 01/15/2023]
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Luo J, Shi X, Li L, Tan Z, Feng F, Li J, Pang M, Wang X, He L. An injectable and self-healing hydrogel with controlled release of curcumin to repair spinal cord injury. Bioact Mater 2021; 6:4816-4829. [PMID: 34136725 PMCID: PMC8175285 DOI: 10.1016/j.bioactmat.2021.05.022] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 05/08/2021] [Accepted: 05/08/2021] [Indexed: 12/16/2022] Open
Abstract
The harsh local micro-environment following spinal cord injury (SCI) remains a great challenge for neural regeneration. Local reconstitution of a favorable micro-environment by biocompatible scaffolds with desirable functions has thus been an area of concern. Herein, a hybrid hydrogel was developed using Fmoc-grafted chitosan (FC) and Fmoc peptide (FI). Dynamic reversible π-π stacking interactions of the fluorenyl rings enabled the FC/FI hybrid hydrogel to exhibit excellent injectable and self-healing properties, as characterized by visual appearances and rheological tests. Furthermore, the FC/FI hybrid hydrogel showed a slow and persistent release of curcumin (Cur), which was named as FC/FI-Cur hydrogel. In vitro studies confirmed that with the support of FC/FI-Cur hydrogel, neurite outgrowth was promoted, and Schwann cell (SC) migration away from dorsal root ganglia (DRG) spheres with enhanced myelination was substantiated. The FC/FI-Cur hydrogel well reassembled extracellular matrix at the lesion site of rat spinal cord and exerted outstanding effects in modulating local inflammatory reaction by regulating the phenotypes of infiltrated inflammatory cells. In addition, endogenous SCs were recruited in the FC/FI-Cur graft and participated in the remyelination process of the regenerated nerves. These outcomes favored functional recovery, as evidenced by improved hind limbs movement and enhanced electrophysiological properties. Thus, our study not only advanced the development of multifunctional hydrogels but also provided insights into comprehensive approaches for SCI repair.
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Affiliation(s)
- Jinghua Luo
- MOE Joint International Research Laboratory of CNS Regeneration, Jinan University, Guangzhou, 510632, China
- College of Life Science and Technology, Jinan University, Guangzhou, 510630, China
| | - Xueshuang Shi
- MOE Joint International Research Laboratory of CNS Regeneration, Jinan University, Guangzhou, 510632, China
| | - Liming Li
- MOE Joint International Research Laboratory of CNS Regeneration, Jinan University, Guangzhou, 510632, China
| | - Zan Tan
- Department of Spine Surgery, The 3rd Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510630, China
| | - Feng Feng
- Department of Spine Surgery, The 3rd Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510630, China
| | - Jun Li
- MOE Joint International Research Laboratory of CNS Regeneration, Jinan University, Guangzhou, 510632, China
| | - Mao Pang
- Department of Spine Surgery, The 3rd Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510630, China
| | - Xiaoying Wang
- College of Life Science and Technology, Jinan University, Guangzhou, 510630, China
| | - Liumin He
- MOE Joint International Research Laboratory of CNS Regeneration, Jinan University, Guangzhou, 510632, China
- Department of Spine Surgery, The 3rd Affiliated Hospital, Sun Yat-Sen University, Guangzhou, 510630, China
- College of Life Science and Technology, Jinan University, Guangzhou, 510630, China
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Song F, Kong Y, Shao C, Cheng Y, Lu J, Tao Y, Du J, Wang H. Chitosan-based multifunctional flexible hemostatic bio-hydrogel. Acta Biomater 2021; 136:170-183. [PMID: 34610476 DOI: 10.1016/j.actbio.2021.09.056] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 09/04/2021] [Accepted: 09/29/2021] [Indexed: 12/17/2022]
Abstract
Realizing the potential application of chitosan as an effective biomedical hemostatic agent has become an emerging research hotspot. However, fabricating a flexible chitosan-based hemostatic bio-hydrogel with self-adhesion feature in humid conditions and rapid hemostasis capability remains a challenge. Herein, we reported the development of chitosan-based hydrogels (DCS-PEGSH gels) with typical multilevel pore structures, which were cross-linked by 3-(3,4-dihydroxyphenyl) propionic acid-modified chitosan (DCS) and sebacic acid-terminated polyethylene glycol modified by p-hydroxybenzaldehyde (PEGSH). By precisely regulating the proportion of PEGSH, the fabricated bio-hydrogels displayed favorable cytocompatibility, suitable stretchability (∼780%), and blood absorbability (1300% ± 50%). Moreover, the strong adhesion (∼68.5 kPa) of the assembled bio-hydrogel ensured its firm adherence on pigskin and on bleeding wound in both static and dynamic humid environments without shedding, thus providing a long service life. The fabricated hydrogels exhibited shorter blood clotting time (50 s) and lower blood clotting index (BCI, 41) than the commercial chitosan sponge (288 s, BCI 65). Notably, the amount of blood loss from the liver in mice was reduced by almost 90% as compared to that for the control group. This study paves a solid way for developing a chitosan-based hydrogel with self-adhesive, self-healing, stretchability, biocompatibility, and antibacterial and antioxidant properties through molecular design and structural regulation, which will enable the biomedical application of chitosan in emergency hemostasis, particularly in joints and extremities. STATEMENT OF SIGNIFICANCE: The design and preparation of multifunctional integrated green adhesive bio-hydrogels while avoiding the use of organic solvents and toxic chemical reagents has been an emerging challenge. Herein, a flexible chitosan-based hemostatic bio-hydrogel that integrates multifunctional properties was successfully synthesized. The bio-hydrogel displayed suitable stretchability (780%) and blood absorbability (1300% ± 50%). Moreover, the strong adhesion (68.5 kPa) ensured firm adherence of the assembled hydrogel on pigskin and on the bleeding wound site in both static and dynamic humid environments without shedding, thus providing a long service life. In addition, the designed hydrogel showed good compatibility and antibacterial performance. The dynamic Schiff base endowed the bio-hydrogel with excellent self-healing performance without any external stimuli.
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