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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] [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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Kavand A, Noverraz F, Gerber-Lemaire S. Recent Advances in Alginate-Based Hydrogels for Cell Transplantation Applications. Pharmaceutics 2024; 16:469. [PMID: 38675129 PMCID: PMC11053880 DOI: 10.3390/pharmaceutics16040469] [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: 02/28/2024] [Revised: 03/19/2024] [Accepted: 03/20/2024] [Indexed: 04/28/2024] Open
Abstract
With its exceptional biocompatibility, alginate emerged as a highly promising biomaterial for a large range of applications in regenerative medicine. Whether in the form of microparticles, injectable hydrogels, rigid scaffolds, or bioinks, alginate provides a versatile platform for encapsulating cells and fostering an optimal environment to enhance cell viability. This review aims to highlight recent studies utilizing alginate in diverse formulations for cell transplantation, offering insights into its efficacy in treating various diseases and injuries within the field of regenerative medicine.
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Affiliation(s)
| | | | - Sandrine Gerber-Lemaire
- Group for Functionalized Biomaterials, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland; (A.K.); (F.N.)
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Wang Q, Han Q, Xu X, Ding X, Nie X, Xu X, Liu X, Zhang C, Li J, Shi Q. Bioinspired Zn-MOF doped radial porous chitosan-based sponge with antibacterial and antioxidant properties for rapid hemostasis and wound healing. Int J Biol Macromol 2024; 259:128960. [PMID: 38151078 DOI: 10.1016/j.ijbiomac.2023.128960] [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: 10/07/2023] [Revised: 12/06/2023] [Accepted: 12/20/2023] [Indexed: 12/29/2023]
Abstract
Herein, a novel bioinspired radial porous zinc-based metal-organic framework (Zn-MOF) doped sodium alginate/chitosan derivatives/pullulan-based SA/PSCS/Pul/Zn-MOF (SPCP/Zn) composites sponge with excellent antioxidant and antibacterial properties was fabricated by the ice-templating method. Boric acid (BA) and Ca2+, which were respectively used as hydrogen- and ionic- bonding cross-linkers, provided strong mechanical properties for sponge matrix composed of SA, PSCS, and Pul. The obtained SPCP/Zn sponge exhibited uniform porous morphology, proper hydrophilicity, and admirable biocompatibility. In addition, the SPCP/Zn sponge achieved a sustained release of Zn2+ and gallic acid, which displayed powerful antibacterial and antioxidant activities. Importantly, the SPCP/Zn sponge exhibited shorter rapid hemostasis (20.4 ± 2.9 s) and lower blood loss (19.8 ± 4.3 mg). The SPCP/Zn sponge also showed faster wound closure ratio for the rat full-thickness skin defect model. It was revealed that SPCP/Zn sponge could significantly accelerate and enhance wound healing through downregulating inflammatory cytokines (TNF-α, IL-6) and increasing the expression of growth factors (VEGF). Due to its excellent properties, the SPCP/Zn sponge may have promising potential in wound healing applications.
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Affiliation(s)
- Qingwu Wang
- Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China
| | - Qiaoyi Han
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China
| | - Xin Xu
- Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China
| | - Xu Ding
- Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China
| | - Xiaojuan Nie
- Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China
| | - Xiaodong Xu
- Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China.
| | - Xia Liu
- School of Chemstry, Southwest Jiaotong University, Chengdu 610031, PR China.
| | - Chunhong Zhang
- Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China; Yantai Research Institute of Harbin Engineering University, Yantai, 264006, PR China
| | - Junqing Li
- Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China
| | - Qiang Shi
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China.
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Babaei A, Tiraihi T, Ai J, Baheiraei N. Enhanced growth and differentiation of neural stem cells on alginate/collagen/reduced graphene oxide composite hydrogel incorporated with lithium chloride. BIOIMPACTS : BI 2023; 13:475-487. [PMID: 38022379 PMCID: PMC10676529 DOI: 10.34172/bi.2023.24266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 08/14/2022] [Accepted: 08/16/2022] [Indexed: 12/01/2023]
Abstract
Introduction Cell transplantation with hydrogel-based carriers is one of the advanced therapeutics for challenging diseases, such as spinal cord injury. Electrically conductive hydrogel has received much attention for its effect on nerve outgrowth and differentiation. Besides, a load of neuroprotective substances, such as lithium chloride can promote the differentiation properties of the hydrogel. Methods In this study, alginate/collagen/reduced graphene oxide hydrogel loaded with lithium chloride (AL/CO/rGO Li+) was prepared as an injectable cell delivery system for neural tissue regeneration. After determining the lithium-ion release profile, an MTT assay was performed to check neural viability. In the next step, real-time PCR was performed to evaluate the expression of cell adhesion and neurogenic markers. Results Our results showed that the combination of collagen fibers and rGO with alginates increased cell viability and the gene expression of collagen-binding receptor subunits such as integrin α1, and β1. Further, rGO contributed to the controlled release of lithium-ion hydrogel in terms of its plenty of negatively charged functional groups. The continuous culture of NSCs on AL/CO/rGO Li+ hydrogel increased neurogenic genes' expressions of nestin (5.9 fold), NF200 (36.8 fold), and synaptophysin (13.2 fold), as well as protein expression of NF200 and synaptophysin after about 14 days. Conclusion The simultaneous ability of electrical conduction and lithium-ion release of AL/CO/rGO Li+ hydrogel could provide a favorable microenvironment for NSCs by improving their survival, maintaining cell morphology, and expressing the neural marker. It may be potentially used as a therapeutic approach for stem cell transplantation in a spinal cord injury.
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Affiliation(s)
- Azadeh Babaei
- Department of Anatomical Sciences, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Taki Tiraihi
- Department of Anatomical Sciences, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Jajar Ai
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Nafiseh Baheiraei
- Department of Anatomical Sciences, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
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Huang Y, Wang J, Yue C, Wang R, Guo Q, Wang T, Wang D, Dong H, Hu Y, Tao G, Li X. An In Situ Assembled Trapping Gel Repairs Spinal Cord Injury by Capturing Glutamate and Free Calcium Ions. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2206229. [PMID: 36683214 DOI: 10.1002/smll.202206229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 01/01/2023] [Indexed: 06/17/2023]
Abstract
Spinal cord injury (SCI) can lead to devastating autonomic dysfunction. One of the most challenging issues for functional repair in SCI is the secondary damage caused by the increased release of glutamate and free Ca2+ from injured cells. Here, an in situ assembled trapping gel (PF-SA-GAD) is developed to sweep glutamate and Ca2+ , promoting SCI repair. The hydrogel solution is a mixture of recombinant glutamate decarboxylase 67 (rGAD67) protein, sodium alginate (SA), and pluronic F-127 (PF-127). After intrathecal administration, temperature-sensitive PF-127 promoted in situ gelation. Glutamate (Glu) is captured and decarboxylated by rGAD67 into γ-aminobutyric acid (GABA). SA reacted with the free Ca2+ to generate gellable calcium alginate. Thereby, this in situ trapping gel retarded secondary neuron injury caused by Glu and free Ca2+ during SCI. In rat models of SCI, PF-SA-GAD reduces the lesion volume and inflammatory response after SCI, restores the motor function of rats with SCI. Together, the in situ assembled trapping gel is a long-term effective and minimally invasive sweeper for the direct elimination of glutamate and Ca2+ from injury lesions and can be a novel strategy for SCI repair by preventing secondary injury.
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Affiliation(s)
- Ying Huang
- Department of Pain, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, 210008, China
| | - Jialun Wang
- Department of Gastroenterology, Affiliated Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, China
| | - Chunyan Yue
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School and School of Life Science, Nanjing University, Nanjing, 210008, China
- Institute of Drug R&D, Medical School, Nanjing University, Nanjing, 210008, China
| | - Ran Wang
- Department of Pain, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, 210008, China
| | - Qiyuan Guo
- Department of Gastroenterology, Affiliated Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, China
| | - Tingyu Wang
- Department of Pain, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, 210008, China
| | - Daojuan Wang
- Department of Pain, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, 210008, China
| | - Hong Dong
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School and School of Life Science, Nanjing University, Nanjing, 210008, China
- Institute of Drug R&D, Medical School, Nanjing University, Nanjing, 210008, China
| | - Yiqiao Hu
- State Key Laboratory of Pharmaceutical Biotechnology, Medical School and School of Life Science, Nanjing University, Nanjing, 210008, China
- Institute of Drug R&D, Medical School, Nanjing University, Nanjing, 210008, China
| | - Gaojian Tao
- Department of Pain, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, 210008, China
| | - Xihan Li
- Department of Pain, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, 210008, China
- Department of Gastroenterology, Affiliated Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing, 210008, China
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Zhang X, Jiang W, Lu Y, Mao T, Gu Y, Ju D, Dong C. Exosomes combined with biomaterials in the treatment of spinal cord injury. Front Bioeng Biotechnol 2023; 11:1077825. [PMID: 36994357 PMCID: PMC10040754 DOI: 10.3389/fbioe.2023.1077825] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Accepted: 02/27/2023] [Indexed: 03/16/2023] Open
Abstract
Spinal cord injury (SCI) is a serious and disabling disease with a high mortality rate. It often leads to complete or partial sensory and motor dysfunction and is accompanied by a series of secondary outcomes, such as pressure sores, pulmonary infections, deep vein thrombosis in the lower extremities, urinary tract infections, and autonomic dysfunction. Currently, the main treatments for SCI include surgical decompression, drug therapy, and postoperative rehabilitation. Studies have shown that cell therapy plays a beneficial role in the treatment of SCI. Nonetheless, there is controversy regarding the therapeutic effect of cell transplantation in SCI models. Meanwhile exosomes, as a new therapeutic medium for regenerative medicine, possess the advantages of small size, low immunogenicity, and the ability to cross the blood-spinal cord barrier. Certain studies have shown that stem cell-derived exosomes have anti-inflammatory effects and can play an irreplaceable role in the treatment of SCI. In this case, it is difficult for a single treatment method to play an effective role in the repair of neural tissue after SCI. The combination of biomaterial scaffolds and exosomes can better transfer and fix exosomes to the injury site and improve their survival rate. This paper first reviews the current research status of stem cell-derived exosomes and biomaterial scaffolds in the treatment of SCI respectively, and then describes the application of exosomes combined with biomaterial scaffolds in the treatment of SCI, as well as the challenges and prospects.
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Xiang W, Cao H, Tao H, Jin L, Luo Y, Tao F, Jiang T. Applications of chitosan-based biomaterials: From preparation to spinal cord injury neuroprosthetic treatment. Int J Biol Macromol 2023; 230:123447. [PMID: 36708903 DOI: 10.1016/j.ijbiomac.2023.123447] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 12/04/2022] [Accepted: 01/24/2023] [Indexed: 01/27/2023]
Abstract
Spinal cord injury (SCI)-related disabilities are a serious problem in the modern society. Further, the treatment of SCI is highly challenging and is urgently required in clinical practice. Research on nerve tissue engineering is an emerging approach for improving the treatment outcomes of SCI. Chitosan (CS) is a cationic polysaccharide derived from natural biomaterials. Chitosan has been found to exhibit excellent biological properties, such as nontoxicity, biocompatibility, biodegradation, and antibacterial activity. Recently, chitosan-based biomaterials have attracted significant attention for SCI repair in nerve tissue engineering applications. These studies revealed that chitosan-based biomaterials have various functions and mechanisms to promote SCI repair, such as promoting neural cell growth, guiding nerve tissue regeneration, delivering nerve growth factors, and as a vector for gene therapy. Chitosan-based biomaterials have proven to have excellent potential for the treatment of SCI. This review aims to introduce the recent advances in chitosan-based biomaterials for SCI treatment and to highlight the prospects for further application.
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Affiliation(s)
- Wei Xiang
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430060, China
| | - Hui Cao
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430060, China
| | - Hai Tao
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430060, China
| | - Lin Jin
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430060, China
| | - Yue Luo
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430060, China
| | - Fenghua Tao
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430060, China.
| | - Ting Jiang
- Department of Neurological Rehabilitation, Zhongnan Hospital of Wuhan University, Wuhan 430071, China.
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Ow V, Chang JJ, Chooi WH, Boo YJ, Tan RPT, Wong JHM, Parikh BH, Su X, Ng SY, Loh XJ, Xue K. Orthogonally crosslinked alginate conjugate thermogels with potential for cell encapsulation. Carbohydr Polym 2023; 302:120308. [PMID: 36604036 DOI: 10.1016/j.carbpol.2022.120308] [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: 06/08/2022] [Revised: 10/18/2022] [Accepted: 11/01/2022] [Indexed: 11/25/2022]
Abstract
Hydrogels with more than one mode of crosslinking have gained interest due to improved control over hydrogel properties such as mechanical strength using multiple stimuli. In this work, sodium alginate was covalently conjugated onto thermoresponsive polyurethanes to prepare hybrid polymers (EPC-Alg) that are responsive to both temperature and Ca2+, forming orthogonally crosslinked hydrogels which are non-toxic to cells. Notably, the crosslinks are fully reversible, allowing for gel strength to be modulated via selective removal of either stimulus, or complete deconstruction of the hydrogel network by removing both stimuli. Higher alginate fractions increased the hydrophilicity and Ca2+ response of the EPC-Alg hydrogel, enabling tunable modulation of the thermal stability, stiffness and gelation temperatures. The EPC-Alg hydrogel could sustain protein release for a month and encapsulate neural spheroids with high cell viability after 7-day culture, demonstrating feasibility towards 3D cell encapsulation in cell-based biomedical applications such as cell encapsulation and cell therapy.
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Affiliation(s)
- Valerie Ow
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis, Singapore 138634, Singapore; Department of Biomedical Engineering, National University of Singapore (NUS), 4 Engineering Drive 3, Singapore 117583, Singapore
| | - Jun Jie Chang
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis, Singapore 138634, Singapore
| | - Wai Hon Chooi
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, Proteos, Singapore 138673, Singapore
| | - Yi Jian Boo
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis, Singapore 138634, Singapore
| | - Rebekah P T Tan
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis, Singapore 138634, Singapore
| | - Joey H M Wong
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis, Singapore 138634, Singapore
| | - Bhav Harshad Parikh
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, Proteos, Singapore 138673, Singapore
| | - Xinyi Su
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, Proteos, Singapore 138673, Singapore; Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore (NUS), 1E Kent Ridge Road, Singapore 119228, Singapore; Singapore Eye Research Institute (SERI), 20 College Rd, Singapore 169856, Singapore
| | - Shi Yan Ng
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, Proteos, Singapore 138673, Singapore
| | - Xian Jun Loh
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis, Singapore 138634, Singapore; Department of Materials Science and Engineering, National University of Singapore (NUS), 9 Engineering Drive 1, Singapore 117575, Singapore; School of Materials Science and Engineering, Nanyang Technological University (NTU), 50 Nanyang Ave, Singapore 639798, Singapore.
| | - Kun Xue
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis, Singapore 138634, Singapore.
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Hu H, Chen X, Zhao K, Zheng W, Gao C. Recent Advances in Biomaterials-Based Therapies for Alleviation and Regeneration of Traumatic Brain Injury. Macromol Biosci 2023; 23:e2200577. [PMID: 36758541 DOI: 10.1002/mabi.202200577] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/27/2023] [Indexed: 02/11/2023]
Abstract
Traumatic brain injury (TBI), a major public health problem accompanied with numerous complications, usually leads to serve disability and huge financial burden. The adverse and unfavorable pathological environment triggers a series of secondary injuries, resulting in serious loss of nerve function and huge obstacle of endogenous nerve regeneration. With the advances in adaptive tissue regeneration biomaterials, regulation of detrimental microenvironment to reduce the secondary injury and to promote the neurogenesis becomes possible. The adaptive biomaterials could respond and regulate biochemical, cellular, and physiological events in the secondary injury, including excitotoxicity, oxidative stress, and neuroinflammation, to rebuild circumstances suitable for regeneration. In this review, the development of pathology after TBI is discussed, followed by the introduction of adaptive biomaterials based on various pathological characteristics. The adaptive biomaterials carried with neurotrophic factors and stem cells for TBI treatment are then summarized. Finally, the current drawbacks and future perspective of biomaterials for TBI treatment are suggested.
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Affiliation(s)
- Haijun Hu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Xiping Chen
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Kefei Zhao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Weiwei Zheng
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Changyou Gao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China.,Center for Healthcare Materials, Shaoxing Institute, Zhejiang University, Shaoxing, 312099, China
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10
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Suzuki H, Imajo Y, Funaba M, Ikeda H, Nishida N, Sakai T. Current Concepts of Biomaterial Scaffolds and Regenerative Therapy for Spinal Cord Injury. Int J Mol Sci 2023; 24:ijms24032528. [PMID: 36768846 PMCID: PMC9917245 DOI: 10.3390/ijms24032528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/05/2023] [Accepted: 01/11/2023] [Indexed: 02/03/2023] Open
Abstract
Spinal cord injury (SCI) is a catastrophic condition associated with significant neurological deficit and social and financial burdens. It is currently being managed symptomatically, with no real therapeutic strategies available. In recent years, a number of innovative regenerative strategies have emerged and have been continuously investigated in preclinical research and clinical trials. In the near future, several more are expected to come down the translational pipeline. Among ongoing and completed trials are those reporting the use of biomaterial scaffolds. The advancements in biomaterial technology, combined with stem cell therapy or other regenerative therapy, can now accelerate the progress of promising novel therapeutic strategies from bench to bedside. Various types of approaches to regeneration therapy for SCI have been combined with the use of supportive biomaterial scaffolds as a drug and cell delivery system to facilitate favorable cell-material interactions and the supportive effect of neuroprotection. In this review, we summarize some of the most recent insights of preclinical and clinical studies using biomaterial scaffolds in regenerative therapy for SCI and summarized the biomaterial strategies for treatment with simplified results data. One hundred and sixty-eight articles were selected in the present review, in which we focused on biomaterial scaffolds. We conducted our search of articles using PubMed and Medline, a medical database. We used a combination of "Spinal cord injury" and ["Biomaterial", or "Scaffold"] as search terms and searched articles published up until 30 April 2022. Successful future therapies will require these biomaterial scaffolds and other synergistic approaches to address the persistent barriers to regeneration, including glial scarring, the loss of a structural framework, and biocompatibility. This database could serve as a benchmark to progress in future clinical trials for SCI using biomaterial scaffolds.
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11
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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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12
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Qin P, Tang J, Sun D, Yang Y, Liu N, Li Y, Fu Z, Wang Y, Li C, Li X, Zhang Y, Liu Y, Wang S, Sun J, Deng Z, He L, Wang Y, Yang X. Zn 2+ Cross-Linked Alginate Carrying Hollow Silica Nanoparticles Loaded with RL-QN15 Peptides Provides Promising Treatment for Chronic Skin Wounds. ACS APPLIED MATERIALS & INTERFACES 2022; 14:29491-29505. [PMID: 35731847 DOI: 10.1021/acsami.2c03583] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Chronic and non-healing wounds pose a great challenge to clinical management and patients. Many studies have explored novel interventions against skin wounds, with bioactive peptides, nanoparticles, and hydrogels arousing considerable attention regarding their therapeutic potential. In this study, the prohealing peptide RL-QN15 was loaded into hollow silica nanoparticles (HSNs), with these HSN@RL-QN15 nanocomposites then combined with zinc alginate (ZA) gels to obtain HSN@RL-QN15/ZA hydrogel. The characteristics, biological properties, and safety profiles of the hydrogel composites were then evaluated. Results showed that the hydrogel had good porosity, hemocompatibility, biocompatibility, and broad-spectrum antimicrobial activity, with the slow release of loaded RL-QN15. Further analysis indicated that the hydrogel promoted skin cell proliferation and keratinocyte scratch repair, regulated angiogenesis, reduced inflammation, and accelerated re-epithelialization and granulation tissue formation, resulting in the rapid healing of both full-thickness skin wounds and methicillin-resistant Staphylococcus aureus biofilm-infected chronic wounds in mice. This peptide-based hydrogel provides a novel intervention for the treatment of chronic skin wounds and shows promise as a wound dressing in the field of tissue regeneration.
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Affiliation(s)
- Pan Qin
- Department of Biochemistry and Molecular Biology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, Yunnan 650500, China
| | - Jing Tang
- Department of Biochemistry and Molecular Biology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, Yunnan 650500, China
| | - Dandan Sun
- Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, Yunnan 650500, China
| | - Ying Yang
- Department of Endocrinology, Affiliated Hospital of Yunnan University, Kunming, Yunnan 650021, China
| | - Naixin Liu
- Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, Yunnan 650500, China
| | - Yilin Li
- Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, Yunnan 650500, China
| | - Zhe Fu
- Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, Yunnan 650500, China
| | - Yinglei Wang
- Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, Yunnan 650500, China
| | - Chao Li
- Department of Biochemistry and Molecular Biology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, Yunnan 650500, China
| | - Xiaojie Li
- Department of Biochemistry and Molecular Biology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, Yunnan 650500, China
| | - Yue Zhang
- Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, Yunnan 650500, China
| | - Yixiang Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, Shaanxi 710119, China
| | - Siyu Wang
- Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, Yunnan 650500, China
| | - Jun Sun
- Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, Yunnan 650500, China
| | - Ziwei Deng
- Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, Shaanxi 710119, China
| | - Li He
- Department of Dermatology, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650500, China
| | - Ying Wang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources & Key Laboratory of Natural Products Synthetic Biology of Ethnic Medicinal Endophytes, State Ethnic Affairs Commission & Ministry of Education, School of Ethnic Medicine, Yunnan Minzu University, Kunming, Yunnan 650504, China
| | - Xinwang Yang
- Department of Anatomy and Histology & Embryology, Faculty of Basic Medical Science, Kunming Medical University, Kunming, Yunnan 650500, China
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Samanipour R, Tahmooressi H, Rezaei Nejad H, Hirano M, Shin SR, Hoorfar M. A review on 3D printing functional brain model. BIOMICROFLUIDICS 2022; 16:011501. [PMID: 35145569 PMCID: PMC8816519 DOI: 10.1063/5.0074631] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Accepted: 12/31/2021] [Indexed: 05/08/2023]
Abstract
Modern neuroscience increasingly relies on 3D models to study neural circuitry, nerve regeneration, and neural disease. Several different biofabrication approaches have been explored to create 3D neural tissue model structures. Among them, 3D bioprinting has shown to have great potential to emerge as a high-throughput/high precision biofabrication strategy that can address the growing need for 3D neural models. Here, we have reviewed the design principles for neural tissue engineering. The main challenge to adapt printing technologies for biofabrication of neural tissue models is the development of neural bioink, i.e., a biomaterial with printability and gelation properties and also suitable for neural tissue culture. This review shines light on a vast range of biomaterials as well as the fundamentals of 3D neural tissue printing. Also, advances in 3D bioprinting technologies are reviewed especially for bioprinted neural models. Finally, the techniques used to evaluate the fabricated 2D and 3D neural models are discussed and compared in terms of feasibility and functionality.
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Affiliation(s)
| | - Hamed Tahmooressi
- Department of Mechanical Engineering, University of British Columbia, Kelowna, British Columbia V1V 1V7, Canada
| | - Hojatollah Rezaei Nejad
- Department of Electrical and Computer Engineering, Tufts University, 161 College Avenue, Medford, Massachusetts 02155, USA
| | | | - Su-Royn Shin
- Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02139, USA
- Authors to whom correspondence should be addressed: and
| | - Mina Hoorfar
- Faculty of Engineering, University of Victoria, Victoria, British Columbia V8W 2Y2, Canada
- Authors to whom correspondence should be addressed: and
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Liu X, Jiang X, Yu Q, Shen W, Tian H, Mei X, Wu C. Sodium alginate and Naloxone loaded macrophage-derived nanovesicles for the treatment of spinal cord injury. Asian J Pharm Sci 2021; 17:87-101. [PMID: 35261646 PMCID: PMC8888181 DOI: 10.1016/j.ajps.2021.11.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 11/06/2021] [Accepted: 11/09/2021] [Indexed: 12/18/2022] Open
Abstract
Spinal cord injury (SCI) causes Ca2+ overload, which can lead to inflammation and neuronal apoptosis. In this study, we prepared a nanovesicle derived from macrophage membrane (MVs), which encapsulated sodium alginate (SA) and naloxone (NAL) to inhibit inflammation and protect neurons by reducing the free Ca2+concentration at the SCI site. Based on the transmission electron microscopy (TEM) image, the encapsulated sample (NAL–SA–MVs) had a particle size of approximately 134 ± 11 nm and exhibited a sustained release effect. The encapsulation rate of NAL and SA was 82.07% ± 3.27% and 72.13% ± 2.61% in NAL–SA–MVs, respectively. Targeting tests showed that the NAL–SA–MVs could accumulate in large quantities and enhance the concentration of SA and NAL at the lesion sites. In vivo and in vitro studies indicated that the NAL–SA–MVs could decrease the concentration of free Ca2+, which should further alleviate the inflammatory response and neuronal apoptosis. Anti-inflammation results demonstrated that the NAL–SA–MVs could reduce the pro-inflammation factors (iNOS, TNF-α, IL-1β, IL-6) and increase the expression of anti-inflammation factors (IL-10) at the cell and animal level. Concurrently, fluorescence, flow cytometry and western blot characterization showed that the apoptotic condition of the neurons was significantly inhibited. In addition, the motor function of C57 mice were significantly improved after NAL–SA–MVs treatment. In conclusion, it is suggested that the NAL–SA–MVs has tremendous potential in the treatment of SCI.
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Affiliation(s)
- Xiaoyao Liu
- Pharmacy School, Jinzhou Medical University, Jinzhou 121001, China
| | - Xue Jiang
- Pharmacy School, Jinzhou Medical University, Jinzhou 121001, China
| | - Qi Yu
- Pharmacy School, Jinzhou Medical University, Jinzhou 121001, China
| | - Wenwen Shen
- Pharmacy School, Jinzhou Medical University, Jinzhou 121001, China
| | - He Tian
- Department of Histology and Embryology, Jinzhou Medical University, Jinzhou 121001, China
| | - Xifan Mei
- Department of Orthopedics, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou 121004, China
- Corresponding author.
| | - Chao Wu
- Pharmacy School, Jinzhou Medical University, Jinzhou 121001, China
- Corresponding author.
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Responsive Calcium (Ca<sup>2+</sup>) Alginate-Chitosan Based Hydrogel: A Promising Biomaterial for Spinal Cord Injury. JOURNAL OF BIOMIMETICS BIOMATERIALS AND BIOMEDICAL ENGINEERING 2021. [DOI: 10.4028/www.scientific.net/jbbbe.52.29] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Spinal cord injury is damage to the spinal cord which causes lesions in the spinal cord and leads to an increase in extracellular Ca2+. It results in additional neuronal loss which causes temporary/permanent disability or even death. The aim of this study was to determine characteristics and the best composition of alginate – chitosan hydrogel responsive to Calcium (Ca2+) for spinal cord injury. Hydrogel synthesis with its compositions, namely chitosan was dissolved in 0.4% acetic acid, neutralized in pH 7 with 0.5 M NaOH, added some 0.85% NaCl in it, and added 5 alginate variations which were dissolved in 0.85% NaCl, next will centrifugation method. Based on the FTIR test, hydrogel showed stretching vibrations of Chitosan’s O–H bonds appeared in 3415.93cm-1 wavenumber, while Na groups of alginate isomer appeared in 1413.82 cm-1 wavenumber. The results of the cytotoxicity test using the MTT Assay method showed live cell percentage from less than 50% to 52.61% in Sample B and 83.83% in Sample C. The results of the injectability test showed that all samples were injectable with the highest percentage of injectability at 98.283%. The results of the UV-Vis spectrophotometric test showed that all hydrogel samples were able to absorb Ca2+. Hydrogels can be degraded at more than 90% within 14 days. The results of the morphology test (SEM) obtained 84.7-99.6 μm pore sizes.
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Cheng J, Chen Z, Liu C, Zhong M, Wang S, Sun Y, Wen H, Shu T. Bone mesenchymal stem cell-derived exosome-loaded injectable hydrogel for minimally invasive treatment of spinal cord injury. Nanomedicine (Lond) 2021; 16:1567-1579. [PMID: 34189939 DOI: 10.2217/nnm-2021-0025] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Aim: Bone mesenchymal stem cell-derived exosomes (Exos) have been shown to exert therapeutic effects in spinal cord injury (SCI). In this study, we aimed to apply bioengineering approaches to promote Exo retention and their sustained release for SCI repair. Materials & methods: 3D gelatin methacrylate hydrogel (GelMA) was used as a transplanted Exo delivery system (GelMA-Exos). The viability, proliferation, and differentiation of neural stem cells cultured on hydrogel were assessed. Further, GelMA-Exos was injected into the damaged lesions to assess its repair potential. Results: GelMA hydrogel enhanced the retention of Exos, which promoted the neuronal differentiation and extension in vitro. Furthermore, GelMA-Exos promoted neurogenesis and attenuated glial scars in the damaged lesions. Conclusion: The injectable Exo-loaded 3D hydrogel induced neurological functional recovery post SCI.
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Affiliation(s)
- Jiyun Cheng
- School of Basic Medicine & Public Health, Jinan University, Guangzhou, 510630, China
| | - Zheng Chen
- Department of Stomatology, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510630, China
| | - Can Liu
- Department of Orthopedic Surgery, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, China
| | - Mei Zhong
- Intensive Care Unit, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, 510630, China
| | - Shihuan Wang
- Child Developmental & Behavioral Center, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510630, China
| | - Yongjian Sun
- Department of Pediatric Orthopedic, Center for Orthopedic Surgery, Third Affiliated Hospital of Southern Medical University, Guangzhou, 510515, China
| | - Huiquan Wen
- Department of Radiology, Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China
| | - Tao Shu
- Department of Spine Surgery, South China Hospital, Health Science Center, Shenzhen University, Shenzhen, 518116, China
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Cao J, Wu J, Mu J, Feng S, Gao J. The design criteria and therapeutic strategy of functional scaffolds for spinal cord injury repair. Biomater Sci 2021; 9:4591-4606. [PMID: 34018520 DOI: 10.1039/d1bm00361e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Spinal cord injury (SCI) remains a therapeutic challenge in clinic. Current drug and cell therapeutics have obtained significant efficacy but are still in the early stages for complete neural and functional recovery. In the past few decades, functional scaffolds (FSs) have been rapidly developed to bridge the lesion and provide a framework for tissue regeneration in SCI repair. Moreover, a FS can act as an adjuvant for locally delivering drugs in the lesion with a designed drug release profile, and supplying a biomimetic environment for implanted cells. In this review, the design criteria of FSs for SCI treatment are summarized according to their biocompatibility, mechanical properties, morphology, architecture, and biodegradability. Subsequently, FSs designed for SCI repair in the scope of drug delivery, cell implantation and combination therapy are introduced, respectively. And how a FS promotes their therapeutic efficacy is analyzed. Finally, the challenges, perspectives, and potential of FSs for SCI treatment are discussed. Hopefully, this review may inspire the future development of potent FSs to facilitate SCI repair in clinic.
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Affiliation(s)
- Jian Cao
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P.R. China.
| | - Jiahe Wu
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P.R. China.
| | - Jiafu Mu
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P.R. China.
| | - Shiqing Feng
- Department of Orthopedics, Tianjin Medical University General Hospital, Tianjin, 300052, P.R. China. and International Science and Technology Cooperation Base of Spinal Cord Injury, Tianjin Key Laboratory of Spine and Spinal Cord, Tianjin, 300052, P.R. China
| | - Jianqing Gao
- Institute of Pharmaceutics, Zhejiang Province Key Laboratory of Anti-Cancer Drug Research, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, P.R. China. and Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Hangzhou, 310058, P.R. China
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20
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Silva D, Sousa R, Salgado A. Hydrogels as delivery systems for spinal cord injury regeneration. Mater Today Bio 2021; 9:100093. [PMID: 33665602 PMCID: PMC7905359 DOI: 10.1016/j.mtbio.2021.100093] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 01/04/2021] [Accepted: 01/05/2021] [Indexed: 01/04/2023] Open
Abstract
Spinal cord injury is extremely debilitating, both at physiological and psychological levels, changing completely the patient's lifestyle. The introduction of biomaterials has opened a new window to develop a therapeutic approach to induce regeneration after injury due to similarities with extracellular matrix. Particularly, hydrogels have the ability to support axonal growth and endogenous regeneration. Moreover, they can also act as potential matrixes in which to load and deliver therapeutic agents at injury site. In this review, we highlight some important characteristics to be considered when designing hydrogels as delivery systems (DS), such as rheology, mesh size, swelling, degradation, gelation temperature and surface charge. Additionally, affinity-based release systems, incorporation of nanoparticles, or ion-mediated interactions are also pondered. Overall, hydrogel DS aim to promote a sustained, controlled and prolonged release at injury site, allowing a targeted oriented action of the therapeutic agent that will be used.
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Affiliation(s)
- D. Silva
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
- ICVS/3B's—PT Government Associate Laboratory, 4710-057/4805-017, Braga/Guimarães, Portugal
- Stemmatters, Biotecnologia e Medicina Regenerativa SA, 4805-017, Guimarães, Portugal
| | - R.A. Sousa
- Stemmatters, Biotecnologia e Medicina Regenerativa SA, 4805-017, Guimarães, Portugal
| | - A.J. Salgado
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
- ICVS/3B's—PT Government Associate Laboratory, 4710-057/4805-017, Braga/Guimarães, Portugal
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21
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Huang F, Chen T, Chang J, Zhang C, Liao F, Wu L, Wang W, Yin Z. A conductive dual-network hydrogel composed of oxidized dextran and hyaluronic-hydrazide as BDNF delivery systems for potential spinal cord injury repair. Int J Biol Macromol 2020; 167:434-445. [PMID: 33278434 DOI: 10.1016/j.ijbiomac.2020.11.206] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 11/27/2020] [Accepted: 11/29/2020] [Indexed: 12/17/2022]
Abstract
Spinal cord injury (SCI) often causes neuronal death and axonal degeneration. In this study, we report a new strategy for preparing injectable and conductive polysaccharides-based hydrogels that could sustainably deliver brain-derived neurotrophic factor (BDNF) for SCI repair. We used poly(lactic-co-glycolic acid) (PLGA) as a carrier to encapsulate BDNF. The resulting microspheres were then modified with tannic acid (TA). The polysaccharides-based hydrogel composed of oxidized dextran (Dex) and hyaluronic acid-hydrazide (HA) was mixed with TA-modified microspheres to form the ultimate BDNF@TA-PLGA/Dex-HA hydrogel. Our results showed that the hydrogel had properties similar to natural spinal cords. Specifically, the hydrogel had soft mechanical properties and high electrical conductivity. The cross-sectional morphology of the hydrogel exhibited a continuous and porous structure. The swelling and degradation behaviors of the Dex-HA hydrogel in vitro indicated the incorporation of TA into hydrogel matrix could improve the stability of the hydrogel matrix as well as extend the release time of BDNF from the matrix. Furthermore, results from immunostaining and real-time PCR demonstrated that BDNF@TA-PLGA/Dex-HA hydrogel could promote the differentiation of neural stem cells (NSCs) into neurons and inhibit astrocyte differentiation in vitro. These results show the great potential of this hydrogel as a biomimetic material in SCI regeneration.
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Affiliation(s)
- Fei Huang
- Department of Orthopaedics, The Fourth Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Taiying Chen
- Department of Liver Transplantation, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, Guangdong, China
| | - Jun Chang
- Department of Orthopaedics, The Fourth Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Chi Zhang
- Department of Orthopaedics, The Fourth Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Faxue Liao
- Department of Orthopaedics, The Fourth Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Linwei Wu
- Department of Liver Transplantation, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, School of Medicine, South China University of Technology, Guangzhou, Guangdong, China.
| | - Wenbin Wang
- Department of General Surgery, The Fourth Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.
| | - Zongsheng Yin
- Department of Orthopaedics, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.
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22
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Mukherjee N, Adak A, Ghosh S. Recent trends in the development of peptide and protein-based hydrogel therapeutics for the healing of CNS injury. SOFT MATTER 2020; 16:10046-10064. [PMID: 32724981 DOI: 10.1039/d0sm00885k] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Traumatic brain injury (TBI) and spinal cord injury (SCI) cause millions of deaths and permanent or prolonged physical disabilities around the globe every year. It generally happens due to various incidents, such as accidents during sports, war, physical assault, and strokes which result in severe damage to brain and spinal cord. If this remains untreated, traumatic CNS injuries may lead to early development of several neurodegenerative diseases like Alzheimer's, Parkinson, multiple sclerosis, and other mental illnesses. The initial physical reaction, which is also termed as the primary phase, includes swelling, followed by inflammation as a result of internal haemorrhage causing damage to indigenous tissue, i.e., axonal shear injury, rupture of blood vessels, and partial impaired supply of oxygen and essential nutrients in the neurons, thereby initiating a cascade of events causing secondary injuries such as hypoxia, hypotension, cognitive impairment, seizures, imbalanced calcium homeostasis and glutamate-induced excitotoxicity resulting in concomitant neuronal cell death and cumulative permanent tissue damage. In the modern era of advanced biomedical technology, we are still living with scarcity of the clinically applicable comparative non-invasive therapeutic strategies for regeneration or functional recovery of neurons or neural networks after a massive CNS injury. One of the key reasons for this scarcity is the limited regenerative ability of neurons in CNS. Growth-impermissive glial scar and the lack of a synthetic biocompatible platform for proper neural tissue engineering and controlled supply of drugs further retard the healing process. Injectable or implantable hydrogel materials, consisting majorly of water in its porous three-dimensional (3D) structure, can serve as an excellent drug delivery platform as well as a transplanted cell-supporting scaffold medium. Among the various neuro-compatible bioinspired materials, we are limiting our discussion to the recent advancement of engineered biomaterials comprising mainly of peptides and proteins due to their growing demand, low immunogenicity and versatility in the fabrication of neuro regenerative medicine. In this article, we try to explore all the recent scientific avenues that are developing gradually to make peptide and peptide-conjugated biomaterial hydrogels as a therapeutic and supporting scaffold for treating CNS injuries.
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Affiliation(s)
- Nabanita Mukherjee
- Department of Bioscience & Bioengineering, Indian Institute of Technology Jodhpur, NH 65, Surpura Bypass Road, Karwar, Rajasthan 342037, India.
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23
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McCrorie P, Mistry J, Taresco V, Lovato T, Fay M, Ward I, Ritchie AA, Clarke PA, Smith SJ, Marlow M, Rahman R. Etoposide and olaparib polymer-coated nanoparticles within a bioadhesive sprayable hydrogel for post-surgical localised delivery to brain tumours. Eur J Pharm Biopharm 2020; 157:108-120. [PMID: 33068736 DOI: 10.1016/j.ejpb.2020.10.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 10/07/2020] [Accepted: 10/11/2020] [Indexed: 02/09/2023]
Abstract
Glioblastoma is a malignant brain tumour with a median survival of 14.6 months from diagnosis. Despite maximal surgical resection and concurrent chemoradiotherapy, reoccurrence is inevitable. To try combating the disease at a stage of low residual tumour burden immediately post-surgery, we propose a localised drug delivery system comprising of a spray device, bioadhesive hydrogel (pectin) and drug nanocrystals coated with polylactic acid-polyethylene glycol (NCPPs), to be administered directly into brain parenchyma adjacent to the surgical cavity. We have repurposed pectin for use within the brain, showing in vitro and in vivo biocompatibility, bio-adhesion to mammalian brain and gelling at physiological brain calcium concentrations. Etoposide and olaparib NCPPs with high drug loading have shown in vitro stability and drug release over 120 h. Pluronic F127 stabilised NCPPs to ensure successful spraying, as determined by dynamic light scattering and transmission electron microscopy. Successful delivery of Cy5-labelled NCPPs was demonstrated in a large ex vivo mammalian brain, with NCPP present in the tissue surrounding the resection cavity. Our data collectively demonstrates the pre-clinical development of a novel localised delivery device based on a sprayable hydrogel containing therapeutic NCPPs, amenable for translation to intracranial surgical resection models for the treatment of malignant brain tumours.
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Affiliation(s)
- Phoebe McCrorie
- Children's Brain Tumour Research Centre, Biodiscovery Institute, School of Medicine, University of Nottingham, NG7 2RD, UK
| | - Jatin Mistry
- Division of Advanced Materials and Healthcare Technologies, School of Pharmacy, University of Nottingham, NG7 2RD, UK
| | - Vincenzo Taresco
- Division of Advanced Materials and Healthcare Technologies, School of Pharmacy, University of Nottingham, NG7 2RD, UK
| | - Tatiana Lovato
- Division of Advanced Materials and Healthcare Technologies, School of Pharmacy, University of Nottingham, NG7 2RD, UK
| | - Michael Fay
- Division of Advanced Materials and Healthcare Technologies, School of Pharmacy, University of Nottingham, NG7 2RD, UK
| | - Ian Ward
- School of Life Sciences Imaging, School of Life Sciences, University of Nottingham, NG7 2RD, UK
| | - Alison A Ritchie
- Division of Cancer and Stem Cells, Faculty of Medicine and Health Sciences, University of Nottingham, NG7 2RD, UK
| | - Philip A Clarke
- Division of Cancer and Stem Cells, Faculty of Medicine and Health Sciences, University of Nottingham, NG7 2RD, UK
| | - Stuart J Smith
- Children's Brain Tumour Research Centre, Biodiscovery Institute, School of Medicine, University of Nottingham, NG7 2RD, UK
| | - Maria Marlow
- Division of Advanced Materials and Healthcare Technologies, School of Pharmacy, University of Nottingham, NG7 2RD, UK.
| | - Ruman Rahman
- Children's Brain Tumour Research Centre, Biodiscovery Institute, School of Medicine, University of Nottingham, NG7 2RD, UK.
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Hosseinzadeh S, Lindsay SL, Gallagher AG, Wellings DA, Riehle MO, Riddell JS, Barnett SC. A novel poly-ε-lysine based implant, Proliferate®, for promotion of CNS repair following spinal cord injury. Biomater Sci 2020; 8:3611-3627. [PMID: 32515439 DOI: 10.1039/d0bm00097c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The limited regenerative capacity of the CNS poses formidable challenges to the repair of spinal cord injury (SCI). Two key barriers to repair are (i) the physical gap left by the injury, and (ii) the inhibitory milieu surrounding the injury, the glial scar. Biomaterial implantation into the injury site can fill the cavity, provide a substrate for cell migration, and potentially attenuate the glial scar. We investigated the biological viability of a biocompatible and biodegradable poly-ε-lysine based biomaterial, Proliferate®, in low and high cross-linked forms and when coated with IKVAV peptide, for SCI implantation. We demonstrate altered astrocyte morphology and nestin expression on Proliferate® compared to conventional glass cell coverslips suggesting a less reactive phenotype. Moreover Proliferate® supported myelination in vitro, with myelination observed sooner on IKVAV-coated constructs compared with uncoated Proliferate®, and delayed overall compared with maintenance on glass coverslips. For in vivo implantation, parallel-aligned channels were fabricated into Proliferate® to provide cell guidance cues. Extensive vascularisation and cellular infiltration were observed in constructs implanted in vivo, along with an astrocyte border and microglial response. Axonal ingrowth was observed at the construct border and inside implants in intact channels. We conclude that Proliferate® is a promising biomaterial for implantation following SCI.
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Affiliation(s)
- Sara Hosseinzadeh
- Institute of Infection, Immunity and Inflammation, Sir Graeme Davies Building, 120 University Place, University of Glasgow, Glasgow G12 8TA, UK.
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Yang B, Zhang F, Cheng F, Ying L, Wang C, Shi K, Wang J, Xia K, Gong Z, Huang X, Yu C, Li F, Liang C, Chen Q. Strategies and prospects of effective neural circuits reconstruction after spinal cord injury. Cell Death Dis 2020; 11:439. [PMID: 32513969 PMCID: PMC7280216 DOI: 10.1038/s41419-020-2620-z] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 05/16/2020] [Accepted: 05/18/2020] [Indexed: 02/06/2023]
Abstract
Due to the disconnection of surviving neural elements after spinal cord injury (SCI), such patients had to suffer irreversible loss of motor or sensory function, and thereafter enormous economic and emotional burdens were brought to society and family. Despite many strategies being dealing with SCI, there is still no effective regenerative therapy. To date, significant progress has been made in studies of SCI repair strategies, including gene regulation of neural regeneration, cell or cell-derived exosomes and growth factors transplantation, repair of biomaterials, and neural signal stimulation. The pathophysiology of SCI is complex and multifaceted, and its mechanisms and processes are incompletely understood. Thus, combinatorial therapies have been demonstrated to be more effective, and lead to better neural circuits reconstruction and functional recovery. Combinations of biomaterials, stem cells, growth factors, drugs, and exosomes have been widely developed. However, simply achieving axon regeneration will not spontaneously lead to meaningful functional recovery. Therefore, the formation and remodeling of functional neural circuits also depend on rehabilitation exercises, such as exercise training, electrical stimulation (ES) and Brain-Computer Interfaces (BCIs). In this review, we summarize the recent progress in biological and engineering strategies for reconstructing neural circuits and promoting functional recovery after SCI, and emphasize current challenges and future directions.
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Affiliation(s)
- Biao Yang
- Department of Orthopedics Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, China
- Zhejiang Key Laboratory of Bone and Joint Precision and Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, 310009, China
| | - Feng Zhang
- Department of Orthopedics Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, China
- Zhejiang Key Laboratory of Bone and Joint Precision and Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, 310009, China
| | - Feng Cheng
- Department of Orthopedics Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, China
- Zhejiang Key Laboratory of Bone and Joint Precision and Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, 310009, China
| | - Liwei Ying
- Department of Orthopedics Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, China
- Zhejiang Key Laboratory of Bone and Joint Precision and Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, 310009, China
| | - Chenggui Wang
- Department of Orthopedics Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, China
- Zhejiang Key Laboratory of Bone and Joint Precision and Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, 310009, China
| | - Kesi Shi
- Department of Orthopedics Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, China
- Zhejiang Key Laboratory of Bone and Joint Precision and Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, 310009, China
| | - Jingkai Wang
- Department of Orthopedics Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, China
- Zhejiang Key Laboratory of Bone and Joint Precision and Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, 310009, China
| | - Kaishun Xia
- Department of Orthopedics Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, China
- Zhejiang Key Laboratory of Bone and Joint Precision and Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, 310009, China
| | - Zhe Gong
- Department of Orthopedics Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, China
- Zhejiang Key Laboratory of Bone and Joint Precision and Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, 310009, China
| | - Xianpeng Huang
- Department of Orthopedics Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, China
- Zhejiang Key Laboratory of Bone and Joint Precision and Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, 310009, China
| | - Cao Yu
- Department of Orthopedics Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, China
- Zhejiang Key Laboratory of Bone and Joint Precision and Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, 310009, China
| | - Fangcai Li
- Department of Orthopedics Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, China.
- Zhejiang Key Laboratory of Bone and Joint Precision and Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, 310009, China.
| | - Chengzhen Liang
- Department of Orthopedics Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, China.
- Zhejiang Key Laboratory of Bone and Joint Precision and Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, 310009, China.
| | - Qixin Chen
- Department of Orthopedics Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, 310009, Hangzhou, Zhejiang, China.
- Zhejiang Key Laboratory of Bone and Joint Precision and Department of Orthopedics Research Institute of Zhejiang University, Hangzhou, Zhejiang, 310009, China.
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Kim YK, Kim SY, Lee SH, Lee MH, Lee KB. Stabilized Loading of Hyaluronic Acid-Containing Hydrogels into Magnesium-Based Cannulated Screws. ACS Biomater Sci Eng 2019; 6:715-726. [PMID: 33463217 DOI: 10.1021/acsbiomaterials.9b01057] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Cannulated screws have a structure for inserting a guide wire inside them to effectively correct complicated fractures. Magnesium, an absorbable metal used to manufacture cannulated screws, may decompose in the body after a certain period of implantation. The hydrogel formed by hyaluronic acid (HA) and polygalacturonic acid (PGA) has been used into Mg-based cannulated screws to prevent bone resorption owing to the rapid corrosion of Mg with unfavorable mechanical properties and a high ambient pH. In addition, Ca ions were added to the gel for cross-linking the carboxyl groups to modify the gelation rate and physical properties of the gel. The developed hydrogels were injected into the Mg-based cannulated screws, after which they released HA and Ca. The possibility of the application of this system as a cannulated screw was evaluated based on the corrosion resistance, gel degradation rate, HA release, toxicity toward osteocytes, and experiments involving the implantation of the screws into the femurs of rats. Ca ions first bound to PGA and delayed the gelation time and dissolution rate. However, they interfered with HA binding and increased the elution of HA at the beginning of gel degradation. Ca(NO3)2 concentrations higher than 0.01 M and low pH environments inhibited osteoblast differentiation and proliferation, owing to the elution of HA from the hydrogel. On the other hand, when the HA hydrogel with a proper amount of Ca was inserted into a magnesium screw, the degradation of Mg was delayed, and the presence of the gel contributed to new bone formation and osteocyte expansion.
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Affiliation(s)
- Yu-Kyoung Kim
- Department of Dental Biomaterials and Institute of Biodegradable Materials, Institute of Oral Bioscience and School of Dentistry (Plus BK21 Program), Chonbuk National University, Jeon Ju 561-756, South Korea
| | - Seo-Young Kim
- Department of Dental Biomaterials and Institute of Biodegradable Materials, Institute of Oral Bioscience and School of Dentistry (Plus BK21 Program), Chonbuk National University, Jeon Ju 561-756, South Korea
| | - Se Hwan Lee
- Department of Orthopedic Surgery, Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital, Chonbuk National University Medical School, Jeon Ju 561-756, South Korea
| | - Min-Ho Lee
- Department of Dental Biomaterials and Institute of Biodegradable Materials, Institute of Oral Bioscience and School of Dentistry (Plus BK21 Program), Chonbuk National University, Jeon Ju 561-756, South Korea
| | - Kwang-Bok Lee
- Department of Orthopedic Surgery, Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute of Chonbuk National University Hospital, Chonbuk National University Medical School, Jeon Ju 561-756, South Korea
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Morgado PI, Palacios M, Larrain J. In situ injectable hydrogels for spinal cord regeneration: advances from the last 10 years. Biomed Phys Eng Express 2019; 6:012002. [PMID: 33438588 DOI: 10.1088/2057-1976/ab52e8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Spinal cord injury (SCI) is a tremendously devastating disorder with no effective therapy. Neuroprotective strategies have been applied aiming to prevent secondary cell death but no successful and robust effects have been observed. Recently, combinatorial approaches using biomaterials with cells and/or growth factors have demonstrated promising therapeutic effects because of the improvement of axonal growth and in vivo functional recovery in model organisms. In situ injectable hydrogels are a particularly attractive neuroregenerative approach to improve spinal cord repair and regeneration since they can be precisely injected into the lesion site filling the space prior to gelification, decrease scarring and promote axon growth due to the hydrogel's soft structure. Important advances regarding the use of hydrogels as potential therapeutic approaches has been reported during the last 10 years. Injectable alginate hydrogel loaded with GDNF, thermoresponsives heparin-poloxamer loaded with NGF and imidazole-poly(organophosphazenes) hydrogels are just three examples of biomaterials that can promote neurite, axon growth and improve functional recovery in hemisected and resected rats. Here we will review the status of in situ injectable hydrogels for spinal cord regeneration with special focus in the advantages of using hydrogel scaffolds, the ideal polymers to be used, the gelification process and the cells or growth factors combined. The in vitro and in vivo results reported for those biomaterials will be presented, compared and discussed.
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Zhang Q, Shi B, Ding J, Yan L, Thawani JP, Fu C, Chen X. Polymer scaffolds facilitate spinal cord injury repair. Acta Biomater 2019; 88:57-77. [PMID: 30710714 DOI: 10.1016/j.actbio.2019.01.056] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 01/10/2019] [Accepted: 01/28/2019] [Indexed: 12/23/2022]
Abstract
During the past decades, improving patient neurological recovery following spinal cord injury (SCI) has remained a challenge. An effective treatment for SCI would not only reduce fractured elements and isolate developing local glial scars to promote axonal regeneration but also ameliorate secondary effects, including inflammation, apoptosis, and necrosis. Three-dimensional (3D) scaffolds provide a platform in which these mechanisms can be addressed in a controlled manner. Polymer scaffolds with favorable biocompatibility and appropriate mechanical properties have been engineered to minimize cicatrization, customize drug release, and ensure an unobstructed space to promote cell growth and differentiation. These properties make polymer scaffolds an important potential therapeutic platform. This review highlights the recent developments in polymer scaffolds for SCI engineering. STATEMENT OF SIGNIFICANCE: How to improve the efficacy of neurological recovery after spinal cord injury (SCI) is always a challenge. Tissue engineering provides a promising strategy for SCI repair, and scaffolds are one of the most important elements in addition to cells and inducing factors. The review highlights recent development and future prospects in polymer scaffolds for SCI therapy. The review will guide future studies by outlining the requirements and characteristics of polymer scaffold technologies employed against SCI. Additionally, the peculiar properties of polymer materials used in the therapeutic process of SCI also have guiding significance to other tissue engineering approaches.
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Qin C, Zhou J, Zhang Z, Chen W, Hu Q, Wang Y. Convenient one-step approach based on stimuli-responsive sol-gel transition properties to directly build chitosan-alginate core-shell beads. Food Hydrocoll 2019. [DOI: 10.1016/j.foodhyd.2018.08.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Zhao H, Xu K, Zhu P, Wang C, Chi Q. Smart hydrogels with high tunability of stiffness as a biomimetic cell carrier. Cell Biol Int 2019; 43:84-97. [DOI: 10.1002/cbin.11091] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Accepted: 12/23/2018] [Indexed: 12/23/2022]
Affiliation(s)
- Han Zhao
- Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences; University of Science and Technology of China; Hefei China
| | - Kang Xu
- Department of Cardiovascular Surgery; Union Hospital; Tongji Medical College, Huazhong University of Science and Technology; Wuhan China
| | - Peng Zhu
- Department of Cardiovascular Surgery; Union Hospital; Tongji Medical College, Huazhong University of Science and Technology; Wuhan China
| | - Chunli Wang
- “111 ” Project Laboratory of Biomechanics and Tissue Repair; Bioengineering College; Chongqing University; Chongqing China
| | - Qingjia Chi
- Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics; Department of Mechanics and Engineering Structure; Wuhan University of Technology; Wuhan China
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Zuidema JM, Gilbert RJ, Gottipati MK. Biomaterial Approaches to Modulate Reactive Astroglial Response. Cells Tissues Organs 2018; 205:372-395. [PMID: 30517922 PMCID: PMC6397084 DOI: 10.1159/000494667] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 10/18/2018] [Indexed: 11/19/2022] Open
Abstract
Over several decades, biomaterial scientists have developed materials to spur axonal regeneration and limit secondary injury and tested these materials within preclinical animal models. Rarely, though, are astrocytes examined comprehensively when biomaterials are placed into the injury site. Astrocytes support neuronal function in the central nervous system. Following an injury, astrocytes undergo reactive gliosis and create a glial scar. The astrocytic glial scar forms a dense barrier which restricts the extension of regenerating axons through the injury site. However, there are several beneficial effects of the glial scar, including helping to reform the blood-brain barrier, limiting the extent of secondary injury, and supporting the health of regenerating axons near the injury site. This review provides a brief introduction to the role of astrocytes in the spinal cord, discusses astrocyte phenotypic changes that occur following injury, and highlights studies that explored astrocyte changes in response to biomaterials tested within in vitro or in vivo environments. Overall, we suggest that in order to improve biomaterial designs for spinal cord injury applications, investigators should more thoroughly consider the astrocyte response to such designs.
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Affiliation(s)
- Jonathan M Zuidema
- Department of Chemistry and Biochemistry, University of California, San Diego, California, USA
| | - Ryan J Gilbert
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York, USA
- Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York, USA
| | - Manoj K Gottipati
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York, USA,
- Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York, USA,
- Center for Brain and Spinal Cord Repair, Department of Neuroscience, The Ohio State University, Columbus, Ohio, USA,
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Deng S, Li X, Yang W, He K, Ye X. Injectable in situ cross-linking hyaluronic acid/carboxymethyl cellulose based hydrogels for drug release. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2018; 29:1643-1655. [PMID: 29793378 DOI: 10.1080/09205063.2018.1481005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A series of injectable in situ cross-linking hyaluronic acid/carboxymethyl cellulose based hydrogels (HA/CMC) was prepared via disulfide bonds by the oxidation of dissolved oxygen. The results showed that HA/CMC hydrogels exhibited tunable gelling time, appropriate rheology properties, high swelling ratio, good stability, and sustained drug release ability. The gelling time of HA/CMC hydrogels ranged from 1.4 to 7.0 min, and the values of the storage modulus, complex shear modulus, dynamic viscosity, and yield stress of HA3/CMC3 hydrogel were about 5869 Pa, 5870 Pa, 587 Pa·s, and 1969 Pa, respectively. The degradation percentage of HA1/CMC1, HA2/CMC2, and HA3/CMC3 hydrogels were about 60, 49, and 41% after incubating 42 days, and the in vitro cumulative release percentage of BSA from HA1/CMC1, HA2/CMC2, and HA3/CMC3 drug-loaded hydrogels were about 99, 91, and 82% after 30 days. The series of injectable in situ cross-linking HA/CMC hydrogels exhibited good comprehensive performance, signifying that these hydrogels could be potentially used in the fields of short- and medium-term controlled drug release, cell encapsulation, regenerative medicine, and tissue engineering.
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Affiliation(s)
- Shuang Deng
- a School of Materials Science and Engineering , Southwest University of Science and Technology , Mianyang , P. R. China
| | - Xian Li
- a School of Materials Science and Engineering , Southwest University of Science and Technology , Mianyang , P. R. China
| | - Wangkai Yang
- a School of Materials Science and Engineering , Southwest University of Science and Technology , Mianyang , P. R. China
| | - Kewen He
- a School of Materials Science and Engineering , Southwest University of Science and Technology , Mianyang , P. R. China
| | - Xu Ye
- a School of Materials Science and Engineering , Southwest University of Science and Technology , Mianyang , P. R. China
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Medelin M, Porrelli D, Aurand ER, Scaini D, Travan A, Borgogna MA, Cok M, Donati I, Marsich E, Scopa C, Scardigli R, Paoletti S, Ballerini L. Exploiting natural polysaccharides to enhance in vitro bio-constructs of primary neurons and progenitor cells. Acta Biomater 2018; 73:285-301. [PMID: 29621637 DOI: 10.1016/j.actbio.2018.03.041] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 02/23/2018] [Accepted: 03/26/2018] [Indexed: 01/09/2023]
Abstract
Current strategies in Central Nervous System (CNS) repair focus on the engineering of artificial scaffolds for guiding and promoting neuronal tissue regrowth. Ideally, one should combine such synthetic structures with stem cell therapies, encapsulating progenitor cells and instructing their differentiation and growth. We used developments in the design, synthesis, and characterization of polysaccharide-based bioactive polymeric materials for testing the ideal composite supporting neuronal network growth, synapse formation and stem cell differentiation into neurons and motor neurons. Moreover, we investigated the feasibility of combining these approaches with engineered mesenchymal stem cells able to release neurotrophic factors. We show here that composite bio-constructs made of Chitlac, a Chitosan derivative, favor hippocampal neuronal growth, synapse formation and the differentiation of progenitors into the proper neuronal lineage, that can be improved by local and continuous delivery of neurotrophins. STATEMENT OF SIGNIFICANCE In our work, we characterized polysaccharide-based bioactive platforms as biocompatible materials for nerve tissue engineering. We show that Chitlac-thick substrates are able to promote neuronal growth, differentiation, maturation and formation of active synapses. These observations support this new material as a promising candidate for the development of complex bio-constructs promoting central nervous system regeneration. Our novel findings sustain the exploitation of polysaccharide-based scaffolds able to favour neuronal network reconstruction. Our study shows that Chitlac-thick may be an ideal candidate for the design of biomaterial scaffolds enriched with stem cell therapies as an innovative approach for central nervous system repair.
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Biomaterial Scaffolds in Regenerative Therapy of the Central Nervous System. BIOMED RESEARCH INTERNATIONAL 2018; 2018:7848901. [PMID: 29805977 PMCID: PMC5899851 DOI: 10.1155/2018/7848901] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Revised: 02/18/2018] [Accepted: 02/21/2018] [Indexed: 02/08/2023]
Abstract
The central nervous system (CNS) is the most important section of the nervous system as it regulates the function of various organs. Injury to the CNS causes impairment of neurological functions in corresponding sites and further leads to long-term patient disability. CNS regeneration is difficult because of its poor response to treatment and, to date, no effective therapies have been found to rectify CNS injuries. Biomaterial scaffolds have been applied with promising results in regeneration medicine. They also show great potential in CNS regeneration for tissue repair and functional recovery. Biomaterial scaffolds are applied in CNS regeneration predominantly as hydrogels and biodegradable scaffolds. They can act as cellular supportive scaffolds to facilitate cell infiltration and proliferation. They can also be combined with cell therapy to repair CNS injury. This review discusses the categories and progression of the biomaterial scaffolds that are applied in CNS regeneration.
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Non-functionalized soft alginate hydrogel promotes locomotor recovery after spinal cord injury in a rat hemimyelonectomy model. Acta Neurochir (Wien) 2018; 160:449-457. [PMID: 29230560 DOI: 10.1007/s00701-017-3389-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 10/31/2017] [Indexed: 12/29/2022]
Abstract
BACKGROUND Spinal cord injury (SCI) and the consecutive devastating neurological sequelae have an enormous individual and economic impact. Implantation of functionalized hydrogels is a promising approach, because they can serve as a matrix for the regenerating tissue, carry and release bioactive molecules and various cell types. We already demonstrated that non-functionalized soft alginate hydrogel supported axonal outgrowth and protected neurons against oxidative stress in vitro. Here, we investigated the effects of such soft alginate hydrogels on locomotor recovery in small and large spinal cord lesions. METHOD Hemimyelonectomy of 2 mm or 4 mm length was performed in rats and soft alginate hydrogel was implanted. Functional recovery of the hindlimbs was assessed in the open field [Batto Beattie Bresnahan (BBB) score] and using swimming test [Louisville Swim score (LSS)] for 140 days post injury (DPI). Reference histology was performed. RESULTS Rats that received an alginate implant into 2 mm spinal cord lesions demonstrated significantly improved locomotor recovery compared to controls detectable already at 10 DPI. At 140 DPI, they reached higher LSS and BBB scores in swimming and open field tests, respectively. However, this beneficial effect of alginate was lacking in animals with larger (4 mm) lesions. Histological examination suggested that fibrous scarring in the spinal cord was reduced after alginate implantation in comparison to controls. CONCLUSIONS Implantation of soft alginate hydrogel in small spinal cord lesions improved functional recovery. Possible underlying mechanisms include the mechanical stabilization of the wound, reduction of secondary damage and inhibition of fibrous scarring.
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Ham TR, Leipzig ND. Biomaterial strategies for limiting the impact of secondary events following spinal cord injury. Biomed Mater 2018; 13:024105. [PMID: 29155409 PMCID: PMC5824690 DOI: 10.1088/1748-605x/aa9bbb] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The nature of traumatic spinal cord injury (SCI) often involves limited recovery and long-term quality of life complications. The initial injury sets off a variety of secondary cascades, which result in an expanded lesion area. Ultimately, the native tissue fails to regenerate. As treatments are developed in the laboratory, the management of this secondary cascade is an important first step in achieving recovery of normal function. Current literature identifies four broad targets for intervention: inflammation, oxidative stress, disruption of the blood-spinal cord barrier, and formation of an inhibitory glial scar. Because of the complex and interconnected nature of these events, strategies that combine multiple therapies together show much promise. Specifically, approaches that rely on biomaterials to perform a variety of functions are generating intense research interest. In this review, we examine each target and discuss how biomaterials are currently used to address them. Overall, we show that there are an impressive amount of biomaterials and combinatorial treatments which show good promise for slowing secondary events and improving outcomes. If more emphasis is placed on growing our understanding of how materials can manage secondary events, treatments for SCI can be designed in an increasingly rational manner, ultimately improving their potential for translation to the clinic.
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Affiliation(s)
- Trevor R Ham
- Department of Biomedical Engineering, Auburn Science and Engineering Center 275, West Tower, University of Akron, Akron, OH 44325-3908, United States of America
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Ziemba AM, Gilbert RJ. Biomaterials for Local, Controlled Drug Delivery to the Injured Spinal Cord. Front Pharmacol 2017; 8:245. [PMID: 28539887 PMCID: PMC5423911 DOI: 10.3389/fphar.2017.00245] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 04/19/2017] [Indexed: 11/13/2022] Open
Abstract
Affecting approximately 17,000 new people each year, spinal cord injury (SCI) is a devastating injury that leads to permanent paraplegia or tetraplegia. Current pharmacological approaches are limited in their ability to ameliorate this injury pathophysiology, as many are not delivered locally, for a sustained duration, or at the correct injury time point. With this review, we aim to communicate the importance of combinatorial biomaterial and pharmacological approaches that target certain aspects of the dynamically changing pathophysiology of SCI. After reviewing the pathophysiology timeline, we present experimental biomaterial approaches to provide local sustained doses of drug. In this review, we present studies using a variety of biomaterials, including hydrogels, particles, and fibers/conduits for drug delivery. Subsequently, we discuss how each may be manipulated to optimize drug release during a specific time frame following SCI. Developing polymer biomaterials that can effectively release drug to target specific aspects of SCI pathophysiology will result in more efficacious approaches leading to better regeneration and recovery following SCI.
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Affiliation(s)
| | - Ryan J. Gilbert
- Department of Biomedical Engineering and Center for Biotechnology and Interdisciplinary Sciences, Rensselaer Polytechnic Institute, TroyNY, USA
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Shen Y, Li X, Huang Y, Chang G, Cao K, Yang J, Zhang R, Sheng X, Ye X. pH and redox dual stimuli-responsive injectable hydrogels based on carboxymethyl cellulose derivatives. Macromol Res 2016. [DOI: 10.1007/s13233-016-4077-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Liu D, Jiang T, Cai W, Chen J, Zhang H, Hietala S, Santos HA, Yin G, Fan J. An In Situ Gelling Drug Delivery System for Improved Recovery after Spinal Cord Injury. Adv Healthc Mater 2016; 5:1513-21. [PMID: 27113454 DOI: 10.1002/adhm.201600055] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Revised: 03/02/2016] [Indexed: 12/11/2022]
Abstract
Therapeutic strategies for the spinal cord injury (SCI) are limited by the current available drug delivery techniques. Here, an in situ gelling drug delivery system (DDS), composed of a Poloxamer-407, a 188 mixture-based thermoresponsive hydrogel matrix and, an incorporated therapeutic compound (monosialoganglioside, GM1), is developed for SCI therapy. A low-thoracic hemisection in rats is used as SCI model to evaluate therapeutic efficiency. The GM1-incorporating Poloxamer-407 and 188 polymer solution is converted to a hydrogel (GM1-hydrogel) upon instillation to the injured spinal cord, due to the increased temperature. At body temperature, the thermoresponsive hydrogel prolongs the release of GM1 for about 1 month, due to the superposition of dissolution and swelling (anomalous transport) of the hydrogel matrix. The sustained release of the GM1-hydrogel enables the prolonged residence time of GM1 at the injured spinal cord, decreases the frequency of administration and, consequently, may improve patient compliance. After SCI, the administration of GM1-hydrogel to the lesion site inhibits the apoptotic cell death and glial scar formation, enhances the neuron regeneration, provides neuroprotection to the injured spinal cord, and improves the locomotor recovery. Overall, this study opens future perspectives for the treatment of SCI with a prolonged drug release DDS.
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Affiliation(s)
- Dongfei Liu
- Division of Pharmaceutical Chemistry and Technology Faculty of Pharmacy University of Helsinki FI‐00014 Helsinki Finland
| | - Tao Jiang
- Department of Orthopaedics The First Affiliated Hospital of Nanjing Medical University Jiangsu 210029 China
| | - Weihua Cai
- Department of Orthopaedics The First Affiliated Hospital of Nanjing Medical University Jiangsu 210029 China
| | - Jian Chen
- Department of Orthopaedics The First Affiliated Hospital of Nanjing Medical University Jiangsu 210029 China
| | - Hongbo Zhang
- Division of Pharmaceutical Chemistry and Technology Faculty of Pharmacy University of Helsinki FI‐00014 Helsinki Finland
| | - Sami Hietala
- Laboratory of Polymer Chemistry Department of Chemistry University of Helsinki FI‐00014 Helsinki Finland
| | - Hélder A. Santos
- Division of Pharmaceutical Chemistry and Technology Faculty of Pharmacy University of Helsinki FI‐00014 Helsinki Finland
| | - Guoyong Yin
- Department of Orthopaedics The First Affiliated Hospital of Nanjing Medical University Jiangsu 210029 China
| | - Jin Fan
- Department of Orthopaedics The First Affiliated Hospital of Nanjing Medical University Jiangsu 210029 China
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Aminabhavi TM, Deshmukh AS. Polysaccharide-Based Hydrogels as Biomaterials. POLYMERIC HYDROGELS AS SMART BIOMATERIALS 2016. [DOI: 10.1007/978-3-319-25322-0_3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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Shahriari D, Koffler J, Lynam DA, Tuszynski MH, Sakamoto JS. Characterizing the degradation of alginate hydrogel for use in multilumen scaffolds for spinal cord repair. J Biomed Mater Res A 2015; 104:611-619. [DOI: 10.1002/jbm.a.35600] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Revised: 09/26/2015] [Accepted: 10/20/2015] [Indexed: 01/01/2023]
Affiliation(s)
- Dena Shahriari
- Department of Macromolecular Science and Engineering; University of Michigan, Ann Arbor; Michigan 48109
| | - Jacob Koffler
- Department of Neuroscience; University of California San Diego, La Jolla; California 92093
| | - Daniel A. Lynam
- Department of Chemical Engineering and Materials Science; Michigan State University; East Lansing Michigan 48824
| | - Mark H. Tuszynski
- Department of Neuroscience; University of California San Diego, La Jolla; California 92093
- Veterans Administration Medical Center, San Diego; California 92161
| | - Jeffrey S. Sakamoto
- Department of Mechanical Engineering; University of Michigan, Ann Arbor; Michigan 48109
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Biochemical Monitoring of Spinal Cord Injury by FT-IR Spectroscopy--Effects of Therapeutic Alginate Implant in Rat Models. PLoS One 2015; 10:e0142660. [PMID: 26559822 PMCID: PMC4641584 DOI: 10.1371/journal.pone.0142660] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 10/26/2015] [Indexed: 01/04/2023] Open
Abstract
Spinal cord injury (SCI) induces complex biochemical changes, which result in inhibition of nervous tissue regeneration abilities. In this study, Fourier-transform infrared (FT-IR) spectroscopy was applied to assess the outcomes of implants made of a novel type of non-functionalized soft calcium alginate hydrogel in a rat model of spinal cord hemisection (n = 28). Using FT-IR spectroscopic imaging, we evaluated the stability of the implants and the effects on morphology and biochemistry of the injured tissue one and six months after injury. A semi-quantitative evaluation of the distribution of lipids and collagen showed that alginate significantly reduced injury-induced demyelination of the contralateral white matter and fibrotic scarring in the chronic state after SCI. The spectral information enabled to detect and localize the alginate hydrogel at the lesion site and proved its long-term persistence in vivo. These findings demonstrate a positive impact of alginate hydrogel on recovery after SCI and prove FT-IR spectroscopic imaging as alternative method to evaluate and optimize future SCI repair strategies.
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Ren Z, Wang Y, Ma S, Duan S, Yang X, Gao P, Zhang X, Cai Q. Effective Bone Regeneration Using Thermosensitive Poly(N-Isopropylacrylamide) Grafted Gelatin as Injectable Carrier for Bone Mesenchymal Stem Cells. ACS APPLIED MATERIALS & INTERFACES 2015; 7:19006-19015. [PMID: 26266480 DOI: 10.1021/acsami.5b02821] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this study, thermosensitive poly(N-isopropylacrylamide) (PNIPAAm) was grafted onto gelatin via atom transfer radical polymerization (ATRP). The chemical structure of PNIPAAm-grafted gelatin (Gel-PNIPAAm) was confirmed by XPS, ATR-IR, and (1)H NMR characterizations. Gel-PNIPAAm aqueous solution exhibited sol-to-gel transformation at physiological temperature, and was studied as injectable hydrogel for bone defect regeneration in a cranial model. The hydrogel was biocompatible and demonstrated the ability to enhance bone regeneration in comparison with the untreated group (control). With the incorporation of rat bone mesenchymal stem cells (BMSCs) into the hydrogel, the bone regeneration rate was further significantly enhanced. As indicated by micro-CT, histological (H&E and Masson) and immunohistochemical (osteocalcin and osteopontin) staining, newly formed woven bone tissue was clearly detected at 12 weeks postimplantation in the hydrogel/BMSCs treated group, showing indistinguishable boundary with surrounding host bone tissues. The results suggested that the thermosensitive Gel-PNIPAAm hydrogel was an excellent injectable delivery vehicle of BMSCs for in vivo bone defect regeneration.
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Affiliation(s)
- Zhiwei Ren
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology , 100029 Beijing, China
| | - Yang Wang
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology , 100029 Beijing, China
| | - Shiqing Ma
- School and Hospital of Stomatology, Tianjin Medical University , 300070 Tianjin, China
| | - Shun Duan
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology , 100029 Beijing, China
| | - Xiaoping Yang
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology , 100029 Beijing, China
| | - Ping Gao
- School and Hospital of Stomatology, Tianjin Medical University , 300070 Tianjin, China
| | - Xu Zhang
- School and Hospital of Stomatology, Tianjin Medical University , 300070 Tianjin, China
| | - Qing Cai
- State Key Laboratory of Organic-Inorganic Composites, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology , 100029 Beijing, China
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Cheng C, Tang MC, Wu CS, Simon T, Ko FH. New Synthesis Route of Hydrogel through A Bioinspired Supramolecular Approach: Gelation, Binding Interaction, and in Vitro Dressing. ACS APPLIED MATERIALS & INTERFACES 2015; 7:19306-19315. [PMID: 26271338 DOI: 10.1021/acsami.5b05360] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Peptide-based supramolecular hydrogels have been comprehensively investigated in biomaterial applications because of their unique bioactivity, biofunctionality, and biocompatible features. However, the presence of organic building blocks in peptide-based hydrogels often results in low mechanical stability. To expand their practical use and range of applications, it is necessary to develop the tool kit available to prepare bioinspired, peptide-based supramolecular hydrogels with improved mechanical stability. In this paper, we present an innovative electrostatic and cross-linking approach in which naphthyl-Phe-Phe-Cys (NapFFC) oligopeptides are combined with gold nanoparticles (AuNPs) and calcium ions (Ca(2+)) to produce peptide-based supramolecular hydrogels. We further investigate the interactions among NapFFC, AuNPs and Ca(2+) by microscopy. The morphology of the nanofibrous network constructions and the binding forces exhibited from the hydrogel demonstrated that the combination of two mechanisms successfully enhanced the mechanical stability through the formation of a densely entangled fibrous network of peptide multimers that is attributed to the AuNP linkage and Ca(2+)-induced agglomeration. UV-vis spectrophotometry and fluorescence analysis were also used to demonstrate the enhanced stability of the hydrogel under various conditions such as thermal, solvent erosion, pH value and sonication. All results indicate that the presence of AuNPs and Ca(2+) can strengthen the prepared hydrogel by more than doubling the diameter of NapFFC nanofibers, enabling the formation of stronger frameworks and slowing the release of components. Further experiments confirmed that HeLa cells can grow on the bioinspired NapFFC-AuNP hydrogel and exhibit high cell viability and that these cells were killed on contact with a hydrogel containing a drug. Our peptide-based supramolecular hydrogels prepared from the observed electrostatic and cross-linking mechanisn exhibited a significantly improved mechanical stability, making them well suited to use as a drug carrier in hydrogel dressings and as extracellular materials (ECMs) for tissue engineering.
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Affiliation(s)
- Chieh Cheng
- Department of Materials Science and Engineering, National Chiao Tung University , 1001 University Road, Hsinchu, Taiwan 300, ROC
| | - Meng-Che Tang
- Department of Materials Science and Engineering, National Chiao Tung University , 1001 University Road, Hsinchu, Taiwan 300, ROC
| | - Chung-Shu Wu
- Department of Materials Science and Engineering, National Chiao Tung University , 1001 University Road, Hsinchu, Taiwan 300, ROC
| | - Turibius Simon
- Department of Materials Science and Engineering, National Chiao Tung University , 1001 University Road, Hsinchu, Taiwan 300, ROC
| | - Fu-Hsiang Ko
- Department of Materials Science and Engineering, National Chiao Tung University , 1001 University Road, Hsinchu, Taiwan 300, ROC
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45
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Hopkins AM, DeSimone E, Chwalek K, Kaplan DL. 3D in vitro modeling of the central nervous system. Prog Neurobiol 2015; 125:1-25. [PMID: 25461688 PMCID: PMC4324093 DOI: 10.1016/j.pneurobio.2014.11.003] [Citation(s) in RCA: 145] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2014] [Revised: 10/12/2014] [Accepted: 11/15/2014] [Indexed: 12/15/2022]
Abstract
There are currently more than 600 diseases characterized as affecting the central nervous system (CNS) which inflict neural damage. Unfortunately, few of these conditions have effective treatments available. Although significant efforts have been put into developing new therapeutics, drugs which were promising in the developmental phase have high attrition rates in late stage clinical trials. These failures could be circumvented if current 2D in vitro and in vivo models were improved. 3D, tissue-engineered in vitro systems can address this need and enhance clinical translation through two approaches: (1) bottom-up, and (2) top-down (developmental/regenerative) strategies to reproduce the structure and function of human tissues. Critical challenges remain including biomaterials capable of matching the mechanical properties and extracellular matrix (ECM) composition of neural tissues, compartmentalized scaffolds that support heterogeneous tissue architectures reflective of brain organization and structure, and robust functional assays for in vitro tissue validation. The unique design parameters defined by the complex physiology of the CNS for construction and validation of 3D in vitro neural systems are reviewed here.
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Affiliation(s)
- Amy M Hopkins
- Department of Biomedical Engineering, Tufts University, Science & Technology Center, 4 Colby Street, Medford, MA 02155, USA
| | - Elise DeSimone
- Department of Biomedical Engineering, Tufts University, Science & Technology Center, 4 Colby Street, Medford, MA 02155, USA
| | - Karolina Chwalek
- Department of Biomedical Engineering, Tufts University, Science & Technology Center, 4 Colby Street, Medford, MA 02155, USA
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Science & Technology Center, 4 Colby Street, Medford, MA 02155, USA.
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Potier J, Menuel S, Monflier E, Hapiot F. Synergetic Effect of Randomly Methylated β-Cyclodextrin and a Supramolecular Hydrogel in Rh-Catalyzed Hydroformylation of Higher Olefins. ACS Catal 2014. [DOI: 10.1021/cs5004883] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Jonathan Potier
- Université d’Artois, CNRS
UMR 8181, Unité de Catalyse et de Chimie
du Solide-UCCS UArtois, Faculté des Sciences Jean Perrin, rue Jean Souvraz, SP18, 62307 Lens Cedex, France
| | - Stéphane Menuel
- Université d’Artois, CNRS
UMR 8181, Unité de Catalyse et de Chimie
du Solide-UCCS UArtois, Faculté des Sciences Jean Perrin, rue Jean Souvraz, SP18, 62307 Lens Cedex, France
| | - Eric Monflier
- Université d’Artois, CNRS
UMR 8181, Unité de Catalyse et de Chimie
du Solide-UCCS UArtois, Faculté des Sciences Jean Perrin, rue Jean Souvraz, SP18, 62307 Lens Cedex, France
| | - Frédéric Hapiot
- Université d’Artois, CNRS
UMR 8181, Unité de Catalyse et de Chimie
du Solide-UCCS UArtois, Faculté des Sciences Jean Perrin, rue Jean Souvraz, SP18, 62307 Lens Cedex, France
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