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de Araújo RS, Mussalem MGVB, Carrijo GS, Bani JVDF, Ferreira LM. Adipose Tissue Derivatives in Peripheral Nerve Regeneration after Transection: A Systematic Review. Bioengineering (Basel) 2024; 11:697. [PMID: 39061779 PMCID: PMC11274242 DOI: 10.3390/bioengineering11070697] [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: 04/26/2024] [Revised: 06/08/2024] [Accepted: 06/28/2024] [Indexed: 07/28/2024] Open
Abstract
INTRODUCTION Peripheral nerve injury (PNI) is increasingly prevalent and challenging to treat despite advances in microsurgical techniques. In this context, adipose tissue derivatives, such as adipose-derived stem cells, nanofat, and stromal vascular fraction have been gaining attention as potential allies in peripheral nerve regeneration. OBJECTIVES This study aims to explore the use of adipose tissue derivatives in nerve regeneration following peripheral nerve transection in murine models. Thus, we assess and synthesize the key techniques and methods used for evaluating the obtained nerve regeneration to guide future experimental research and clinical interventions. METHODOLOGY A systematic review was conducted in February 2024, adhering to the Cochrane and PRISMA 2020 guidelines, using the PubMed, SciELO, and LILACS databases. The focus was on experimental studies involving adipose tissue derivatives in nerve regeneration in animal models post-transection. Only experimental trials reporting nerve regeneration outcomes were included; studies lacking a comparator group or evaluation methods were excluded. RESULTS Out of 273 studies initially identified from MEDLINE, 19 were selected for detailed analysis. The average study included 32.5 subjects, with about 10.2 subjects per intervention subgroup. The predominant model was the sciatic nerve injury with a 10 mm gap. The most common intervention involved unprocessed adipose-derived stem cells, utilized in 14 articles. CONCLUSIONS This review underscores the significant potential of current methodologies in peripheral nerve regeneration, particularly highlighting the use of murine models and thorough evaluation techniques.
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Affiliation(s)
- Rafael Silva de Araújo
- Federal University of São Paulo, Department of Plastic Surgery, São Paulo 04038-001, Brazil; (M.G.V.B.M.); (J.V.d.F.B.); (L.M.F.)
| | | | | | - João Victor de Figueiredo Bani
- Federal University of São Paulo, Department of Plastic Surgery, São Paulo 04038-001, Brazil; (M.G.V.B.M.); (J.V.d.F.B.); (L.M.F.)
| | - Lydia Masako Ferreira
- Federal University of São Paulo, Department of Plastic Surgery, São Paulo 04038-001, Brazil; (M.G.V.B.M.); (J.V.d.F.B.); (L.M.F.)
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Jacobs T, Mahoney C, Mohammed S, Ziccardi V. Evaluating Stromal Vascular Fraction As a Treatment for Peripheral Nerve Regeneration: A Scoping Review. J Oral Maxillofac Surg 2024; 82:771-781. [PMID: 38621666 DOI: 10.1016/j.joms.2024.03.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 03/05/2024] [Accepted: 03/21/2024] [Indexed: 04/17/2024]
Abstract
PURPOSE This study aims to investigate the potential of stromal vascular fraction (SVF) for peripheral nerve regeneration. METHODS A scoping review of Scopus and PubMed databases was conducted. Inclusion criteria were human or animal studies exploring the use of SVF for peripheral nerve regeneration. Studies were categorized by assessed outcomes: pain assessment, neural integrity, muscle recovery, and functional recovery. Level of evidence and study quality were assessed. RESULTS Nine studies met the inclusion criteria. SVF injection in humans with trigeminal neuropathic pain reduced pain scores from 7.5 ± 1.58 to 4.3 ± 3.28. SVF injection improved sensation in humans with leprosy neuropathy. Repairing transected rat sciatic nerves with SVF-coated nerve autografts improved wet muscle weight ratios (0.65 ± 0.11 vs 0.55 ± 0.06) and sciatic functional index (SFI) scores (-68.2 ± 9.2 vs -72.5 ± 8.9). Repairing transected rat sciatic nerves with SVF-coated conduits increased the ratio of gastrocnemius muscle weights (RGMW) (7-10% improvement), myelinated fibers (1,605 ± 806.2 vs 543.6 ± 478.66), and myelin thickness (5-20% increase). Repairing transected rat facial nerves with SVF-coated conduits improved whisker motion (9.22° ± 0.65° vs 1.90° ± 0.84°) and myelin thickness (0.57 μm ± 0.17 vs 0.45 μm ± 0.14 μm). Repairing transected rat sciatic nerves with SVF-coated nerve allografts improved RGMW (85 vs 50%), SFI scores (-20 to -10 vs -40 to -30), and Basso, Beatie, and Bresnahan locomotor scores (18 vs 15). All metrics mentioned above were statistically significant. The human studies were level 4 evidence due to being case series, while animal studies were the lowest level of evidence. CONCLUSION Despite initial promising results, the low-level evidence from the included studies warrants further investigation.
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Affiliation(s)
- Tyler Jacobs
- Resident, Department of Oral and Maxillofacial Surgery, Rutgers School of Dental Medicine, Newark, NJ.
| | | | - Saad Mohammed
- B.A. Candidate, New Jersey Institute of Technology, Newark, NJ
| | - Vincent Ziccardi
- Professor, Chair, and Associate Dean for Hospital Affairs, Department of Oral and Maxillofacial Surgery, Rutgers School of Dental Medicine, Newark, NJ
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Lopes B, Coelho A, Alvites R, Sousa AC, Sousa P, Moreira A, Atayde L, Salgado A, Geuna S, Maurício AC. Animal models in peripheral nerve transection studies: a systematic review on study design and outcomes assessment. Regen Med 2024; 19:189-203. [PMID: 37855207 DOI: 10.2217/rme-2023-0102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2023] Open
Abstract
Aim: Peripheral nerve injury regeneration studies using animal models are crucial to different pre-clinical therapeutic approaches efficacy evaluation whatever the surgical technique explored. Materials & methods: A 944 articles systematic review on 'peripheral nerve injury in animal models' over the last 9 years was carried out. Results: It was found that 91% used rodents, and only 9% employed large animals. Different nerves are studied, with generated gaps (10,78 mm) and methods applied for regeneration evaluation uniformed. Sciatic nerve was the most used (88%), followed by median and facial nerves (2.6%), significantly different. Conclusion: There has not been a significant scale-up of the in vivo testing to large animal models (anatomically/physiologically closer to humans), allowing an improvement in translational medicine for clinical cases.
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Affiliation(s)
- Bruna Lopes
- Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências, Tecnologias e Agroambiente da Universidade do Porto (ICETA), Rua D. Manuel II, Apartado 55142, Porto, 4051-401, Portugal
- Departamento de Clínicas Veterinárias, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto (UP), Rua de Jorge Viterbo Ferreira, No. 228, Porto, 4050-313, Portugal
- Associate Laboratory for Animal & Veterinary Science (AL4AnimalS), Lisboa, 1300-477, Portugal
| | - André Coelho
- Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências, Tecnologias e Agroambiente da Universidade do Porto (ICETA), Rua D. Manuel II, Apartado 55142, Porto, 4051-401, Portugal
- Departamento de Clínicas Veterinárias, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto (UP), Rua de Jorge Viterbo Ferreira, No. 228, Porto, 4050-313, Portugal
- Associate Laboratory for Animal & Veterinary Science (AL4AnimalS), Lisboa, 1300-477, Portugal
| | - Rui Alvites
- Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências, Tecnologias e Agroambiente da Universidade do Porto (ICETA), Rua D. Manuel II, Apartado 55142, Porto, 4051-401, Portugal
- Departamento de Clínicas Veterinárias, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto (UP), Rua de Jorge Viterbo Ferreira, No. 228, Porto, 4050-313, Portugal
- Associate Laboratory for Animal & Veterinary Science (AL4AnimalS), Lisboa, 1300-477, Portugal
- Instituto Universitário de Ciências da Saúde (CESPU), Avenida Central de Gandra 1317, Gandra, Paredes, 4585-116, Portugal
| | - Ana Catarina Sousa
- Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências, Tecnologias e Agroambiente da Universidade do Porto (ICETA), Rua D. Manuel II, Apartado 55142, Porto, 4051-401, Portugal
- Departamento de Clínicas Veterinárias, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto (UP), Rua de Jorge Viterbo Ferreira, No. 228, Porto, 4050-313, Portugal
- Associate Laboratory for Animal & Veterinary Science (AL4AnimalS), Lisboa, 1300-477, Portugal
| | - Patrícia Sousa
- Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências, Tecnologias e Agroambiente da Universidade do Porto (ICETA), Rua D. Manuel II, Apartado 55142, Porto, 4051-401, Portugal
- Departamento de Clínicas Veterinárias, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto (UP), Rua de Jorge Viterbo Ferreira, No. 228, Porto, 4050-313, Portugal
- Associate Laboratory for Animal & Veterinary Science (AL4AnimalS), Lisboa, 1300-477, Portugal
| | - Alícia Moreira
- Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências, Tecnologias e Agroambiente da Universidade do Porto (ICETA), Rua D. Manuel II, Apartado 55142, Porto, 4051-401, Portugal
- Departamento de Clínicas Veterinárias, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto (UP), Rua de Jorge Viterbo Ferreira, No. 228, Porto, 4050-313, Portugal
- Associate Laboratory for Animal & Veterinary Science (AL4AnimalS), Lisboa, 1300-477, Portugal
| | - Luís Atayde
- Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências, Tecnologias e Agroambiente da Universidade do Porto (ICETA), Rua D. Manuel II, Apartado 55142, Porto, 4051-401, Portugal
- Departamento de Clínicas Veterinárias, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto (UP), Rua de Jorge Viterbo Ferreira, No. 228, Porto, 4050-313, Portugal
- Associate Laboratory for Animal & Veterinary Science (AL4AnimalS), Lisboa, 1300-477, Portugal
| | - António Salgado
- Life & Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, Braga, Portugal
- ICVS/3B's e PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Stefano Geuna
- Department of Clinical & Biological Sciences, & Cavalieri Ottolenghi Neuroscience Institute, University of Turin, Ospedale San Luigi, Orbassano, Turin, 10043, Italy
| | - Ana Colette Maurício
- Centro de Estudos de Ciência Animal (CECA), Instituto de Ciências, Tecnologias e Agroambiente da Universidade do Porto (ICETA), Rua D. Manuel II, Apartado 55142, Porto, 4051-401, Portugal
- Departamento de Clínicas Veterinárias, Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto (UP), Rua de Jorge Viterbo Ferreira, No. 228, Porto, 4050-313, Portugal
- Associate Laboratory for Animal & Veterinary Science (AL4AnimalS), Lisboa, 1300-477, Portugal
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Bedar M, Saffari TM, Mathot F, Shin AY. Functional outcomes of nerve allografts augmented with mesenchymal stem cells and surgical angiogenesis in a rat sciatic nerve defect model. J Plast Reconstr Aesthet Surg 2023; 87:329-338. [PMID: 37925923 PMCID: PMC10842349 DOI: 10.1016/j.bjps.2023.10.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 08/22/2023] [Accepted: 10/07/2023] [Indexed: 11/07/2023]
Abstract
BACKGROUND Motor function recovery following acellular nerve allograft (ANA) repair remains inferior to autologous nerve reconstruction. We investigated the functional recovery of ANAs after combined mesenchymal stem cell (MSC) delivery and surgical angiogenesis in a rat sciatic nerve defect model. METHODS In 100 Lewis rats, unilateral sciatic nerve defects were reconstructed with (I) autografts, (II) ANAs, (III) ANAs wrapped with a superficial inferior epigastric artery fascial (SIEF) flap, combined with either (IV) undifferentiated MSCs or (V) Schwann cell-like differentiated MSCs. The tibialis anterior muscle area was evaluated during the survival period using ultrasonography. Functional recovery, histomorphometry, and immunofluorescence were assessed at 12 and 16 weeks. RESULTS At 12 weeks, the addition of surgical angiogenesis and MSCs improved ankle contractures. The SIEF flap also significantly improved compound muscle action potential (CMAP) outcomes compared with ANAs. Autografts outperformed all groups in muscle force and weight. At 16 weeks, ankle contractures of ANAs remained inferior to autografts and SIEF, whereas the CMAP amplitude was comparable between groups. The muscle force of autografts remained superior to all other groups, and the muscle weight of ANAs remained inferior to autografts. No differences were found in histomorphometry outcomes between SIEF groups and ANAs. Vascularity, determined by CD34 staining, was significantly higher in SIEF groups compared with ANAs. CONCLUSIONS The combination of surgical angiogenesis and MSCs did not result in a synergistic improvement in functional outcomes. In a short nerve gap model, the adipofascial flap may provide sufficient MSCs to ANAs without additional ex vivo MSC seeding.
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Affiliation(s)
- Meiwand Bedar
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA; Radboud University Medical Center, Radboud Institute for Health Sciences, Department of Plastic Surgery, Nijmegen, the Netherlands
| | - Tiam M Saffari
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA; Radboud University Medical Center, Radboud Institute for Health Sciences, Department of Plastic Surgery, Nijmegen, the Netherlands
| | - Femke Mathot
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA; Radboud University Medical Center, Radboud Institute for Health Sciences, Department of Plastic Surgery, Nijmegen, the Netherlands
| | - Alexander Y Shin
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN, USA.
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Borisov V, Gili Sole L, Reid G, Milan G, Hutter G, Grapow M, Eckstein FS, Isu G, Marsano A. Upscaled Skeletal Muscle Engineered Tissue with In Vivo Vascularization and Innervation Potential. Bioengineering (Basel) 2023; 10:800. [PMID: 37508827 PMCID: PMC10376693 DOI: 10.3390/bioengineering10070800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 06/13/2023] [Accepted: 06/21/2023] [Indexed: 07/30/2023] Open
Abstract
Engineering functional tissues of clinically relevant size (in mm-scale) in vitro is still a challenge in tissue engineering due to low oxygen diffusion and lack of vascularization. To address these limitations, a perfusion bioreactor was used to generate contractile engineered muscles of a 3 mm-thickness and a 8 mm-diameter. This study aimed to upscale the process to 50 mm in diameter by combining murine skeletal myoblasts (SkMbs) with human adipose-derived stromal vascular fraction (SVF) cells, providing high neuro-vascular potential in vivo. SkMbs were cultured on a type-I-collagen scaffold with (co-culture) or without (monoculture) SVF. Large-scale muscle-like tissue showed an increase in the maturation index over time (49.18 ± 1.63% and 76.63 ± 1.22%, at 9 and 11 days, respectively) and a similar force of contraction in mono- (43.4 ± 2.28 µN) or co-cultured (47.6 ± 4.7 µN) tissues. Four weeks after implantation in subcutaneous pockets of nude rats, the vessel length density within the constructs was significantly higher in SVF co-cultured tissues (5.03 ± 0.29 mm/mm2) compared to monocultured tissues (3.68 ± 0.32 mm/mm2) (p < 0.005). Although no mature neuromuscular junctions were present, nerve-like structures were predominantly observed in the engineered tissues co-cultured with SVF cells. This study demonstrates that SVF cells can support both in vivo vascularization and innervation of contractile muscle-like tissues, making significant progress towards clinical translation.
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Affiliation(s)
- Vladislav Borisov
- Laboratory of Cardiac Surgery and Engineering, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
- Cardiac Surgery, Department of Surgery, University Hospital Basel, 4031 Basel, Switzerland
| | - Laia Gili Sole
- Laboratory of Cardiac Surgery and Engineering, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
- Cardiac Surgery, Department of Surgery, University Hospital Basel, 4031 Basel, Switzerland
| | - Gregory Reid
- Laboratory of Cardiac Surgery and Engineering, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
- Cardiac Surgery, Department of Surgery, University Hospital Basel, 4031 Basel, Switzerland
| | - Giulia Milan
- Laboratory of Cardiac Surgery and Engineering, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
- Cardiac Surgery, Department of Surgery, University Hospital Basel, 4031 Basel, Switzerland
| | - Gregor Hutter
- Laboratory of Brain Tumor Immunotherapy, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
| | - Martin Grapow
- Cardiac Surgery, Department of Surgery, University Hospital Basel, 4031 Basel, Switzerland
| | - Friedrich Stefan Eckstein
- Laboratory of Cardiac Surgery and Engineering, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
- Cardiac Surgery, Department of Surgery, University Hospital Basel, 4031 Basel, Switzerland
| | - Giuseppe Isu
- Laboratory of Cardiac Surgery and Engineering, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
- Cardiac Surgery, Department of Surgery, University Hospital Basel, 4031 Basel, Switzerland
| | - Anna Marsano
- Laboratory of Cardiac Surgery and Engineering, Department of Biomedicine, University of Basel, 4031 Basel, Switzerland
- Cardiac Surgery, Department of Surgery, University Hospital Basel, 4031 Basel, Switzerland
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Valizadeh A, Asghari S, Bastani S, Sarvari R, Keyhanvar N, Razin SJ, Khiabani AY, Yousefi B, Yousefi M, Shoae-Hassani A, Mahmoodpoor A, Hamishehkar H, Tavakol S, Keshel SH, Nouri M, Seifalian AM, Keyhanvar P. Will stem cells from fat and growth factors from blood bring new hope to female patients with reproductive disorders? Reprod Biol 2021; 21:100472. [PMID: 33639342 DOI: 10.1016/j.repbio.2020.100472] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 11/21/2020] [Accepted: 12/06/2020] [Indexed: 01/05/2023]
Abstract
Female reproductive system disorders (FRSD) with or without infertility are prevalent women's health problems with a variety of treatment approaches including surgery and hormone therapy. It currently considering to sub-branch of regenerative medicine including stem cells or growth factors injection-based delivery treatment might be improved female reproductive health life. The most common products used for these patients treatment are autologous cell or platelet-based products from patients, including platelet-rich plasma, plasma rich in growth factor, platelet-rich fibrin, and stromal vascular fraction. In this review, we discuss each of the above products used in treatment of FRSD and critically evaluate the clinical outcome.
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Affiliation(s)
- Amir Valizadeh
- Stem Cell Research Center, Stem Cells and Regenerative Medicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran; Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Samira Asghari
- Hematology and Oncology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sepideh Bastani
- Stem Cell Research Center, Stem Cells and Regenerative Medicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Raana Sarvari
- Infectious and Tropical Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Neda Keyhanvar
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran; Gene Yakhteh Keyhan (Genik) Company (Ltd), Pharmaceutical Biotechnology Incubator, Tabriz University of Medical Sciences, Tabriz, Iran; ARTAN1100 Startup Accelerator, Tabriz, Iran
| | - Sepideh Jalilzadeh Razin
- Stem Cell Research Center, Stem Cells and Regenerative Medicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Alireza Yousefzadeh Khiabani
- Department of Epidemiology and Reproductive Health, Reproductive Epidemiology Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
| | - Bahman Yousefi
- Department of Clinical Biochemistry and Laboratory Medicine, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mehdi Yousefi
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Alireza Shoae-Hassani
- Stem Cell and Regenerative Medicine Research Center, Iran University of Medical Sciences, Tehran, Iran; Andam Baft Yakhteh (ABY) Company (Ltd), Tehran, Iran
| | - Ata Mahmoodpoor
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hamed Hamishehkar
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Shima Tavakol
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Saeed Heidari Keshel
- Medical Nanotechnology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Department of Tissue Engineering and Applied Cell Science, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Nouri
- Stem Cell Research Center, Stem Cells and Regenerative Medicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran; ARTAN1100 Startup Accelerator, Tabriz, Iran; Zist Andam Yakhteh Azerbaijan (ZAYA) Company (PHT), Medical Instrument Technology Incubator, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Alexander Marcus Seifalian
- Nanotechnology and Regenerative Medicine Commercialization Centre (Ltd), The London Innovation Bio Science Centre, London NW1 0NH, United Kingdom
| | - Peyman Keyhanvar
- Stem Cell Research Center, Stem Cells and Regenerative Medicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran; ARTAN1100 Startup Accelerator, Tabriz, Iran; Zist Andam Yakhteh Azerbaijan (ZAYA) Company (PHT), Medical Instrument Technology Incubator, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Medical Nanotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran; HealthNBICS Group, Convergence of Knowledge and Technology to the benefit of Society Network (CKTSN), Universal Scientific Education and Research Network (USERN), Tabriz, Iran.
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Zhang R, Rosen JM. The role of undifferentiated adipose-derived stem cells in peripheral nerve repair. Neural Regen Res 2018; 13:757-763. [PMID: 29862994 PMCID: PMC5998619 DOI: 10.4103/1673-5374.232457] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/09/2018] [Indexed: 12/12/2022] Open
Abstract
Peripheral nerve injuries impose significant health and economic consequences, yet no surgical repair can deliver a complete recovery of sensory or motor function. Traditional methods of repair are less than ideal: direct coaptation can only be performed when tension-free repair is possible, and transplantation of nerve autograft can cause donor-site morbidity and neuroma formation. Cell-based therapy delivered via nerve conduits has thus been explored as an alternative method of nerve repair in recent years. Stem cells are promising sources of the regenerative core material in a nerve conduit because stem cells are multipotent in function, abundant in supply, and more accessible than the myelinating Schwann cells. Among different types of stem cells, undifferentiated adipose-derived stem cell (uASC), which can be processed from adipose tissue in less than two hours, is a promising yet underexplored cell type. Studies of uASC have emerged in the past decade and have shown that autologous uASCs are non-immunogenic, easy to access, abundant in supply, and efficacious at promoting nerve regeneration. Two theories have been proposed as the primary regenerative mechanisms of uASC: in situ trans-differentiation towards Schwann cells, and secretion of trophic and anti-inflammatory factors. Future studies need to fully elucidate the mechanisms, side effects, and efficacy of uASC-based nerve regeneration so that uASCs can be utilized in clinical settings.
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Affiliation(s)
- Rui Zhang
- Dartmouth Geisel School of Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
| | - Joseph M. Rosen
- Dartmouth Geisel School of Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
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Gettler BC, Zakhari JS, Gandhi PS, Williams SK. Formation of Adipose Stromal Vascular Fraction Cell-Laden Spheroids Using a Three-Dimensional Bioprinter and Superhydrophobic Surfaces. Tissue Eng Part C Methods 2017; 23:516-524. [PMID: 28665236 DOI: 10.1089/ten.tec.2017.0056] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
The therapeutic infusion of adipose-derived stromal vascular fraction (SVF) cells for the treatment of multiple diseases, has progressed to numerous human clinical trials; however, the often poor retention of the cells following implantation remains a common drawback of direct cell injection. One solution to cellular retention at the injection site has been the use of biogels to encapsulate cells within a microenvironment before and upon implantation. The current study utilized three-dimensional bioprinting technology to evaluate the ability to form SVF cell-laden spheroids with collagen I as a gel-forming biomatrix. A superhydrophobic surface was created to maintain the bioprinted structures in a spheroid shape. A hydrophilic disc was printed onto the hydrophobic surface to immobilize the spheroids during the gelation process. Conditions for the automated rapid formation of SVF cell-laden spheroids were explored, including time/pressure relationships for spheroid extrusion during bioprinting. The formed spheroids maintain SVF viability in both static culture and dynamic spinner culture. Spheroids also undergo a time-dependent contraction with the retention of angiogenic sprout phenotype over the 14-day culture period. The use of a biphilic surface exhibiting both superhydrophobicity to maintain the spheroid shape and a hydrophilicity to immobilize the spheroid during gel formation produces SVF cell-laden spheroids that can be immediately transplanted for therapeutic applications.
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Affiliation(s)
- Brian C Gettler
- Cardiovascular Innovation Institute, University of Louisville , Louisville, Kentucky
| | - Joseph S Zakhari
- Cardiovascular Innovation Institute, University of Louisville , Louisville, Kentucky
| | - Piyani S Gandhi
- Cardiovascular Innovation Institute, University of Louisville , Louisville, Kentucky
| | - Stuart K Williams
- Cardiovascular Innovation Institute, University of Louisville , Louisville, Kentucky
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