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Bordett R, Danazumi KB, Wijekoon S, Garcia CJ, Abdulmalik S, Kumbar SG. Advancements in stimulation therapies for peripheral nerve regeneration. Biomed Mater 2024; 19:052008. [PMID: 39025114 DOI: 10.1088/1748-605x/ad651d] [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: 04/04/2024] [Accepted: 07/18/2024] [Indexed: 07/20/2024]
Abstract
Soft-tissue injuries affecting muscles, nerves, vasculature, tendons, and ligaments often diminish the quality of life due to pain, loss of function, and financial burdens. Both natural healing and surgical interventions can result in scarring, which potentially may impede functional recovery and lead to persistent pain. Scar tissue, characterized by a highly disorganized fibrotic extracellular matrix, may serve as a physical barrier to regeneration and drug delivery. While approaches such as drugs, biomaterials, cells, external stimulation, and other physical forces show promise in mitigating scarring and promoting regenerative healing, their implementation remains limited and challenging. Ultrasound, laser, electrical, and magnetic forms of external stimulation have been utilized to promote soft tissue as well as neural tissue regeneration. After stimulation, neural tissues experience increased proliferation of Schwann cells, secretion of neurotropic factors, production of myelin, and growth of vasculature, all aimed at supporting axon regeneration and innervation. Yet, the outcomes of healing vary depending on the pathophysiology of the damaged nerve, the timing of stimulation following injury, and the specific parameters of stimulation employed. Increased treatment intensity and duration have been noted to hinder the healing process by inducing tissue damage. These stimulation modalities, either alone or in combination with nerve guidance conduits and scaffolds, have been demonstrated to promote healing. However, the literature currently lacks a detailed understanding of the stimulation parameters used for nerve healing applications. In this article, we aim to address this gap by summarizing existing reports and providing an overview of stimulation parameters alongside their associated healing outcomes.
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Affiliation(s)
- Rosalie Bordett
- Department of Orthopedic Surgery, University of Connecticut Health, Farmington, CT, United States of America
| | - Khadija B Danazumi
- Department of Orthopedic Surgery, University of Connecticut Health, Farmington, CT, United States of America
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT, United States of America
| | - Suranji Wijekoon
- Department of Orthopedic Surgery, University of Connecticut Health, Farmington, CT, United States of America
| | - Christopher J Garcia
- Department of Orthopedic Surgery, University of Connecticut Health, Farmington, CT, United States of America
| | - Sama Abdulmalik
- Department of Orthopedic Surgery, University of Connecticut Health, Farmington, CT, United States of America
| | - Sangamesh G Kumbar
- Department of Orthopedic Surgery, University of Connecticut Health, Farmington, CT, United States of America
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT, United States of America
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT, United States of America
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Zia S, Pizzuti V, Paris F, Alviano F, Bonsi L, Zattoni A, Reschiglian P, Roda B, Marassi V. Emerging technologies for quality control of cell-based, advanced therapy medicinal products. J Pharm Biomed Anal 2024; 246:116182. [PMID: 38772202 DOI: 10.1016/j.jpba.2024.116182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 04/22/2024] [Accepted: 04/25/2024] [Indexed: 05/23/2024]
Abstract
Advanced therapy medicinal products (ATMP) are complex medicines based on gene therapy, somatic cell therapy, and tissue engineering. These products are rapidly arising as novel and promising therapies for a wide range of different clinical applications. The process for the development of well-established ATMPs is challenging. Many issues must be considered from raw material, manufacturing, safety, and pricing to assure the quality of ATMPs and their implementation as innovative therapeutic tools. Among ATMPs, cell-based ATMPs are drugs altogether. As for standard drugs, technologies for quality control, and non-invasive isolation and production of cell-based ATMPs are then needed to ensure their rapidly expanding applications and ameliorate safety and standardization of cell production. In this review, emerging approaches and technologies for quality control of innovative cell-based ATMPs are described. Among new techniques, microfluid-based systems show advantages related to their miniaturization, easy implementation in analytical process and automation which allow for the standardization of the final product.
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Affiliation(s)
| | - Valeria Pizzuti
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Bologna, Italy
| | - Francesca Paris
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Bologna, Italy
| | - Francesco Alviano
- Department of Biomedical and Neuromotor Sciences (DiBiNem), University of Bologna, Bologna, Italy
| | - Laura Bonsi
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Bologna, Italy
| | - Andrea Zattoni
- Stem Sel srl, Bologna, Italy; Department of Chemistry "G. Ciamician", University of Bologna, Bologna, Italy; National Institute of Biostructure and Biosystems (INBB), 00136 Rome, Italy
| | - Pierluigi Reschiglian
- Stem Sel srl, Bologna, Italy; Department of Chemistry "G. Ciamician", University of Bologna, Bologna, Italy; National Institute of Biostructure and Biosystems (INBB), 00136 Rome, Italy
| | - Barbara Roda
- Stem Sel srl, Bologna, Italy; Department of Chemistry "G. Ciamician", University of Bologna, Bologna, Italy; National Institute of Biostructure and Biosystems (INBB), 00136 Rome, Italy.
| | - Valentina Marassi
- Department of Chemistry "G. Ciamician", University of Bologna, Bologna, Italy; National Institute of Biostructure and Biosystems (INBB), 00136 Rome, Italy
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Redolfi Riva E, Özkan M, Contreras E, Pawar S, Zinno C, Escarda-Castro E, Kim J, Wieringa P, Stellacci F, Micera S, Navarro X. Beyond the limiting gap length: peripheral nerve regeneration through implantable nerve guidance conduits. Biomater Sci 2024; 12:1371-1404. [PMID: 38363090 DOI: 10.1039/d3bm01163a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
Peripheral nerve damage results in the loss of sensorimotor and autonomic functions, which is a significant burden to patients. Furthermore, nerve injuries greater than the limiting gap length require surgical repair. Although autografts are the preferred clinical choice, their usage is impeded by their limited availability, dimensional mismatch, and the sacrifice of another functional donor nerve. Accordingly, nerve guidance conduits, which are tubular scaffolds engineered to provide a biomimetic environment for nerve regeneration, have emerged as alternatives to autografts. Consequently, a few nerve guidance conduits have received clinical approval for the repair of short-mid nerve gaps but failed to regenerate limiting gap damage, which represents the bottleneck of this technology. Thus, it is still necessary to optimize the morphology and constituent materials of conduits. This review summarizes the recent advances in nerve conduit technology. Several manufacturing techniques and conduit designs are discussed, with emphasis on the structural improvement of simple hollow tubes, additive manufacturing techniques, and decellularized grafts. The main objective of this review is to provide a critical overview of nerve guidance conduit technology to support regeneration in long nerve defects, promote future developments, and speed up its clinical translation as a reliable alternative to autografts.
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Affiliation(s)
- Eugenio Redolfi Riva
- The Biorobotic Institute, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, 56127 Pisa, Italy.
- Department of Excellence in Robotics & AI, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, 56127 Pisa, Italy
| | - Melis Özkan
- Institute of Materials, école Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
- Bertarelli Foundation Chair in Translational Neural Engineering, Center for Neuroprosthetics and Institute of Bioengineering, école Polytechnique Federale de Lausanne, Lausanne, Switzerland
| | - Estefania Contreras
- Integral Service for Laboratory Animals (SIAL), Faculty of Veterinary, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
- Department of Cell Biology, Physiology and Immunology, Institute of Neurosciences, Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Spain.
| | - Sujeet Pawar
- Institute of Materials, école Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Ciro Zinno
- The Biorobotic Institute, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, 56127 Pisa, Italy.
- Department of Excellence in Robotics & AI, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, 56127 Pisa, Italy
| | - Enrique Escarda-Castro
- Complex Tissue Regeneration Department, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, The Netherlands
| | - Jaehyeon Kim
- Complex Tissue Regeneration Department, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, The Netherlands
| | - Paul Wieringa
- Complex Tissue Regeneration Department, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, The Netherlands
| | - Francesco Stellacci
- Institute of Materials, école Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
- Institute of Materials, Department of Bioengineering and Global Health Institute, École Polytechnique Fédérale de Lausanne (EPFL), Station 12, CH-1015 Lausanne, Switzerland
| | - Silvestro Micera
- The Biorobotic Institute, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, 56127 Pisa, Italy.
- Department of Excellence in Robotics & AI, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, 56127 Pisa, Italy
- Bertarelli Foundation Chair in Translational Neural Engineering, Center for Neuroprosthetics and Institute of Bioengineering, école Polytechnique Federale de Lausanne, Lausanne, Switzerland
| | - Xavier Navarro
- Department of Cell Biology, Physiology and Immunology, Institute of Neurosciences, Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Spain.
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), 28031 Madrid, Spain
- Institute Guttmann Foundation, Hospital of Neurorehabilitation, Badalona, Spain
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Contreras E, Traserra S, Bolívar S, Nieto-Nicolau N, Jaramillo J, Forés J, Jose-Cunilleras E, Moll X, García F, Delgado-Martínez I, Fariñas O, López-Chicón P, Vilarrodona A, Udina E, Navarro X. Decellularized Graft for Repairing Severe Peripheral Nerve Injuries in Sheep. Neurosurgery 2023; 93:1296-1304. [PMID: 37319401 DOI: 10.1227/neu.0000000000002572] [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: 02/25/2023] [Accepted: 04/26/2023] [Indexed: 06/17/2023] Open
Abstract
BACKGROUND AND OBJECTIVES Peripheral nerve injuries resulting in a nerve defect require surgical repair. The gold standard of autograft (AG) has several limitations, and therefore, new alternatives must be developed. The main objective of this study was to assess nerve regeneration through a long gap nerve injury (50 mm) in the peroneal nerve of sheep with a decellularized nerve allograft (DCA). METHODS A 5-cm long nerve gap was made in the peroneal nerve of sheep and repaired using an AG or using a DCA. Functional tests were performed once a month and electrophysiology and echography evaluations at 6.5 and 9 months postsurgery. Nerve grafts were harvested at 9 months for immunohistochemical and morphological analyses. RESULTS The decellularization protocol completely eliminated the cells while preserving the extracellular matrix of the nerve. No significant differences were observed in functional tests of locomotion and pain response. Reinnervation of the tibialis anterior muscles occurred in all animals, with some delay in the DCA group compared with the AG group. Histology showed a preserved fascicular structure in both AG and DCA; however, the number of axons distal to the nerve graft was higher in AG than in DCA. CONCLUSION The decellularized graft assayed supported effective axonal regeneration when used to repair a 5-cm long gap in the sheep. As expected, a delay in functional recovery was observed compared with the AG because of the lack of Schwann cells.
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Affiliation(s)
- Estefanía Contreras
- Department of Cell Biology, Physiology and Immunology, Institute of Neuroscience, Universitat Autònoma de Barcelona, Bellaterra , Spain
- Integral Service for Laboratory Animals (SIAL), Faculty of Veterinary, Universitat Autònoma de Barcelona, Bellaterra , Spain
| | - Sara Traserra
- Department of Cell Biology, Physiology and Immunology, Institute of Neuroscience, Universitat Autònoma de Barcelona, Bellaterra , Spain
- Integral Service for Laboratory Animals (SIAL), Faculty of Veterinary, Universitat Autònoma de Barcelona, Bellaterra , Spain
| | - Sara Bolívar
- Department of Cell Biology, Physiology and Immunology, Institute of Neuroscience, Universitat Autònoma de Barcelona, Bellaterra , Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, Instituto de Salud Carlos III, Bellaterra , Spain
| | | | - Jessica Jaramillo
- Department of Cell Biology, Physiology and Immunology, Institute of Neuroscience, Universitat Autònoma de Barcelona, Bellaterra , Spain
| | - Joaquim Forés
- Department of Cell Biology, Physiology and Immunology, Institute of Neuroscience, Universitat Autònoma de Barcelona, Bellaterra , Spain
- Hand and Peripheral Nerve Unit, Hospital Clínic i Provincial, Universitat de Barcelona, Barcelona , Spain
| | - Eduard Jose-Cunilleras
- Department of Animal Medicine and Surgery, Universitat Autònoma de Barcelona, Bellaterra , Spain
| | - Xavier Moll
- Department of Animal Medicine and Surgery, Universitat Autònoma de Barcelona, Bellaterra , Spain
| | - Félix García
- Department of Animal Medicine and Surgery, Universitat Autònoma de Barcelona, Bellaterra , Spain
| | - Ignacio Delgado-Martínez
- Department of Cell Biology, Physiology and Immunology, Institute of Neuroscience, Universitat Autònoma de Barcelona, Bellaterra , Spain
| | - Oscar Fariñas
- Barcelona Tissue Bank, Banc de Sang i Teixits, Barcelona , Spain
- Biomedical Research Institute Sant Pau (IIB-Sant Pau), Barcelona , Spain
| | - Patrícia López-Chicón
- Barcelona Tissue Bank, Banc de Sang i Teixits, Barcelona , Spain
- Biomedical Research Institute Sant Pau (IIB-Sant Pau), Barcelona , Spain
| | - Anna Vilarrodona
- Barcelona Tissue Bank, Banc de Sang i Teixits, Barcelona , Spain
- Vall Hebron Institute of Research (VHIR), Barcelona , Spain
| | - Esther Udina
- Department of Cell Biology, Physiology and Immunology, Institute of Neuroscience, Universitat Autònoma de Barcelona, Bellaterra , Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, Instituto de Salud Carlos III, Bellaterra , Spain
| | - Xavier Navarro
- Department of Cell Biology, Physiology and Immunology, Institute of Neuroscience, Universitat Autònoma de Barcelona, Bellaterra , Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, Instituto de Salud Carlos III, Bellaterra , Spain
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Maddy K, Kelley M, Burks SS. Commentary: Decellularized Graft for Repairing Severe Peripheral Nerve Injuries in Sheep. Neurosurgery 2023; 93:e149-e150. [PMID: 37409799 DOI: 10.1227/neu.0000000000002596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 05/14/2023] [Indexed: 07/07/2023] Open
Affiliation(s)
- Krisna Maddy
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami , Florida , USA
| | - Megan Kelley
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami , Florida , USA
| | - S Shelby Burks
- Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami , Florida , USA
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami , Florida , USA
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Lischer M, di Summa PG, Petrou IG, Schaefer DJ, Guzman R, Kalbermatten DF, Madduri S. Mesenchymal Stem Cells in Nerve Tissue Engineering: Bridging Nerve Gap Injuries in Large Animals. Int J Mol Sci 2023; 24:ijms24097800. [PMID: 37175506 PMCID: PMC10177884 DOI: 10.3390/ijms24097800] [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: 02/13/2023] [Revised: 04/18/2023] [Accepted: 04/20/2023] [Indexed: 05/15/2023] Open
Abstract
Cell-therapy-based nerve repair strategies hold great promise. In the field, there is an extensive amount of evidence for better regenerative outcomes when using tissue-engineered nerve grafts for bridging severe gap injuries. Although a massive number of studies have been performed using rodents, only a limited number involving nerve injury models of large animals were reported. Nerve injury models mirroring the human nerve size and injury complexity are crucial to direct the further clinical development of advanced therapeutic interventions. Thus, there is a great need for the advancement of research using large animals, which will closely reflect human nerve repair outcomes. Within this context, this review highlights various stem cell-based nerve repair strategies involving large animal models such as pigs, rabbits, dogs, and monkeys, with an emphasis on the limitations and strengths of therapeutic strategy and outcome measurements. Finally, future directions in the field of nerve repair are discussed. Thus, the present review provides valuable knowledge, as well as the current state of information and insights into nerve repair strategies using cell therapies in large animals.
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Affiliation(s)
- Mirko Lischer
- Center for Bioengineering and Regenerative Medicine, Department of Biomedical Engineering, University of Basel, 4123 Allschwil, Switzerland
| | - Pietro G di Summa
- Department of Plastic, Reconstructive and Hand Surgery, University Hospital of Lausanne and University of Lausanne, 1015 Lausanne, Switzerland
| | - Ilias G Petrou
- Plastic, Reconstructive and Aesthetic Surgery, Department of Surgery, University Hospitals and University of Geneva, 1205 Geneva, Switzerland
| | - Dirk J Schaefer
- Department of Plastic, Reconstructive, Aesthetic and Hand Surgery, University Hospital Basel, University of Basel, 4031 Basel, Switzerland
| | - Raphael Guzman
- Department of Neurosurgery, University Hospital Basel, 4031 Basel, Switzerland
| | - Daniel F Kalbermatten
- Plastic, Reconstructive and Aesthetic Surgery, Department of Surgery, University Hospitals and University of Geneva, 1205 Geneva, Switzerland
- Department of Plastic, Reconstructive, Aesthetic and Hand Surgery, University Hospital Basel, University of Basel, 4031 Basel, Switzerland
| | - Srinivas Madduri
- Center for Bioengineering and Regenerative Medicine, Department of Biomedical Engineering, University of Basel, 4123 Allschwil, Switzerland
- Plastic, Reconstructive and Aesthetic Surgery, Department of Surgery, University Hospitals and University of Geneva, 1205 Geneva, Switzerland
- Department of Plastic, Reconstructive, Aesthetic and Hand Surgery, University Hospital Basel, University of Basel, 4031 Basel, Switzerland
- Bioengineering and Neuroregeneration, Department of Surgery, Geneva University Hospitals and University of Geneva, 1205 Geneva, Switzerland
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García-García ÓD, El Soury M, Campos F, Sánchez-Porras D, Geuna S, Alaminos M, Gambarotta G, Chato-Astrain J, Raimondo S, Carriel V. Comprehensive ex vivo and in vivo preclinical evaluation of novel chemo enzymatic decellularized peripheral nerve allografts. Front Bioeng Biotechnol 2023; 11:1162684. [PMID: 37082209 PMCID: PMC10111265 DOI: 10.3389/fbioe.2023.1162684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 03/22/2023] [Indexed: 04/07/2023] Open
Abstract
As a reliable alternative to autografts, decellularized peripheral nerve allografts (DPNAs) should mimic the complex microstructure of native nerves and be immunogenically compatible. Nevertheless, there is a current lack of decellularization methods able to remove peripheral nerve cells without significantly altering the nerve extracellular matrix (ECM). The aims of this study are firstly to characterize ex vivo, in a histological, biochemical, biomechanical and ultrastructural way, three novel chemical-enzymatic decellularization protocols (P1, P2 and P3) in rat sciatic nerves and compared with the Sondell classic decellularization method and then, to select the most promising DPNAs to be tested in vivo. All the DPNAs generated present an efficient removal of the cellular material and myelin, while preserving the laminin and collagen network of the ECM (except P3) and were free from any significant alterations in the biomechanical parameters and biocompatibility properties. Then, P1 and P2 were selected to evaluate their regenerative effectivity and were compared with Sondell and autograft techniques in an in vivo model of sciatic defect with a 10-mm gap, after 15 weeks of follow-up. All study groups showed a partial motor and sensory recovery that were in correlation with the histological, histomorphometrical and ultrastructural analyses of nerve regeneration, being P2 the protocol showing the most similar results to the autograft control group.
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Affiliation(s)
- Óscar Darío García-García
- Tissue Engineering Group, Department of Histology, University of Granada and Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
- Doctoral Program in Biomedicine, University of Granada, Granada, Spain
- Department of Clinical and Biological Sciences and Neuroscience Institute Cavalieri Ottolenghi (NICO), University of Torino, Orbassano, Italy
| | - Marwa El Soury
- Tissue Engineering Group, Department of Histology, University of Granada and Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
- Department of Clinical and Biological Sciences and Neuroscience Institute Cavalieri Ottolenghi (NICO), University of Torino, Orbassano, Italy
| | - Fernando Campos
- Tissue Engineering Group, Department of Histology, University of Granada and Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - David Sánchez-Porras
- Tissue Engineering Group, Department of Histology, University of Granada and Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - Stefano Geuna
- Department of Clinical and Biological Sciences and Neuroscience Institute Cavalieri Ottolenghi (NICO), University of Torino, Orbassano, Italy
| | - Miguel Alaminos
- Tissue Engineering Group, Department of Histology, University of Granada and Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - Giovanna Gambarotta
- Department of Clinical and Biological Sciences and Neuroscience Institute Cavalieri Ottolenghi (NICO), University of Torino, Orbassano, Italy
| | - Jesús Chato-Astrain
- Tissue Engineering Group, Department of Histology, University of Granada and Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
- *Correspondence: Jesús Chato-Astrain, ; Víctor Carriel,
| | - Stefania Raimondo
- Department of Clinical and Biological Sciences and Neuroscience Institute Cavalieri Ottolenghi (NICO), University of Torino, Orbassano, Italy
| | - Víctor Carriel
- Tissue Engineering Group, Department of Histology, University of Granada and Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
- *Correspondence: Jesús Chato-Astrain, ; Víctor Carriel,
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