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Cicero L, Puleio R, Cassata G, Cirincione R, Camarda L, Caracappa D, D’Itri L, Licciardi M, Vigni GE. Peripheral Nerve Regeneration at 1 Year: Biodegradable Polybutylene Succinate Artificial Scaffold vs. Conventional Epineurial Sutures. Polymers (Basel) 2023; 15:3398. [PMID: 37631456 PMCID: PMC10458963 DOI: 10.3390/polym15163398] [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: 07/19/2023] [Revised: 08/02/2023] [Accepted: 08/11/2023] [Indexed: 08/27/2023] Open
Abstract
The utilization of a planar poly(1,4-butylene succinate) (PBS) scaffold has been demonstrated as an effective approach for preserving nerve continuity and facilitating nerve regeneration. In this study, we assessed the characteristics of a microfibrous tubular scaffold specifically designed and fabricated through electrospinning, utilizing PBS as a biocompatible and biodegradable material. These scaffolds were evaluated as nerve guide conduits in a rat model of sciatic nerve neurotmesis, demonstrating both their biodegradability and efficacy in enhancing the reconstruction process over a long-term period (1-year follow-up). Histological assay and electrophysiological evaluation were performed to compare the long-term outcomes following sutureless repair with the microfibrillar wrap to outcomes obtained using traditional suture repair.
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Affiliation(s)
- Luca Cicero
- Centro Mediterraneo Ricerca e Training (Ce.Me.Ri.T), Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, 90129 Palermo, Italy; (L.C.); (G.C.); (R.C.)
| | - Roberto Puleio
- Laboratorio Istopatologia e Immunoistochimica, Dipartimento Ricerca Biotecnologica e Diagnostica Specialistica, Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, 90129 Palermo, Italy;
| | - Giovanni Cassata
- Centro Mediterraneo Ricerca e Training (Ce.Me.Ri.T), Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, 90129 Palermo, Italy; (L.C.); (G.C.); (R.C.)
| | - Roberta Cirincione
- Centro Mediterraneo Ricerca e Training (Ce.Me.Ri.T), Istituto Zooprofilattico Sperimentale della Sicilia “A. Mirri”, 90129 Palermo, Italy; (L.C.); (G.C.); (R.C.)
| | - Lawrence Camarda
- Department of Orthopaedics and Traumatology, University of Palermo, 90133 Palermo, Italy; (L.C.); (L.D.); (G.E.V.)
| | - Dario Caracappa
- Dipartimento di Discipline Chirurgiche, Oncologiche e Stomatologiche (DICHIRONS), Università degli Studi di Palermo, 90127 Palermo, Italy;
| | - Lorenzo D’Itri
- Department of Orthopaedics and Traumatology, University of Palermo, 90133 Palermo, Italy; (L.C.); (L.D.); (G.E.V.)
| | - Mariano Licciardi
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche (STEBICEF), Università degli Studi di Palermo, 90132 Palermo, Italy
| | - Giulio Edoardo Vigni
- Department of Orthopaedics and Traumatology, University of Palermo, 90133 Palermo, Italy; (L.C.); (L.D.); (G.E.V.)
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Shahemi NH, Mahat MM, Asri NAN, Amir MA, Ab Rahim S, Kasri MA. Application of Conductive Hydrogels on Spinal Cord Injury Repair: A Review. ACS Biomater Sci Eng 2023. [PMID: 37364251 DOI: 10.1021/acsbiomaterials.3c00194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
Spinal cord injury (SCI) causes severe motor or sensory damage that leads to long-term disabilities due to disruption of electrical conduction in neuronal pathways. Despite current clinical therapies being used to limit the propagation of cell or tissue damage, the need for neuroregenerative therapies remains. Conductive hydrogels have been considered a promising neuroregenerative therapy due to their ability to provide a pro-regenerative microenvironment and flexible structure, which conforms to a complex SCI lesion. Furthermore, their conductivity can be utilized for noninvasive electrical signaling in dictating neuronal cell behavior. However, the ability of hydrogels to guide directional axon growth to reach the distal end for complete nerve reconnection remains a critical challenge. In this Review, we highlight recent advances in conductive hydrogels, including the incorporation of conductive materials, fabrication techniques, and cross-linking interactions. We also discuss important characteristics for designing conductive hydrogels for directional growth and regenerative therapy. We propose insights into electrical conductivity properties in a hydrogel that could be implemented as guidance for directional cell growth for SCI applications. Specifically, we highlight the practical implications of recent findings in the field, including the potential for conductive hydrogels to be used in clinical applications. We conclude that conductive hydrogels are a promising neuroregenerative therapy for SCI and that further research is needed to optimize their design and application.
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Affiliation(s)
- Nur Hidayah Shahemi
- Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
| | - Mohd Muzamir Mahat
- Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
| | - Nurul Ain Najihah Asri
- Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia
| | - Muhammad Abid Amir
- Faculty of Medicine, Sungai Buloh Campus, Universiti Teknologi MARA, 47000 Sungai Buloh, Selangor, Malaysia
| | - Sharaniza Ab Rahim
- Faculty of Medicine, Sungai Buloh Campus, Universiti Teknologi MARA, 47000 Sungai Buloh, Selangor, Malaysia
| | - Mohamad Arif Kasri
- Kulliyyah of Science, International Islamic University Malaysia, 25200 Kuantan, Pahang, Malaysia
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Lee SY, Thow SY, Abdullah S, Ng MH, Mohamed Haflah NH. Advancement of Electrospun Nerve Conduit for Peripheral Nerve Regeneration: A Systematic Review (2016-2021). Int J Nanomedicine 2022; 17:6723-6758. [PMID: 36600878 PMCID: PMC9805954 DOI: 10.2147/ijn.s362144] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 11/05/2022] [Indexed: 12/29/2022] Open
Abstract
Peripheral nerve injury (PNI) is a worldwide problem which hugely affects the quality of patients' life. Nerve conduits are now the alternative for treatment of PNI to mimic the gold standard, autologous nerve graft. In that case, with the advantages of electrospun micro- or nano-fibers nerve conduit, the peripheral nerve growth can be escalated, in a better way. In this systematic review, we focused on 39 preclinical studies of electrospun nerve conduit, which include the in vitro and in vivo evaluation from animal peripheral nerve defect models, to provide an update on the progress of the development of electrospun nerve conduit over the last 5 years (2016-2021). The physical characteristics, biocompatibility, functional and morphological outcomes of nerve conduits from different studies would be compared, to give a better strategy for treatment of PNI.
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Affiliation(s)
- Shin Yee Lee
- Centre of Tissue Engineering and Regenerative Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Cheras, Kuala Lumpur
| | - Soon Yong Thow
- Department of Orthopedics and Traumatology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Cheras, Kuala Lumpur
| | - Shalimar Abdullah
- Department of Orthopedics and Traumatology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Cheras, Kuala Lumpur
| | - Min Hwei Ng
- Centre of Tissue Engineering and Regenerative Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Cheras, Kuala Lumpur
| | - Nor Hazla Mohamed Haflah
- Department of Orthopedics and Traumatology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Cheras, Kuala Lumpur,Correspondence: Nor Hazla Mohamed Haflah, Department of Orthopedic & Traumatology’s Faculty of Medicine, UKM, Cheras, Kuala Lumpur, Tel +6012-3031316, Email
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Bai J, Liu C, Kong L, Tian S, Yu K, Tian D. Electrospun Polycaprolactone (PCL)-Amnion Nanofibrous Membrane Promotes Nerve Regeneration and Prevents Fibrosis in a Rat Sciatic Nerve Transection Model. Front Surg 2022; 9:842540. [PMID: 35372465 PMCID: PMC8971199 DOI: 10.3389/fsurg.2022.842540] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 02/21/2022] [Indexed: 11/13/2022] Open
Abstract
Functional recovery after peripheral nerve injury repair is typically unsatisfactory. An anastomotically poor microenvironment and scarring at the repair site are important factors impeding nerve regeneration. In this study, an electrospun poly-e-caprolactone (PCL)-amnion nanofibrous membrane comprising an amnion membrane and nonwoven electrospun PCL was used to wrap the sciatic nerve repair site in the rat model of a sciatic nerve transection. The effect of the PCL-amnion nanofibrous membrane on improving nerve regeneration and preventing scarring at the repair site was evaluated by expression of the inflammatory cytokine, sciatic functional index (SFI), electrophysiology, and histological analyses. Four weeks after repair, the degree of nerve adhesion, collagen deposition, and intraneural macrophage invasion of the PCL-amnion nanofibrous membrane group were significantly decreased compared with those of the Control group. Moreover, the PCL-amnion nanofibrous membrane decreased the expression of pro-inflammatory cytokines such as interleukin(IL)-6, Tumor Necrosis Factor(TNF)-a and the number of pro-inflammatory M1 macrophages, and increased the expression of anti-inflammatory cytokine such as IL-10, IL-13 and anti-inflammatory M2 macrophages. At 16 weeks, the PCL-amnion nanofibrous membrane improved functional recovery, including promoting nerve Schwann cell proliferation, axon regeneration, and reducing the time of muscle denervation. In summary, the PCL-amnion nanofibrous membrane effectively improved nerve regeneration and prevent fibrosis after nerve repair, which has good clinical application prospect for tissue repair.
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Affiliation(s)
- Jiangbo Bai
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Chunjie Liu
- Department of Orthopedics, Tangshan Workers Hospital, Tangshan, China
| | - Lingde Kong
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Siyu Tian
- Department of Orthopedics, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Kunlun Yu
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Dehu Tian
- Department of Hand Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, China
- *Correspondence: Dehu Tian
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Dai J, Niyazi M, Xie J. Tissue Engineering Scaffold Slowly Releasing Neurotrophic Factors to Bridge Long Peripheral Nerve Defect. J BIOMATER TISS ENG 2022. [DOI: 10.1166/jbt.2022.2909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Consistent application of neurotropic factors is necessary in peripheral nerve regeneration, yet challenging to achieve. Here we used a novel neurotropic factor controlled release system consisted of fibrin, fibronectin and hydrogel to slowly release two neurotrophic factors. At the
same time, physiological saline and reverse nerve suturing were used as negative and positive control. A year after surgery, animals which were treated by neurotrophic factor slow release system achieved far better neural regeneration and myelination, as well as superior recovery of hindfoot
than the negative control group. In the meanwhile, the results in the experimental group are still inferior to the nerve allograft group. In can be concluded from those results that, consistent releasing of neurotrophic factors can significantly promote long peripheral nerve regeneration,
but still short of achieving the results same as the gold standard of autologous nerve grafting.
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Affiliation(s)
- Jie Dai
- Department of Spine Surgery, Sixth Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, 86830001, China
| | - Maimaitiaili Niyazi
- Department of Spine Surgery, Sixth Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, 86830001, China
| | - Jiang Xie
- Department of Spine Surgery, Sixth Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, 86830001, China
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