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Powell J, Steinschaden T, Horowitz R, Song Y. Calcium channels caught in peripheral glia's tug-of-war on axon regeneration in Drosophila. Neural Regen Res 2025; 20:475-476. [PMID: 38819054 PMCID: PMC11317943 DOI: 10.4103/nrr.nrr-d-23-02049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 03/04/2024] [Accepted: 03/19/2024] [Indexed: 06/01/2024] Open
Affiliation(s)
- Jackson Powell
- Raymond G. Perelman Center for Cellular and Molecular Therapeutics, The Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - Tobias Steinschaden
- Raymond G. Perelman Center for Cellular and Molecular Therapeutics, The Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - Rose Horowitz
- The Neuroscience Graduate Group, University of Pennsylvania, Philadelphia, PA, USA
| | - Yuanquan Song
- Raymond G. Perelman Center for Cellular and Molecular Therapeutics, The Children’s Hospital of Philadelphia, Philadelphia, PA, USA
- The Neuroscience Graduate Group, University of Pennsylvania, Philadelphia, PA, USA
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, USA
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Lv S, Zhu G, Li Q, Zhang J, Tang L. Predicting in vivo therapeutic efficacy of CelTrac1000-labeled hair follicle epidermal neural crest stem cells in models of repairing rat facial nerve defects via second near-infrared fluorescence imaging. Life Sci 2024; 352:122869. [PMID: 38950644 DOI: 10.1016/j.lfs.2024.122869] [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: 04/17/2024] [Revised: 06/07/2024] [Accepted: 06/23/2024] [Indexed: 07/03/2024]
Abstract
AIMS To detect the therapeutic efficacy of CelTrac1000-labeled hair follicle epidermal neural crest stem cells (EPI-NCSCs) on repairing facial nerve defects by second near-infrared (NIR-II) fluorescence imaging. MATERIALS AND METHODS Firstly, CelTrac1000-labeled EPI-NCSCs were microinjected into the acellular nerve allografts (ANAs) to bridge a 10-mm-long gap in the buccal branch of facial nerve in adult rats. Then, Celtrac1000-labeled EPI-NCSCs were detected by NIR-II fluorescence imaging system to visualize the behavior of the transplanted cells in vivo. Additionally, the effect of the transplanted EPI-NCSCs on repairing facial nerve defect was examined. KEY FINDINGS Through 14 weeks of dynamic observation, the transplanted EPI-NCSCs survived in the ANAs in vivo after surgery. Meanwhile, the region of the NIR-II fluorescence signals was gradually limited to be consistent with the direction of the regenerative nerve segment. Furthermore, the results of functional and morphological analysis showed that the transplanted EPI-NCSCs could promote the recovery of facial paralysis and neural regeneration after injury. SIGNIFICANCE Our research provides a novel way to track the transplanted cells in preclinical studies of cell therapy for facial paralysis, and demonstrates the therapeutic potential of EPI-NCSCs combined with ANAs in bridging rat facial nerve defects.
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Affiliation(s)
- Shangrui Lv
- Department of Otorhinolaryngology-Head and Neck Surgery, Nanjing Medical University Affiliated Wuxi No 2 People's Hospital, Wuxi, 214002, Jiangsu, China
| | - Guochen Zhu
- Department of Otorhinolaryngology-Head and Neck Surgery, Nanjing Medical University Affiliated Wuxi No 2 People's Hospital, Wuxi, 214002, Jiangsu, China; Department of Otorhinolaryngology-Head and Neck Surgery, Jiangnan University Medical Center, Wuxi, 214002, Jiangsu, China; Department of Otorhinolaryngology-Head and Neck Surgery, Nantong University Affiliated Wuxi Clinical College, Wuxi, 214002, Jiangsu, China.
| | - Qianwen Li
- Department of Otorhinolaryngology-Head and Neck Surgery, Nanjing Medical University Affiliated Wuxi No 2 People's Hospital, Wuxi, 214002, Jiangsu, China
| | - Jing Zhang
- Department of Otorhinolaryngology-Head and Neck Surgery, Nantong University Affiliated Wuxi Clinical College, Wuxi, 214002, Jiangsu, China
| | - Li Tang
- Department of Otorhinolaryngology-Head and Neck Surgery, Nanjing Medical University Affiliated Wuxi No 2 People's Hospital, Wuxi, 214002, Jiangsu, China
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Wan T, Zhang FS, Qin MY, Jiang HR, Zhang M, Qu Y, Wang YL, Zhang PX. Growth factors: Bioactive macromolecular drugs for peripheral nerve injury treatment - Molecular mechanisms and delivery platforms. Biomed Pharmacother 2024; 170:116024. [PMID: 38113623 DOI: 10.1016/j.biopha.2023.116024] [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: 10/31/2023] [Revised: 12/05/2023] [Accepted: 12/14/2023] [Indexed: 12/21/2023] Open
Abstract
Bioactive macromolecular drugs known as Growth Factors (GFs), approved by the Food and Drug Administration (FDA), have found successful application in clinical practice. They hold significant promise for addressing peripheral nerve injuries (PNIs). Peripheral nerve guidance conduits (NGCs) loaded with GFs, in the context of tissue engineering, can ensure sustained and efficient release of these bioactive compounds. This, in turn, maintains a stable, long-term, and effective GF concentration essential for treating damaged peripheral nerves. Peripheral nerve regeneration is a complex process that entails the secretion of various GFs. Following PNI, GFs play a pivotal role in promoting nerve cell growth and survival, axon and myelin sheath regeneration, cell differentiation, and angiogenesis. They also regulate the regenerative microenvironment, stimulate plasticity changes post-nerve injury, and, consequently, expedite nerve structure and function repair. Both exogenous and endogenous GFs, including NGF, BDNF, NT-3, GDNF, IGF-1, bFGF, and VEGF, have been successfully loaded onto NGCs using techniques like physical adsorption, blend doping, chemical covalent binding, and engineered transfection. These approaches have effectively promoted the repair of peripheral nerves. Numerous studies have demonstrated similar tissue functional therapeutic outcomes compared to autologous nerve transplantation. This evidence underscores the substantial clinical application potential of GFs in the domain of peripheral nerve repair. In this article, we provide an overview of GFs in the context of peripheral nerve regeneration and drug delivery systems utilizing NGCs. Looking ahead, commercial materials for peripheral nerve repair hold the potential to facilitate the effective regeneration of damaged peripheral nerves and maintain the functionality of distant target organs through the sustained release of GFs.
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Affiliation(s)
- Teng Wan
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing 100044, China; Key Laboratory of Trauma and Neural Regeneration, Peking University, Beijing 100044, China; National Centre for Trauma Medicine, Beijing 100044, China
| | - Feng-Shi Zhang
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing 100044, China; Key Laboratory of Trauma and Neural Regeneration, Peking University, Beijing 100044, China; National Centre for Trauma Medicine, Beijing 100044, China
| | - Ming-Yu Qin
- Suzhou Medical College, Soochow University, Suzhou 215026, China
| | - Hao-Ran Jiang
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing 100044, China; Key Laboratory of Trauma and Neural Regeneration, Peking University, Beijing 100044, China; National Centre for Trauma Medicine, Beijing 100044, China
| | - Meng Zhang
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing 100044, China; Key Laboratory of Trauma and Neural Regeneration, Peking University, Beijing 100044, China; National Centre for Trauma Medicine, Beijing 100044, China
| | - Yang Qu
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing 100044, China; Key Laboratory of Trauma and Neural Regeneration, Peking University, Beijing 100044, China; National Centre for Trauma Medicine, Beijing 100044, China
| | - Yi-Lin Wang
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing 100044, China; Key Laboratory of Trauma and Neural Regeneration, Peking University, Beijing 100044, China; National Centre for Trauma Medicine, Beijing 100044, China.
| | - Pei-Xun Zhang
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing 100044, China; Key Laboratory of Trauma and Neural Regeneration, Peking University, Beijing 100044, China; National Centre for Trauma Medicine, Beijing 100044, China; Peking University People's Hospital Qingdao Hospital, Qingdao 266000, China.
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Yan L, Entezari A, Zhang Z, Zhong J, Liang J, Li Q, Qi J. An experimental and numerical study of the microstructural and biomechanical properties of human peripheral nerve endoneurium for the design of tissue scaffolds. Front Bioeng Biotechnol 2022; 10:1029416. [PMID: 36545684 PMCID: PMC9762494 DOI: 10.3389/fbioe.2022.1029416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 11/14/2022] [Indexed: 12/12/2022] Open
Abstract
Biomimetic design of scaffold architectures represents a promising strategy to enable the repair of tissue defects. Natural endoneurium extracellular matrix (eECM) exhibits a sophisticated microstructure and remarkable microenvironments conducive for guiding neurite regeneration. Therefore, the analysis of eECM is helpful to the design of bionic scaffold. Unfortunately, a fundamental lack of understanding of the microstructural characteristics and biomechanical properties of the human peripheral nerve eECM exists. In this study, we used microscopic computed tomography (micro-CT) to reconstruct a three-dimensional (3D) eECM model sourced from mixed nerves. The tensile strength and effective modulus of human fresh nerve fascicles were characterized experimentally. Permeability was calculated from a computational fluid dynamic (CFD) simulation of the 3D eECM model. Fluid flow of acellular nerve fascicles was tested experimentally to validate the permeability results obtained from CFD simulations. The key microstructural parameters, such as porosity is 35.5 ± 1.7%, tortuosity in endoneurium (X axis is 1.26 ± 0.028, Y axis is 1.26 ± 0.020 and Z axis is 1.17 ± 0.03, respectively), tortuosity in pore (X axis is 1.50 ± 0.09, Y axis is 1.44 ± 0.06 and Z axis is 1.13 ± 0.04, respectively), surface area-to-volume ratio (SAVR) is 0.165 ± 0.007 μm-1 and pore size is 11.8 ± 2.8 μm, respectively. These were characterized from the 3D eECM model and may exert different effects on the stiffness and permeability. The 3D microstructure of natural peripheral nerve eECM exhibits relatively lower permeability (3.10 m2 × 10-12 m2) than other soft tissues. These key microstructural and biomechanical parameters may play an important role in the design and fabrication of intraluminal guidance scaffolds to replace natural eECM. Our findings can aid the development of regenerative therapies and help improve scaffold design.
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Affiliation(s)
- Liwei Yan
- Department of Microsurgery, Trauma and Hand Surgery, The First Affiliated Hospital of Sun Yat‐sen University, Guangzhou, China
| | - Ali Entezari
- School of Biomedical Engineering, University of Technology Sydney, Ultimo, NSW, Australia,School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, Sydney, NSW, Australia
| | - Zhongpu Zhang
- School of Computing, Engineering and Mathematics, Western Sydney University, Penrith, NSW, Australia
| | - Jingxiao Zhong
- School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, Sydney, NSW, Australia
| | - Jing Liang
- Department of Microsurgery, Trauma and Hand Surgery, The First Affiliated Hospital of Sun Yat‐sen University, Guangzhou, China
| | - Qing Li
- School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney, Sydney, NSW, Australia,*Correspondence: Jian Qi, ; Qing Li,
| | - Jian Qi
- Department of Microsurgery, Trauma and Hand Surgery, The First Affiliated Hospital of Sun Yat‐sen University, Guangzhou, China,Guangdong Provincial Key Laboratory for Orthopedics and Traumatology, Guangzhou, China,*Correspondence: Jian Qi, ; Qing Li,
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