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An S, Shi J, Huang J, Li Z, Feng M, Cao G. HIF-1α Induced by Hypoxia Promotes Peripheral Nerve Injury Recovery Through Regulating Ferroptosis in DRG Neuron. Mol Neurobiol 2024; 61:6300-6311. [PMID: 38291291 DOI: 10.1007/s12035-024-03964-5] [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: 11/14/2023] [Accepted: 01/15/2024] [Indexed: 02/01/2024]
Abstract
Peripheral nerve injury (PNI) usually has a poor effect on functional recovery and severely declines the patient's quality of life. Our prior findings indicated that hypoxia remarkably promoted nerve regeneration of rats with sciatic nerve transection. However, the underlying molecular mechanisms of hypoxia in functional recovery of PNI still remain elusive. In this research, we tried to explain the functional roles and mechanisms of hypoxia and the hypoxia-inducible factor-1α (HIF-1α) in PNI. Our results indicated that hypoxia promoted proliferation and migration of dorsal root ganglia (DRG) and increased the expression of brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF). Mechanistically, hypoxia suppressed ferroptosis through activating HIF-1α in DRG neurons. Gain and loss of function studies were performed to evaluate the regulatory roles of HIF-1α in ferroptosis and neuron recovery. The results revealed that up-regulation of HIF-1α enhanced the expression of solute carrier family membrane 11 (SLC7A11) and glutathione peroxidase 4 (GPX4) and increased the contents of cysteine and glutathione, while inhibiting the accumulation of reactive oxygen species (ROS). Our findings provided novel light on the mechanism of ferroptosis involved in PNI and manifest hypoxia as a potential therapeutic strategy for PNI recovery.
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Affiliation(s)
- Shuai An
- Department of Orthopedics, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Jingfei Shi
- Cerebrovascular and Neuroscience Research Institute, Beijing Institute of Geriatrics, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Jiang Huang
- Department of Orthopedics, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Zheng Li
- Department of Orthopedics, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Mingli Feng
- Department of Orthopedics, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China.
| | - Guanglei Cao
- Department of Orthopedics, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China.
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Wang H, Fang F, Jing X, Xu D, Ren Z, Dou S, Xie Y, Zhuang Y. Augmentation of functional recovery via ROCK/PI3K/AKT pathway by Fasudil Hydrochloride in a rat sciatic nerve transection model. J Orthop Translat 2024; 47:74-86. [PMID: 39007038 PMCID: PMC11245988 DOI: 10.1016/j.jot.2024.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Revised: 05/18/2024] [Accepted: 06/03/2024] [Indexed: 07/16/2024] Open
Abstract
Backgrounds The functional recovery after peripheral nerve injury remains unsatisfactory. This study aims to perform a comprehensive evaluation of the efficacy of Fasudil Hydrochloride at treating the sciatic nerve transection injury in rats and the mechanism involved. Materials and methods In animal experiments, 75 Sprague Dawley rats that underwent transection and repair of the right sciatic nerve were divided into a control, Fasudil, and Fas + LY group, receiving daily intraperitoneal injection of saline, Fasudil Hydrochloride (10 mg/kg), and Fasudil Hydrochloride plus LY294002 (5 mg/kg), respectively. At day 3 after surgery, the expression of ROCK2, p-PI3K, and p-AKT in L4-5 DRG and the lumbosacral enlargement was determined using Western blotting. At day 7 and 14, axon density in the distal stump was evaluated with immunostaining using the anti-Neurofilament-200 antibody. At day 30, retrograde tracing by injecting Fluoro-gold in the distal stump was performed. Three months after surgery, remyelination was analyzed with immostaining using the anti-MPZ antibody and the transmission electron microscope; Moreover, Motion-Evoked Potential, and recovery of sensorimotor functions was evaluated with a neuromonitor, Footprint, Hot Plate and Von Frey Filaments, respectively. Moveover, the Gastrocnemius muscles were weighed, and then underwent H&E staining, and staining of the neuromuscular junction using α-Bungarotoxin to evaluate the extent of atrophy and degeneration of the endplates in the Gastrocnemius. In vitro, spinal motor neurons (SMNs) and dorsal root ganglia (DRG) were cultured to examine the impact of Fasudil Hydrochloride and LY294002 on the axon outgrowth. Results Three days after injury, the expression of ROCK2 increased significantly (P<0.01), and Fasudil application significantly increased the expression of p-PI3K and p-AKT in L4-6 DRG and the lumbosacral enlargement (P < 0.05). At day 7 and 14 after surgery, a higher axon density could be observed in the Fasudil group(P < 0.05). At day 30 after surgery, a larger number of motor and sensory neurons absorbing Fluoro-gold could be observed in the Fasudil group (P < 0.01) Three months after surgery, a greater thickness of myelin sheath could be observed in the Fasudil group (P < 0.05). The electrophysiological test showed that a larger amplitude of motion-evoked potential could be triggered in the Fasudil group (P < 0.01). Behavioral tests showed that a higher sciatic function index and a lower threshold for reacting to heat and mechanical stimuli could be measured in the Fasudil group. (P < 0.01). The wet weight ratio of the Gastrocnemius muscles and the area of the cross section of its myofibrils were greater in the Fasudil group (P < 0.01), which also demonstrated a higer ratio of axon-endplate connection and a larger size of endplates (P < 0.05). And there were no significant differences for the abovementioned parameters between the control and Fas + LY groups (P>0.05). In vitro studies showed that Fasudil could significantly promote axon growth in DRG and SMNs, and increase the expression of p-PI3K and p-AKT, which could be abolished by LY294002 (P < 0.05). Conclusions Fasudil can augment axon regeneration and remyelination, and functional recovery after sciatic nerve injury by activating the PI3K/AKT pathway. The translational potential of this article The translation potential of this article is that we report for the first time that Fasudil Hydrochloride has a remarkable efficacy at improving axon regeneration and remyelination following a transection injury of the right sciatic nerve in rats through the ROCK/PI3K/AKT pathway, which has a translational potential to be used clinically to treat peripheral nerve injury.
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Affiliation(s)
- Hai Wang
- Department of Orthopedics, First Affiliated Hospital, Fujian Medical University, Fuzhou, 350004, Fujian, China
- Department of Orthopedics, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, 350212, China
| | - Fang Fang
- Department of pharmacology, Fujian medical university, Fuzhou, 350108, China
| | - Xing Jing
- Fujian Key Laboratory of brain aging and neurodegenerative diseases, institute of clinical applied anatomy, the school of basic medical sciences, Fujian medical university, Fuzhou, 350108, Fujian, China
| | - Dan Xu
- Fujian Key Laboratory of brain aging and neurodegenerative diseases, institute of clinical applied anatomy, the school of basic medical sciences, Fujian medical university, Fuzhou, 350108, Fujian, China
| | - Zhenyu Ren
- Department of Orthopedics, First Affiliated Hospital, Fujian Medical University, Fuzhou, 350004, Fujian, China
- Department of Orthopedics, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, 350212, China
| | - Shuang Dou
- Fujian Key Laboratory of brain aging and neurodegenerative diseases, institute of clinical applied anatomy, the school of basic medical sciences, Fujian medical university, Fuzhou, 350108, Fujian, China
| | - Yun Xie
- Department of Orthopedics, First Affiliated Hospital, Fujian Medical University, Fuzhou, 350004, Fujian, China
- Department of Orthopedics, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, 350212, China
| | - Yuehong Zhuang
- Fujian Key Laboratory of brain aging and neurodegenerative diseases, institute of clinical applied anatomy, the school of basic medical sciences, Fujian medical university, Fuzhou, 350108, Fujian, China
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Yang S, Zhong S, Jin X, Fan G, Liao X, Yang X, He S. Mapping the hotspots and future trends of electrical stimulation for peripheral nerve injury: A bibliometric analysis from 2002 to 2023. Int Wound J 2024; 21:e14511. [PMID: 38084069 PMCID: PMC10958100 DOI: 10.1111/iwj.14511] [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: 10/06/2023] [Accepted: 11/09/2023] [Indexed: 01/14/2024] Open
Abstract
Peripheral nerve injuries often result in severe personal and social burden, and even with surgical treatment, patients continue to have poor clinical outcomes. Over the past two decades, electrical stimulation has been shown to promote axonal regeneration and alleviate refractory neuropathic pain. The aim of this study was to analyse this field using a bibliometric approach. Literature was searched through Web of Science Core Collection (WOSCC) for the years 2002-2023. Literature analysis included: (1) Describing publication trends in the field. (2) Exploring collaborative network relationships. (3) Finding research advances and research hotspots in the field. (4) Summarizing research trends in the field. With the number of studies in this field still increasing, a total of 693 publications were included in the analysis. This field of research is interdisciplinary in nature. Research hotspots include peripheral nerve regeneration, the treatment of neuropathic pain, materials for nerve injury repair, and the restoration of sensory function in patients with peripheral nerve injury. Correspondingly, the development of nerve conduits and systems for peripheral nerve electrical stimulation, clinical trials of peripheral nerve electrical stimulation, and tactile recovery and movement for amputees have shown significant promise as future research trends in this field.
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Affiliation(s)
- Sheng Yang
- Department of Orthopedic, Spinal Pain Research Institute, Shanghai Tenth People's HospitalTongji University School of MedicineShanghaiChina
| | - Sen Zhong
- Shanghai Tongji HospitalTongji University School of MedicineShanghaiChina
| | - Xuehan Jin
- Department of Orthopedic, Shanghai Tenth People's HospitalTongji University School of MedicineShanghaiChina
| | - Guoxin Fan
- National Key Clinical Pain Medicine of ChinaHuazhong University of Science and Technology Union Shenzhen HospitalShenzhenChina
| | - Xiang Liao
- National Key Clinical Pain Medicine of ChinaHuazhong University of Science and Technology Union Shenzhen HospitalShenzhenChina
| | - Xun Yang
- Department of Traumatic Orthopedics, Shenzhen Second People's Hospital, The First Affiliated Hospital, Shenzhen Translational Medicine InstituteShenzhen UniversityShenzhenChina
| | - Shisheng He
- Department of Orthopedic, Spinal Pain Research Institute, Shanghai Tenth People's HospitalTongji University School of MedicineShanghaiChina
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Muratori L, Crosio A, Ronchi G, Molinaro D, Tos P, Lovati AB, Raimondo S. Exploring an innovative decellularization protocol for porcine nerve grafts: a translational approach to peripheral nerve repair. Front Neuroanat 2024; 18:1380520. [PMID: 38567289 PMCID: PMC10985228 DOI: 10.3389/fnana.2024.1380520] [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: 02/01/2024] [Accepted: 03/06/2024] [Indexed: 04/04/2024] Open
Abstract
Introduction Peripheral nerves are frequently affected by lesions caused by traumatic or iatrogenic damages, resulting in loss of motor and sensory function, crucial in orthopedic outcomes and with a significant impact on patients' quality of life. Many strategies have been proposed over years to repair nerve injuries with substance loss, to achieve musculoskeletal reinnervation and functional recovery. Allograft have been tested as an alternative to the gold standard, the autograft technique, but nerves from donors frequently cause immunogenic response. For this reason, several studies are focusing to find the best way to decellularize nerves preserving either the extracellular matrix, either the basal lamina, as the key elements used by Schwann cells and axons during the regenerative process. Methods This study focuses on a novel decellularization protocol for porcine nerves, aimed at reducing immunogenicity while preserving essential elements like the extracellular matrix and basal lamina, vital for nerve regeneration. To investigate the efficacy of the decellularization protocol to remove immunogenic cellular components of the nerve tissue and to preserve the basal lamina and extracellular matrix, morphological analysis was performed through Masson's Trichrome staining, immunofluorescence, high resolution light microscopy and transmission electron microscopy. Decellularized porcine nerve graft were then employed in vivo to repair a rat median nerve lesion. Morphological analysis was also used to study the ability of the porcine decellularized graft to support the nerve regeneration. Results and Discussion The decellularization method was effective in preparing porcine superficial peroneal nerves for grafting as evidenced by the removal of immunogenic components and preservation of the ECM. Morphological analysis demonstrated that four weeks after injury, regenerating fibers colonized the graft suggesting a promising use to repair severe nerve lesions. The idea of using a porcine nerve graft arises from a translational perspective. This approach offers a promising direction in the orthopedic field for nerve repair, especially in severe cases where conventional methods are limited.
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Affiliation(s)
- Luisa Muratori
- Department of Clinical and Biological Sciences, Neuroscience Institute Cavalieri Ottolenghi (NICO), University of Turin, Turin, Italy
| | - Alessandro Crosio
- Department of Clinical and Biological Sciences, Neuroscience Institute Cavalieri Ottolenghi (NICO), University of Turin, Turin, Italy
- UOC Traumatology-Reconstructive Microsurgery, Department of Orthopedics and Traumatology, CTO Hospital, Turin, Italy
| | - Giulia Ronchi
- Department of Clinical and Biological Sciences, Neuroscience Institute Cavalieri Ottolenghi (NICO), University of Turin, Turin, Italy
| | - Debora Molinaro
- Department of Clinical and Biological Sciences, Neuroscience Institute Cavalieri Ottolenghi (NICO), University of Turin, Turin, Italy
| | - Pierluigi Tos
- Reconstructive Microsurgery and Hand Surgery Unit, ASST Pini-CTO, Milan, Italy
| | - Arianna B. Lovati
- Cell and Tissue Engineering Laboratory, IRCCS Istituto Ortopedico Galeazzi, Milan, Italy
| | - Stefania Raimondo
- Department of Clinical and Biological Sciences, Neuroscience Institute Cavalieri Ottolenghi (NICO), University of Turin, Turin, Italy
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