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Wang W, Yuan M, Xu Y, Yang J, Wang X, Zhou Y, Yu Z, Lu Z, Wang Y, Hu C, Bai Q, Li Z. Prokineticin-2 Participates in Chronic Constriction Injury-Triggered Neuropathic Pain and Anxiety via Regulated by NF-κB in Nucleus Accumbens Shell in Rats. Mol Neurobiol 2024; 61:2764-2783. [PMID: 37934398 DOI: 10.1007/s12035-023-03680-6] [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: 12/05/2022] [Accepted: 09/27/2023] [Indexed: 11/08/2023]
Abstract
Neuropathic pain (NP) is an intractable pain that results from primary nervous system injury and dysfunction. Herein, we demonstrated in animal models that peripheral nerve injury induced enhanced pain perception and anxiety-like behaviors. According to previous reports, nucleus accumbens (NAc) shell is required for complete expression of neuropathic pain behaviors and mood alternations, we found the elevated mRNA and protein level of Prokineticin-2 (Prok2) in the NAc shell after Chronic Constriction Injury (CCI). Prok2 knockdown in the NAc shell reversed NP and anxiety-like behaviors in rats, indicating that Prok2 might play a fundamental role in NP and anxiety co-morbidity. CCI significantly enhanced Prok2 co-expression with NF-κB P-p65 in comparison with control animals. In addition to reversing the established nociceptive hypersensitivities and anxiety simultaneously, NAc microinjection of NF-κB siRNA or specific inhibitor PDTC reversed Prok2 upregulation. Besides, Prok2 was significantly decreased in vitro when co-transfected with si-NF-κB. Dual-Luciferase assay showed NF-κB directly activated Prok2 gene transcriptional activity. Overall, these findings provide new insights into the neurobiological mechanisms behind NP and comorbid anxiety. The NF-κB/Prok2 pathway could be a potential therapeutic target for NP and anxiety disorders.
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Affiliation(s)
- Wenting Wang
- Department of Anesthesiology and Perioperative Medicine, Second Affiliated Hospital of Zhengzhou University, No.2, Jingba Road, Jinshui District, Zhengzhou, Henan, China
| | - Meng Yuan
- Department of Anesthesiology and Perioperative Medicine, Second Affiliated Hospital of Zhengzhou University, No.2, Jingba Road, Jinshui District, Zhengzhou, Henan, China
| | - Yaowei Xu
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Institute of Neuroscience, Academy of Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Jingjie Yang
- Department of Anesthesiology and Perioperative Medicine, Second Affiliated Hospital of Zhengzhou University, No.2, Jingba Road, Jinshui District, Zhengzhou, Henan, China
| | - Xiaoling Wang
- Department of Anesthesiology and Perioperative Medicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, China
| | - Yifan Zhou
- Department of Anesthesiology and Perioperative Medicine, Second Affiliated Hospital of Zhengzhou University, No.2, Jingba Road, Jinshui District, Zhengzhou, Henan, China
| | - Zhixiang Yu
- Department of Anesthesiology and Perioperative Medicine, Second Affiliated Hospital of Zhengzhou University, No.2, Jingba Road, Jinshui District, Zhengzhou, Henan, China
| | - Zhongyuan Lu
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Yiming Wang
- Department of Anesthesiology and Perioperative Medicine, Second Affiliated Hospital of Zhengzhou University, No.2, Jingba Road, Jinshui District, Zhengzhou, Henan, China
| | - Chenge Hu
- Department of Anesthesiology and Perioperative Medicine, Second Affiliated Hospital of Zhengzhou University, No.2, Jingba Road, Jinshui District, Zhengzhou, Henan, China
- Institute of Neuroscience, Academy of Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Qian Bai
- Department of Anesthesiology and Perioperative Medicine, Second Affiliated Hospital of Zhengzhou University, No.2, Jingba Road, Jinshui District, Zhengzhou, Henan, China.
| | - Zhisong Li
- Department of Anesthesiology and Perioperative Medicine, Second Affiliated Hospital of Zhengzhou University, No.2, Jingba Road, Jinshui District, Zhengzhou, Henan, China.
- Institute of Neuroscience, Academy of Medical Sciences, Zhengzhou University, Zhengzhou, China.
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2
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Chen SH, Lin YW, Tseng WL, Lin WT, Lin SC, Hsueh YY. Ultrahigh frequency transcutaneous electrical nerve stimulation for neuropathic pain alleviation and neuromodulation. Neurotherapeutics 2024; 21:e00336. [PMID: 38368171 PMCID: PMC10943071 DOI: 10.1016/j.neurot.2024.e00336] [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: 02/04/2024] [Accepted: 02/06/2024] [Indexed: 02/19/2024] Open
Abstract
A challenging complication in patients with peripheral compressive neuropathy is neuropathic pain. Excessive neuroinflammation at the injury site worsens neuropathic pain and impairs function. Currently, non-invasive modulation techniques like transcutaneous electrical nerve stimulation (TENS) have shown therapeutic promise with positive results. However, the underlying regulatory molecular mechanism for pain relief remains complex and unexplored. This study aimed to validate the therapeutic effect of ultrahigh frequency (UHF)-TENS in chronic constriction injury of the rat sciatic nerve. Alleviation of mechanical allodynia was achieved through the application of UHF-TENS, lasting for 3 days after one session of therapy and 4 days after two sessions, without causing additional damage to the myelinated axon structure. The entire tissue collection schedule was divided into four time points: nerve exposure surgery, 7 days after nerve ligation, and 1 and 5 days after one session of UHF therapy. Significant reductions in pain-related neuropeptides, MEK, c-Myc, c-FOS, COX2, and substance P, were observed in the injured DRG neurons after UHF therapy. RNA sequencing of differential gene expression in sensory neurons revealed significant downregulation in Cables, Pik3r1, Vps4b, Tlr7, and Ezh2 after UHF therapy, while upregulation was observed in Nfkbie and Cln3. UHF-TENS effectively and safely relieved neuropathic pain without causing further nerve damage. The decreased production of pain-related neuropeptides within the DRG provided the therapeutic benefit. Possible molecular mechanisms behind UHF-TENS may result from the modulation of the NF-κB complex, toll-like receptor-7, and phosphoinositide 3-kinase/Akt signaling pathways. These results suggest the neuromodulatory effects of UHF-TENS in rat sciatic nerve chronic constriction injury, including alleviation of neuropathic pain, amelioration of pain-related neuropeptides, and regulation of neuroinflammatory gene expression. In combination with the regulation of related neuroinflammatory genes, UHF-TENS could become a new modality for enhancing the treatment of neuropathic pain in the future.
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Affiliation(s)
- Szu-Han Chen
- Division of Plastic and Reconstructive Surgery, Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Center of Cell Therapy, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; International Research Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan; Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yu-Wen Lin
- Division of Plastic and Reconstructive Surgery, Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Wan-Ling Tseng
- Division of Plastic and Reconstructive Surgery, Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Division of Plastic and Reconstructive Surgery, Department of Surgery, Tainan Hospital, Ministry of Health and Welfare, Tainan 700, Taiwan
| | - Wei-Tso Lin
- Gimer Medical Co., Ltd, New Taipei City, Taiwan
| | - Sheng-Che Lin
- Division of Plastic Surgery, Department of Surgery, An-Nan Hospital, China Medical University, Tainan, Taiwan
| | - Yuan-Yu Hsueh
- Division of Plastic and Reconstructive Surgery, Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Center of Cell Therapy, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan; International Research Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan; Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
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3
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Chen SH, Wu CC, Tseng WL, Lu FI, Liu YH, Lin SP, Lin SC, Hsueh YY. Adipose-derived stem cells modulate neuroinflammation and improve functional recovery in chronic constriction injury of the rat sciatic nerve. Front Neurosci 2023; 17:1172740. [PMID: 37457010 PMCID: PMC10339833 DOI: 10.3389/fnins.2023.1172740] [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: 02/23/2023] [Accepted: 06/05/2023] [Indexed: 07/18/2023] Open
Abstract
Introduction Compressive neuropathy, a common chronic traumatic injury of peripheral nerves, leads to variable impairment in sensory and motor function. Clinical symptoms persist in a significant portion of patients despite decompression, with muscle atrophy and persistent neuropathic pain affecting 10%-25% of cases. Excessive inflammation and immune cell infiltration in the injured nerve hinder axon regeneration and functional recovery. Although adipose-derived stem cells (ASCs) have demonstrated neural regeneration and immunomodulatory potential, their specific effects on compressive neuropathy are still unclear. Methods We conducted modified CCI models on adult male Sprague-Dawley rats to induce irreversible neuropathic pain and muscle atrophy in the sciatic nerve. Intraneural ASC injection and nerve decompression were performed. Behavioral analysis, muscle examination, electrophysiological evaluation, and immunofluorescent examination of the injured nerve and associated DRG were conducted to explore axon regeneration, neuroinflammation, and the modulation of inflammatory gene expression. Transplanted ASCs were tracked to investigate potential beneficial mechanisms on the local nerve and DRG. Results Persistent neuropathic pain was induced by chronic constriction of the rat sciatic nerve. Local ASC treatment has demonstrated robust beneficial outcomes, including the alleviation of mechanical allodynia, improvement of gait, regeneration of muscle fibers, and electrophysiological recovery. In addition, locally transplanted ASCs facilitated axon remyelination, alleviated neuroinflammation, and reduced inflammatory cell infiltration of the injured nerve and associated dorsal root ganglion (DRG). Trafficking of the transplanted ASC preserved viability and phenotype less than 7 days but contributed to robust immunomodulatory regulation of inflammatory gene expression in both the injured nerve and DRG. Discussion Locally transplanted ASC on compressed nerve improve sensory and motor recoveries from irreversible chronic constriction injury of rat sciatic nerve via alleviation of both local and remote neuroinflammation, suggesting the promising role of adjuvant ASC therapies for clinical compressive neuropathy.
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Affiliation(s)
- Szu-Han Chen
- Division of Plastic and Reconstructive Surgery, Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Center of Cell Therapy, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- International Research Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chia-Ching Wu
- International Research Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan
- Department of Cell Biology and Anatomy, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Wan-Ling Tseng
- Division of Plastic and Reconstructive Surgery, Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Fu-I Lu
- Department of Biotechnology and Bioindustry Science, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan
- The integrative Evolutionary Galliform Genomics (iEGG) and Animal Biotechnology Center, National Chung Hsing University, Taichung, Taiwan
| | - Ya-Hsin Liu
- Department of Life Sciences, National Cheng Kung University, Tainan, Taiwan
| | - Shau-Ping Lin
- Institute of Biotechnology, College of Bio-Resources and Agriculture, National Taiwan University, Taipei, Taiwan
| | - Sheng-Che Lin
- Division of Plastic Surgery, Department of Surgery, An-Nan Hospital, China Medical University, Tainan, Taiwan
| | - Yuan-Yu Hsueh
- Division of Plastic and Reconstructive Surgery, Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Center of Cell Therapy, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- International Research Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
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Wu E, Jiang X, Sun J, Xu B, Li W, Liao Q, Zhang Y, Zhou G, Wu W. The spatial-temporal reactive changes of compressed optic nerve in a clinically relevant rabbit model of persistent compressive optic nerve axonopathy. Exp Eye Res 2023; 226:109343. [PMID: 36509163 DOI: 10.1016/j.exer.2022.109343] [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: 09/14/2022] [Revised: 10/30/2022] [Accepted: 12/05/2022] [Indexed: 12/13/2022]
Abstract
The optic nerve (ON) can get compressed in different diseases. However, the pathological and functional changes occurring in the compressed ON over time under constant compression are still unclear. In the present study, we implanted an artificial tube around the optic nerve of a rabbit to primarily create a clinically relevant persistent compressive optic nerve axonopathy (PCOA). Due to the protuberance on the inner ring of the tube, steady and persistent compressions were maintained. In this model, we investigated the thickness of ganglion cell complex (GCC), retinal ganglion cell (RGC) density, axon density of optic nerve, flash visual evoked potential (FVEP), and anterograde axonal transport at various times in four different groups viz. the no comp, 1/2 comp, 3/4 comp, and crush groups. The GCC thickness, RGC density, and axon density of ON were hierarchically and significantly decreased in 1/2 comp, 3/4 comp, and crush groups. Compared to no comp eyes, the P2 amplitude ratio of FVEP was significantly decreased in 3/4 comp but not in 1/2 comp eyes. Only a portion of the optic nerve lost the ability of anterograde axonal transport in the 1/2 comp group. However, it was evident at 2-wpo and more prominent at 4-wpo in 3/4 comp eyes. This study reveals that the compression only induces the homolateral ON axons impairment and the proportion of the affected axons maintains the same for mild compression for at least three months. Furthermore, an underlying threshold effect highlights that mild compression does not require urgent surgery, while the severe compression warrants immediate surgical intervention.
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Affiliation(s)
- Ende Wu
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang, 325027, China.
| | - XiaoHui Jiang
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Jiaying Sun
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Boyue Xu
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Wenzhe Li
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Qianling Liao
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Yikui Zhang
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Guangming Zhou
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Wencan Wu
- The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical University, 270 Xueyuan Road, Wenzhou, Zhejiang, 325027, China.
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Lee N, Park GT, Lim JK, Choi EB, Moon HJ, Kim DK, Choi SM, Song YC, Kim TK, Kim JH. Mesenchymal stem cell spheroids alleviate neuropathic pain by modulating chronic inflammatory response genes. Front Immunol 2022; 13:940258. [PMID: 36003384 PMCID: PMC9393760 DOI: 10.3389/fimmu.2022.940258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 07/14/2022] [Indexed: 11/13/2022] Open
Abstract
Chronic neuropathic pain is caused by dysfunction of the peripheral nerves associated with the somatosensory system. Mesenchymal stem cells (MSCs) have attracted attention as promising cell therapeutics for chronic pain; however, their clinical application has been hampered by the poor in vivo survival and low therapeutic efficacy of transplanted cells. Increasing evidence suggests enhanced therapeutic efficacy of spheroids formed by three-dimensional culture of MSCs. In the present study, we established a neuropathic pain murine model by inducing a chronic constriction injury through ligation of the right sciatic nerve and measured the therapeutic effects and survival efficacy of spheroids. Monolayer-cultured and spheroids were transplanted into the gastrocnemius muscle close to the damaged sciatic nerve. Transplantation of spheroids alleviated chronic pain more potently and exhibited prolonged in vivo survival compared to monolayer-cultured cells. Moreover, spheroids significantly reduced macrophage infiltration into the injured tissues. Interestingly, the expression of mouse-origin genes associated with inflammatory responses, Ccl11/Eotaxin, interleukin 1A, tumor necrosis factor B, and tumor necrosis factor, was significantly attenuated by the administration of spheroids compared to that of monolayer. These results suggest that MSC spheroids exhibit enhanced in vivo survival after cell transplantation and reduced the host inflammatory response through the regulation of main chronic inflammatory response-related genes.
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Affiliation(s)
- Nayeon Lee
- Convergence Stem Cell Research Center, Medical Research Institute, Pusan National University, Yangsan, South Korea
- Department of Physiology, School of Medicine, Pusan National University, Yangsan, South Korea
| | - Gyu Tae Park
- Convergence Stem Cell Research Center, Medical Research Institute, Pusan National University, Yangsan, South Korea
- Department of Physiology, School of Medicine, Pusan National University, Yangsan, South Korea
| | - Jae Kyung Lim
- Department of Physiology, School of Medicine, Pusan National University, Yangsan, South Korea
| | - Eun Bae Choi
- Department of Physiology, School of Medicine, Pusan National University, Yangsan, South Korea
| | - Hye Ji Moon
- Department of Physiology, School of Medicine, Pusan National University, Yangsan, South Korea
| | - Dae Kyoung Kim
- Department of Physiology, School of Medicine, Pusan National University, Yangsan, South Korea
| | - Seong Min Choi
- Department of Physiology, School of Medicine, Pusan National University, Yangsan, South Korea
| | - Young Cheol Song
- Department of Physiology, School of Medicine, Pusan National University, Yangsan, South Korea
| | - Tae Kyun Kim
- Department of Anesthesia and Pain Medicine, Pusan National University Yangsan Hospital, Yangsan, South Korea
| | - Jae Ho Kim
- Convergence Stem Cell Research Center, Medical Research Institute, Pusan National University, Yangsan, South Korea
- Department of Physiology, School of Medicine, Pusan National University, Yangsan, South Korea
- *Correspondence: Jae Ho Kim,
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Yadav A, Huang TC, Chen SH, Ramasamy TS, Hsueh YY, Lin SP, Lu FI, Liu YH, Wu CC. Sodium phenylbutyrate inhibits Schwann cell inflammation via HDAC and NFκB to promote axonal regeneration and remyelination. J Neuroinflammation 2021; 18:238. [PMID: 34656124 PMCID: PMC8520633 DOI: 10.1186/s12974-021-02273-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 09/08/2021] [Indexed: 11/24/2022] Open
Abstract
Background Epigenetic regulation by histone deacetylases (HDACs) in Schwann cells (SCs) after injury facilitates them to undergo de- and redifferentiation processes necessary to support various stages of nerve repair. Although de-differentiation activates the synthesis and secretion of inflammatory cytokines by SCs to initiate an immune response during nerve repair, changes in either the timing or duration of prolonged inflammation mediated by SCs can affect later processes associated with repair and regeneration. Limited studies have investigated the regulatory processes through which HDACs in SCs control inflammatory cytokines to provide a favorable environment for peripheral nerve regeneration. Methods We employed the HDAC inhibitor (HDACi) sodium phenylbutyrate (PBA) to address this question in an in vitro RT4 SC inflammation model and an in vivo sciatic nerve transection injury model to examine the effects of HDAC inhibition on the expression of pro-inflammatory cytokines. Furthermore, we assessed the outcomes of suppression of extended inflammation on the regenerative potential of nerves by assessing axonal regeneration, remyelination, and reinnervation. Results Significant reductions in lipopolysaccharide (LPS)-induced pro-inflammatory cytokine (tumor necrosis factor-α [TNFα]) expression and secretion were observed in vitro following PBA treatment. PBA treatment also affected the transient changes in nuclear factor κB (NFκB)-p65 phosphorylation and translocation in response to LPS induction in RT4 SCs. Similarly, PBA mediated long-term suppressive effects on HDAC3 expression and activity. PBA administration resulted in marked inhibition of pro-inflammatory cytokine secretion at the site of transection injury when compared with that in the hydrogel control group at 6-week post-injury. A conducive microenvironment for axonal regrowth and remyelination was generated by increasing expression levels of protein gene product 9.5 (PGP9.5) and myelin basic protein (MBP) in regenerating nerve tissues. PBA administration increased the relative gastrocnemius muscle weight percentage and maintained the intactness of muscle bundles when compared with those in the hydrogel control group. Conclusions Suppressing the lengthened state of inflammation using PBA treatment favors axonal regrowth and remyelination following nerve transection injury. PBA treatment also regulates pro-inflammatory cytokine expression by inhibiting the transcriptional activation of NFκB-p65 and HDAC3 in SCs in vitro. Supplementary Information The online version contains supplementary material available at 10.1186/s12974-021-02273-1.
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Affiliation(s)
- Anjali Yadav
- Taiwan International Graduate Program in Interdisciplinary Neuroscience, Academia Sinica, Taipei, Taiwan.,Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Cell Biology and Anatomy, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Tzu-Chieh Huang
- Department of Cell Biology and Anatomy, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,International Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan
| | - Szu-Han Chen
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,International Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan.,Division of Plastic and Reconstructive Surgery, Department of Surgery, College of Medicine, National Cheng Kung University Hospital, National Cheng Kung University, Tainan, Taiwan
| | - Thamil Selvee Ramasamy
- Stem Cell Biology Laboratory, Department of Molecular Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Yuan-Yu Hsueh
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,International Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan.,Division of Plastic and Reconstructive Surgery, Department of Surgery, College of Medicine, National Cheng Kung University Hospital, National Cheng Kung University, Tainan, Taiwan
| | - Shau-Ping Lin
- Institute of Biotechnology, College of Bio-Resources and Agriculture, National Taiwan University, Taipei, Taiwan
| | - Fu-I Lu
- Department of Biotechnology and Bioindustry Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan
| | - Ya-Hsin Liu
- Department of Life Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, Taiwan
| | - Chia-Ching Wu
- Department of Cell Biology and Anatomy, College of Medicine, National Cheng Kung University, Tainan, Taiwan. .,Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan. .,International Center for Wound Repair and Regeneration, National Cheng Kung University, Tainan, Taiwan. .,Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan.
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7
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Degrugillier L, Prautsch KM, Schaefer DJ, Guzman R, Schären S, Kalbermatten DF, Madduri S. A new model of chronic peripheral nerve compression for basic research and pharmaceutical drug testing. Regen Med 2021; 16:931-947. [PMID: 34553612 DOI: 10.2217/rme-2020-0129] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: To develop a consistent model to standardize research in the field of chronic peripheral nerve neuropathy. Methods: The left sciatic nerve of 8-week-old Sprague-Dawley rats was compressed using a customized instrument leaving a defined post injury nerve lumen (400 μm, 250 μm, 100 μm, 0 μm) for 6 weeks. Sensory and motor outcomes were measured weekly, and histomorphology and electrophysiology after 6 weeks. Results: The findings demonstrated compression depth-dependent sensory and motor pathologies. Quantitative measurements revealed a significant myelin degeneration, axon irregularities and muscle atrophy. At the functional level, we highlighted the dynamics of the different injury profiles. Conclusion: Our novel model of chronic peripheral nerve compression is a useful tool for research on pathophysiology and new therapeutic approaches.
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Affiliation(s)
- Lucas Degrugillier
- Department of Pathology, University Hospital Basel, Basel, 4021, Switzerland.,Department of Biomedical Engineering, University of Basel, Allschwil, 4123, Switzerland.,Department of Plastic, Reconstructive, Aesthetic & Hand Surgery, University Hospital Basel, University of Basel, Basel, 4021, Switzerland
| | - Katharina M Prautsch
- Department of Pathology, University Hospital Basel, Basel, 4021, Switzerland.,Department of Biomedical Engineering, University of Basel, Allschwil, 4123, Switzerland.,Department of Plastic, Reconstructive, Aesthetic & Hand Surgery, University Hospital Basel, University of Basel, Basel, 4021, Switzerland
| | - Dirk J Schaefer
- Department of Plastic, Reconstructive, Aesthetic & Hand Surgery, University Hospital Basel, University of Basel, Basel, 4021, Switzerland
| | - Raphael Guzman
- Department of Neurosurgery, University Hospital Basel, University of Basel, Basel, 4021, Switzerland
| | - Stefan Schären
- Department of Spinal Surgery, University Hospital Basel, Basel, 4021, Switzerland
| | - Daniel F Kalbermatten
- Department of Plastic, Reconstructive, Aesthetic & Hand Surgery, University Hospital Basel, University of Basel, Basel, 4021, Switzerland.,Bioengineering & Neuroregeneration, Department of Surgery, Geneva University Hospitals & University of Geneva, 1211, Geneva, Switzerland.,Plastic, Reconstructive & Aesthetic Srugery, Department of Surgery, Geneva University Hospitals & University of Geneva, 1211, Geneva, Switzerland
| | - Srinivas Madduri
- Department of Biomedical Engineering, University of Basel, Allschwil, 4123, Switzerland.,Department of Plastic, Reconstructive, Aesthetic & Hand Surgery, University Hospital Basel, University of Basel, Basel, 4021, Switzerland.,Bioengineering & Neuroregeneration, Department of Surgery, Geneva University Hospitals & University of Geneva, 1211, Geneva, Switzerland.,Plastic, Reconstructive & Aesthetic Srugery, Department of Surgery, Geneva University Hospitals & University of Geneva, 1211, Geneva, Switzerland
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8
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Investigation of Neuropathology after Nerve Release in Chronic Constriction Injury of Rat Sciatic Nerve. Int J Mol Sci 2021; 22:ijms22094746. [PMID: 33947104 PMCID: PMC8125611 DOI: 10.3390/ijms22094746] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 04/19/2021] [Accepted: 04/27/2021] [Indexed: 02/07/2023] Open
Abstract
Peripheral compressive neuropathy causes significant neuropathic pain, muscle weakness and prolong neuroinflammation. Surgical decompression remains the gold standard of treatment but the outcome is suboptimal with a high recurrence rate. From mechanical compression to chemical propagation of the local inflammatory signals, little is known about the distinct neuropathologic patterns and the genetic signatures after nerve decompression. In this study, controllable mechanical constriction forces over rat sciatic nerve induces irreversible sensorimotor dysfunction with sustained local neuroinflammation, even 4 weeks after nerve release. Significant gene upregulations are found in the dorsal root ganglia, regarding inflammatory, proapoptotic and neuropathic pain signals. Genetic profiling of neuroinflammation at the local injured nerve reveals persistent upregulation of multiple genes involving oxysterol metabolism, neuronal apoptosis, and proliferation after nerve release. Further validation of the independent roles of each signal pathway will contribute to molecular therapies for compressive neuropathy in the future.
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