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Awad-Igbaria Y, Ferreira N, Keadan A, Sakas R, Edelman D, Shamir A, Francous-Soustiel J, Palzur E. HBO treatment enhances motor function and modulates pain development after sciatic nerve injury via protection the mitochondrial function. J Transl Med 2023; 21:545. [PMID: 37582750 PMCID: PMC10428612 DOI: 10.1186/s12967-023-04414-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 08/02/2023] [Indexed: 08/17/2023] Open
Abstract
BACKGROUND Peripheral nerve injury can cause neuroinflammation and neuromodulation that lead to mitochondrial dysfunction and neuronal apoptosis in the dorsal root ganglion (DRG) and spinal cord, contributing to neuropathic pain and motor dysfunction. Hyperbaric oxygen therapy (HBOT) has been suggested as a potential therapeutic tool for neuropathic pain and nerve injury. However, the specific cellular and molecular mechanism by which HBOT modulates the development of neuropathic pain and motor dysfunction through mitochondrial protection is still unclear. METHODS Mechanical and thermal allodynia and motor function were measured in rats following sciatic nerve crush (SNC). The HBO treatment (2.5 ATA) was performed 4 h after SNC and twice daily (12 h intervals) for seven consecutive days. To assess mitochondrial function in the spinal cord (L2-L6), high-resolution respirometry was measured on day 7 using the OROBOROS-O2k. In addition, RT-PCR and Immunohistochemistry were performed at the end of the experiment to assess neuroinflammation, neuromodulation, and apoptosis in the DRG (L3-L6) and spinal cord (L2-L6). RESULTS HBOT during the early phase of the SNC alleviates mechanical and thermal hypersensitivity and motor dysfunction. Moreover, HBOT modulates neuroinflammation, neuromodulation, mitochondrial stress, and apoptosis in the DRG and spinal cord. Thus, we found a significant reduction in the presence of macrophages/microglia and MMP-9 expression, as well as the transcription of pro-inflammatory cytokines (TNFa, IL-6, IL-1b) in the DRG and (IL6) in the spinal cord of the SNC group that was treated with HBOT compared to the untreated group. Notable, the overexpression of the TRPV1 channel, which has a high Ca2+ permeability, was reduced along with the apoptosis marker (cleaved-Caspase3) and mitochondrial stress marker (TSPO) in the DRG and spinal cord of the HBOT group. Additionally, HBOT prevents the reduction in mitochondrial respiration, including non-phosphorylation state, ATP-linked respiration, and maximal mitochondrial respiration in the spinal cord after SNC. CONCLUSION Mitochondrial dysfunction in peripheral neuropathic pain was found to be mediated by neuroinflammation and neuromodulation. Strikingly, our findings indicate that HBOT during the critical period of the nerve injury modulates the transition from acute to chronic pain via reducing neuroinflammation and protecting mitochondrial function, consequently preventing neuronal apoptosis in the DRG and spinal cord.
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Affiliation(s)
- Yaseen Awad-Igbaria
- Azrieli Faculty of Medicine, Bar-Ilan University, Zefat, Israel.
- Research Institute of Galilee Medical Center, P.O.B 21, 22100, Nahariya, Israel.
| | - Nadine Ferreira
- Psychobiology Research Laboratory, Mazor Mental Health Center, Akko, Israel
| | - Ali Keadan
- Research Institute of Galilee Medical Center, P.O.B 21, 22100, Nahariya, Israel
| | - Reem Sakas
- Azrieli Faculty of Medicine, Bar-Ilan University, Zefat, Israel
- Research Institute of Galilee Medical Center, P.O.B 21, 22100, Nahariya, Israel
| | - Doron Edelman
- UHN-Neurosurgery Spine Program, Toronto Western Hospital, University of Toronto, Toronto, ON, Canada
| | - Alon Shamir
- Psychobiology Research Laboratory, Mazor Mental Health Center, Akko, Israel
- Ruth and Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Jean Francous-Soustiel
- Azrieli Faculty of Medicine, Bar-Ilan University, Zefat, Israel
- Research Institute of Galilee Medical Center, P.O.B 21, 22100, Nahariya, Israel
- Department of Neurosurgery, Galilee Medical Center, Nahariya, Israel
| | - Eilam Palzur
- Research Institute of Galilee Medical Center, P.O.B 21, 22100, Nahariya, Israel
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Mitochondrial bioenergetics, glial reactivity, and pain-related behavior can be restored by dichloroacetate treatment in rodent pain models. Pain 2020; 161:2786-2797. [PMID: 32658145 DOI: 10.1097/j.pain.0000000000001992] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Glial reactivity in the dorsal horn of the spinal cord is a hallmark in most chronic pain conditions. Neuroinflammation-associated reactive glia, in particular astrocytes, have been shown to exhibit reduced mitochondrial respiratory function. Here, we studied the mitochondrial function at the lumbar spinal cord tissue from complete Freund's adjuvant-induced inflammatory pain rat and chronic constriction injury mouse models by high-resolution respirometry. A significant decrease in mitochondrial bioenergetic parameters at the injury-related spinal cord level coincided with highest astrocytosis. Oral administration of dichloroacetate (DCA) significantly increased mitochondrial respiratory function by inhibiting pyruvate dehydrogenase kinase and decreased glial fibrillary acidic protein and Iba-1 immunoreactivity in spinal cord. Importantly, DCA treatment significantly reduced the ipsilateral pain-related behavior without affecting contralateral sensitivity in both pain models. Our results indicate that mitochondrial metabolic modulation with DCA may offer an alternative therapeutic strategy to alleviate chronic and persistent inflammatory pain.
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Keilhoff G, Mbou RP, Lucas B, Schild L. The Differentiation of Spinal Cord Motor Neurons is Associated with Changes of the Mitochondrial Phospholipid Cardiolipin. Neuroscience 2019; 400:169-183. [DOI: 10.1016/j.neuroscience.2019.01.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 01/04/2019] [Accepted: 01/07/2019] [Indexed: 01/09/2023]
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Wang J, Li Y, Gao L, Yan F, Gao G, Li L. GSK-3β Inhibitor Alsterpaullone Attenuates MPP +-Induced Cell Damage in a c-Myc-Dependent Manner in SH-SY5Y Cells. Front Cell Neurosci 2018; 12:283. [PMID: 30233322 PMCID: PMC6127625 DOI: 10.3389/fncel.2018.00283] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 08/09/2018] [Indexed: 12/13/2022] Open
Abstract
Mitochondrial dysfunction plays significant roles in the pathogenesis of Parkinson’s Disease (PD). The inactivation of c-Myc, a down-stream gene of Wnt/β-catenin signaling, may contribute to the mitochondria dysfunction. Inhibition of glycogen synthase kinase 3β (GSK-3β) with Alsterpaullone (Als) can activate the down-stream events of Wnt signaling. Here, we investigated the protective roles of Als against MPP+-induced cell apoptosis in SH-SY5Y cells. The data showed that Als effectively rescued c-Myc from the MPP+-induced decline via Wnt signaling. Furthermore, Als protected SH-SY5Y cells from the MPP+-induced mitochondrial fission and cell apoptosis. However, the protective roles of Als were lost under β-catenin-deficient conditions. These findings indicate that Als, a GSK-3β inhibitor, attenuated the MPP+-induced mitochondria-dependent apoptotic via up-regulation of the Wnt signaling.
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Affiliation(s)
- Jiancai Wang
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Yuqian Li
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Li Gao
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Fengqi Yan
- Department of Urology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Guodong Gao
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Lihong Li
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
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Jin GL, Yue RC, He SD, Hong LM, Xu Y, Yu CX. Koumine Decreases Astrocyte-Mediated Neuroinflammation and Enhances Autophagy, Contributing to Neuropathic Pain From Chronic Constriction Injury in Rats. Front Pharmacol 2018; 9:989. [PMID: 30214411 PMCID: PMC6125371 DOI: 10.3389/fphar.2018.00989] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 08/10/2018] [Indexed: 01/23/2023] Open
Abstract
Koumine, an indole alkaloid, is a major bioactive component of Gelsemium elegans. Previous studies have demonstrated that koumine has noticeable anti-inflammatory and analgesic effects in inflammatory and neuropathic pain (NP) models, but the mechanisms involved are not well understood. This study was designed to explore the analgesic effect of koumine on chronic constriction injury (CCI)-induced NP in rats and the underlying mechanisms, including astrocyte autophagy and apoptosis in the spinal cord. Rats with CCI-induced NP were used to evaluate the analgesic and anti-inflammatory effects of koumine. Lipopolysaccharide (LPS)-induced inflammation in rat primary astrocytes was also used to evaluate the anti-inflammatory effect of koumine. We found that repeated treatment with koumine significantly reduced and inhibited CCI-evoked astrocyte activation as well as the levels of pro-inflammatory cytokines. Meanwhile, we found that koumine promoted autophagy in the spinal cord of CCI rats, as reflected by decreases in the LC3-II/I ratio and P62 expression. Double immunofluorescence staining showed a high level of colocalization between LC3 and GFAP-positive glia cells, which could be decreased by koumine. Intrathecal injection of an autophagy inhibitor (chloroquine) reversed the analgesic effect of koumine, as well as the inhibitory effect of koumine on astrocyte activation in the spinal cord. In addition, TUNEL staining suggested that CCI-induced apoptosis was inhibited by koumine, and this inhibition could be abolished by chloroquine. Western blot analysis revealed that koumine significantly increased the level of Bcl-xl while inhibiting Bax expression and decreasing cleaved caspase-3. In addition, we found that koumine could decrease astrocyte-mediated neuroinflammation and enhance autophagy in primary cultured astrocytes. These results suggest that the analgesic effects of koumine on CCI-induced NP may involve inhibition of astrocyte activation and pro-inflammatory cytokine release, which may relate to the promotion of astrocyte autophagy and the inhibition for apoptosis in the spinal cord.
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Affiliation(s)
- Gui-Lin Jin
- Department of Pharmacology, College of Pharmacy, Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Natural Medicine Pharmacology, College of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Rong-Cai Yue
- Department of Pharmacology, College of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Sai-di He
- Department of Pharmacology, College of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Li-Mian Hong
- Department of Pharmacology, College of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Ying Xu
- Department of Pharmacology, College of Pharmacy, Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Natural Medicine Pharmacology, College of Pharmacy, Fujian Medical University, Fuzhou, China
| | - Chang-Xi Yu
- Department of Pharmacology, College of Pharmacy, Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Natural Medicine Pharmacology, College of Pharmacy, Fujian Medical University, Fuzhou, China
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Zhao L, Li D, Liu N, Liu L, Zhang Z, Gao C, Kawano H, Zhou FY, Li HP. Correlation of TGN-020 with the analgesic effects via ERK pathway activation after chronic constriction injury. Mol Pain 2018; 14:1744806918796057. [PMID: 30152258 PMCID: PMC6113736 DOI: 10.1177/1744806918796057] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 07/17/2018] [Accepted: 07/27/2018] [Indexed: 02/06/2023] Open
Abstract
Extracellular regulated protein kinase (ERK) pathway activation in astrocytes and neurons has been reported to be critical for neuropathic pain development after chronic constriction injury. TGN-020 was found to be the most potent aquaporin 4 inhibitor among the agents studied. The present study aimed to assess whether the inhibition of aquaporin 4 had an analgesic effect on neuropathic pain and whether the inhibition of astrocytic activation and ERK pathway was involved in the analgesic effect of TGN-020. We thus found that TGN-020 upregulated the threshold of thermal and mechanical allodynia, downregulated the expression of interleukin-1β, interleukin-6, and tumor necrosis factor-α, attenuated the astrocytic activation and suppressed the activation of mitogen-activated protein kinase pathways in the spinal dorsal horn and dorsal root ganglion. Additionally, TGN-020 suppressed ERK phosphorylation in astrocytes and neurons after injury. The findings suggested that the analgesic effects of TGN-020 in neuropathic pain were mediated mainly by the downregulation of chronic constriction injury-induced astrocytic activation and inflammation, which is via the inhibition of ERK pathway in the spinal dorsal horn and dorsal root ganglion.
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Affiliation(s)
- Liang Zhao
- Department of Human Anatomy, College of Basic Medical Sciences,
China Medical University, Shenyang, China
- Department of Orthopedic Surgery, Shenyang Fifth People’s
Hospital, Shenyang, China
| | - Dan Li
- Department of Human Anatomy, College of Basic Medical Sciences,
China Medical University, Shenyang, China
| | - Nan Liu
- Department of Human Anatomy, College of Basic Medical Sciences,
China Medical University, Shenyang, China
| | - Lu Liu
- Department of Human Anatomy, College of Basic Medical Sciences,
China Medical University, Shenyang, China
| | - Zhuo Zhang
- Department of Human Anatomy, College of Basic Medical Sciences,
China Medical University, Shenyang, China
| | - Chao Gao
- Department of Human Anatomy, College of Basic Medical Sciences,
China Medical University, Shenyang, China
| | - Hitoshi Kawano
- Department of Health and Dietetics, Faculty of Health and
Medical Science, Teikyo Heisei University, Tokyo, Japan
| | - Fang-Yuan Zhou
- Department of Human Anatomy, College of Basic Medical Sciences,
China Medical University, Shenyang, China
| | - Hong-Peng Li
- Department of Human Anatomy, College of Basic Medical Sciences,
China Medical University, Shenyang, China
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