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Brown RI, Barber HM, Kucenas S. Satellite glial cell manipulation prior to axotomy enhances developing dorsal root ganglion central branch regrowth into the spinal cord. Glia 2024; 72:1766-1784. [PMID: 39141572 PMCID: PMC11325082 DOI: 10.1002/glia.24581] [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: 12/05/2023] [Revised: 05/30/2024] [Accepted: 06/02/2024] [Indexed: 08/16/2024]
Abstract
The central and peripheral nervous systems (CNS and PNS, respectively) exhibit remarkable diversity in the capacity to regenerate following neuronal injury with PNS injuries being much more likely to regenerate than those that occur in the CNS. Glial responses to damage greatly influence the likelihood of regeneration by either promoting or inhibiting axonal regrowth over time. However, despite our understanding of how some glial lineages participate in nerve degeneration and regeneration, less is known about the contributions of peripheral satellite glial cells (SGC) to regeneration failure following central axon branch injury of dorsal root ganglia (DRG) sensory neurons. Here, using in vivo, time-lapse imaging in larval zebrafish coupled with laser axotomy, we investigate the role of SGCs in axonal regeneration. In our studies we show that SGCs respond to injury by relocating their nuclei to the injury site during the same period that DRG neurons produce new central branch neurites. Laser ablation of SGCs prior to axon injury results in more neurite growth attempts and ultimately a higher rate of successful central axon regrowth, implicating SGCs as inhibitors of regeneration. We also demonstrate that this SGC response is mediated in part by ErbB signaling, as chemical inhibition of this receptor results in reduced SGC motility and enhanced central axon regrowth. These findings provide new insights into SGC-neuron interactions under injury conditions and how these interactions influence nervous system repair.
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Affiliation(s)
- Robin I Brown
- Department of Biology, University of Virginia, Charlottesville, Virginia, USA
- Program in Fundamental Neuroscience, University of Virginia, Charlottesville, Virginia, USA
| | - Heather M Barber
- Program in Fundamental Neuroscience, University of Virginia, Charlottesville, Virginia, USA
- Cell & Developmental Biology Graduate Program, University of Virginia, Charlottesville, Virginia, USA
| | - Sarah Kucenas
- Department of Biology, University of Virginia, Charlottesville, Virginia, USA
- Program in Fundamental Neuroscience, University of Virginia, Charlottesville, Virginia, USA
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2
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Denaro S, D'Aprile S, Torrisi F, Zappalà A, Marrazzo A, Al-Khrasani M, Pasquinucci L, Vicario N, Parenti R, Parenti C. Sigma-1 receptor targeting inhibits connexin 43 based intercellular communication in chronic neuropathic pain. Inflamm Res 2024:10.1007/s00011-024-01926-0. [PMID: 39095656 DOI: 10.1007/s00011-024-01926-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Revised: 06/11/2024] [Accepted: 07/25/2024] [Indexed: 08/04/2024] Open
Abstract
BACKGROUND AND OBJECTIVE Neuropathic pain is a chronic condition characterized by aberrant signaling within the somatosensory system, affecting millions of people worldwide with limited treatment options. Herein, we aim at investigating the potential of a sigma-1 receptor (σ1R) antagonist in managing neuropathic pain. METHODS A Chronic Constriction Injury (CCI) model was used to induce neuropathic pain. The potential of (+)-MR200 was evaluated following daily subcutaneous injections of the compound. Its mechanism of action was confirmed by administration of a well-known σ1R agonist, PRE084. RESULTS (+)-MR200 demonstrated efficacy in protecting neurons from damage and alleviating pain hypersensitivity in CCI model. Our results suggest that (+)-MR200 reduced the activation of astrocytes and microglia, cells known to contribute to the neuroinflammatory process, suggesting that (+)-MR200 may not only address pain symptoms but also tackle the underlying cellular mechanism involved. Furthermore, (+)-MR200 treatment normalized levels of the gap junction (GJ)-forming protein connexin 43 (Cx43), suggesting a reduction in harmful intercellular communication that could fuel the chronicity of pain. CONCLUSIONS This approach could offer a neuroprotective strategy for managing neuropathic pain, addressing both pain symptoms and cellular processes driving the condition. Understanding the dynamics of σ1R expression and function in neuropathic pain is crucial for clinical intervention.
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Affiliation(s)
- Simona Denaro
- Section of Physiology, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123, Catania, Italy
| | - Simona D'Aprile
- Section of Physiology, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123, Catania, Italy
| | - Filippo Torrisi
- Department of Medicine and Surgery, University of Enna "Kore", 94100, Enna, Italy
| | - Agata Zappalà
- Section of Physiology, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123, Catania, Italy
| | - Agostino Marrazzo
- Section of Medicinal Chemistry, Department of Drug and Health Sciences, University of Catania, 95123, Catania, Italy
| | - Mahmoud Al-Khrasani
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, Semmelweis University, Budapest, Hungary
| | - Lorella Pasquinucci
- Section of Medicinal Chemistry, Department of Drug and Health Sciences, University of Catania, 95123, Catania, Italy.
| | - Nunzio Vicario
- Section of Physiology, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123, Catania, Italy.
| | - Rosalba Parenti
- Section of Physiology, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123, Catania, Italy
| | - Carmela Parenti
- Section of Pharmacology and Toxicology, Department of Drug and Health Sciences, University of Catania, 95123, Catania, Italy
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3
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WU Z, ZHU Q, KONG L, SONG P, ZHOU X, GUO G, ZHANG S, HE T, CHENG Y, FANG M. Tuina alleviates neuropathic pain through regulate the activation of microglia and the secretion of inflammatory cytokine in spinal cord. J TRADIT CHIN MED 2024; 44:762-769. [PMID: 39066537 PMCID: PMC11337246 DOI: 10.19852/j.cnki.jtcm.20240515.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 07/14/2023] [Indexed: 07/28/2024]
Abstract
OBJECTIVE To observe the analgesic effects of Tuina on neuropathic pain (NPP) and the underlying mechanisms. METHODS Forty-eight Sprague-Dawley (SD) rats were assigned by random into three treatment groups: sham, chronic constriction injury (CCI), and Tuina. Each group contained sixteen rats. CCI model was generated by ligating the right sciatic nerve. Behavioral changes of CCI were assessed by the paw withdrawal threshold (PWT) and paw withdrawal latency (PWL). In addition, biochemical techniques such as immunofluorescence staining, enzyme-linked immunosorbent assay (ELISA) and Western blotting were used to profile levels of microglia activation and inflammatory factors in the spinal dorsal horn (SDH) of rats. Tuina (clockwise pressing and rubbing) was performed at Chengshan (BL57) to observe the analgesic effects on CCI rats and the underlying mechanisms. RESULTS Rats with CCI experienced significant reduction in the PWT and PWL of the right hind paw relative to CCI group at day 3. Tuina treatment rescued this situation significantly on days 10 and 14. Besides, Iba-1, microglia M1 receptor CD68, tumor necrosis factor-α (TNF-α), and interleukin-1β (IL-1β) were higher in the right SDH for CCI group compared to the sham group on day 14. As expected, Tuina partially downregulated the CCI-induced overexpressed Iba-1, CD68, TNF-α, and IL-1β in the SDH of CCI model. CONCLUSION Tuina induces a time-dependent cumulative analgesic effect in CCI rats by inhibiting the activation of microglia and the secretion of IL-1β and TNF-α in SDH.
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Affiliation(s)
- Zhiwei WU
- 1 Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 200437, China
- 2 Institute of Tuina, Shanghai Institute of Traditional Chinese Medicine, Shanghai 200437, China
| | - Qingguang ZHU
- 1 Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 200437, China
- 2 Institute of Tuina, Shanghai Institute of Traditional Chinese Medicine, Shanghai 200437, China
| | - Lingjun KONG
- 3 Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200021, China
| | - Pengfei SONG
- 3 Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200021, China
| | - Xin ZHOU
- 1 Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 200437, China
- 2 Institute of Tuina, Shanghai Institute of Traditional Chinese Medicine, Shanghai 200437, China
| | - Guangxin GUO
- 4 Department of Acupuncture and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Shuaipan ZHANG
- 3 Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200021, China
| | - Tianxiang HE
- 3 Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200021, China
| | - Yanbin CHENG
- 1 Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 200437, China
- 2 Institute of Tuina, Shanghai Institute of Traditional Chinese Medicine, Shanghai 200437, China
| | - Min FANG
- 1 Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 200437, China
- 2 Institute of Tuina, Shanghai Institute of Traditional Chinese Medicine, Shanghai 200437, China
- 3 Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200021, China
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4
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Qiao LY. Satellite Glial Cells Bridge Sensory Neuron Crosstalk in Visceral Pain and Cross-Organ Sensitization. J Pharmacol Exp Ther 2024; 390:213-221. [PMID: 38777604 PMCID: PMC11264254 DOI: 10.1124/jpet.123.002061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 05/07/2024] [Accepted: 05/08/2024] [Indexed: 05/25/2024] Open
Abstract
Following colonic inflammation, the uninjured bladder afferent neurons are also activated. The mechanisms and pathways underlying this sensory neuron cross-activation (from injured neurons to uninjured neurons) are not fully understood. Colonic and bladder afferent neurons reside in the same spinal segments and are separated by satellite glial cells (SGCs) and extracellular matrix in dorsal root ganglia (DRG). SGCs communicate with sensory neurons in a bidirectional fashion. This review summarizes the differentially regulated genes/proteins in the injured and uninjured DRG neurons and explores the role of SGCs in regulation of sensory neuron crosstalk in visceral cross-organ sensitization. The review also highlights the paracrine pathways in mediating neuron-SGC and SGC-neuron coupling with an emphasis on the neurotrophins and purinergic systems. Finally, I discuss the results from recent RNAseq profiling of SGCs to reveal useful molecular markers for characterization, functional study, and therapeutic targets of SGCs. SIGNIFICANCE STATEMENT: Satellite glial cells (SGCs) are the largest glial subtypes in sensory ganglia and play a critical role in mediating sensory neuron crosstalk, an underlying mechanism in colon-bladder cross-sensitization. Identification of novel and unique molecular markers of SGCs can advance the discovery of therapeutic targets in treatment of chronic pain including visceral pain comorbidity.
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Affiliation(s)
- Liya Y Qiao
- Department of Physiology and Biophysics, Department of Internal Medicine, Virginia Commonwealth University School of Medicine, Richmond, Virginia
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5
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Testa L, Dotta S, Vercelli A, Marvaldi L. Communicating pain: emerging axonal signaling in peripheral neuropathic pain. Front Neuroanat 2024; 18:1398400. [PMID: 39045347 PMCID: PMC11265228 DOI: 10.3389/fnana.2024.1398400] [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: 03/09/2024] [Accepted: 05/21/2024] [Indexed: 07/25/2024] Open
Abstract
Peripheral nerve damage often leads to the onset of neuropathic pain (NeuP). This condition afflicts millions of people, significantly burdening healthcare systems and putting strain on families' financial well-being. Here, we will focus on the role of peripheral sensory neurons, specifically the Dorsal Root Ganglia neurons (DRG neurons) in the development of NeuP. After axotomy, DRG neurons activate regenerative signals of axons-soma communication to promote a gene program that activates an axonal branching and elongation processes. The results of a neuronal morphological cytoskeleton change are not always associated with functional recovery. Moreover, any axonal miss-targeting may contribute to NeuP development. In this review, we will explore the epidemiology of NeuP and its molecular causes at the level of the peripheral nervous system and the target organs, with major focus on the neuronal cross-talk between intrinsic and extrinsic factors. Specifically, we will describe how failures in the neuronal regenerative program can exacerbate NeuP.
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Affiliation(s)
- Livia Testa
- Neuroscience Institute Cavalieri Ottolenghi, Orbassano (Torino), Torino, Italy
- Department of Neuroscience “Rita Levi-Montalcini”, Torino, Italy
| | - Sofia Dotta
- Neuroscience Institute Cavalieri Ottolenghi, Orbassano (Torino), Torino, Italy
- Department of Neuroscience “Rita Levi-Montalcini”, Torino, Italy
| | - Alessandro Vercelli
- Neuroscience Institute Cavalieri Ottolenghi, Orbassano (Torino), Torino, Italy
- Department of Neuroscience “Rita Levi-Montalcini”, Torino, Italy
| | - Letizia Marvaldi
- Neuroscience Institute Cavalieri Ottolenghi, Orbassano (Torino), Torino, Italy
- Department of Neuroscience “Rita Levi-Montalcini”, Torino, Italy
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6
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Su Y, Verkhratsky A, Yi C. Targeting connexins: possible game changer in managing neuropathic pain? Trends Mol Med 2024; 30:642-659. [PMID: 38594094 DOI: 10.1016/j.molmed.2024.03.009] [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: 01/23/2024] [Revised: 03/08/2024] [Accepted: 03/18/2024] [Indexed: 04/11/2024]
Abstract
Neuropathic pain is a chronic debilitating condition caused by nerve injury or a variety of diseases. At the core of neuropathic pain lies the aberrant neuronal excitability in the peripheral and/or central nervous system (PNS and CNS). Enhanced connexin expression and abnormal activation of connexin-assembled gap junctional channels are prominent in neuropathic pain along with reactive gliosis, contributing to neuronal hypersensitivity and hyperexcitability. In this review, we delve into the current understanding of how connexin expression and function contribute to the pathogenesis and pathophysiology of neuropathic pain and argue for connexins as potential therapeutic targets for neuropathic pain management.
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Affiliation(s)
- Yixun Su
- Research Centre, Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China
| | - Alexei Verkhratsky
- Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK; Achucarro Center for Neuroscience, IKERBASQUE, Bilbao, Spain; Department of Stem Cell Biology, State Research Institute Centre for Innovative Medicine, Vilnius, Lithuania; Department of Forensic Analytical Toxicology, School of Forensic Medicine, China Medical University, Shenyang, China.
| | - Chenju Yi
- Research Centre, Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, China; Guangdong Provincial Key Laboratory of Brain Function and Disease, Guangzhou, China; Shenzhen Key Laboratory of Chinese Medicine Active substance screening and Translational Research, Shenzhen, China.
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7
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Li X, Prudente AS, Prato V, Guo X, Hao H, Jones F, Figoli S, Mullen P, Wang Y, Tonello R, Lee SH, Shah S, Maffei B, Berta T, Du X, Gamper N. Peripheral gating of mechanosensation by glial diazepam binding inhibitor. J Clin Invest 2024; 134:e176227. [PMID: 38888973 PMCID: PMC11324294 DOI: 10.1172/jci176227] [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: 09/27/2023] [Accepted: 06/13/2024] [Indexed: 06/20/2024] Open
Abstract
We report that diazepam binding inhibitor (DBI) is a glial messenger mediating crosstalk between satellite glial cells (SGCs) and sensory neurons in the dorsal root ganglion (DRG). DBI is highly expressed in SGCs of mice, rats, and humans, but not in sensory neurons or most other DRG-resident cells. Knockdown of DBI results in a robust mechanical hypersensitivity without major effects on other sensory modalities. In vivo overexpression of DBI in SGCs reduces sensitivity to mechanical stimulation and alleviates mechanical allodynia in neuropathic and inflammatory pain models. We further show that DBI acts as an unconventional agonist and positive allosteric modulator at the neuronal GABAA receptors, particularly strongly affecting those with a high-affinity benzodiazepine binding site. Such receptors are selectively expressed by a subpopulation of mechanosensitive DRG neurons, and these are also more enwrapped with DBI-expressing glia, as compared with other DRG neurons, suggesting a mechanism for a specific effect of DBI on mechanosensation. These findings identified a communication mechanism between peripheral neurons and SGCs. This communication modulates pain signaling and can be targeted therapeutically.
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Affiliation(s)
- Xinmeng Li
- Department of Pharmacology; The Key Laboratory of Neural and Vascular Biology, Ministry of Education; The Key Laboratory of New Drug Pharmacology and Toxicology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Arthur Silveira Prudente
- Pain Research Center, Department of Anesthesiology, University of Cincinnati Medical Center, Cincinnati, Ohio, USA
| | - Vincenzo Prato
- Faculty of Biological Sciences, School of Biomedical Sciences, University of Leeds, Leeds, United Kingdom
| | - Xianchuan Guo
- Department of Pharmacology; The Key Laboratory of Neural and Vascular Biology, Ministry of Education; The Key Laboratory of New Drug Pharmacology and Toxicology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Han Hao
- Department of Pharmacology; The Key Laboratory of Neural and Vascular Biology, Ministry of Education; The Key Laboratory of New Drug Pharmacology and Toxicology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Frederick Jones
- Faculty of Biological Sciences, School of Biomedical Sciences, University of Leeds, Leeds, United Kingdom
- Department of Life Sciences, Manchester Metropolitan University, Manchester, United Kingdom
| | - Sofia Figoli
- Faculty of Biological Sciences, School of Biomedical Sciences, University of Leeds, Leeds, United Kingdom
| | - Pierce Mullen
- Faculty of Biological Sciences, School of Biomedical Sciences, University of Leeds, Leeds, United Kingdom
| | - Yujin Wang
- Department of Pharmacology; The Key Laboratory of Neural and Vascular Biology, Ministry of Education; The Key Laboratory of New Drug Pharmacology and Toxicology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Raquel Tonello
- Pain Research Center, Department of Anesthesiology, University of Cincinnati Medical Center, Cincinnati, Ohio, USA
| | - Sang Hoon Lee
- Pain Research Center, Department of Anesthesiology, University of Cincinnati Medical Center, Cincinnati, Ohio, USA
| | - Shihab Shah
- Faculty of Biological Sciences, School of Biomedical Sciences, University of Leeds, Leeds, United Kingdom
| | - Benito Maffei
- Faculty of Biological Sciences, School of Biomedical Sciences, University of Leeds, Leeds, United Kingdom
| | - Temugin Berta
- Pain Research Center, Department of Anesthesiology, University of Cincinnati Medical Center, Cincinnati, Ohio, USA
| | - Xiaona Du
- Department of Pharmacology; The Key Laboratory of Neural and Vascular Biology, Ministry of Education; The Key Laboratory of New Drug Pharmacology and Toxicology, Hebei Medical University, Shijiazhuang, Hebei, China
| | - Nikita Gamper
- Department of Pharmacology; The Key Laboratory of Neural and Vascular Biology, Ministry of Education; The Key Laboratory of New Drug Pharmacology and Toxicology, Hebei Medical University, Shijiazhuang, Hebei, China
- Faculty of Biological Sciences, School of Biomedical Sciences, University of Leeds, Leeds, United Kingdom
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8
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Tiwari N, Smith C, Sharma D, Shen S, Mehta P, Qiao LY. Plp1-expresssing perineuronal DRG cells facilitate colonic and somatic chronic mechanical pain involving Piezo2 upregulation in DRG neurons. Cell Rep 2024; 43:114230. [PMID: 38743566 PMCID: PMC11234328 DOI: 10.1016/j.celrep.2024.114230] [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: 11/07/2023] [Revised: 03/06/2024] [Accepted: 04/26/2024] [Indexed: 05/16/2024] Open
Abstract
Satellite glial cells (SGCs) of dorsal root ganglia (DRGs) are activated in a variety of chronic pain conditions; however, their mediation roles in pain remain elusive. Here, we take advantage of proteolipid protein (PLP)/creERT-driven recombination in the periphery mainly occurring in SGCs of DRGs to assess the role of SGCs in the regulation of chronic mechanical hypersensitivity and pain-like responses in two organs, the distal colon and hindpaw, to test generality. We show that PLP/creERT-driven hM3Dq activation increases, and PLP/creERT-driven TrkB.T1 deletion attenuates, colon and hindpaw chronic mechanical hypersensitivity, positively associating with calcitonin gene-related peptide (CGRP) expression in DRGs and phospho-cAMP response element-binding protein (CREB) expression in the dorsal horn of the spinal cord. Activation of Plp1+ DRG cells also increases the number of small DRG neurons expressing Piezo2 and acquiring mechanosensitivity and leads to peripheral organ neurogenic inflammation. These findings unravel a role and mechanism of Plp1+ cells, mainly SGCs, in the facilitation of chronic mechanical pain and suggest therapeutic targets for pain mitigation.
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Affiliation(s)
- Namrata Tiwari
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298-0551, USA
| | - Cristina Smith
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298-0551, USA
| | - Divya Sharma
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298-0551, USA
| | - Shanwei Shen
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298-0551, USA
| | - Parshva Mehta
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298-0551, USA
| | - Liya Y Qiao
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298-0551, USA.
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9
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Denaro S, Pasquinucci L, Turnaturi R, Alberghina C, Longhitano L, Giallongo S, Costanzo G, Spoto S, Grasso M, Zappalà A, Li Volti G, Tibullo D, Vicario N, Parenti R, Parenti C. Sigma-1 Receptor Inhibition Reduces Mechanical Allodynia and Modulate Neuroinflammation in Chronic Neuropathic Pain. Mol Neurobiol 2024; 61:2672-2685. [PMID: 37922065 PMCID: PMC11043107 DOI: 10.1007/s12035-023-03717-w] [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: 06/21/2023] [Accepted: 10/17/2023] [Indexed: 11/05/2023]
Abstract
Neuropathic pain is one of the most debilitating forms of chronic pain, resulting from an injury or disease of the somatosensory nervous system, which induces abnormal painful sensations including allodynia and hyperalgesia. Available treatments are limited by severe side-effects and reduced efficacy in the chronic phase of the disease. Sigma-1 receptor (σ1R) has been identified as a chaperone protein, which modulate opioid receptors activities and the functioning of several ion channels, exerting a role in pain transmission. As such, it represents a druggable target to treat neuropathic pain. This study aims at investigating the therapeutic potential of the novel compound (+)-2R/S-LP2, a σ1R antagonist, in reducing painful behaviour and modulating the neuroinflammatory environment. We showed that repeated administration of the compound significantly inhibited mechanical allodynia in neuropathic rats, increasing the withdrawal threshold as compared to CCI-vehicle rats. Moreover, we found that (+)-2R/S-LP2-mediated effects resolve the neuroinflammatory microenvironment by reducing central gliosis and pro-inflammatory cytokines expression levels. This effect was coupled with a significant reduction of connexin 43 (Cx43) expression levels and gap junctions/hemichannels mediated microglia-to-astrocyte communication. These results suggest that inhibition of σ1R significantly attenuates neuropathic pain chronicization, thus representing a viable effective strategy.
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Affiliation(s)
- Simona Denaro
- Section of Physiology, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123, Catania, Italy
| | - Lorella Pasquinucci
- Section of Medicinal Chemistry, Department of Drug and Health Sciences, University of Catania, 95123, Catania, Italy
| | - Rita Turnaturi
- Section of Medicinal Chemistry, Department of Drug and Health Sciences, University of Catania, 95123, Catania, Italy
| | - Cristiana Alberghina
- Section of Physiology, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123, Catania, Italy
| | - Lucia Longhitano
- Section of Biochemistry, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123, Catania, Italy
| | - Sebastiano Giallongo
- Section of Biochemistry, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123, Catania, Italy
| | - Giuliana Costanzo
- Section of Medicinal Chemistry, Department of Drug and Health Sciences, University of Catania, 95123, Catania, Italy
| | - Salvatore Spoto
- Section of Pharmacology and Toxicology, Department of Drug and Health Sciences, University of Catania, 95123, Catania, Italy
| | - Margherita Grasso
- Unit of Neuropharmacology and Translational Neurosciences, Oasi Research Institute-IRCCS, 94018, Troina, Italy
| | - Agata Zappalà
- Section of Physiology, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123, Catania, Italy
| | - Giovanni Li Volti
- Section of Biochemistry, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123, Catania, Italy
| | - Daniele Tibullo
- Section of Biochemistry, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123, Catania, Italy
| | - Nunzio Vicario
- Section of Physiology, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123, Catania, Italy.
| | - Rosalba Parenti
- Section of Physiology, Department of Biomedical and Biotechnological Sciences, University of Catania, 95123, Catania, Italy.
| | - Carmela Parenti
- Section of Pharmacology and Toxicology, Department of Drug and Health Sciences, University of Catania, 95123, Catania, Italy
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10
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Bang S, Jiang C, Xu J, Chandra S, McGinnis A, Luo X, He Q, Li Y, Wang Z, Ao X, Parisien M, Fernandes de Araujo LO, Jahangiri Esfahani S, Zhang Q, Tonello R, Berta T, Diatchenko L, Ji RR. Satellite glial GPR37L1 and its ligand maresin 1 regulate potassium channel signaling and pain homeostasis. J Clin Invest 2024; 134:e173537. [PMID: 38530364 PMCID: PMC11060744 DOI: 10.1172/jci173537] [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: 06/29/2023] [Accepted: 03/12/2024] [Indexed: 03/27/2024] Open
Abstract
G protein-coupled receptor 37-like 1 (GPR37L1) is an orphan GPCR with largely unknown functions. Here, we report that Gpr37l1/GRP37L1 ranks among the most highly expressed GPCR transcripts in mouse and human dorsal root ganglia (DRGs) and is selectively expressed in satellite glial cells (SGCs). Peripheral neuropathy induced by streptozotoxin (STZ) and paclitaxel (PTX) led to reduced GPR37L1 expression on the plasma membrane in mouse and human DRGs. Transgenic mice with Gpr37l1 deficiency exhibited impaired resolution of neuropathic pain symptoms following PTX- and STZ-induced pain, whereas overexpression of Gpr37l1 in mouse DRGs reversed pain. GPR37L1 is coexpressed with potassium channels, including KCNJ10 (Kir4.1) in mouse SGCs and both KCNJ3 (Kir3.1) and KCNJ10 in human SGCs. GPR37L1 regulates the surface expression and function of the potassium channels. Notably, the proresolving lipid mediator maresin 1 (MaR1) serves as a ligand of GPR37L1 and enhances KCNJ10- or KCNJ3-mediated potassium influx in SGCs through GPR37L1. Chemotherapy suppressed KCNJ10 expression and function in SGCs, which MaR1 rescued through GPR37L1. Finally, genetic analysis revealed that the GPR37L1-E296K variant increased chronic pain risk by destabilizing the protein and impairing the protein's function. Thus, GPR37L1 in SGCs offers a therapeutic target for the protection of neuropathy and chronic pain.
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Affiliation(s)
- Sangsu Bang
- Center for Translational Pain Medicine, Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Changyu Jiang
- Center for Translational Pain Medicine, Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Jing Xu
- Center for Translational Pain Medicine, Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Sharat Chandra
- Center for Translational Pain Medicine, Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Aidan McGinnis
- Center for Translational Pain Medicine, Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Xin Luo
- Center for Translational Pain Medicine, Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Qianru He
- Center for Translational Pain Medicine, Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Yize Li
- Center for Translational Pain Medicine, Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Zilong Wang
- Center for Translational Pain Medicine, Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Xiang Ao
- Faculty of Dental Medicine and Oral Health Sciences, Department of Anesthesia, Faculty of Medicine and Health Science, Alan Edwards Centre for Research on Pain, McGill University, Montreal, Canada
| | - Marc Parisien
- Faculty of Dental Medicine and Oral Health Sciences, Department of Anesthesia, Faculty of Medicine and Health Science, Alan Edwards Centre for Research on Pain, McGill University, Montreal, Canada
| | - Lorenna Oliveira Fernandes de Araujo
- Faculty of Dental Medicine and Oral Health Sciences, Department of Anesthesia, Faculty of Medicine and Health Science, Alan Edwards Centre for Research on Pain, McGill University, Montreal, Canada
| | - Sahel Jahangiri Esfahani
- Faculty of Dental Medicine and Oral Health Sciences, Department of Anesthesia, Faculty of Medicine and Health Science, Alan Edwards Centre for Research on Pain, McGill University, Montreal, Canada
| | - Qin Zhang
- Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina, USA
| | - Raquel Tonello
- Pain Research Center, Department of Anesthesiology, University of Cincinnati Medical Center, Cincinnati, Ohio, USA
| | - Temugin Berta
- Pain Research Center, Department of Anesthesiology, University of Cincinnati Medical Center, Cincinnati, Ohio, USA
| | - Luda Diatchenko
- Faculty of Dental Medicine and Oral Health Sciences, Department of Anesthesia, Faculty of Medicine and Health Science, Alan Edwards Centre for Research on Pain, McGill University, Montreal, Canada
| | - Ru-Rong Ji
- Center for Translational Pain Medicine, Department of Anesthesiology, Duke University Medical Center, Durham, North Carolina, USA
- Department of Neurobiology and
- Department of Cell Biology, Duke University Medical Center, Durham, North Carolina, USA
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11
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Bang S, Jiang C, Xu J, Chandra S, McGinnis A, Luo X, He Q, Li Y, Wang Z, Ao X, Parisien M, Fernandes de Araujo LO, Esfahan SJ, Zhang Q, Tonello R, Berta T, Diatchenko L, Ji RR. Satellite glial GPR37L1 regulates maresin and potassium channel signaling for pain control. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.12.03.569787. [PMID: 38106084 PMCID: PMC10723316 DOI: 10.1101/2023.12.03.569787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
G protein coupled receptor 37-like 1 (GPR37L1) is an orphan GPCR and its function remains largely unknown. Here we report that GPR37L1 transcript is highly expressed compared to all known GPCRs in mouse and human dorsal root ganglia (DRGs) and selectively expressed in satellite glial cells (SGCs). Peripheral neuropathy following diabetes and chemotherapy by streptozotocin and paclitaxel resulted in downregulations of surface GPR37L1 in mouse and human DRGs. Transgenic mice with Gpr37l1 deficiency exhibited impaired resolution of neuropathic pain symptom (mechanical allodynia), whereas overexpression of Gpr37l1 in mouse DRGs can reverse neuropathic pain. Notably, GPR37L1 is co-expressed and coupled with potassium channels in SGCs. We found striking species differences in potassium channel expression in SGCs, with predominant expression of KCNJ10 and KCNJ3 in mouse and human SGCs, respectively. GPR37L1 regulates the surface expression and function of KCNJ10 and KCNJ3. We identified the pro-resolving lipid mediator maresin 1 (MaR1) as a GPR37L1 ligand. MaR1 increases KCNJ10/KCNJ3-mediated potassium influx in SGCs via GPR37L1. MaR1 protected chemotherapy-induced suppression of KCNJ13/KCNJ10 expression and function in SGCs. Finally, genetic analysis revealed that the GPR37L1-E296K variant is associated with increased chronic pain risk by destabilizing the protein. Thus, GPR37L1 in SGCs offers a new target for neuropathy protection and pain control.
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12
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Mecklenburg J, Shein SA, Malmir M, Hovhannisyan AH, Weldon K, Zou Y, Lai Z, Jin YF, Ruparel S, Tumanov AV, Akopian AN. Transcriptional profiles of non-neuronal and immune cells in mouse trigeminal ganglia. FRONTIERS IN PAIN RESEARCH 2023; 4:1274811. [PMID: 38028432 PMCID: PMC10644122 DOI: 10.3389/fpain.2023.1274811] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 09/29/2023] [Indexed: 12/01/2023] Open
Abstract
Non-neuronal cells constitute 90%-95% of sensory ganglia. These cells, especially glial and immune cells, play critical roles in the modulation of sensory neurons. This study aimed to identify, profile, and summarize the types of trigeminal ganglion (TG) non-neuronal cells in naïve male mice using published and our own data generated by single-cell RNA sequencing, flow cytometry, and immunohistochemistry. TG has five types of non-neuronal cells, namely, glial, fibroblasts, smooth muscle, endothelial, and immune cells. There is an agreement among publications for glial, fibroblasts, smooth muscle, and endothelial cells. Based on gene profiles, glial cells were classified as myelinated and non-myelinated Schwann cells and satellite glial cells. Mpz has dominant expression in Schwann cells, and Fabp7 is specific for SCG. Two types of Col1a2+ fibroblasts located throughout TG were distinguished. TG smooth muscle and endothelial cells in the blood vessels were detected using well-defined markers. Our study reported three types of macrophages (Mph) and four types of neutrophils (Neu) in TG. Mph were located in the neuronal bodies and nerve fibers and were sub-grouped by unique transcriptomic profiles with Ccr2, Cx3cr1, and Iba1 as markers. A comparison of databases showed that type 1 Mph is similar to choroid plexus-low (CPlo) border-associated Mph (BAMs). Type 2 Mph has the highest prediction score with CPhi BAMs, while type 3 Mph is distinct. S100a8+ Neu were located in the dura surrounding TG and were sub-grouped by clustering and expressions of Csf3r, Ly6G, Ngp, Elane, and Mpo. Integrative analysis of published datasets indicated that Neu-1, Neu-2, and Neu-3 are similar to the brain Neu-1 group, while Neu-4 has a resemblance to the monocyte-derived cells. Overall, the generated and summarized datasets on non-neuronal TG cells showed a unique composition of myeloid cell types in TG and could provide essential and fundamental information for studies on cell plasticity, interactomic networks between neurons and non-neuronal cells, and function during a variety of pain conditions in the head and neck regions.
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Affiliation(s)
- Jennifer Mecklenburg
- Department of Endodontics, School of Dentistry, The University of Texas Health Science Center at San Antonio (UTHSCSA), San Antonio, TX, United States
| | - Sergey A. Shein
- Microbiology, Immunology & Molecular Genetics Departments, School of Medicine, UTHSCSA, San Antonio, TX, United States
| | - Mostafa Malmir
- Department of Electrical and Computer Engineering, the University of Texas at San Antonio, San Antonio, TX, United States
| | - Anahit H. Hovhannisyan
- Department of Endodontics, School of Dentistry, The University of Texas Health Science Center at San Antonio (UTHSCSA), San Antonio, TX, United States
| | - Korri Weldon
- Molecular Medicine, School of Medicine, UTHSCSA, San Antonio, TX, United States
| | - Yi Zou
- Molecular Medicine, School of Medicine, UTHSCSA, San Antonio, TX, United States
| | - Zhao Lai
- Molecular Medicine, School of Medicine, UTHSCSA, San Antonio, TX, United States
- Greehey Children’s Cancer Research Institute, UTHSCSA, San Antonio, TX, United States
| | - Yu-Fang Jin
- Department of Electrical and Computer Engineering, the University of Texas at San Antonio, San Antonio, TX, United States
| | - Shivani Ruparel
- Department of Endodontics, School of Dentistry, The University of Texas Health Science Center at San Antonio (UTHSCSA), San Antonio, TX, United States
| | - Alexei V. Tumanov
- Microbiology, Immunology & Molecular Genetics Departments, School of Medicine, UTHSCSA, San Antonio, TX, United States
| | - Armen N. Akopian
- Department of Endodontics, School of Dentistry, The University of Texas Health Science Center at San Antonio (UTHSCSA), San Antonio, TX, United States
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13
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Chen O, Luo X, Ji RR. Macrophages and microglia in inflammation and neuroinflammation underlying different pain states. MEDICAL REVIEW (2021) 2023; 3:381-407. [PMID: 38283253 PMCID: PMC10811354 DOI: 10.1515/mr-2023-0034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 09/26/2023] [Indexed: 01/30/2024]
Abstract
Pain is a main symptom in inflammation, and inflammation induces pain via inflammatory mediators acting on nociceptive neurons. Macrophages and microglia are distinct cell types, representing immune cells and glial cells, respectively, but they share similar roles in pain regulation. Macrophages are key regulators of inflammation and pain. Macrophage polarization plays different roles in inducing and resolving pain. Notably, macrophage polarization and phagocytosis can be induced by specialized pro-resolution mediators (SPMs). SPMs also potently inhibit inflammatory and neuropathic pain via immunomodulation and neuromodulation. In this review, we discuss macrophage signaling involved in pain induction and resolution, as well as in maintaining physiological pain. Microglia are macrophage-like cells in the central nervous system (CNS) and drive neuroinflammation and pathological pain in various inflammatory and neurological disorders. Microglia-produced inflammatory cytokines can potently regulate excitatory and inhibitory synaptic transmission as neuromodulators. We also highlight sex differences in macrophage and microglial signaling in inflammatory and neuropathic pain. Thus, targeting macrophage and microglial signaling in distinct locations via pharmacological approaches, including immunotherapies, and non-pharmacological approaches will help to control chronic inflammation and chronic pain.
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Affiliation(s)
- Ouyang Chen
- Department of Anesthesiology, Center for Translational Pain Medicine, Duke University Medical Center, Durham, NC, USA
- Department of Cell Biology, Duke University Medical Center, Durham, NC, USA
| | - Xin Luo
- Department of Anesthesiology, Center for Translational Pain Medicine, Duke University Medical Center, Durham, NC, USA
- Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Ru-Rong Ji
- Department of Anesthesiology, Center for Translational Pain Medicine, Duke University Medical Center, Durham, NC, USA
- Department of Cell Biology, Duke University Medical Center, Durham, NC, USA
- Department of Neurobiology, Duke University Medical Center, Durham, NC, USA
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