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Hullugundi SK, Dolkas J, Chernov AV, Yaksh TL, Eddinger KA, Angert M, Catroli GF, Strongin AY, Dougherty PM, Li Y, Quehenberger O, Armando A, Shubayev VI. Cholesterol-dependent LXR transcription factor activity represses pronociceptive effects of estrogen in sensory neurons and pain induced by myelin basic protein fragments. Brain Behav Immun Health 2024; 38:100757. [PMID: 38590761 PMCID: PMC10999831 DOI: 10.1016/j.bbih.2024.100757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Accepted: 03/17/2024] [Indexed: 04/10/2024] Open
Abstract
Background A bioactive myelin basic protein (MBP) fragment, comprising MBP84-104, is released in sciatic nerve after chronic constriction injury (CCI). Intraneural injection (IN) of MBP84-104 in an intact sciatic nerve is sufficient to induce persistent neuropathic pain-like behavior via robust transcriptional remodeling at the injection site and ipsilateral dorsal root ganglia (DRG) and spinal cord. The sex (female)-specific pronociceptive activity of MBP84-104 associates with sex-specific changes in cholesterol metabolism and activation of estrogen receptor (ESR)1 signaling. Methods In male and female normal and post-CCI rat sciatic nerves, we assessed: (i) cholesterol precursor and metabolite levels by lipidomics; (ii) MBP84-104 interactors by mass spectrometry of MBP84-104 pull-down; and (iii) liver X receptor (LXR)α protein expression by immunoblotting. To test the effect of LXRα stimulation on IN MBP84-104-induced mechanical hypersensitivity, the LXRα expression was confirmed along the segmental neuraxis, in DRG and spinal cord, followed by von Frey testing of the effect of intrathecally administered synthetic LXR agonist, GW3965. In cultured male and female rat DRGs exposed to MBP84-104 and/or estrogen treatments, transcriptional effect of LXR stimulation by GW3965 was assessed on downstream cholesterol transporter Abc, interleukin (IL)-6, and pronociceptive Cacna2d1 gene expression. Results CCI regulated LXRα ligand and receptor levels in nerves of both sexes, with cholesterol precursors, desmosterol and 7-DHC, and oxysterol elevated in females relative to males. MBP84-104 interacted with nuclear receptor coactivator (Ncoa)1, known to activate LXRα, injury-specific in nerves of both sexes. LXR stimulation suppressed ESR1-induced IL-6 and Cacna2d1 expression in cultured DRGs of both sexes and attenuated MBP84-104-induced pain in females. Conclusion The injury-released bioactive MBP fragments induce pronociceptive changes by selective inactivation of nuclear transcription factors, including LXRα. By Ncoa1 sequestration, bioactive MBP fragments render LXRα function to counteract pronociceptive activity of estrogen/ESR1 in sensory neurons. This effect of MBP fragments is prevalent in females due to high circulating estrogen levels in females relative to males. Restoring LXR activity presents a promising therapeutic strategy in management of neuropathic pain induced by bioactive MBP.
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Affiliation(s)
- Swathi K. Hullugundi
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA
- VA San Diego Healthcare System, La Jolla, CA, USA
| | - Jennifer Dolkas
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA
- VA San Diego Healthcare System, La Jolla, CA, USA
| | - Andrei V. Chernov
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA
- VA San Diego Healthcare System, La Jolla, CA, USA
| | - Tony L. Yaksh
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA
| | - Kelly A. Eddinger
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA
| | - Mila Angert
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA
- VA San Diego Healthcare System, La Jolla, CA, USA
| | - Glaucilene Ferreira Catroli
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA
- VA San Diego Healthcare System, La Jolla, CA, USA
| | - Alex Y. Strongin
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Patrick M. Dougherty
- Department of Pain Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Yan Li
- Department of Pain Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | | | - Aaron Armando
- Lipidomics Core, University of California, San Diego, La Jolla, CA, USA
| | - Veronica I. Shubayev
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA
- VA San Diego Healthcare System, La Jolla, CA, USA
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Moreau N, Peirs C, Dallel R, Boucher Y. [Specificities of orofacial neuropathic pain]. Med Sci (Paris) 2024; 40:64-71. [PMID: 38299905 DOI: 10.1051/medsci/2023197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024] Open
Abstract
Head pain and notably orofacial pain differs from spinal pain on pathophysiological, clinical, therapeutic and prognostic levels. Its high prevalence, important impact on quality of life and significant socio-economical burden justify specific study of such type of pain. Among them, neuropathic orofacial pain resulting from disease or trauma of the trigeminal nervous system is among the most difficult types of pain to diagnose and to treat. Deciphering of underlying peripheral and central mechanisms has allowed numerous conceptual, clinical and therapeutic advances, notably the role of neural and non neural cell types, such as glia, immunocytes, vascular endothelial cells or the role of trigeminal sensory complex neural circuitry reconfiguration in the development of post-traumatic trigeminal neuropathic pain. Cellular interactions within the trigeminal ganglion, allowing a better understanding of several painful dental, ocular or cephalalgic comorbidities, are also described.
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Affiliation(s)
- Nathan Moreau
- Laboratoire de neurobiologie orofaciale, EA 7543, Université Paris Cité, Paris, France - Hôpital Bretonneau, Service de médecine bucco-dentaire, AP-HP, Paris, France
| | - Cédric Peirs
- Université Clermont Auvergne, CHU Clermont-Ferrand, Inserm, Neuro-Dol, Clermont-Ferrand, France
| | - Radhouane Dallel
- Université Clermont Auvergne, CHU Clermont-Ferrand, Inserm, Neuro-Dol, Clermont-Ferrand, France
| | - Yves Boucher
- Laboratoire de neurobiologie orofaciale, EA 7543, Université Paris Cité, Paris, France - Hôpital Pitié-Salpêtrière, Service de médecine bucco-dentaire, AP-HP, Paris, France
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Wang J, Yin C, Pan Y, Yang Y, Li W, Ni H, Liu B, Nie H, Xu R, Wei H, Zhang Y, Li Y, Hu Q, Tai Y, Shao X, Fang J, Liu B. CXCL13 contributes to chronic pain of a mouse model of CRPS-I via CXCR5-mediated NF-κB activation and pro-inflammatory cytokine production in spinal cord dorsal horn. J Neuroinflammation 2023; 20:109. [PMID: 37158939 PMCID: PMC10165831 DOI: 10.1186/s12974-023-02778-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 04/12/2023] [Indexed: 05/10/2023] Open
Abstract
BACKGROUND Complex regional pain syndrome type-I (CRPS-I) causes excruciating pain that affect patients' life quality. However, the mechanisms underlying CRPS-I are incompletely understood, which hampers the development of target specific therapeutics. METHODS The mouse chronic post-ischemic pain (CPIP) model was established to mimic CRPS-I. qPCR, Western blot, immunostaining, behavioral assay and pharmacological methods were used to study mechanisms underlying neuroinflammation and chronic pain in spinal cord dorsal horn (SCDH) of CPIP mice. RESULTS CPIP mice developed robust and long-lasting mechanical allodynia in bilateral hindpaws. The expression of inflammatory chemokine CXCL13 and its receptor CXCR5 was significantly upregulated in ipsilateral SCDH of CPIP mice. Immunostaining revealed CXCL13 and CXCR5 was predominantly expressed in spinal neurons. Neutralization of spinal CXCL13 or genetic deletion of Cxcr5 (Cxcr5-/-) significantly reduced mechanical allodynia, as well as spinal glial cell overactivation and c-Fos activation in SCDH of CPIP mice. Mechanical pain causes affective disorder in CPIP mice, which was attenuated in Cxcr5-/- mice. Phosphorylated STAT3 co-expressed with CXCL13 in SCDH neurons and contributed to CXCL13 upregulation and mechanical allodynia in CPIP mice. CXCR5 coupled with NF-κB signaling in SCDH neurons to trigger pro-inflammatory cytokine gene Il6 upregulation, contributing to mechanical allodynia. Intrathecal CXCL13 injection produced mechanical allodynia via CXCR5-dependent NF-κB activation. Specific overexpression of CXCL13 in SCDH neurons is sufficient to induce persistent mechanical allodynia in naïve mice. CONCLUSIONS These results demonstrated a previously unidentified role of CXCL13/CXCR5 signaling in mediating spinal neuroinflammation and mechanical pain in an animal model of CRPS-I. Our work suggests that targeting CXCL13/CXCR5 pathway may lead to novel therapeutic approaches for CRPS-I.
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Affiliation(s)
- Jie Wang
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, 310053, China
- Department of Rehabilitation in Traditional Chinese Medicine, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Chengyu Yin
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Yushuang Pan
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Yunqin Yang
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Wei Li
- NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain-Machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, China
| | - Huadong Ni
- Department of Anesthesiology and Pain Research Center, The First Affiliated Hospital of Jiaxing University, Jiaxing, China
| | - Boyu Liu
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Huimin Nie
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Ruoyao Xu
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Huina Wei
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Yunwen Zhang
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Yuanyuan Li
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Qimiao Hu
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Yan Tai
- Academy of Chinese Medical Sciences, Zhejiang Chinese Medical University, Hangzhou, China
| | - Xiaomei Shao
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Jianqiao Fang
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, 310053, China.
| | - Boyi Liu
- Department of Neurobiology and Acupuncture Research, Key Laboratory of Acupuncture and Neurology of Zhejiang Province, The Third Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, 310053, China.
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Shubayev VI, Dolkas J, Catroli GF, Chernov AV. A human coronavirus OC43-derived polypeptide causes neuropathic pain. EMBO Rep 2022; 23:e54069. [PMID: 35466531 PMCID: PMC9115284 DOI: 10.15252/embr.202154069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 03/29/2022] [Accepted: 04/03/2022] [Indexed: 11/22/2022] Open
Abstract
Human coronaviruses have been recently implicated in neurological sequelae by insufficiently understood mechanisms. We here identify an amino acid sequence within the HCoV-OC43 p65-like protein homologous to the evolutionarily conserved motif of myelin basic protein (MBP). Because MBP-derived peptide exposure in the sciatic nerve produces pronociceptive activity in female rodents, we examined whether a synthetic peptide derived from the homologous region of HCoV-OC43 (OC43p) acts by molecular mimicry to promote neuropathic pain. OC43p, but not scrambled peptides, induces mechanical hypersensitivity in rats following intrasciatic injections. Transcriptome analyses of the corresponding spinal cords reveal upregulation of genes and signaling pathways with known nociception-, immune-, and cellular energy-related activities. Affinity capture shows the association of OC43p with an Na+ /K+ -transporting ATPase, providing a potential direct target and mechanistic insight into virus-induced effects on energy homeostasis and the sensory neuraxis. We propose that HCoV-OC43 polypeptides released during infection dysregulate normal nervous system functions through molecular mimicry of MBP, leading to mechanical hypersensitivity. Our findings might provide a new paradigm for virus-induced neuropathic pain.
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Affiliation(s)
- Veronica I Shubayev
- Department of AnesthesiologyUniversity of California San DiegoLa JollaCAUSA
- VA San Diego Healthcare SystemLa JollaCAUSA
| | - Jennifer Dolkas
- Department of AnesthesiologyUniversity of California San DiegoLa JollaCAUSA
- VA San Diego Healthcare SystemLa JollaCAUSA
| | - Glaucilene Ferreira Catroli
- Department of AnesthesiologyUniversity of California San DiegoLa JollaCAUSA
- VA San Diego Healthcare SystemLa JollaCAUSA
| | - Andrei V Chernov
- Department of AnesthesiologyUniversity of California San DiegoLa JollaCAUSA
- VA San Diego Healthcare SystemLa JollaCAUSA
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5
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Lee HJ, Remacle AG, Hullugundi SK, Dolkas J, Leung JB, Chernov AV, Yaksh TL, Strongin AY, Shubayev VI. Sex-Specific B Cell and Anti-Myelin Autoantibody Response After Peripheral Nerve Injury. Front Cell Neurosci 2022; 16:835800. [PMID: 35496906 PMCID: PMC9050049 DOI: 10.3389/fncel.2022.835800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 01/25/2022] [Indexed: 11/18/2022] Open
Abstract
Immunotherapy holds promise as a non-addictive treatment of refractory chronic pain states. Increasingly, sex is recognized to impact immune regulation of pain states, including mechanical allodynia (pain from non-painful stimulation) that follows peripheral nerve trauma. This study aims to assess the role of B cells in sex-specific responses to peripheral nerve trauma. Using a rat model of sciatic nerve chronic constriction injury (CCI), we analyzed sex differences in (i) the release of the immunodominant neural epitopes of myelin basic protein (MBP); (ii) the levels of serum immunoglobulin M (IgM)/immunoglobulin G (IgG) autoantibodies against the MBP epitopes; (iii) endoneurial B cell/CD20 levels; and (iv) mechanical sensitivity behavior after B cell/CD20 targeting with intravenous (IV) Rituximab (RTX) and control, IV immunoglobulin (IVIG), therapy. The persistent MBP epitope release in CCI nerves of both sexes was accompanied by the serum anti-MBP IgM autoantibody in female CCI rats alone. IV RTX therapy during CD20-reactive cell infiltration of nerves of both sexes reduced mechanical allodynia in females but not in males. IVIG and vehicle treatments had no effect in either sex. These findings provide strong evidence for sexual dimorphism in B-cell function after peripheral nervous system (PNS) trauma and autoimmune pathogenesis of neuropathic pain, potentially amenable to immunotherapeutic intervention, particularly in females. A myelin-targeted serum autoantibody may serve as a biomarker of such painful states. This insight into the biological basis of sex-specific response to neuraxial injury will help personalize regenerative and analgesic therapies.
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Affiliation(s)
- Hee Jong Lee
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, United States
- VA San Diego Healthcare System, La Jolla, CA, United States
- Department of Anesthesiology & Pain Medicine, Hanyang University, Seoul, South Korea
| | - Albert G. Remacle
- Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, United States
| | - Swathi K. Hullugundi
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, United States
- VA San Diego Healthcare System, La Jolla, CA, United States
| | - Jennifer Dolkas
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, United States
- VA San Diego Healthcare System, La Jolla, CA, United States
| | - Jake B. Leung
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, United States
| | - Andrei V. Chernov
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, United States
| | - Tony L. Yaksh
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, United States
| | - Alex Y. Strongin
- Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, United States
| | - Veronica I. Shubayev
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, United States
- VA San Diego Healthcare System, La Jolla, CA, United States
- *Correspondence: Veronica I. Shubayev,
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6
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Chernov AV, Shubayev VI. Sexual Dimorphism of Early Transcriptional Reprogramming in Dorsal Root Ganglia After Peripheral Nerve Injury. Front Mol Neurosci 2021; 14:779024. [PMID: 34966260 PMCID: PMC8710713 DOI: 10.3389/fnmol.2021.779024] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 11/19/2021] [Indexed: 01/18/2023] Open
Abstract
Peripheral nerve injury induces genome-wide transcriptional reprogramming of first-order neurons and auxiliary cells of dorsal root ganglia (DRG). Accumulating experimental evidence suggests that onset and mechanistic principles of post-nerve injury processes are sexually dimorphic. We examined largely understudied aspects of early transcriptional events in DRG within 24 h after sciatic nerve axotomy in mice of both sexes. Using high-depth RNA sequencing (>50 million reads/sample) to pinpoint sexually dimorphic changes related to regeneration, immune response, bioenergy, and sensory functions, we identified a higher number of transcriptional changes in male relative to female DRG. In males, the decline in ion channel transcripts was accompanied by the induction of innate immune cascades via TLR, chemokine, and Csf1-receptor axis and robust regenerative programs driven by Sox, Twist1/2, and Pax5/9 transcription factors. Females demonstrated nerve injury-specific transcriptional co-activation of the actinin 2 network. The predicted upstream regulators and interactive networks highlighted the role of novel epigenetic factors and genetic linkage to sex chromosomes as hallmarks of gene regulation post-axotomy. We implicated epigenetic X chromosome inactivation in the regulation of immune response activity uniquely in females. Sexually dimorphic regulation of MMP/ADAMTS metalloproteinases and their intrinsic X-linked regulator Timp1 contributes to extracellular matrix remodeling integrated with pro-regenerative and immune functions. Lexis1 non-coding RNA involved in LXR-mediated lipid metabolism was identified as a novel nerve injury marker. Together, our data identified unique early response triggers of sex-specific peripheral nerve injury regulation to gain mechanistic insights into the origin of female- and male-prevalent sensory neuropathies.
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Affiliation(s)
- Andrei V Chernov
- Department of Anesthesiology, University of California, San Diego, San Diego, CA, United States.,VA San Diego Healthcare System, San Diego, CA, United States
| | - Veronica I Shubayev
- Department of Anesthesiology, University of California, San Diego, San Diego, CA, United States.,VA San Diego Healthcare System, San Diego, CA, United States
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7
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Khodabakhsh P, Pournajaf S, Mohaghegh Shalmani L, Ahmadiani A, Dargahi L. Insulin Promotes Schwann-Like Cell Differentiation of Rat Epidermal Neural Crest Stem Cells. Mol Neurobiol 2021; 58:5327-5337. [PMID: 34297315 DOI: 10.1007/s12035-021-02423-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 05/05/2021] [Indexed: 10/20/2022]
Abstract
Schwann cells (SCs) are considered potentially attractive candidates for transplantation therapies in neurodegenerative diseases. However, problems arising from the isolation and expansion of the SCs restrict their clinical applications. Establishing an alternative Schwann-like cell type is a prerequisite. Epidermal neural crest stem cells (EPI-NCSCs) are well studied for their autologous accessibility, along with the ability to produce major neural crest derivatives and neurotrophic factors. In the current study, we explored insulin influence, a well-known growth factor, on directing EPI-NCSCs into the Schwann cell (SC) lineage. EPI-NCSCs were isolated from rat hair bulge explants. The viability of cells treated with a range of insulin concentrations (0.05-100 μg/ml) was defined by MTT assay at 24, 48, and 72 h. The gene expression profiles of neurotrophic factors (BDNF, FGF-2, and IL-6), key regulators involved in the development of SC (EGR-1, SOX-10, c-JUN, GFAP, OCT-6, EGR-2, and MBP), and oligodendrocyte (PDGFR-α and NG-2) were quantified 1 and 9 days post-treatment with 0.05 and 5 μg/ml insulin. Furthermore, the protein expression of nestin (stemness marker), SOX-10, PDGFR-α, and MBP was analyzed following the long-term insulin treatment. Insulin downregulated the early-stage SC differentiation marker (EGR-1) and increased neurotrophins (BDNF and IL-6) and pro-myelinating genes, including OCT-6, SOX-10, EGR-2, and MBP, as well as oligodendrocyte differentiation markers, upon exposure for 9 days. Insulin can promote EPI-NCSC differentiation toward SC lineage and possibly oligodendrocytes. Thus, employing insulin might enhance the EPI-NCSCs efficiency in cell transplantation strategies.
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Affiliation(s)
- Pariya Khodabakhsh
- Department of Pharmacology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Safura Pournajaf
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Leila Mohaghegh Shalmani
- Pharmacology and Toxicology Department, Faculty of Pharmacy and Pharmaceutical Sciences, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Abolhassan Ahmadiani
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Leila Dargahi
- Neurobiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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8
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He Q, Chen B, Chen S, Zhang M, Duan L, Feng X, Chen J, Zhou L, Chen L, Duan Y. MBP-activated autoimmunity plays a role in arsenic-induced peripheral neuropathy and the potential protective effect of mecobalamin. Environ Toxicol 2021; 36:1243-1253. [PMID: 33739591 DOI: 10.1002/tox.23122] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 03/04/2021] [Indexed: 06/12/2023]
Abstract
Intake excessive arsenic (As) is related to the occurrence of peripheral neuropathy. However, both the underlying mechanism and the preventive approach remain largely unknown. In the present study, As treatment significantly decreased the mechanical withdrawal threshold and increased the titer of anti-myelin basic protein antibody in rats, accompanied with damaged BNB. The levels of inflammatory cytokines and proteolytic enzymes were also significantly upregulated. However, administration of MeCbl in As-treated rats significantly reversed the decline in hindfoot mechanical withdrawal threshold, as well as BNB failure and sciatic nerve inflammation. Repeated As treatment in athymic nude mice indicated that sciatic nerve inflammation and mechanical hyperalgesia were T cell-dependent. These data implicated that MBP-activated autoimmunity and the related neuroinflammation probably contributed to As-induced mechanical hyperalgesia and MeCbl exerted a protective role probably via maintenance the integrity of BNB and inhibition of neuroinflammation.
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Affiliation(s)
- Qican He
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, China
| | - Bingzhi Chen
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, China
| | - Shaoyi Chen
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, China
| | - Muyang Zhang
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, China
| | - Lidan Duan
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, China
| | - Xiangling Feng
- Experimental Center for Preventive Medicine, Xiangya School of Public Health, Central South University, Changsha, China
| | - Jihua Chen
- Department of Nutrition and Food Hygiene, Xiangya School of Public Health, Central South University, Changsha, China
| | - Lezhou Zhou
- Central Laboratory, Occupational Disease Prevention and Control Hospital of Hunan Province, Changsha, China
| | - Lv Chen
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, China
| | - Yanying Duan
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, China
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Kummer KK, Zeidler M, Kalpachidou T, Kress M. Role of IL-6 in the regulation of neuronal development, survival and function. Cytokine 2021; 144:155582. [PMID: 34058569 DOI: 10.1016/j.cyto.2021.155582] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 05/07/2021] [Accepted: 05/11/2021] [Indexed: 12/17/2022]
Abstract
The pleiotropic cytokine interleukin-6 (IL-6) is emerging as a molecule with both beneficial and destructive potentials. It can exert opposing actions triggering either neuron survival after injury or causing neurodegeneration and cell death in neurodegenerative or neuropathic disorders. Importantly, neurons respond differently to IL-6 and this critically depends on their environment and whether they are located in the peripheral or the central nervous system. In addition to its hub regulator role in inflammation, IL-6 is recently emerging as an important regulator of neuron function in health and disease, offering exciting possibilities for more mechanistic insight into the pathogenesis of mental, neurodegenerative and pain disorders and for developing novel therapies for diseases with neuroimmune and neurogenic pathogenic components.
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Affiliation(s)
- Kai K Kummer
- Institute of Physiology, Medical University of Innsbruck, Austria
| | | | | | - Michaela Kress
- Institute of Physiology, Medical University of Innsbruck, Austria.
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Chernov AV, Hullugundi SK, Eddinger KA, Dolkas J, Remacle AG, Angert M, James BP, Yaksh TL, Strongin AY, Shubayev VI. A myelin basic protein fragment induces sexually dimorphic transcriptome signatures of neuropathic pain in mice. J Biol Chem 2020; 295:10807-10821. [PMID: 32532796 DOI: 10.1074/jbc.ra120.013696] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 06/11/2020] [Indexed: 02/06/2023] Open
Abstract
In the peripheral nerve, mechanosensitive axons are insulated by myelin, a multilamellar membrane formed by Schwann cells. Here, we offer first evidence that a myelin degradation product induces mechanical hypersensitivity and global transcriptomics changes in a sex-specific manner. Focusing on downstream signaling events of the functionally active 84-104 myelin basic protein (MBP(84-104)) fragment released after nerve injury, we demonstrate that exposing the sciatic nerve to MBP(84-104) via endoneurial injection produces robust mechanical hypersensitivity in female, but not in male, mice. RNA-seq and systems biology analysis revealed a striking sexual dimorphism in molecular signatures of the dorsal root ganglia (DRG) and spinal cord response, not observed at the nerve injection site. Mechanistically, intra-sciatic MBP(84-104) induced phospholipase C (PLC)-driven (females) and phosphoinositide 3-kinase-driven (males) phospholipid metabolism (tier 1). PLC/inositol trisphosphate receptor (IP3R) and estrogen receptor co-regulation in spinal cord yielded Ca2+-dependent nociceptive signaling induction in females that was suppressed in males (tier 2). IP3R inactivation by intrathecal xestospongin C attenuated the female-specific hypersensitivity induced by MBP(84-104). According to sustained sensitization in tiers 1 and 2, T cell-related signaling spreads to the DRG and spinal cord in females, but remains localized to the sciatic nerve in males (tier 3). These results are consistent with our previous finding that MBP(84-104)-induced pain is T cell-dependent. In summary, an autoantigenic peptide endogenously released in nerve injury triggers multisite, sex-specific transcriptome changes, leading to neuropathic pain only in female mice. MBP(84-104) acts through sustained co-activation of metabolic, estrogen receptor-mediated nociceptive, and autoimmune signaling programs.
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Affiliation(s)
- Andrei V Chernov
- Department of Anesthesiology, University of California, San Diego, La Jolla, California, USA .,Infectious & Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Swathi K Hullugundi
- Department of Anesthesiology, University of California, San Diego, La Jolla, California, USA.,Veterans Affairs San Diego Healthcare System, La Jolla, California, USA
| | - Kelly A Eddinger
- Department of Anesthesiology, University of California, San Diego, La Jolla, California, USA
| | - Jennifer Dolkas
- Department of Anesthesiology, University of California, San Diego, La Jolla, California, USA.,Veterans Affairs San Diego Healthcare System, La Jolla, California, USA
| | - Albert G Remacle
- Infectious & Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Mila Angert
- Department of Anesthesiology, University of California, San Diego, La Jolla, California, USA.,Veterans Affairs San Diego Healthcare System, La Jolla, California, USA
| | - Brian P James
- Infectious & Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Tony L Yaksh
- Department of Anesthesiology, University of California, San Diego, La Jolla, California, USA
| | - Alex Y Strongin
- Infectious & Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Veronica I Shubayev
- Department of Anesthesiology, University of California, San Diego, La Jolla, California, USA .,Veterans Affairs San Diego Healthcare System, La Jolla, California, USA
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11
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Abstract
Injuries typically result in the development of neuropathic pain, which decreases in parallel with wound healing. However, the pain may remain after the injury appears to have healed, which is generally associated with an ongoing underlying pro-inflammatory state. Injury induces many cells to release factors that contribute to the development of a pro-inflammatory state, which is considered an essential first step towards wound healing. However, pain elimination requires a transition of the injury site from pro- to anti-inflammatory. Therefore, developing techniques that eliminate chronic pain require an understanding of the cells resident at and recruited to injury sites, the factors they release, that promote a pro-inflammatory state, and promote the subsequent transition of that site to be anti-inflammatory. Although a relatively large number of cells, factors, and gene expression changes are involved in these processes, it may be possible to control a relatively small number of them leading to the reduction and elimination of chronic neuropathic pain. This first of two papers examines the roles of the most salient cells and mediators associated with the development and maintenance of chronic neuropathic pain. The following paper examines the cells and mediators involved in reducing and eliminating chronic neuropathic pain.
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Affiliation(s)
- Damien P Kuffler
- Institute of Neurobiology, Medical Sciences Campus, University of Puerto Rico, 201 Blvd. del Valle, San Juan, PR, 00901, USA.
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12
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Kozlowski M, Nazimek K, Nowak B, Filipczak-Bryniarska I, Bryniarski K. Analgesic adjuvants modulate morphine-induced immune effects in mice. Pharmacol Rep 2019; 71:573-582. [PMID: 31170658 DOI: 10.1016/j.pharep.2019.04.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 04/02/2019] [Accepted: 04/18/2019] [Indexed: 10/27/2022]
Abstract
BACKGROUND Macrophages, involved in the pathogenesis of pain, express a variety of receptors enabling responsiveness to certain medications, including adjuvant analgesics (AAs), that are effective in neuropathic pain and include drugs not primarily indicated for pain treatment, such as anticonvulsants or antidepressants. Their analgesic effects are likely associated with immunomodulatory activity, that remain undefined. Thus, current research aimed at examining the impact of AAs on morphine-induced effects exerted on mouse immunity. METHODS Macrophages from mice treated with morphine with or without gabapentin, amitriptyline or venlafaxine, were either subjected to phagocytosis assay, cultured to evaluate the generation of cytokines, or were pulsed with either corpuscular antigen or hapten and transferred to naive recipients to induce humoral or cellular response, respectively. Active contact hypersensitivity was also elicited in drug-treated mice. RESULTS We observed that repeatedly administered morphine and AAs reduced antigen phagocytosis by macrophages. Further, amitriptyline with morphine enhanced basal secretion of cytokines by macrophages, and all drugs tended to decrease LPS-stimulated release of pro-inflammatory cytokines. Morphine and AAs impacted the expression of phagocytosis and antigen-presentation markers on macrophages, which led to the reduced ability of morphine-affected macrophages to induce B-cell secretion of specific antibodies, and the addition of AAs strengthened this effect. Finally, gabapentin and venlafaxine suppressed the contact hypersensitivity reaction, while amitriptyline seemed to have the opposite effect. CONCLUSIONS Our study demonstrated a significant anti-inflammatory activity of AAs across a broad spectrum of macrophage immune functions, which is likely critical to their analgesic activity supporting the beneficial effect of morphine.
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Affiliation(s)
- Michael Kozlowski
- Department of Immunology, Jagiellonian University Medical College, Kraków, Poland; Department of Pain Treatment and Palliative Care, Jagiellonian University Medical College, Kraków, Poland
| | - Katarzyna Nazimek
- Department of Immunology, Jagiellonian University Medical College, Kraków, Poland
| | - Bernadeta Nowak
- Department of Immunology, Jagiellonian University Medical College, Kraków, Poland
| | - Iwona Filipczak-Bryniarska
- Department of Pain Treatment and Palliative Care, Jagiellonian University Medical College, Kraków, Poland
| | - Krzysztof Bryniarski
- Department of Immunology, Jagiellonian University Medical College, Kraków, Poland.
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13
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Shubayev VI, Strongin AY, Yaksh TL. Structural homology of myelin basic protein and muscarinic acetylcholine receptor: Significance in the pathogenesis of complex regional pain syndrome. Mol Pain 2018; 14:1744806918815005. [PMID: 30392459 PMCID: PMC6287297 DOI: 10.1177/1744806918815005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Complex regional pain syndrome is an extremely painful condition that develops after trauma to a limb. Complex regional pain syndrome exhibits autoimmune features in part mediated by autoantibodies against muscarinic‐2 acetylcholine (M2) receptor. The mechanisms underlying the M2 receptor involvement in complex regional pain syndrome remain obscure. Based on our recent work demonstrating that limb nerve trauma releases a potent proalgesic, immunodominant myelin basic protein fragment, our present sequence database analyses reveal an unexpected and previously undescribed structural homology of the proalgesic myelin basic protein fragment with the M2 receptor. As both complex regional pain syndrome and the proalgesic myelin basic protein activity are prevalent in females, this myelin basic protein/M2 homology presents an inviting hypothesis explaining the mechanisms of autoimmune pathogenesis and sexual dimorphism that underlies vulnerability toward developing complex regional pain syndrome and other pain states with neuropathic features. This hypothesis may aid in the development of novel diagnostic and therapeutic strategies to chronic pain.
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Affiliation(s)
- Veronica I Shubayev
- 1 Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA.,2 VA San Diego Healthcare System, La Jolla, CA, USA
| | - Alex Y Strongin
- 3 Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Tony L Yaksh
- 1 Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA
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14
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Chernov AV, Remacle AG, Hullugundi SK, Cieplak P, Angert M, Dolkas J, Shubayev VI, Strongin AY. Amino acid sequence conservation of the algesic fragment of myelin basic protein is required for its interaction with CDK5 and function in pain. FEBS J 2018; 285:3485-3502. [PMID: 30079618 DOI: 10.1111/febs.14623] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 06/19/2018] [Accepted: 08/02/2018] [Indexed: 01/08/2023]
Abstract
Neurotrauma frequently results in neuropathic pain. Our earlier studies revealed that peripheral neurotrauma-induced fragmentation of the myelin basic protein (MBP), a major component of the myelin sheath formed by Schwann cells, initiates a pain response from light touch stimuli (mechanical allodynia) in rodents. Here, we identified the cyclin-dependent kinase 5 (CDK5), as an intracellular interactor of MBP in Schwann cells. The algesic peptide fragment of MBP directly associated with CDK5. When complexed with its p25 coactivator, CDK5 phosphorylated the conserved MBP sequence. The expressed MBP fragment colocalized with CDK5 in Schwann cell protrusions. Roscovitine, an ATP-competitive CDK5 inhibitor, disrupted localization of the expressed MBP peptide. Mutations in the evolutionary conserved MBP algesic sequence resulted in the interference with intracellular trafficking of the MBP fragment and kinase activity of CDK5 and diminished pain-like behavior in rodents. Our findings show that MBP fragment amino acid sequence conservation determines its interactions, trafficking, and pronociceptive activity. Because CDK5 activity controls both neurogenesis and nociception, the algesic MBP fragment may be involved in the regulation of the CDK5 functionality in pain signaling and postinjury neurogenesis in vertebrates. DATABASE The novel RNA-seq datasets were deposited in the GEO database under the accession number GSE107020.
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Affiliation(s)
- Andrei V Chernov
- Infectious & Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Albert G Remacle
- Infectious & Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Swathi K Hullugundi
- Department of Anesthesiology, VA San Diego Healthcare System, University of California, San Diego, La Jolla, CA, USA
| | - Piotr Cieplak
- Infectious & Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Mila Angert
- Department of Anesthesiology, VA San Diego Healthcare System, University of California, San Diego, La Jolla, CA, USA
| | - Jennifer Dolkas
- Department of Anesthesiology, VA San Diego Healthcare System, University of California, San Diego, La Jolla, CA, USA
| | - Veronica I Shubayev
- Department of Anesthesiology, VA San Diego Healthcare System, University of California, San Diego, La Jolla, CA, USA
| | - Alex Y Strongin
- Infectious & Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
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15
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Remacle AG, Hullugundi SK, Dolkas J, Angert M, Cieplak P, Scott D, Chernov AV, Shubayev VI, Strongin AY. Interaction of the cryptic fragment of myelin basic protein with mitochondrial voltage-dependent anion-selective channel-1 affects cell energy metabolism. Biochem J 2018; 475:2355-76. [PMID: 29954845 DOI: 10.1042/BCJ20180137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 06/20/2018] [Accepted: 06/28/2018] [Indexed: 12/16/2022]
Abstract
In demyelinating nervous system disorders, myelin basic protein (MBP), a major component of the myelin sheath, is proteolyzed and its fragments are released in the neural environment. Here, we demonstrated that, in contrast with MBP, the cellular uptake of the cryptic 84-104 epitope (MBP84-104) did not involve the low-density lipoprotein receptor-related protein-1, a scavenger receptor. Our pull-down assay, mass spectrometry and molecular modeling studies suggested that, similar with many other unfolded and aberrant proteins and peptides, the internalized MBP84-104 was capable of binding to the voltage-dependent anion-selective channel-1 (VDAC-1), a mitochondrial porin. Molecular modeling suggested that MBP84-104 directly binds to the N-terminal α-helix located midway inside the 19 β-blade barrel of VDAC-1. These interactions may have affected the mitochondrial functions and energy metabolism in multiple cell types. Notably, MBP84-104 caused neither cell apoptosis nor affected the total cellular ATP levels, but repressed the aerobic glycolysis (lactic acid fermentation) and decreased the l-lactate/d-glucose ratio (also termed as the Warburg effect) in normal and cancer cells. Overall, our findings implied that because of its interactions with VDAC-1, the cryptic MBP84-104 peptide invoked reprogramming of the cellular energy metabolism that favored enhanced cellular activity, rather than apoptotic cell death. We concluded that the released MBP84-104 peptide, internalized by the cells, contributes to the reprogramming of the energy-generating pathways in multiple cell types.
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16
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Zhou R, Xu T, Liu X, Chen Y, Kong D, Tian H, Yue M, Huang D, Zeng J. Activation of spinal dorsal horn P2Y 13 receptors can promote the expression of IL-1β and IL-6 in rats with diabetic neuropathic pain. J Pain Res 2018; 11:615-628. [PMID: 29628771 PMCID: PMC5877493 DOI: 10.2147/jpr.s154437] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Objective The dorsal horn P2Y13 receptor is involved in the development of pain behavior induced by peripheral nerve injury. It is unclear whether the expression of proinflammatory cytokines interleukin (IL)-1β and IL-6 at the spinal dorsal horn are influenced after the activation of P2Y13 receptor in rats with diabetic neuropathic pain (DNP). Methods A rat model of type 1 DNP was induced by intraperitoneal injection of streptozotocin (STZ). We examined the expression of P2Y13 receptor, Iba-1, IL-1β, IL-6, JAK2, STAT3, pTyr1336, and pTyr1472 NR2B in rat spinal dorsal horn. Results Compared with normal rats, STZ-diabetic rats displayed obvious mechanical allodynia and the increased expression of P2Y13 receptor, Iba-1, IL-1β, and IL-6 in the dorsal spinal cord that was continued for 6 weeks in DNP rats. The data obtained indicated that, in DNP rats, administration of MRS2211 significantly attenuated mechanical allodynia. Compared with DNP rats, after MRS2211 treatment, expression of the P2Y13 receptor, Iba-1, IL-1β, and IL-6 were reduced 4 weeks after the STZ injection. However, MRS2211 treatment did not attenuate the expression of the P2Y13 receptor, Iba-1, IL-1β, and IL-6 at 6 weeks after the STZ injection. MRS2211 suppressed JAK2 and STAT3 expression in the early stage, but not in the later stage. Moreover, pTyr1336 NR2B was significantly decreased, whereas pTyr1472 NR2B was unaffected in the dorsal spinal cord of MRS2211-treated DNP rats. Conclusion Intrathecal MRS2211 produces an anti-nociceptive effect in early-stage DNP. A possible mechanism involved in MRS2211-induced analgesia is that blocking the P2Y13 receptor downregulates levels of IL-1β and IL-6, which subsequently inhibit the activation of the JAK2/STAT3 signaling pathway. Furthermore, blocking the activation of the P2Y13 receptor can decrease NR2B-containing NMDAR phosphorylation in dorsal spinal cord neurons, thereby attenuating central sensitization in STZ-induced DNP rats.
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Affiliation(s)
- Rui Zhou
- Department of Physiology, Zunyi Medical College, Zunyi, People's Republic of China
| | - Tao Xu
- Department of Physiology, Zunyi Medical College, Zunyi, People's Republic of China
| | - XiaoHong Liu
- Department of Physiology, Zunyi Medical College, Zunyi, People's Republic of China
| | - YuanShou Chen
- Department of Physiology, Zunyi Medical College, Zunyi, People's Republic of China
| | - DeYing Kong
- Department of Physiology, Zunyi Medical College, Zunyi, People's Republic of China
| | - Hong Tian
- Department of Physiology, Zunyi Medical College, Zunyi, People's Republic of China
| | - Mingxia Yue
- Department of Physiology, Zunyi Medical College, Zunyi, People's Republic of China
| | - Dujuan Huang
- Department of Physiology, Zunyi Medical College, Zunyi, People's Republic of China
| | - Junwei Zeng
- Department of Physiology, Zunyi Medical College, Zunyi, People's Republic of China
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17
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18
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Remacle AG, Dolkas J, Angert M, Hullugundi SK, Chernov AV, Jones RCW 3rd, Shubayev VI, Strongin AY. A sensitive and selective ELISA methodology quantifies a demyelination marker in experimental and clinical samples. J Immunol Methods 2018; 455:80-7. [PMID: 29428829 DOI: 10.1016/j.jim.2018.02.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 02/05/2018] [Indexed: 12/29/2022]
Abstract
Sciatic nerve chronic constriction injury (CCI) in rodents produces nerve demyelination via proteolysis of myelin basic protein (MBP), the major component of myelin sheath. Proteolysis releases the cryptic MBP epitope, a demyelination marker, which is hidden in the native MBP fold. It has never been established if the proteolytic release of this cryptic MBP autoantigen stimulates the post-injury increase in the respective circulating autoantibodies. To measure these autoantibodies, we developed the ELISA that employed the cryptic 84-104 MBP sequence (MBP84-104) as bait. This allowed us, for the first time, to quantify the circulating anti-MBP84-104 autoantibodies in rat serum post-CCI. The circulating IgM (but not IgG) autoantibodies were detectable as soon as day 7 post-CCI. The IgM autoantibody level continually increased between days 7 and 28 post-injury. Using the rat serum samples, we established that the ELISA intra-assay (precision) and inter-assay (repeatability) variability parameters were 2.87% and 4.58%, respectively. We also demonstrated the ELISA specificity by recording the autoantibodies to the liberated MBP84-104 epitope alone, but not to intact MBP in which the 84-104 region is hidden. Because the 84-104 sequence is conserved among mammals, we tested if the ELISA was applicable to detect demyelination and quantify the respective autoantibodies in humans. Our limited pilot study that involved 16 female multiple sclerosis and fibromyalgia syndrome patients demonstrated that the ELISA was efficient in measuring both the circulating IgG- and IgM-type autoantibodies in patients exhibiting demyelination. We believe that the ELISA measurements of the circulating autoantibodies against the pathogenic MBP84-104 peptide may facilitate the identification of demyelination in both experimental and clinical settings. In clinic, these measurements may assist neurologists to recognize patients with painful neuropathy and demyelinating diseases, and as a result, to personalize their treatment regimens.
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19
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Affiliation(s)
- Klaus Heese
- Graduate School of Biomedical Science and Engineering, Hanyang University, Wangsimni-ro, Seongdong-gu, Seoul, Republic of Korea
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20
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Morioka N, Fujii S, Kondo S, Zhang FF, Miyauchi K, Nakamura Y, Hisaoka-Nakashima K, Nakata Y. Downregulation of spinal astrocytic connexin43 leads to upregulation of interleukin-6 and cyclooxygenase-2 and mechanical hypersensitivity in mice. Glia 2017; 66:428-444. [DOI: 10.1002/glia.23255] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 10/13/2017] [Accepted: 10/13/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Norimitsu Morioka
- Department of Pharmacology; Hiroshima University Graduate School of Biomedical & Health Sciences, 1-2-3 Kasumi; Minami-ku Hiroshima 734-8553 Japan
| | - Shiori Fujii
- Department of Pharmacology; Hiroshima University Graduate School of Biomedical & Health Sciences, 1-2-3 Kasumi; Minami-ku Hiroshima 734-8553 Japan
| | - Syun Kondo
- Department of Pharmacology; Hiroshima University Graduate School of Biomedical & Health Sciences, 1-2-3 Kasumi; Minami-ku Hiroshima 734-8553 Japan
| | - Fang Fang Zhang
- Department of Pharmacology; Hiroshima University Graduate School of Biomedical & Health Sciences, 1-2-3 Kasumi; Minami-ku Hiroshima 734-8553 Japan
- Institute of Pharmacology, Taishan Medical University, 619 Changcheng Road; Taian Shandong 271016 China
| | - Kazuki Miyauchi
- Department of Pharmacology; Hiroshima University Graduate School of Biomedical & Health Sciences, 1-2-3 Kasumi; Minami-ku Hiroshima 734-8553 Japan
| | - Yoki Nakamura
- Department of Pharmacology; Hiroshima University Graduate School of Biomedical & Health Sciences, 1-2-3 Kasumi; Minami-ku Hiroshima 734-8553 Japan
- Cellular Pathobiology Section, Integrative Neuroscience Research Branch, National Institute on Drug Abuse IRP, Triad Suite 3305, 333 Cassell Drive; Baltimore MD 21224
| | - Kazue Hisaoka-Nakashima
- Department of Pharmacology; Hiroshima University Graduate School of Biomedical & Health Sciences, 1-2-3 Kasumi; Minami-ku Hiroshima 734-8553 Japan
| | - Yoshihiro Nakata
- Department of Pharmacology; Hiroshima University Graduate School of Biomedical & Health Sciences, 1-2-3 Kasumi; Minami-ku Hiroshima 734-8553 Japan
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Woller SA, Eddinger KA, Corr M, Yaksh TL. An overview of pathways encoding nociception. Clin Exp Rheumatol 2017; 35 Suppl 107:40-46. [PMID: 28967373 PMCID: PMC6636838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 09/04/2017] [Indexed: 06/07/2023]
Abstract
The nervous system detects and interprets a variety of chemical, mechanical, and thermal stimuli. In the face of tissue injury, local inflammatory products perpetuate ongoing activity and sensitisation of the peripheral nerve termini. This ongoing activity evokes a state of robust spinal facilitation mediated by a number of local circuits, the net effect yielding an enhanced message of nociception to higher centres. This messaging typically wanes with the resolution of inflammation or wound healing. However, there are situations in which peripheral and central components of the pain transmission pathway extend and enhance the pain state, leading to a persistent hypersensitivity, e.g., an acute to chronic pain transition. Current work points to the contribution of innate and adaptive immunity in creating these enduring conditions. We briefly describe the underlying biological components of both physiological pain processing and pathological pain processing, as well as the acute to chronic pain transition and the role of innate and adaptive immunity in this transition.
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Affiliation(s)
- Sarah A Woller
- Department of Anesthesiology, University of California San Diego, La Jolla, CA, USA
| | - Kelly A Eddinger
- Department of Anesthesiology, University of California San Diego, La Jolla, CA, USA
| | - Maripat Corr
- Division of Rheumatology, Allergy, and Immunology, University of California San Diego, La Jolla, CA, USA
| | - Tony L Yaksh
- Department of Anesthesiology, University of California San Diego, La Jolla, CA, USA.
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22
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Abstract
Microglia are dynamic immune cells with diverse roles in maintaining homeostasis of the central nervous system. Dysregulation of microglia has been critically implicated in the genesis of neuropathic pain. Peripheral nerve injury, a common cause of neuropathic pain, engages microglia-neuronal signalling which causes disinhibition and facilitated excitation of spinal nociceptive pathways. However, recent literature indicates that the role of microglia in neuropathic pain is sexually dimorphic, and that female pain processing appears to be independent of microglia, depending rather on T cells. Despite this sex difference, pain signalling in the spinal cord converges downstream of microglia, as NMDAR-mediated facilitated excitation in pain transmitting neurons is consistent between males and females. Determining whether pain signalling is sexually dimorphic in humans and, further, addressing the sex bias in pain research will increase the translational relevance of preclinical findings and advance our understanding of chronic pain in women.
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Affiliation(s)
- Josiane C S Mapplebeck
- Program in Neurosciences & Mental Health, Hospital for Sick Children, Toronto, ON, Canada.,Department of Physiology, University of Toronto, Toronto, ON, Canada.,University of Toronto Centre for the Study of Pain, Toronto, ON, Canada
| | - Simon Beggs
- Developmental Neurosciences Programme, UCL Great Ormond Street Institute of Child Health, London, UK
| | - Michael W Salter
- Program in Neurosciences & Mental Health, Hospital for Sick Children, Toronto, ON, Canada. .,Department of Physiology, University of Toronto, Toronto, ON, Canada. .,University of Toronto Centre for the Study of Pain, Toronto, ON, Canada.
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23
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Hong S, Remacle AG, Shiryaev SA, Choi W, Hullugundi SK, Dolkas J, Angert M, Nishihara T, Yaksh TL, Strongin AY, Shubayev VI. Reciprocal relationship between membrane type 1 matrix metalloproteinase and the algesic peptides of myelin basic protein contributes to chronic neuropathic pain. Brain Behav Immun 2017; 60:282-292. [PMID: 27833045 PMCID: PMC5214638 DOI: 10.1016/j.bbi.2016.11.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 10/21/2016] [Accepted: 11/03/2016] [Indexed: 12/11/2022] Open
Abstract
Myelin basic protein (MBP) is an auto-antigen able to induce intractable pain from innocuous mechanical stimulation (mechanical allodynia). The mechanisms provoking this algesic MBP activity remain obscure. Our present study demonstrates that membrane type 1 matrix metalloproteinase (MT1-MMP/MMP-14) releases the algesic MBP peptides from the damaged myelin, which then reciprocally enhance the expression of MT1-MMP in nerve to sustain a state of allodynia. Specifically, MT1-MMP expression and activity in rat sciatic nerve gradually increased starting at day 3 after chronic constriction injury (CCI). Inhibition of the MT1-MMP activity by intraneural injection of the function-blocking human DX2400 monoclonal antibody at day 3 post-CCI reduced mechanical allodynia and neuropathological signs of Wallerian degeneration, including axon demyelination, degeneration, edema and formation of myelin ovoids. Consistent with its role in allodynia, the MT1-MMP proteolysis of MBP generated the MBP69-86-containing epitope sequences in vitro. In agreement, the DX2400 therapy reduced the release of the MBP69-86 epitope in CCI nerve. Finally, intraneural injection of the algesic MBP69-86 and control MBP2-18 peptides differentially induced MT1-MMP and MMP-2 expression in the nerve. With these data we offer a novel, self-sustaining mechanism of persistent allodynia via the positive feedback loop between MT1-MMP and the algesic MBP peptides. Accordingly, short-term inhibition of MT1-MMP activity presents a feasible pharmacological approach to intervene in this molecular circuit and the development of neuropathic pain.
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Affiliation(s)
- Sanghyun Hong
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA; VA San Diego Healthcare System, La Jolla, CA, USA; Department of Anesthesiology and Pain Medicine, Seoul St. Mary's Hospital, Catholic University of Korea, Seoul, South Korea
| | - Albert G Remacle
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Sergei A Shiryaev
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Wonjun Choi
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA; VA San Diego Healthcare System, La Jolla, CA, USA; Department of Anesthesiology and Pain Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University, Seoul, South Korea
| | - Swathi K Hullugundi
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA; VA San Diego Healthcare System, La Jolla, CA, USA
| | - Jennifer Dolkas
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA; VA San Diego Healthcare System, La Jolla, CA, USA
| | - Mila Angert
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA; VA San Diego Healthcare System, La Jolla, CA, USA
| | - Tasuku Nishihara
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA; VA San Diego Healthcare System, La Jolla, CA, USA
| | - Tony L Yaksh
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA
| | - Alex Y Strongin
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Veronica I Shubayev
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA; VA San Diego Healthcare System, La Jolla, CA, USA.
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Moreau N, Dieb W, Mauborgne A, Bourgoin S, Villanueva L, Pohl M, Boucher Y. Hedgehog Pathway-Mediated Vascular Alterations Following Trigeminal Nerve Injury. J Dent Res 2016; 96:450-457. [PMID: 27856965 DOI: 10.1177/0022034516679395] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Whereas neurovascular interactions in spinal neuropathic pain models have been well characterized, little attention has been given to such neurovascular interactions in orofacial neuropathic pain models. This study investigated in male Sprague-Dawley rats the vascular changes following chronic constriction injury (CCI) of the infraorbital nerve (IoN), a broadly validated preclinical model of orofacial neuropathic pain. Following IoN-CCI, an early downregulation of tight junction proteins Claudin-1 and Claudin-5 was observed within the endoneurium and perineurium, associated with increased local accumulation of sodium fluorescein (NaFlu) within the IoN parenchyma, as compared with sham animals. These events were evidence of local blood-nerve barrier disruption and increased vascular permeability. A significant upregulation of immunocytes (CD3, CD11b) and innate immunity (TLR2, TLR4) mRNA markers was also observed, suggestive of increased local inflammation. Finally, a significant downregulation of Hedgehog pathway readouts Patched-1 and Gli-1 was observed within the IoN after CCI and local injections of cyclopamine, a Hedgehog pathway inhibitor, replicated in naïve rats the molecular, vascular, and behavioral changes observed following IoN-CCI. These results suggest a major role of Hedgehog pathway inhibition in mediating local increased endoneurial and perineurial vascular permeability following trigeminal nerve injury, thus facilitating immunocytes infiltration, neuroinflammation development, and neuropathic pain-like aversive behavior.
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Affiliation(s)
- N Moreau
- 1 Centre de Psychiatrie et Neurosciences, Inserm U894, Paris, France.,2 Hôpital Bretonneau (AP-HP) & Faculté de chirurgie dentaire, Université Paris Descartes, Paris, France
| | - W Dieb
- 1 Centre de Psychiatrie et Neurosciences, Inserm U894, Paris, France.,3 Groupe Hospitalier Pitié Salpêtrière, Université Paris Diderot, Paris, France
| | - A Mauborgne
- 1 Centre de Psychiatrie et Neurosciences, Inserm U894, Paris, France
| | - S Bourgoin
- 1 Centre de Psychiatrie et Neurosciences, Inserm U894, Paris, France
| | - L Villanueva
- 1 Centre de Psychiatrie et Neurosciences, Inserm U894, Paris, France
| | - M Pohl
- 1 Centre de Psychiatrie et Neurosciences, Inserm U894, Paris, France
| | - Y Boucher
- 1 Centre de Psychiatrie et Neurosciences, Inserm U894, Paris, France.,3 Groupe Hospitalier Pitié Salpêtrière, Université Paris Diderot, Paris, France
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25
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Affiliation(s)
- Veronica I Shubayev
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA; VA San Diego Healthcare System, La Jolla, CA, USA
| | - Alex Y Strongin
- Sanford-Burnham-Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Tony L Yaksh
- Department of Anesthesiology, University of California, San Diego, La Jolla, CA, USA
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