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Raut NG, Maile LA, Oswalt LM, Mitxelena I, Adlakha A, Sprague KL, Rupert AR, Bokros L, Hofmann MC, Patritti-Cram J, Rizvi TA, Queme LF, Choi K, Ratner N, Jankowski MP. Schwann cells modulate nociception in neurofibromatosis 1. JCI Insight 2024; 9:e171275. [PMID: 38258905 PMCID: PMC10906222 DOI: 10.1172/jci.insight.171275] [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: 04/10/2023] [Accepted: 11/28/2023] [Indexed: 01/24/2024] Open
Abstract
Pain of unknown etiology is frequent in individuals with the tumor predisposition syndrome neurofibromatosis 1 (NF1), even when tumors are absent. Nerve Schwann cells (SCs) were recently shown to play roles in nociceptive processing, and we find that chemogenetic activation of SCs is sufficient to induce afferent and behavioral mechanical hypersensitivity in wild-type mice. In mouse models, animals showed afferent and behavioral hypersensitivity when SCs, but not neurons, lacked Nf1. Importantly, hypersensitivity corresponded with SC-specific upregulation of mRNA encoding glial cell line-derived neurotrophic factor (GDNF), independently of the presence of tumors. Neuropathic pain-like behaviors in the NF1 mice were inhibited by either chemogenetic silencing of SC calcium or by systemic delivery of GDNF-targeting antibodies. Together, these findings suggest that alterations in SCs directly modulate mechanical pain and suggest cell-specific treatment strategies to ameliorate pain in individuals with NF1.
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Affiliation(s)
- Namrata G.R. Raut
- Department of Anesthesia, Division of Pain Management, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
| | - Laura A. Maile
- Department of Anesthesia, Division of Pain Management, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
| | - Leila M. Oswalt
- Department of Anesthesia, Division of Pain Management, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
| | - Irati Mitxelena
- Department of Anesthesia, Division of Pain Management, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
| | - Aaditya Adlakha
- Department of Anesthesia, Division of Pain Management, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
| | - Kourtney L. Sprague
- Department of Anesthesia, Division of Pain Management, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
| | - Ashley R. Rupert
- Department of Anesthesia, Division of Pain Management, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
| | - Lane Bokros
- Department of Anesthesia, Division of Pain Management, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
| | - Megan C. Hofmann
- Department of Anesthesia, Division of Pain Management, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
| | - Jennifer Patritti-Cram
- Graduate Program in Neuroscience, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
- Division of Cancer Biology and Experimental Hematology and
| | - Tilat A. Rizvi
- Division of Cancer Biology and Experimental Hematology and
| | - Luis F. Queme
- Department of Anesthesia, Division of Pain Management, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
- Pediatric Pain Research Center, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
| | - Kwangmin Choi
- Division of Cancer Biology and Experimental Hematology and
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Nancy Ratner
- Division of Cancer Biology and Experimental Hematology and
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Michael P. Jankowski
- Department of Anesthesia, Division of Pain Management, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
- Pediatric Pain Research Center, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
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Patritti-Cram J, Coover RA, Jankowski MP, Ratner N. Purinergic signaling in peripheral nervous system glial cells. Glia 2021; 69:1837-1851. [PMID: 33507559 PMCID: PMC8192487 DOI: 10.1002/glia.23969] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 01/11/2021] [Accepted: 01/12/2021] [Indexed: 01/02/2023]
Abstract
To facilitate analyses of purinergic signaling in peripheral nerve glia, we review recent literature and catalog purinergic receptor mRNA expression in cultured mouse Schwann cells (SCs). Purinergic signaling can decrease developmental SC proliferation, and promote SC differentiation. The purinergic receptors P2RY2 and P2RX7 are implicated in nerve development and in the ratio of Remak SCs to myelinating SCs in differentiated peripheral nerve. P2RY2, P2RX7, and other receptors are also implicated in peripheral neuropathies and SC tumors. In SC tumors lacking the tumor suppressor NF1, the SC pathway that suppresses SC growth through P2RY2‐driven β‐arrestin‐mediated AKT signaling is aberrant. SC‐released purinergic agonists acting through SC and/or neuronal purinergic receptors activate pain responses. In all these settings, purinergic receptor activation can result in calcium‐independent and calcium‐dependent release of SC ATP and UDP, growth factors, and cytokines that may contribute to disease and nerve repair. Thus, current research suggests that purinergic agonists and/or antagonists might have the potential to modulate peripheral glia function in development and in disease.
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Affiliation(s)
- Jennifer Patritti-Cram
- Division of Experimental Hematology and Cancer Biology, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA.,Neuroscience Graduate Program, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Robert A Coover
- Division of Experimental Hematology and Cancer Biology, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA.,Department of Basic Pharmaceutical Sciences, High Point University, High Point, North Carolina, USA
| | - Michael P Jankowski
- Department of Anesthesia, Division of Pain Management, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA.,Center for Understanding Pediatric Pain, Cincinnati Children's Hospital Medical Center and University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Nancy Ratner
- Division of Experimental Hematology and Cancer Biology, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, USA
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Mitchell R, Campbell G, Mikolajczak M, McGill K, Mahad D, Fleetwood-Walker SM. A Targeted Mutation Disrupting Mitochondrial Complex IV Function in Primary Afferent Neurons Leads to Pain Hypersensitivity Through P2Y 1 Receptor Activation. Mol Neurobiol 2019; 56:5917-5933. [PMID: 30689196 DOI: 10.1007/s12035-018-1455-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 12/14/2018] [Indexed: 01/20/2023]
Abstract
As mitochondrial dysfunction is evident in neurodegenerative disorders that are accompanied by pain, we generated inducible mutant mice with disruption of mitochondrial respiratory chain complex IV, by COX10 deletion limited to sensory afferent neurons through the use of an Advillin Cre-reporter. COX10 deletion results in a selective energy-deficiency phenotype with minimal production of reactive oxygen species. Mutant mice showed reduced activity of mitochondrial respiratory chain complex IV in many sensory neurons, increased ADP/ATP ratios in dorsal root ganglia and dorsal spinal cord synaptoneurosomes, as well as impaired mitochondrial membrane potential, in these synaptoneurosome preparations. These changes were accompanied by marked pain hypersensitivity in mechanical and thermal (hot and cold) tests without altered motor function. To address the underlying basis, we measured Ca2+ fluorescence responses of dorsal spinal cord synaptoneurosomes to activation of the GluK1 (kainate) receptor, which we showed to be widely expressed in small but not large nociceptive afferents, and is minimally expressed elsewhere in the spinal cord. Synaptoneurosomes from mutant mice showed greatly increased responses to GluK1 agonist. To explore whether altered nucleotide levels may play a part in this hypersensitivity, we pharmacologically interrogated potential roles of AMP-kinase and ADP-sensitive purinergic receptors. The ADP-sensitive P2Y1 receptor was clearly implicated. Its expression in small nociceptive afferents was increased in mutants, whose in vivo pain hypersensitivity, in mechanical, thermal and cold tests, was reversed by a selective P2Y1 antagonist. Energy depletion and ADP elevation in sensory afferents, due to mitochondrial respiratory chain complex IV deficiency, appear sufficient to induce pain hypersensitivity, by ADP activation of P2Y1 receptors.
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MESH Headings
- Adenosine Diphosphate/metabolism
- Adenosine Monophosphate/metabolism
- Alkyl and Aryl Transferases/metabolism
- Animals
- Behavior, Animal
- Calcium/metabolism
- Cells, Cultured
- Electron Transport Complex IV/genetics
- Electron Transport Complex IV/metabolism
- Fluorescence
- Ganglia, Spinal/drug effects
- Ganglia, Spinal/metabolism
- Hypersensitivity/complications
- Hypersensitivity/pathology
- Membrane Proteins/metabolism
- Mice, Inbred C57BL
- Mice, Transgenic
- Mitochondria/drug effects
- Mitochondria/metabolism
- Mutation/genetics
- Neurons, Afferent/drug effects
- Neurons, Afferent/metabolism
- Neurons, Afferent/pathology
- Nociception/drug effects
- Pain/complications
- Pain/pathology
- Phenotype
- Purinergic P2Y Receptor Antagonists/pharmacology
- Receptors, Kainic Acid/metabolism
- Receptors, Purinergic P2Y1/metabolism
- Spinal Cord/pathology
- Synapses/drug effects
- Synapses/metabolism
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Affiliation(s)
- Rory Mitchell
- Centre for Discovery Brain Sciences, Edinburgh Medical School: Biomedical Sciences, College of Medicine and Veterinary Medicine, University of Edinburgh, Hugh Robson Building, George Square, Edinburgh, EH8 9XD, UK
| | - Graham Campbell
- Centre for Clinical Brain Sciences, Edinburgh Medical School, College of Medicine and Veterinary Medicine, University of Edinburgh, Chancellor's Building, Little France, Edinburgh, Edinburgh, EH16 4SB, UK
| | - Marta Mikolajczak
- Centre for Discovery Brain Sciences, Edinburgh Medical School: Biomedical Sciences, College of Medicine and Veterinary Medicine, University of Edinburgh, Hugh Robson Building, George Square, Edinburgh, EH8 9XD, UK
| | - Katie McGill
- Centre for Clinical Brain Sciences, Edinburgh Medical School, College of Medicine and Veterinary Medicine, University of Edinburgh, Chancellor's Building, Little France, Edinburgh, Edinburgh, EH16 4SB, UK
| | - Don Mahad
- Centre for Clinical Brain Sciences, Edinburgh Medical School, College of Medicine and Veterinary Medicine, University of Edinburgh, Chancellor's Building, Little France, Edinburgh, Edinburgh, EH16 4SB, UK
| | - Sue M Fleetwood-Walker
- Centre for Discovery Brain Sciences, Edinburgh Medical School: Biomedical Sciences, College of Medicine and Veterinary Medicine, University of Edinburgh, Hugh Robson Building, George Square, Edinburgh, EH8 9XD, UK.
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Nencini S, Thai J, Ivanusic JJ. Sequestration of artemin reduces inflammation-induced activation and sensitization of bone marrow nociceptors in a rodent model of carrageenan-induced inflammatory bone pain. Eur J Pain 2018; 23:397-409. [PMID: 30218545 DOI: 10.1002/ejp.1315] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 08/15/2018] [Accepted: 09/04/2018] [Indexed: 01/10/2023]
Abstract
BACKGROUND Pathologies that affect the bone marrow have a significant inflammatory component; however, it is not clear how inflammatory mediators affect nociceptive nerve terminals within the marrow cavity. METHODS In this study, an in vivo bone-nerve preparation was used to directly record the physiological response properties of bone marrow nociceptors innervating the tibial marrow cavity of rats, before and after application of the inflammatory agent carrageenan. In addition, endogenous artemin was sequestered by application of an artemin neutralizing antibody to determine if this could prevent the inflammation-induced physiological changes observed. RESULTS A single injection of carrageenan administered into the tibial marrow cavity produced rapid changes in weight bearing (pain-like behaviour) in conscious animals. Carrageenan, but not saline, activated bone marrow nociceptors in whole-nerve recordings and sensitized a subtype of Aδ-bone marrow nociceptors to mechanical stimulation. The activation and sensitization had a rapid time course that matched that of pain-like behaviours. Sequestration of endogenous artemin significantly reduced carrageenan-induced increases in ongoing activity and completely abolished sensitization of bone marrow nociceptors to mechanical stimulation. CONCLUSIONS These observations indicate that inflammation affects the activity and sensitivity of bone marrow nociceptors; that artemin plays a role in these changes; and that artemin might be a promising target for pharmacological manipulations in the treatment of inflammatory bone pain. SIGNIFICANCE Most pathologies that affect the bone marrow have an inflammatory component. We have used a model of carrageenan-induced inflammation to show that sequestration of artemin reduces inflammation-induced activation and sensitization of bone marrow nociceptors. Our findings suggest that artemin signalling is a target for the treatment of inflammatory bone pain.
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Affiliation(s)
- Sara Nencini
- Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Victoria, Australia
| | - Jenny Thai
- Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Victoria, Australia
| | - Jason J Ivanusic
- Department of Anatomy and Neuroscience, University of Melbourne, Melbourne, Victoria, Australia
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