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Sapio MR, Staedtler ES, King DM, Maric D, Jahanipour J, Ghetti A, Jacobson KA, Mannes AJ, Iadarola MJ. Analgesic candidate adenosine A3 receptors are expressed by perineuronal peripheral macrophages in human dorsal root ganglion and spinal cord microglia. Pain 2024:00006396-990000000-00583. [PMID: 38691673 DOI: 10.1097/j.pain.0000000000003242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 02/22/2024] [Indexed: 05/03/2024]
Abstract
ABSTRACT Adenosine receptors are a family of purinergic G protein-coupled receptors that are widely distributed in bodily organs and in the peripheral and central nervous systems. Recently, antihyperalgesic actions have been suggested for the adenosine A3 receptor, and its agonists have been proposed as new neuropathic pain treatments. We hypothesized that these receptors may be expressed in nociceptive primary afferent neurons. However, RNA sequencing across species, eg, rat, mouse, dog, and human, suggests that dorsal root ganglion (DRG) expression of ADORA3 is inconsistent. In rat and mouse, Adora3 shows very weak to no expression in DRG, whereas it is well expressed in human DRG. However, the cell types in human DRG that express ADORA3 have not been delineated. An examination of DRG cell types using in situ hybridization clearly detected ADORA3 transcripts in peripheral macrophages that are in close apposition to the neuronal perikarya but not in peripheral sensory neurons. By contrast, ADORA1 was found primarily in neurons, where it is broadly expressed at low levels. These results suggest that a more complex or indirect mechanism involving modulation of macrophage and/or microglial cells may underlie the potential analgesic action of adenosine A3 receptor agonism.
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Affiliation(s)
- Matthew R Sapio
- Department of Perioperative Medicine, Clinical Center, National Institutes of Health, Bethesda, MD, United States
| | - Ellen S Staedtler
- Department of Perioperative Medicine, Clinical Center, National Institutes of Health, Bethesda, MD, United States
| | - Diana M King
- Department of Perioperative Medicine, Clinical Center, National Institutes of Health, Bethesda, MD, United States
| | - Dragan Maric
- National Institute of Neurological Disorders and Stroke, Flow and Imaging Cytometry Core Facility, Bethesda, MD, United States
| | - Jahandar Jahanipour
- National Institute of Neurological Disorders and Stroke, Flow and Imaging Cytometry Core Facility, Bethesda, MD, United States
| | - Andre Ghetti
- AnaBios Corporation, San Diego, CA, United States
| | - Kenneth A Jacobson
- National Institute of Diabetes and Digestive and Kidney Diseases, Molecular Recognition Section, Laboratory of Bioorganic Chemistry, Bethesda, MD, United States
| | - Andrew J Mannes
- Department of Perioperative Medicine, Clinical Center, National Institutes of Health, Bethesda, MD, United States
| | - Michael J Iadarola
- Department of Perioperative Medicine, Clinical Center, National Institutes of Health, Bethesda, MD, United States
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Ye Y, Cheng H, Wang Y, Sun Y, Zhang LD, Tang J. Macrophage: A key player in neuropathic pain. Int Rev Immunol 2024:1-14. [PMID: 38661566 DOI: 10.1080/08830185.2024.2344170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Accepted: 04/13/2024] [Indexed: 04/26/2024]
Abstract
Research on the relationship between macrophages and neuropathic pain has flourished in the past two decades. It has long been believed that macrophages are strong immune effector cells that play well-established roles in tissue homeostasis and lesions, such as promoting the initiation and progression of tissue injury and improving wound healing and tissue remodeling in a variety of pathogenesis-related diseases. They are also heterogeneous and versatile cells that can switch phenotypically/functionally in response to the micro-environment signals. Apart from microglia (resident macrophages of both the spinal cord and brain), which are required for the neuropathic pain processing of the CNS, neuropathic pain signals in PNS are influenced by the interaction of tissue-resident macrophages and BM infiltrating macrophages with primary afferent neurons. And the current review looks at new evidence that suggests sexual dimorphism in neuropathic pain are caused by variations in the immune system, notably macrophages, rather than the neurological system.
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Affiliation(s)
- Ying Ye
- Department of Anesthesiology, Jinling Hospital, Affiliated Hospital of Nanjing Medical University, Nanjing, PR China
| | - Hao Cheng
- Department of Anesthesiology, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, PR China
| | - Yan Wang
- Department of Anesthesiology, Jinling Hospital, Affiliated Hospital of Nanjing Medical University, Nanjing, PR China
| | - Yan Sun
- Department of Anesthesiology, Jinling Hospital, Affiliated Hospital of Nanjing Medical University, Nanjing, PR China
| | - Li-Dong Zhang
- Department of Anesthesiology, Jinling Hospital, Affiliated Hospital of Nanjing Medical University, Nanjing, PR China
| | - Jun Tang
- Department of Anesthesiology, Jinling Hospital, Affiliated Hospital of Nanjing Medical University, Nanjing, PR China
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Sensory Neuron TLR4 mediates the development of nerve-injury induced mechanical hypersensitivity in female mice. Brain Behav Immun 2021; 97:42-60. [PMID: 34174335 PMCID: PMC8453057 DOI: 10.1016/j.bbi.2021.06.011] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 06/08/2021] [Accepted: 06/18/2021] [Indexed: 02/07/2023] Open
Abstract
Recent studies have brought to light the necessity to discern sex-specific differences in various pain states and different cell-types that mediate these differences. These studies have uncovered the role of neuroimmune interactions to mediate pain states in a sex-specific fashion. While investigating immune function in pain development, we discovered that females utilize immune components of sensory neurons to mediate neuropathic pain development. We utilized two novel transgenic mouse models that eitherrestore expression of toll-like receptor (TLR) 4 inNav1.8 nociceptors on a TLR4-null background (TLR4LoxTB) or remove TLR4 specifically from Nav1.8 nociceptors (TLR4fl/fl). After spared nerve injury (SNI), a model of neuropathic injury, we observed a robust female-specific onset of mechanical hypersensitivity in our transgenic animals. Female Nav1.8-TLR4fl/fl knockout animals were less mechanically sensitive than cre-negative TLR4fl/fl littermates. Conversely, female Nav1.8-TLR4LoxTB reactivated animals were as mechanically sensitive as their wild-type counterparts. These sex and cell-specific effects were not recapitulated in male animals of either strain. Additionally, we find the danger associated molecular pattern, high mobility group box-1 (HGMB1), a potent TLR4 agonist, localization and ATF3 expression in females is dependent on TLR4 expression in dorsal root ganglia (DRG) populations following SNI. These experiments provide novel evidence toward sensory neuron specific modulation of pain in a sex-dependent manner.
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Hsu YC, Ma KH, Guo SL, Lin BF, Tsai CS, Yeh CC. The Occurrence of Pain-Induced Depression Is Different between Rat Models of Inflammatory and Neuropathic Pain. J Clin Med 2021; 10:jcm10174016. [PMID: 34501464 PMCID: PMC8432452 DOI: 10.3390/jcm10174016] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 08/18/2021] [Accepted: 09/02/2021] [Indexed: 12/15/2022] Open
Abstract
Various pain conditions may be associated with depressed mood. However, the effect of inflammatory or neuropathic pain on depression-like behavior and its associated time frame has not been well established in rat models. This frontward study investigated the differences in pain behavior, depression-like behavior, and serotonin transporter (SERT) distribution in the brain between rats subjected to spared nerve injury (SNI)-induced neuropathic pain or complete Freund’s adjuvant (CFA)-induced inflammatory pain. A dynamic plantar aesthesiometer and an acetone spray test were used to evaluate mechanical and cold allodynia responses, and depression-like behavior was examined using a forced swimming test and sucrose preference test. We also investigated SERT expression by using positron emission tomography. We found that the inflammation-induced pain was less severe than neuropathic pain from days 3 to 28 after induced pain; however, the CFA-injected rats exhibited more noticeable depression-like behavior and had significantly reduced SERT expression in the brain regions (thalamus and striatum) at an early stage (on days 14, 21, and 28 in two groups of CFA-injected rats versus day 28 in SNI rats). We speculated that not only the pain response after initial injury but also the subsequent neuroinflammation may have been the crucial factors influencing depression-like behavior in rats.
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Affiliation(s)
- Yung-Chi Hsu
- Department of Anesthesiology, Tri-Service General Hospital, National Defense Medical Center, Taipei 114, Taiwan; (Y.-C.H.); (S.-L.G.); (B.-F.L.)
- Integrated Pain Management Center, Tri-Service General Hospital, National Defense Medical Center, Taipei 114, Taiwan
| | - Kuo-Hsing Ma
- Department of Biology and Anatomy, National Defense Medical Center, Taipei 114, Taiwan;
| | - Shu-Lin Guo
- Department of Anesthesiology, Tri-Service General Hospital, National Defense Medical Center, Taipei 114, Taiwan; (Y.-C.H.); (S.-L.G.); (B.-F.L.)
- Department of Anesthesiology, Cathay General Hospital, Taipei 106, Taiwan
- School of Medicine, Fu Jen Catholic University, New Taipei City 242, Taiwan
| | - Bo-Feng Lin
- Department of Anesthesiology, Tri-Service General Hospital, National Defense Medical Center, Taipei 114, Taiwan; (Y.-C.H.); (S.-L.G.); (B.-F.L.)
- Integrated Pain Management Center, Tri-Service General Hospital, National Defense Medical Center, Taipei 114, Taiwan
| | - Chien-Sung Tsai
- Division of Cardiovascular Surgery, Department of Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei 114, Taiwan;
- Department and Graduate Institute of Pharmacology, National Defense Medical Center, Taipei 114, Taiwan
| | - Chun-Chang Yeh
- Department of Anesthesiology, Tri-Service General Hospital, National Defense Medical Center, Taipei 114, Taiwan; (Y.-C.H.); (S.-L.G.); (B.-F.L.)
- Integrated Pain Management Center, Tri-Service General Hospital, National Defense Medical Center, Taipei 114, Taiwan
- Correspondence: ; Tel.: +886-2-8792-3311 (ext. 17051); Fax: +886-2-8792-7127
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