501
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Architecture of antimicrobial skin defense. Cytokine Growth Factor Rev 2019; 49:70-84. [PMID: 31473081 DOI: 10.1016/j.cytogfr.2019.08.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 08/14/2019] [Indexed: 02/07/2023]
Abstract
The skin is the largest and the most exposed organ in the body and its defense is regulated at several anatomical levels. Here, we explore how skin layers, including the epidermis, dermis, adipose tissue, and skin appendages, as well as cutaneous microbiota, contribute to the function of skin antimicrobial defense. We highlight recent studies that reveal the differential and complementary responses of skin layers to bacterial, viral, and fungal infection. In particular, we focus on key soluble mediators in the layered skin defense, such as antimicrobial peptides, as well as on lipid antimicrobials, cytokines, chemokines, and barrier-maintaining molecules. We include our own evaluative analyses of transcriptomic datasets of human skin to map the involvement of antimicrobial peptides in skin protection under both steady state and infectious conditions. Furthermore, we explore the versatility of the mechanisms underlying skin defense by highlighting the role of the immune and nervous systems in their interaction with cutaneous microbes, and by illustrating the multifunctionality of selected antimicrobial peptides in skin protection.
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502
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Magadan S, Jouneau L, Boudinot P, Salinas I. Nasal Vaccination Drives Modifications of Nasal and Systemic Antibody Repertoires in Rainbow Trout. THE JOURNAL OF IMMUNOLOGY 2019; 203:1480-1492. [PMID: 31413108 DOI: 10.4049/jimmunol.1900157] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 07/09/2019] [Indexed: 12/28/2022]
Abstract
Bony fish represent the most basal vertebrate branch with a dedicated mucosal immune system, which comprises immunologically heterogeneous microenvironments armed with innate and adaptive components. In rainbow trout (Oncorhynchus mykiss), a nasopharynx-associated lymphoid tissue (NALT) was recently described as a diffuse network of myeloid and lymphoid cells located in the olfactory organ of fish. Several studies have demonstrated high levels of protection conferred by nasal vaccines against viral and bacterial pathogens; however, the mechanisms underlying the observed protection are not well understood. We applied 5'RACE and a deep sequencing-based approach to investigate the clonal structure of the systemic and mucosal rainbow trout B cell repertoire. The analysis of Ig repertoire in control trout suggests different structures of IgM and IgT spleen and NALT repertoires, with restricted repertoire diversity in NALT. Nasal and injection vaccination with a bacterial vaccine revealed unique dynamics of IgM and IgT repertoires at systemic and mucosal sites and the remarkable ability of nasal vaccines to induce spleen Ig responses. Our findings provide an important immunological basis for the effectiveness of nasal vaccination in fish and other vertebrate animals and will help the design of future nasal vaccination strategies.
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Affiliation(s)
- Susana Magadan
- Center of Evolutionary and Theoretical Immunology, Department of Biology, University of New Mexico, Albuquerque, NM 87131.,Immunology Laboratory, Biomedical Research Center (CINBIO), University of Vigo, Vigo, 36310 Pontevedra, Spain; and
| | - Luc Jouneau
- Virologie et Immunologie Moleculaires, Institut National de la Recherche Agronomique, Université Paris-Saclay, 78352 Jouy-en-Josas Cedex, France
| | - Pierre Boudinot
- Virologie et Immunologie Moleculaires, Institut National de la Recherche Agronomique, Université Paris-Saclay, 78352 Jouy-en-Josas Cedex, France
| | - Irene Salinas
- Center of Evolutionary and Theoretical Immunology, Department of Biology, University of New Mexico, Albuquerque, NM 87131;
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503
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Pinho-Ribeiro FA. Living on the edge: Pain control by blood leukocytes at the borders of the central nervous system. J Leukoc Biol 2019; 106:509-511. [PMID: 31378970 DOI: 10.1002/jlb.4ce0619-175r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 07/03/2019] [Accepted: 07/11/2019] [Indexed: 11/10/2022] Open
Abstract
Discussion on the impact of blood leukocytes accumulating at the borders of the central nervous system on the development of neuropathic pain.
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Affiliation(s)
- Felipe A Pinho-Ribeiro
- Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, Massachusetts, USA
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504
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Barry CM, Matusica D, Haberberger RV. Emerging Evidence of Macrophage Contribution to Hyperinnervation and Nociceptor Sensitization in Vulvodynia. Front Mol Neurosci 2019; 12:186. [PMID: 31447644 PMCID: PMC6691023 DOI: 10.3389/fnmol.2019.00186] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 07/19/2019] [Indexed: 12/16/2022] Open
Abstract
Vulvodynia is an idiopathic chronic pain disorder and a leading cause of dyspareunia, or pain associated with sexual intercourse, for women. The key pathophysiological features of vulvodynia are vaginal hyperinnervation and nociceptor sensitization. These features have been described consistently by research groups over the past 30 years, but currently there is no first-line recommended treatment that targets this pathophysiology. Instead, psychological interventions, pelvic floor physiotherapy and surgery to remove painful tissue are recommended, as these are the few interventions that have shown some benefit in clinical trials. Recurrence of vulvodynia is frequent, even after vestibulectomy and questions regarding etiology remain. Vestibular biopsies from women with vulvodynia contain increased abundance of immune cells including macrophages as well as increased numbers of nerve fibers. Macrophages have multiple roles in the induction and resolution of inflammation and their function can be broadly described as pro-inflammatory or anti-inflammatory depending on their polarization state. This state is not fixed and can alter rapidly in response to the microenvironment. Essentially, M1, or classically activated macrophages, produce pro-inflammatory cytokines and promote nociceptor sensitization and mechanical allodynia, whereas M2, or alternatively activated macrophages produce anti-inflammatory cytokines and promote functions such as wound healing. Signaling between macrophages and neurons has been shown to promote axonal sprouting and nociceptor sensitization. This mini review considers emerging evidence that macrophages may play a role in nociceptor sensitization and hyperinnervation relevant to vulvodynia and considers the implications for development of new therapeutic strategies.
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Affiliation(s)
- Christine Mary Barry
- Musculoskeletal Neurobiology Laboratory, Centre for Neuroscience, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Dusan Matusica
- Pain and Pulmonary Neurobiology Laboratory, Centre for Neuroscience, Órama Institute, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Rainer Viktor Haberberger
- Pain and Pulmonary Neurobiology Laboratory, Centre for Neuroscience, Órama Institute, College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
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505
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Moehring F, Halder P, Seal RP, Stucky CL. Uncovering the Cells and Circuits of Touch in Normal and Pathological Settings. Neuron 2019; 100:349-360. [PMID: 30359601 DOI: 10.1016/j.neuron.2018.10.019] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 10/08/2018] [Accepted: 10/09/2018] [Indexed: 01/18/2023]
Abstract
The sense of touch is fundamental as it provides vital, moment-to-moment information about the nature of our physical environment. Primary sensory neurons provide the basis for this sensation in the periphery; however, recent work demonstrates that touch transduction mechanisms also occur upstream of the sensory neurons via non-neuronal cells such as Merkel cells and keratinocytes. Within the spinal cord, deep dorsal horn circuits transmit innocuous touch centrally and also transform touch into pain in the setting of injury. Here non-neuronal cells play a key role in the induction and maintenance of persistent mechanical pain. This review highlights recent advances in our understanding of mechanosensation, including a growing appreciation for the role of non-neuronal cells in both touch and pain.
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Affiliation(s)
- Francie Moehring
- Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Priyabrata Halder
- Department of Neurobiology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA; Center for the Neural Basis of Cognition, Pittsburgh, PA 15213, USA
| | - Rebecca P Seal
- Department of Neurobiology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA; Center for the Neural Basis of Cognition, Pittsburgh, PA 15213, USA; Pittsburgh Center for Pain Research, Pittsburgh, PA 15213, USA
| | - Cheryl L Stucky
- Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
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506
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Weinberg R, Coulombe P, Polydefkis M, Caterina M. Pain mechanisms in hereditary palmoplantar keratodermas. Br J Dermatol 2019; 182:543-551. [DOI: 10.1111/bjd.17880] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/07/2019] [Indexed: 12/12/2022]
Affiliation(s)
- R.L. Weinberg
- Department of Neurosurgery Johns Hopkins School of Medicine Baltimore MD 21205 U.S.A
- Department of Biological Chemistry Johns Hopkins School of Medicine Baltimore MD 21205 U.S.A
- Solomon H. Snyder Department of Neuroscience Neurosurgery Pain Research Institute Johns Hopkins School of Medicine Baltimore MD 21205 U.S.A
| | - P.A. Coulombe
- Department of Cell and Developmental Biology University of Michigan Medical School Ann Arbor MI 48109 U.S.A
- Department of Dermatology University of Michigan Medical School Ann Arbor MI 48109 U.S.A
| | - M. Polydefkis
- Department of Neurology Johns Hopkins School of Medicine Baltimore MD 21205 U.S.A
| | - M.J. Caterina
- Department of Neurosurgery Johns Hopkins School of Medicine Baltimore MD 21205 U.S.A
- Department of Biological Chemistry Johns Hopkins School of Medicine Baltimore MD 21205 U.S.A
- Solomon H. Snyder Department of Neuroscience Neurosurgery Pain Research Institute Johns Hopkins School of Medicine Baltimore MD 21205 U.S.A
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507
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Uchitomi R, Hatazawa Y, Senoo N, Yoshioka K, Fujita M, Shimizu T, Miura S, Ono Y, Kamei Y. Metabolomic Analysis of Skeletal Muscle in Aged Mice. Sci Rep 2019; 9:10425. [PMID: 31320689 PMCID: PMC6639307 DOI: 10.1038/s41598-019-46929-8] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 07/08/2019] [Indexed: 12/27/2022] Open
Abstract
Sarcopenia is the age-induced, progressive loss of skeletal muscle mass and function. To better understand changes in skeletal muscle during sarcopenia, we performed a metabolomic analysis of skeletal muscle in young (8-week-old) and aged (28-month-old) mice by using capillary electrophoresis with electrospray ionization time-of-flight mass spectrometry. Principal component analysis showed clear changes in metabolites between young and aged mice. Glucose metabolism products were decreased in aged mice, specifically fructose 1,6-diphosphate (0.4-fold) and dihydroxyacetone phosphate (0.6-fold), possibly from decreased glycolytic muscle fibers. Multiple metabolic products associated with phospholipid metabolism were significantly changed in aged mice, which may reflect changes in cell membrane phospholipids of skeletal muscle. Products of polyamine metabolism, which are known to increase nucleic acid and protein synthesis, decreased in spermine (0.5-fold) and spermidine (0.6-fold) levels. By contrast, neurotransmitter levels were increased in skeletal muscle of aged mice, including acetylcholine (1.8-fold), histamine (2.6-fold), and serotonin (1.7-fold). The increase in acetylcholine might compensate for age-associated dropout of neuromuscular junctions, whereas the increases in histamine and serotonin might be due to muscle injury associated with aging. Further analysis focusing on the altered metabolites observed in this study will provide essential data for understanding aging muscles.
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Affiliation(s)
- Ran Uchitomi
- Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto, Japan
| | - Yukino Hatazawa
- Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto, Japan
| | - Nanami Senoo
- Laboratories of Nutritional Biochemistry, Graduate School of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka, Japan
| | - Kiyoshi Yoshioka
- Institute of Molecular Embryology and Genetics, Kumamoto University, Kumamoto, Japan
| | - Mariko Fujita
- Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto, Japan
| | - Takahiko Shimizu
- Department of Endocrinology, Hematology, and Geriatrics, Chiba University Graduate School of Medicine, Chiba, Japan.,Aging Stress Response Research Project Team, National Center for Geriatrics and Gerontology, Aichi, Japan
| | - Shinji Miura
- Laboratories of Nutritional Biochemistry, Graduate School of Nutritional and Environmental Sciences, University of Shizuoka, Shizuoka, Japan
| | - Yusuke Ono
- Institute of Molecular Embryology and Genetics, Kumamoto University, Kumamoto, Japan
| | - Yasutomi Kamei
- Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto, Japan.
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508
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Bjørklund G, Chirumbolo S, Dadar M, Pen JJ, Doşa MD, Pivina L, Semenova Y, Aaseth J. Insights on Nutrients as Analgesics in Chronic Pain. Curr Med Chem 2019; 27:6407-6423. [PMID: 31309880 DOI: 10.2174/0929867326666190712172015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 06/26/2019] [Accepted: 07/01/2019] [Indexed: 02/07/2023]
Abstract
Many serious inflammatory disorders and nutrient deficiencies induce chronic pain, and anti-inflammatory diets have been applied successfully to modify the inflammatory symptoms causing chronic pain. Numerous scientific data and clinical investigations have demonstrated that long-term inflammation could lead to an inappropriate or exaggerated sensibility to pain. In addition, some Non-steroidal Anti-inflammatory Drugs (NSAID), which directly act on the many enzymes involved in pain and inflammation, including cyclooxygenases, are used to dampen the algesic signal to the central nervous system, reducing the responses of soft C-fibers to pain stimuli. On the other hand, there are a few reports from both health authorities and physicians, reporting that decreased transmission of pain signals can be achieved and improved, depending on the patient's dietary habit. Many nutrients, as well as a suitable level of exercise (resistance training), are the best methods for improving the total mitochondrial capacity in muscle cells, which can lead to a reduction in sensitivity to pain, particularly by lowering the inflammatory signaling to C-fibers. According to the current literature, it could be proposed that chronic pain results from the changed ratio of neuropeptides, hormones, and poor nutritional status, often related to an underlying inflammatory disorder. The current review also evaluates the effective role of nutrition-related interventions on the severity of chronic pain. This review pointed out that nutritional interventions can have a positive effect on pain experience through the indirect inhibitory effect on prostaglandin E2 and attenuation of mitochondrial dysfunction caused by ischemia/reperfusion in skeletal muscle, improving the intracellular antioxidant defense system. These data highlight the need for more nutrition studies where chronic pain is the primary outcome, using accurate interventions. To date, no nutritional recommendation for chronic pain has been officially proposed. Therefore, the goal of this article is to explore pain management and pain modulation, searching for a mode of nutrition efficient in reducing pain.
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Affiliation(s)
- Geir Bjørklund
- Council for Nutritional and Environmental Medicine (CONEM), Mo i Rana, Norway
| | - Salvatore Chirumbolo
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy,CONEM Scientific Secretary, Verona, Italy
| | - Maryam Dadar
- Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
| | - Joeri J Pen
- Diabetes Clinic, Department of Internal Medicine, UZ Brussel, Vrije Universiteit Brussel (VUB), Brussels, Belgium,Department of Nutrition, UZ Brussel, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Monica Daniela Doşa
- Department of Pharmacology, Faculty of Medicine, Ovidius University, Constanta, Romania
| | - Lyudmila Pivina
- Semey Medical University, Semey, Kazakhstan,CONEM Kazakhstan Environmental Health and Safety Research Group, Semey Medical University, Semey, Kazakhstan
| | - Yulia Semenova
- Semey Medical University, Semey, Kazakhstan,CONEM Kazakhstan Environmental Health and Safety Research Group, Semey Medical University, Semey, Kazakhstan
| | - Jan Aaseth
- Research Department, Innlandet Hospital Trust, Brumunddal, Norway,Faculty of Health and Social Science, Inland Norway University of Applied Sciences, Elverum, Norway
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509
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McGonagle DG, McInnes IB, Kirkham BW, Sherlock J, Moots R. The role of IL-17A in axial spondyloarthritis and psoriatic arthritis: recent advances and controversies. Ann Rheum Dis 2019; 78:1167-1178. [PMID: 31278139 PMCID: PMC6788885 DOI: 10.1136/annrheumdis-2019-215356] [Citation(s) in RCA: 128] [Impact Index Per Article: 25.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 05/17/2019] [Accepted: 06/14/2019] [Indexed: 12/19/2022]
Abstract
Although the pathogenic mechanisms underlying axial spondyloarthritis (axSpA) and psoriatic arthritis (PsA) are not fully elucidated, several lines of evidence suggest that immune responses mediated by interleukin 17A (IL-17A) play a pivotal role in both diseases. This is best highlighted by the significant clinical efficacy shown with inhibitors of IL-17A in treating axSpA and PsA. Nevertheless, a number of knowledge gaps exist regarding the role of IL-17A in the pathophysiology of spondyloarthritis in man, including its cellular origin, its precise role in discrete disease processes such enthesitis, bone erosion, and bone formation, and the reasons for the discrepant responses to IL-17A inhibition observed in certain other spondyloarthritis manifestations. In this review, we focus on the latest data from studies investigating the role of IL-17A in ankylosing spondylitis (AS) and PsA that build on existing and emerging scientific knowledge in the field. Key remaining research questions are also highlighted to guide future research.
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Affiliation(s)
- Dennis G McGonagle
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Leeds, UK.,NIHR Leeds Musculoskeletal Biomedical Research Unit, Chapel Allerton, Leeds Teaching Hospital Trust, Leeds, UK
| | - Iain B McInnes
- Institute of Infection Immunity and Inflammation, University of Glasgow, Glasgow, UK
| | - Bruce W Kirkham
- Rheumatology Department, Guy's and Saint Thomas' NHS Foundation Trust, London, UK
| | - Jonathan Sherlock
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK.,Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Robert Moots
- Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, UK .,Department of Academic Rheumatology, Aintree University Hospital, Liverpool, UK
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510
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Abstract
Neuroimmune interaction is an emerging concept, wherein the nervous system modulates the immune system and vice versa. This concept is gaining attention as a novel therapeutic target in various inflammatory diseases including acute kidney injury (AKI). Vagus nerve stimulation or treatment with pulsed ultrasound activates the cholinergic anti-inflammatory pathway to prevent AKI in mice. The kidneys are innervated by sympathetic efferent and sensory afferent neurons, and these neurons also may play a role in the modulation of inflammation in AKI. In this review, we discuss several neural circuits with respect to the control of renal inflammation and AKI as well as optogenetics as a novel tool for understanding these complex neural circuits.
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Affiliation(s)
- Shinji Tanaka
- Division of Nephrology and Center for Immunity, Inflammation, and Regenerative Medicine, University of Virginia, Charlottesville, VA
| | - Mark D Okusa
- Division of Nephrology and Center for Immunity, Inflammation, and Regenerative Medicine, University of Virginia, Charlottesville, VA.
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511
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Balkrishna A, Sakat SS, Joshi K, Paudel S, Joshi D, Joshi K, Ranjan R, Gupta A, Bhattacharya K, Varshney A. Anti-Inflammatory and Anti-Arthritic Efficacies of an Indian Traditional Herbo-Mineral Medicine "Divya Amvatari Ras" in Collagen Antibody-Induced Arthritis (CAIA) Mouse Model Through Modulation of IL-6/IL-1β/TNF-α/NFκB Signaling. Front Pharmacol 2019; 10:659. [PMID: 31333447 PMCID: PMC6614787 DOI: 10.3389/fphar.2019.00659] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2018] [Accepted: 05/21/2019] [Indexed: 12/28/2022] Open
Abstract
Rheumatoid arthritis (RA) is defined as a chronic autoimmune inflammatory disorder that causes damage to limb joints and progressive injuries to secondary organs. Medical practitioners prescribe Methotrexate (MTX) as standard care medicine for treating RA. However, the long-term application of MTX has shown to have adverse health-related effects. Divya Amvatari Ras (DAR), an Indian Ayurvedic herbo-mineral formulation, has been described in ancient texts to provide relief from RA inflammation associated distress. Therefore, in the present study, we explored the biocompatibility, anti-inflammatory, and anti-arthritic efficacy of DAR using in vivo and in vitro disease models. Using carrageenan (CA)-stimulated Wistar rat paw edema model, we showed a reduction in inflammation-induced paw edema at human equivalent dose of DAR. Anti-rheumatic efficacy of DAR was studied using collagen-antibody cocktail (C-Ab) Induced Arthritis (CAIA) mouse model. The onset of RA in the CAIA mice was determined using parameters such as the increase in arthritis score, and induction of disease associated lesions in the ankle and knee joints, and increase in mechanical and thermal hyperalgesia. Treatment of CAIA animals with a human equivalent dose of DAR significantly reversed the RA-associated pathogenesis. These effects were comparable with the standard of care RA drug, MTX. DAR acted at multiple levels of inflammation associated with RA to reduce progressive pathogenesis. Animal serum biochemistry showed DAR was capable of ameliorating RA induced increase in liver enzyme Alanine Aminotransferase (ALT) and pro-inflammatory cytokine interleukin 6 (IL-6). In the lipopolysaccharide stimulated THP-1 cells, DAR was found to inhibit the release of IL-6, IL-1β, TNF-α, and upstream inflammatory gene regulatory protein, NFκB. The study endorsed the anti-arthritic and anti-inflammatory activity of the Indian Traditional herbo-mineral medicine, DAR. These results also confirm that DAR was highly biocompatible and would show minimal health-related side effects than those associated with standard of care MTX. Taken together, we show that the DAR could be utilized as a promising alternative or complementary therapy for treating rheumatoid arthritis.
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Affiliation(s)
- Acharya Balkrishna
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar, India.,University of Patanjali, Patanjali Yog Peeth, Haridwar, India
| | - Sachin Shridhar Sakat
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar, India
| | - Kheemraj Joshi
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar, India
| | - Sandeep Paudel
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar, India
| | - Deepika Joshi
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar, India
| | - Kamal Joshi
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar, India
| | - Ravikant Ranjan
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar, India
| | - Abhishek Gupta
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar, India
| | - Kunal Bhattacharya
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar, India.,Center for Nanotechnology and Nanotoxicology, Harvard T.H. Chan School of Public Health, Boston, MA, United States
| | - Anurag Varshney
- Drug Discovery and Development Division, Patanjali Research Institute, Haridwar, India.,University of Patanjali, Patanjali Yog Peeth, Haridwar, India
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512
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Abstract
Pain is a hallmark of tissue injury, inflammatory diseases, pathogen invasion and neuropathy. It is mediated by nociceptor sensory neurons that innervate the skin, joints, bones, muscles and mucosal tissues and protects organisms from noxious stimuli. Nociceptors are sensitized by inflammatory mediators produced by the immune system, including cytokines, lipid mediators and growth factors, and can also directly detect pathogens and their secreted products to produce pain during infection. Upon activation, nociceptors release neuropeptides from their terminals that potently shape the function of innate and adaptive immune cells. For some pathogens, neuron-immune interactions enhance host protection from infection, but for other pathogens, neuron-immune signalling pathways can be exploited to facilitate pathogen survival. Here, we discuss the role of nociceptor interactions with the immune system in pain and infection and how understanding these pathways could produce new approaches to treat infectious diseases and chronic pain.
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513
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Anti-hyperalgesic and anti-inflammatory effects of citral with β-cyclodextrin and hydroxypropyl-β-cyclodextrin inclusion complexes in animal models. Life Sci 2019; 229:139-148. [DOI: 10.1016/j.lfs.2019.05.026] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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514
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Chukwurah E, Osmundsen A, Davis SW, Lizarraga SB. All Together Now: Modeling the Interaction of Neural With Non-neural Systems Using Organoid Models. Front Neurosci 2019; 13:582. [PMID: 31293366 PMCID: PMC6598414 DOI: 10.3389/fnins.2019.00582] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 05/22/2019] [Indexed: 12/27/2022] Open
Abstract
The complex development of the human nervous system has been traditionally studied using a combination of animal models, human post-mortem brain tissue, and human genetics studies. However, there has been a lack of experimental human cellular models that would allow for a more precise elucidation of the intricate dynamics of early human brain development. The development of stem cell technologies, both embryonic and induced pluripotent stem cells (iPSCs), has given neuroscientists access to the previously inaccessible early stages of human brain development. In particular, the recent development of three-dimensional culturing methodologies provides a platform to study the differentiation of stem cells in both normal development and disease states in a more in vivo like context. Three-dimensional neural models or cerebral organoids possess an innate advantage over two-dimensional neural cultures as they can recapitulate tissue organization and cell type diversity that resemble the developing brain. Brain organoids also provide the exciting opportunity to model the integration of different brain regions in vitro. Furthermore, recent advances in the differentiation of non-neuronal tissue from stem cells provides the opportunity to study the interaction between the developing nervous system and other non-neuronal systems that impact neuronal function. In this review, we discuss the potential and limitations of the organoid system to study in vitro neurological diseases that arise in the neuroendocrine and the enteric nervous system or from interactions with the immune system.
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Affiliation(s)
- Evelyn Chukwurah
- Department of Biological Sciences, University of South Carolina, Columbia, SC, United States
- Center for Childhood Neurotherapeutics, University of South Carolina, Columbia, SC, United States
| | - Allison Osmundsen
- Department of Biological Sciences, University of South Carolina, Columbia, SC, United States
- Center for Childhood Neurotherapeutics, University of South Carolina, Columbia, SC, United States
| | - Shannon W. Davis
- Department of Biological Sciences, University of South Carolina, Columbia, SC, United States
- Center for Childhood Neurotherapeutics, University of South Carolina, Columbia, SC, United States
| | - Sofia B. Lizarraga
- Department of Biological Sciences, University of South Carolina, Columbia, SC, United States
- Center for Childhood Neurotherapeutics, University of South Carolina, Columbia, SC, United States
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515
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Sepahi A, Kraus A, Casadei E, Johnston CA, Galindo-Villegas J, Kelly C, García-Moreno D, Muñoz P, Mulero V, Huertas M, Salinas I. Olfactory sensory neurons mediate ultrarapid antiviral immune responses in a TrkA-dependent manner. Proc Natl Acad Sci U S A 2019; 116:12428-12436. [PMID: 31160464 DOI: 10.1101/464214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023] Open
Abstract
The nervous system regulates host immunity in complex ways. Vertebrate olfactory sensory neurons (OSNs) are located in direct contact with pathogens; however, OSNs' ability to detect danger and initiate immune responses is unclear. We report that nasal delivery of rhabdoviruses induces apoptosis in crypt OSNs via the interaction of the OSN TrkA receptor with the viral glycoprotein in teleost fish. This signal results in electrical activation of neurons and very rapid proinflammatory responses in the olfactory organ (OO), but dampened inflammation in the olfactory bulb (OB). CD8α+ cells infiltrate the OO within minutes of nasal viral delivery, and TrkA blocking, but not caspase-3 blocking, abrogates this response. Infiltrating CD8α+ cells were TCRαβ T cells with a nonconventional phenotype that originated from the microvasculature surrounding the OB and not the periphery. Nasal delivery of viral glycoprotein (G protein) recapitulated the immune responses observed with the whole virus, and antibody blocking of viral G protein abrogated these responses. Ablation of crypt neurons in zebrafish resulted in increased susceptibility to rhabdoviruses. These results indicate a function for OSNs as a first layer of pathogen detection in vertebrates and as orchestrators of nasal-CNS antiviral immune responses.
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Affiliation(s)
- Ali Sepahi
- Center of Evolutionary and Theoretical Immunology, Biology Department, University of New Mexico, Albuquerque, NM 87131
| | - Aurora Kraus
- Center of Evolutionary and Theoretical Immunology, Biology Department, University of New Mexico, Albuquerque, NM 87131
| | - Elisa Casadei
- Center of Evolutionary and Theoretical Immunology, Biology Department, University of New Mexico, Albuquerque, NM 87131
| | | | - Jorge Galindo-Villegas
- Department of Cell Biology and Histology, Faculty of Biology, Instituto Murciano de Investigación Biosanitaria-Arrixaca, Campus Universitario de Espinardo, University of Murcia, 30100 Murcia, Spain
- Faculty of Biosciences and Aquaculture, Nord University, 8049 Bodø, Norway
| | - Cecelia Kelly
- Center of Evolutionary and Theoretical Immunology, Biology Department, University of New Mexico, Albuquerque, NM 87131
| | - Diana García-Moreno
- Department of Cell Biology and Histology, Faculty of Biology, Instituto Murciano de Investigación Biosanitaria-Arrixaca, Campus Universitario de Espinardo, University of Murcia, 30100 Murcia, Spain
| | - Pilar Muñoz
- Department of Faculty of Veterinary, University of Murcia, 30100 Murcia, Spain
| | - Victoriano Mulero
- Department of Cell Biology and Histology, Faculty of Biology, Instituto Murciano de Investigación Biosanitaria-Arrixaca, Campus Universitario de Espinardo, University of Murcia, 30100 Murcia, Spain
| | - Mar Huertas
- Department of Biology, Texas State University, San Marcos, TX 78666
| | - Irene Salinas
- Center of Evolutionary and Theoretical Immunology, Biology Department, University of New Mexico, Albuquerque, NM 87131;
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516
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Blake KJ, Jiang XR, Chiu IM. Neuronal Regulation of Immunity in the Skin and Lungs. Trends Neurosci 2019; 42:537-551. [PMID: 31213389 DOI: 10.1016/j.tins.2019.05.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 04/26/2019] [Accepted: 05/16/2019] [Indexed: 02/07/2023]
Abstract
The nervous and immune systems are classically studied as two separate entities. However, their interactions are crucial for maintaining barrier functions at tissues constantly exposed to the external environment. We focus here on the role of neuronal signaling in regulating the immune system at two major barriers: the skin and respiratory tract. Barrier tissues are heavily innervated by sensory and autonomic nerves, and are densely populated by resident immune cells, allowing rapid, coordinated responses to noxious stimuli, as well as to bacterial and fungal pathogens. Neural release of neurotransmitters and neuropeptides allows fast communication with immune cells and their recruitment. In addition to maintaining homeostasis and fighting infections, neuroimmune interactions are also implicated in several chronic inflammatory conditions such as atopic dermatitis (AD), chronic obstructive pulmonary disease (COPD), and asthma.
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Affiliation(s)
- Kimbria J Blake
- Department of Immunology, Harvard Medical School, 77 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Xin Ru Jiang
- Department of Immunology, Harvard Medical School, 77 Avenue Louis Pasteur, Boston, MA 02115, USA; Department of Pathology, University of Cambridge, Tennis Court Road, Cambridge CB2 1QP, UK
| | - Isaac M Chiu
- Department of Immunology, Harvard Medical School, 77 Avenue Louis Pasteur, Boston, MA 02115, USA.
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517
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Olfactory sensory neurons mediate ultrarapid antiviral immune responses in a TrkA-dependent manner. Proc Natl Acad Sci U S A 2019; 116:12428-12436. [PMID: 31160464 DOI: 10.1073/pnas.1900083116] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The nervous system regulates host immunity in complex ways. Vertebrate olfactory sensory neurons (OSNs) are located in direct contact with pathogens; however, OSNs' ability to detect danger and initiate immune responses is unclear. We report that nasal delivery of rhabdoviruses induces apoptosis in crypt OSNs via the interaction of the OSN TrkA receptor with the viral glycoprotein in teleost fish. This signal results in electrical activation of neurons and very rapid proinflammatory responses in the olfactory organ (OO), but dampened inflammation in the olfactory bulb (OB). CD8α+ cells infiltrate the OO within minutes of nasal viral delivery, and TrkA blocking, but not caspase-3 blocking, abrogates this response. Infiltrating CD8α+ cells were TCRαβ T cells with a nonconventional phenotype that originated from the microvasculature surrounding the OB and not the periphery. Nasal delivery of viral glycoprotein (G protein) recapitulated the immune responses observed with the whole virus, and antibody blocking of viral G protein abrogated these responses. Ablation of crypt neurons in zebrafish resulted in increased susceptibility to rhabdoviruses. These results indicate a function for OSNs as a first layer of pathogen detection in vertebrates and as orchestrators of nasal-CNS antiviral immune responses.
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518
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Johnston KJA, Adams MJ, Nicholl BI, Ward J, Strawbridge RJ, Ferguson A, McIntosh AM, Bailey MES, Smith DJ. Genome-wide association study of multisite chronic pain in UK Biobank. PLoS Genet 2019; 15:e1008164. [PMID: 31194737 PMCID: PMC6592570 DOI: 10.1371/journal.pgen.1008164] [Citation(s) in RCA: 120] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 06/25/2019] [Accepted: 04/27/2019] [Indexed: 12/20/2022] Open
Abstract
Chronic pain is highly prevalent worldwide and represents a significant socioeconomic and public health burden. Several aspects of chronic pain, for example back pain and a severity-related phenotype 'chronic pain grade', have been shown previously to be complex heritable traits with a polygenic component. Additional pain-related phenotypes capturing aspects of an individual's overall sensitivity to experiencing and reporting chronic pain have also been suggested as a focus for investigation. We made use of a measure of the number of sites of chronic pain in individuals within the UK general population. This measure, termed Multisite Chronic Pain (MCP), is a complex trait and its genetic architecture has not previously been investigated. To address this, we carried out a large-scale genome-wide association study (GWAS) of MCP in ~380,000 UK Biobank participants. Our findings were consistent with MCP having a significant polygenic component, with a Single Nucleotide Polymorphism (SNP) heritability of 10.2%. In total 76 independent lead SNPs at 39 risk loci were associated with MCP. Additional gene-level association analyses identified neurogenesis, synaptic plasticity, nervous system development, cell-cycle progression and apoptosis genes as enriched for genetic association with MCP. Genetic correlations were observed between MCP and a range of psychiatric, autoimmune and anthropometric traits, including major depressive disorder (MDD), asthma and Body Mass Index (BMI). Furthermore, in Mendelian randomisation (MR) analyses a causal effect of MCP on MDD was observed. Additionally, a polygenic risk score (PRS) for MCP was found to significantly predict chronic widespread pain (pain all over the body), indicating the existence of genetic variants contributing to both of these pain phenotypes. Overall, our findings support the proposition that chronic pain involves a strong nervous system component with implications for our understanding of the physiology of chronic pain. These discoveries may also inform the future development of novel treatment approaches.
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Affiliation(s)
- Keira J. A. Johnston
- Institute of Health and Wellbeing, University of Glasgow, Scotland, United Kingdom
- Deanery of Molecular, Genetic and Population Health Sciences, College of Medicine and Veterinary Medicine, University of Edinburgh, Scotland, United Kingdom
- School of Life Sciences, College of Medical, Veterinary & Life Sciences, University of Glasgow, Scotland, United Kingdom
| | - Mark J. Adams
- Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Scotland, United Kingdom
| | - Barbara I. Nicholl
- Institute of Health and Wellbeing, University of Glasgow, Scotland, United Kingdom
| | - Joey Ward
- Institute of Health and Wellbeing, University of Glasgow, Scotland, United Kingdom
| | - Rona J. Strawbridge
- Institute of Health and Wellbeing, University of Glasgow, Scotland, United Kingdom
- Department of Medicine Solna, Karolinska Institute, Stockholm, Sweden
| | - Amy Ferguson
- Institute of Health and Wellbeing, University of Glasgow, Scotland, United Kingdom
| | - Andrew M. McIntosh
- Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, Scotland, United Kingdom
| | - Mark E. S. Bailey
- School of Life Sciences, College of Medical, Veterinary & Life Sciences, University of Glasgow, Scotland, United Kingdom
| | - Daniel J. Smith
- Institute of Health and Wellbeing, University of Glasgow, Scotland, United Kingdom
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519
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Herbo-mineral formulation 'Ashwashila' attenuates rheumatoid arthritis symptoms in collagen-antibody-induced arthritis (CAIA) mice model. Sci Rep 2019; 9:8025. [PMID: 31142786 PMCID: PMC6541602 DOI: 10.1038/s41598-019-44485-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 05/17/2019] [Indexed: 12/19/2022] Open
Abstract
Rheumatoid arthritis (RA) is a chronic inflammatory autoimmune disorder that affects joints of hands and feet and introduces injury in secondary organs such as cardiac tissue. In the present study, we induced RA in male Balb/c mice (CAIA) using collagen-antibody cocktail (C-Ab) and lipopolysaccharide intraperitoneal injections. Induction of RA in the animals was detected through the loss of body weight, food, and water consumption, pedal edema, increased arthritis score of the paw and ankle, increase in radiological and histological lesion score of ankle and knee joints and enhanced pain perception in the C-Ab induced RA animals. Ashwashila is a herbo-mineral medicine from Indian Ayurvedic system. Human equivalent doses of Ashwashila (ASHW) and standard of care, Methotrexate were given to the CAIA animals for two weeks. ASHW treatment significantly reversed the effect of C-Ab with reduced pedal edema, arthritis score, radiological and histological lesion scores in ankle-joint, knee-joint and articular cartilage, reduced pain perception. These effects were comparable with the Methotrexate treatment. In human monocytic (THP-1) cells, ASHW was found to be biocompatible at in-vitro test doses. The anti-arthritis mechanism of action for ASHW was established through the suppression of pro-inflammatory cytokines such as IL-1β, IL-6, TNF-α; and upstream regulator, NF-κB. Taken together, we show the pre-clinical efficacy of ASHW in reducing RA associated symptoms by controlling inflammation and suggest it as a potential therapeutic candidate for rheumatoid arthritis.
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520
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Alterations in evoked and spontaneous activity of dorsal horn wide dynamic range neurons in pathological pain: a systematic review and analysis. Pain 2019; 160:2199-2209. [DOI: 10.1097/j.pain.0000000000001632] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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521
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Borghi SM, Fattori V, Pinho-Ribeiro FA, Domiciano TP, Miranda-Sapla MM, Zaninelli TH, Casagrande R, Pinge-Filho P, Pavanelli WR, Alves-Filho JC, Cunha FQ, Cunha TM, Verri WA. Contribution of spinal cord glial cells to L. amazonensis experimental infection-induced pain in BALB/c mice. J Neuroinflammation 2019; 16:113. [PMID: 31138231 PMCID: PMC6540403 DOI: 10.1186/s12974-019-1496-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 04/30/2019] [Indexed: 12/30/2022] Open
Abstract
Background The cellular and molecular pathophysiological mecha\nisms of pain processing in neglected parasitic infections such as leishmaniasis remain unknown. The present study evaluated the participation of spinal cord glial cells in the pathophysiology of pain induced by Leishmania amazonensis infection in BALB/c mice. Methods Mice received intra-plantar (i.pl.) injection of L. amazonensis (1 × 105) and hyperalgesia, and paw edema were evaluated bilaterally for 40 days. The levels of TNF-α and IL-1β, MPO activity, and histopathology were assessed on the 40th day. ATF3 mRNA expression was assessed in DRG cells at the 30th day post-infection. Blood TNF-α and IL-1β levels and systemic parasite burden were evaluated 5–40 days after the infection. At the 30th day post-infection L. amazonensis, the effects of intrathecal (i.t.) treatments with neutralizing antibody anti-CX3CL1, etanercept (soluble TNFR2 receptor), and interleukin-1 receptor antagonist (IL-1ra) on infection-induced hyperalgesia and paw edema were assessed. In another set of experiments, we performed a time course analysis of spinal cord GFAP and Iba-1 (astrocytes and microglia markers, respectively) and used confocal immunofluorescence and Western blot to confirm the expression at the protein level. Selective astrocyte (α-aminoadipate) and microglia (minocycline) inhibitors were injected i.t. to determine the contribution of these cells to hyperalgesia and paw edema. The effects of i.t. treatments with glial and NFκB (PDTC) inhibitors on spinal glial activation, TNF-α, IL-1β, CX3CR1 and CX3CL1 mRNA expression, and NFκB activation were also evaluated. Finally, the contribution of TNF-α and IL-1β to CX3CL1 mRNA expression was investigated. Results L. amazonensis infection induced chronic mechanical and thermal hyperalgesia and paw edema in the infected paw. Mechanical hyperalgesia was also observed in the contralateral paw. TNF-α, IL-1β, MPO activity, and epidermal/dermal thickness increased in the infected paw, which confirmed the peripheral inflammation at the primary foci of this infection. ATF3 mRNA expression at the ipsilateral DRG of the infected paw was unaltered 30 days post-infection. TNF-α and IL-1β blood levels were not changed over the time course of disease, and parasitism increased in a time-dependent manner in the ipsilateral draining lymph node. Treatments targeting CX3CL1, TNF-α, and IL-1β inhibited L. amazonensis-induced ongoing mechanical and thermal hyperalgesia, but not paw edema. A time course of GFAP, Iba-1, and CX3CR1 mRNA expression indicated spinal activation of astrocytes and microglia, which was confirmed at the GFAP and Iba-1 protein level at the peak of mRNA expression (30th day). Selective astrocyte and microglia inhibition diminished infection-induced ipsilateral mechanical hyperalgesia and thermal hyperalgesia, and contralateral mechanical hyperalgesia, but not ipsilateral paw edema. Targeting astrocytes, microglia and NFκB diminished L. amazonensis-induced GFAP, Iba-1, TNF-α, IL-1β, CX3CR1 and CX3CL1 mRNA expression, and NFκB activation in the spinal cord at the peak of spinal cord glial cells activation. CX3CL1 mRNA expression was also detected in the ipsilateral DRG of infected mice at the 30th day post-infection, and the i.t. injection of TNF-α or IL-1β in naïve animals induced CX3CL1 mRNA expression in the spinal cord and ipsilateral DRG. Conclusions L. amazonensis skin infection produces chronic pain by central mechanisms involving spinal cord astrocytes and microglia-related production of cytokines and chemokines, and NFκB activation contributes to L. amazonensis infection-induced hyperalgesia and neuroinflammation. Electronic supplementary material The online version of this article (10.1186/s12974-019-1496-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Sergio M Borghi
- Departament of Pathology, Biological Sciences Center, Londrina State University, Rodovia Celso Garcia Cid, Pr 445, Km 380 Cx. Postal 10.011, Londrina, Paraná, CEP 86057-970, Brazil.,Center for Research in Health Sciences, University of Northern Paraná - Unopar, Rua Marselha, 591, Jardim Piza, Londrina, Paraná, 86041-140, Brazil
| | - Victor Fattori
- Departament of Pathology, Biological Sciences Center, Londrina State University, Rodovia Celso Garcia Cid, Pr 445, Km 380 Cx. Postal 10.011, Londrina, Paraná, CEP 86057-970, Brazil
| | - Felipe A Pinho-Ribeiro
- Departament of Pathology, Biological Sciences Center, Londrina State University, Rodovia Celso Garcia Cid, Pr 445, Km 380 Cx. Postal 10.011, Londrina, Paraná, CEP 86057-970, Brazil
| | - Talita P Domiciano
- Departament of Pathology, Biological Sciences Center, Londrina State University, Rodovia Celso Garcia Cid, Pr 445, Km 380 Cx. Postal 10.011, Londrina, Paraná, CEP 86057-970, Brazil
| | - Milena M Miranda-Sapla
- Departament of Pathology, Biological Sciences Center, Londrina State University, Rodovia Celso Garcia Cid, Pr 445, Km 380 Cx. Postal 10.011, Londrina, Paraná, CEP 86057-970, Brazil
| | - Tiago H Zaninelli
- Departament of Pathology, Biological Sciences Center, Londrina State University, Rodovia Celso Garcia Cid, Pr 445, Km 380 Cx. Postal 10.011, Londrina, Paraná, CEP 86057-970, Brazil
| | - Rubia Casagrande
- Departament of Pharmaceutical Sciences, Health Sciences Center, University Hospital, Londrina State University, Avenida Robert Koch, 60, Londrina, Paraná, 86038-350, Brazil
| | - Phileno Pinge-Filho
- Departament of Pathology, Biological Sciences Center, Londrina State University, Rodovia Celso Garcia Cid, Pr 445, Km 380 Cx. Postal 10.011, Londrina, Paraná, CEP 86057-970, Brazil
| | - Wander R Pavanelli
- Departament of Pathology, Biological Sciences Center, Londrina State University, Rodovia Celso Garcia Cid, Pr 445, Km 380 Cx. Postal 10.011, Londrina, Paraná, CEP 86057-970, Brazil
| | - Jose C Alves-Filho
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Avenida Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil
| | - Fernando Q Cunha
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Avenida Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil
| | - Thiago M Cunha
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Avenida Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil
| | - Waldiceu A Verri
- Departament of Pathology, Biological Sciences Center, Londrina State University, Rodovia Celso Garcia Cid, Pr 445, Km 380 Cx. Postal 10.011, Londrina, Paraná, CEP 86057-970, Brazil.
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522
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Pharmacological potential of alkylamides from Acmella oleracea flowers and synthetic isobutylalkyl amide to treat inflammatory pain. Inflammopharmacology 2019; 28:175-186. [DOI: 10.1007/s10787-019-00601-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 04/29/2019] [Indexed: 12/18/2022]
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523
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Wu Y, Wang Y, Wang J, Fan Q, Zhu J, Yang L, Rong W. TLR4 mediates upregulation and sensitization of TRPV1 in primary afferent neurons in 2,4,6-trinitrobenzene sulfate-induced colitis. Mol Pain 2019; 15:1744806919830018. [PMID: 30672380 PMCID: PMC6378437 DOI: 10.1177/1744806919830018] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Elevated excitability of primary afferent neurons underlies chronic pain in patients with functional or inflammatory bowel diseases. Recent studies have established an essential role for an enhanced transient receptor potential vanilloid subtype 1 (TRPV1) signaling in mediating peripheral hyperalgesia in inflammatory conditions. Since colocalization of Toll-like receptor 4 (TLR4) and TRPV1 has been observed in primary afferents including the trigeminal sensory neurons and the dorsal root ganglion neurons, we test the hypothesis that TLR4 might regulate the expression and function of TRPV1 in primary afferent neurons in 2,4,6-trinitrobenzene sulfate (TNBS)-induced colitis using the TLR4-deficient and the wild-type C57 mice. Despite having a higher disease activity index following administration of 2,4,6-trinitrobenzene sulfate, the TLR4-deficient mice showed less inflammatory infiltration in the colon than the wild-type mice. Increased expression of TLR4 and TRPV1 as well as increased density of capsaicin-induced TRPV1 current was observed in L4–S2 dorsal root ganglion neurons of the wild-type colitis mice till two weeks post 2,4,6-trinitrobenzene sulfate treatment. In comparison, the TLR4-deficient colitis mice had lower TRPV1 expression and TRPV1 current density in dorsal root ganglion neurons with lower abdominal withdrawal response scores during noxious colonic distensions. In the wild type but not in the TLR4-deficient dorsal root ganglion neurons, acute administration of the TLR4 agonist lipopolysaccharide increased the capsaicin-evoked TRPV1 current. In addition, we found that the canonical signaling downstream of TLR4 was activated in 2,4,6-trinitrobenzene sulfate-induced colitis in the wild type but not in the TLR4-deficient mice. These results indicate that TLR4 may play a major role in regulation of TRPV1 signaling and peripheral hyperalgesia in inflammatory conditions.
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Affiliation(s)
- Yingwei Wu
- 1 Department of Anatomy and Physiology, Shanghai Jiaotong University School of Medicine, Shanghai, China.,2 Department of Radiology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Yingping Wang
- 1 Department of Anatomy and Physiology, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Juan Wang
- 1 Department of Anatomy and Physiology, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Qi Fan
- 2 Department of Radiology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Jinyu Zhu
- 2 Department of Radiology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Liu Yang
- 3 Core Laboratory, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Weifang Rong
- 1 Department of Anatomy and Physiology, Shanghai Jiaotong University School of Medicine, Shanghai, China
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524
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Xu Y, Xia M, Chen T, Yang Y, Fu G, Ji P, Wu Q. Inferior alveolar nerve transection disturbs innate immune responses and bone healing after tooth extraction. Ann N Y Acad Sci 2019; 1448:52-64. [PMID: 31095746 DOI: 10.1111/nyas.14120] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 03/14/2019] [Accepted: 04/24/2019] [Indexed: 12/15/2022]
Affiliation(s)
- Yamei Xu
- Stomatological Hospital of Chongqing Medical University, Chongqing Key Laboratory of Oral Diseases and Biomedical SciencesChongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education Chongqing China
| | - Mengnan Xia
- Stomatological Hospital of Chongqing Medical University, Chongqing Key Laboratory of Oral Diseases and Biomedical SciencesChongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education Chongqing China
| | - Tao Chen
- Stomatological Hospital of Chongqing Medical University, Chongqing Key Laboratory of Oral Diseases and Biomedical SciencesChongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education Chongqing China
| | - Yao Yang
- Stomatological Hospital of Chongqing Medical University, Chongqing Key Laboratory of Oral Diseases and Biomedical SciencesChongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education Chongqing China
| | - Gang Fu
- Stomatological Hospital of Chongqing Medical University, Chongqing Key Laboratory of Oral Diseases and Biomedical SciencesChongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education Chongqing China
| | - Ping Ji
- Stomatological Hospital of Chongqing Medical University, Chongqing Key Laboratory of Oral Diseases and Biomedical SciencesChongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education Chongqing China
| | - Qingqing Wu
- Stomatological Hospital of Chongqing Medical University, Chongqing Key Laboratory of Oral Diseases and Biomedical SciencesChongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education Chongqing China
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525
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Trier AM, Mack MR, Kim BS. The Neuroimmune Axis in Skin Sensation, Inflammation, and Immunity. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2019; 202:2829-2835. [PMID: 31061146 PMCID: PMC6563610 DOI: 10.4049/jimmunol.1801473] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 02/21/2019] [Indexed: 12/21/2022]
Abstract
Although connections between the immune and nervous systems have long been recognized, the precise mechanisms that underlie this relationship are just starting to be elucidated. Advances in sensory biology have unveiled novel mechanisms by which inflammatory cytokines promote itch and pain sensations to coordinate host-protective behavioral responses. Conversely, new evidence has emphasized the importance of immune cell regulation by sensory neurons. By focusing on itch biology and how it has been informed by the more established field of pain research, we highlight recent interdisciplinary studies that demonstrate how novel neuroimmune interactions underlie a diversity of sensory, inflammatory, and infectious diseases.
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Affiliation(s)
- Anna M Trier
- Center for the Study of Itch, Washington University School of Medicine, St. Louis, MO 63110
- Division of Dermatology, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110
| | - Madison R Mack
- Center for the Study of Itch, Washington University School of Medicine, St. Louis, MO 63110
- Division of Dermatology, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110
| | - Brian S Kim
- Center for the Study of Itch, Washington University School of Medicine, St. Louis, MO 63110;
- Division of Dermatology, Department of Medicine, Washington University School of Medicine, St. Louis, MO 63110
- Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO 63110; and
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110
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526
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Changes of plasma acetylcholine and inflammatory markers in critically ill patients during early enteral nutrition: A prospective observational study. J Crit Care 2019; 52:219-226. [PMID: 31108325 DOI: 10.1016/j.jcrc.2019.05.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 04/23/2019] [Accepted: 05/09/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND Acetylcholine (Ach) is the key anti-inflammatory transmitter in the cholinergic anti-inflammatory pathway. In this study, critically ill patients treated with early enteral nutrition (EEN) were observed to explore whether EEN affected Ach levels and inflammation. METHODS One hundred thirteen patients were included in this prospective observational study. All patients were provided the early enteral nutrition protocol 24-48 h after admission to the intensive care unit (ICU). Blood samples were collected, and the plasma levels of Ach, cholecystokinin (CCK), and inflammatory markers (tumour necrosis factor alpha (TNF-α), interleukin 1beta (IL1-β), and IL6) were measured on Days 0, 1, 3, 5, and 7. Nutritional intervention data were recorded within one week, including the number of patients receiving nutrition, the number of days nutrition was provided, the caloric intake and protein intake, feeding intolerance and prokinetic drug administration. Other collected data included the sequential organ failure assessment score (SOFA score), the Acute Physiology and Chronic Health Evaluation (APACHE) II score, the use of mechanical ventilation (the number of patients and the duration), use of vasoactive drugs and the number of renal replacement treatments (RRT) received by each patient during their ICU stay. The primary outcome was 28-day mortality. Additionally, we analysed the correlation between plasma Ach levels and inflammation, as well as the correlation between plasma Ach and CCK levels. Moreover, a multivariate regression analysis was performed to examine the independent effects of different variables on 28-day mortality and Ach levels. RESULTS The overall 28-day mortality was 28.3% (32/113). Eighty-two patients tolerated enteral nutrition. Compared with Day 0 15.6 (2.8) nmol/l, the plasma Ach level was significantly increased on Day 3 18.6 (6.7) nmol/l, Day 5 19.3 (6.2) nmol/l and Day 7 19.7 (4.3) nmol/l (p < .001). Compared with Day 0176.2 (50.4) pg/ml, the plasma TNF-α level was significantly decreased on Day 3144.0 (77.4) pg/ml, Day 5127.3 (51.8) pg/ml and Day 7111.4 (42.5) pg/ml (p < .05). Compared with Day 0, the plasma IL1-β level was significantly decreased on Day 7 (p < .05). The plasma IL6 level was significantly decreased on Day 5 and Day 7 (p < .05) compared with Day 0. Compared with Day 0, the plasma CCK level was significantly increased on Day 3, 5 and 7 (p < .001). The correlation analysis revealed negative correlations between Ach levels and inflammation (p < .001), and a positive correlation between CCK and Ach levels (r = 0.775, p < .001). A comparison of patients who did or did not tolerate EEN revealed significant differences in the plasma levels of Ach, TNF-α, IL6 and CCK (p < .05). Significant differences in plasma levels of Ach, TNF-α, IL1-β, IL6 and CCK were observed between 28-day survivors and non-survivors (p < .05). The multivariate logistic regression analysis identified vasopressor support, RRT, the administration of EEN, SOFA score, APACHE II score at ICU admission and plasma Ach levels as independent determinants of 28-day mortality. Additionally, the multivariate linear regression analysis identified EEN, plasma lactate, mechanical ventilation, the SOFA score and plasma CCK levels as independent determinants of plasma Ach levels. CONCLUSIONS The administration of EEN to critically ill patients contributed to the increased plasma Ach levels and decreased inflammatory markers. The effect of EEN on Ach levels is partially attributed to the increase in CCK levels. Elevated plasma Ach levels indicate a better prognosis. Clinical trials identifier: NCT03612206.
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527
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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] [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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528
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Lucido CT, Wynja E, Madeo M, Williamson CS, Schwartz LE, Imblum BA, Drapkin R, Vermeer PD. Innervation of cervical carcinoma is mediated by cancer-derived exosomes. Gynecol Oncol 2019; 154:228-235. [PMID: 31003747 DOI: 10.1016/j.ygyno.2019.04.651] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 04/05/2019] [Accepted: 04/08/2019] [Indexed: 02/07/2023]
Abstract
OBJECTIVE Recently, our laboratory identified sensory innervation within head and neck squamous cell carcinomas (HNSCCs) and subsequently defined a mechanism whereby HNSCCs promote their own innervation via the release of exosomes that stimulate neurite outgrowth. Interestingly, we noted that exosomes from human papillomavirus (HPV)-positive cell lines were more effective at promoting neurite outgrowth than those from HPV-negative cell lines. As nearly all cervical tumors are HPV-positive, we hypothesized that these findings would extend to cervical cancer. METHODS We use an in vitro assay with PC12 cells to quantify the axonogenic potential of cervical cancer exosomes. PC12 cells are treated with cancer-derived exosomes, stained with the pan-neuronal marker (β-III tubulin) and the number of neurites quantified. To assess innervation in cervical cancer, we immunohistochemically stained cervical cancer patient samples for β-III tubulin and TRPV1 (sensory marker) and compared the staining to normal cervix. RESULTS Here, we show the presence of sensory nerves within human cervical tumors. Additionally, we show that exosomes derived from HPV-positive cervical cancer cell lines effectively stimulate neurite outgrowth. CONCLUSIONS These data identify sensory nerves as components of the cervical cancer microenvironment and suggest that tumor- derived exosomes promote their recruitment.
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Affiliation(s)
- Christopher T Lucido
- Sanford Research, Cancer Biology and Immunotherapy Group, 2301 East 60th St north, Sioux Falls, SD 57104, USA; University of South Dakota Sanford School of Medicine, 414 E. Clark St, Vermillion, SD 57069, USA
| | - Emily Wynja
- Sanford Research, Cancer Biology and Immunotherapy Group, 2301 East 60th St north, Sioux Falls, SD 57104, USA; University of South Dakota Sanford School of Medicine, 414 E. Clark St, Vermillion, SD 57069, USA
| | - Marianna Madeo
- Sanford Research, Cancer Biology and Immunotherapy Group, 2301 East 60th St north, Sioux Falls, SD 57104, USA
| | - Caitlin S Williamson
- Sanford Research, Cancer Biology and Immunotherapy Group, 2301 East 60th St north, Sioux Falls, SD 57104, USA
| | - Lauren E Schwartz
- University of Pennsylvania, Perelman School of Medicine, Department of Pathology, 3400 Spruce St, Philadelphia, PA 19104, USA
| | - Brittney A Imblum
- University of Pennsylvania, Perelman School of Medicine, Department of Pathology, 3400 Spruce St, Philadelphia, PA 19104, USA
| | - Ronny Drapkin
- University of Pennsylvania, Perelman School of Medicine, Department of Pathology, 3400 Spruce St, Philadelphia, PA 19104, USA; Penn Ovarian Cancer Research Center, University of Pennsylvania, Perelman School of Medicine, 421 Curie Blvd, Philadelphia, PA 19104, USA
| | - Paola D Vermeer
- Sanford Research, Cancer Biology and Immunotherapy Group, 2301 East 60th St north, Sioux Falls, SD 57104, USA.
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Fattori V, Pinho-Ribeiro FA, Staurengo-Ferrari L, Borghi SM, Rossaneis AC, Casagrande R, Verri WA. The specialised pro-resolving lipid mediator maresin 1 reduces inflammatory pain with a long-lasting analgesic effect. Br J Pharmacol 2019; 176:1728-1744. [PMID: 30830967 DOI: 10.1111/bph.14647] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 01/30/2019] [Accepted: 02/11/2019] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND AND PURPOSE Maresin 1 (MaR1) is a specialised pro-resolving lipid mediator with anti-inflammatory and analgesic activities. In this study, we addressed the modulation of peripheral and spinal cord cells by MaR1 in the context of inflammatory pain. EXPERIMENTAL APPROACH Mice were treated with MaR1 before intraplantar injection of carrageenan or complete Freund's adjuvant (CFA). Mechanical hyperalgesia was assessed using the electronic von Frey and thermal hyperalgesia using a hot plate. Spinal cytokine production and NF-κB activation were determined by ELISA and astrocytes and microglia activation by RT-qPCR and immunofluorescence. CGRP release by dorsal root ganglia (DRG) neurons was determined by EIA. Neutrophil and macrophage recruitment were determined by immunofluorescence, flow cytometry, and colorimetric methods. Trpv1 and Nav1.8 expression and calcium imaging of DRG neurons were determined by RT-qPCR and Fluo-4AM respectively. KEY RESULTS MaR1 reduced carrageenan- and CFA-induced mechanical and thermal hyperalgesia and neutrophil and macrophage recruitment proximal to CGRP+ fibres in the paw skin. Moreover, MaR1 reduced NF-κB activation, IL-1β and TNF-α production, and spinal cord glial cells activation. In the DRG, MaR1 reduced CFA-induced Nav1.8 and Trpv1 mRNA expression and calcium influx and capsaicin-induced release of CGRP by DRG neurons. CONCLUSIONS AND IMPLICATIONS MaR1 reduced DRG neurons activation and CGRP release explaining, at least in part, its analgesic and anti-inflammatory effects. The enduring analgesic and anti-inflammatory effects and also post-treatment activity of MaR1 suggest that specialised pro-resolving lipid mediators have potential as a new class of drugs for the treatment of inflammatory pain.
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Affiliation(s)
- Victor Fattori
- Department of Pathology, Centre of Biological Sciences, Londrina State University, Londrina, Brazil
| | - Felipe A Pinho-Ribeiro
- Department of Pathology, Centre of Biological Sciences, Londrina State University, Londrina, Brazil
| | | | - Sergio M Borghi
- Department of Pathology, Centre of Biological Sciences, Londrina State University, Londrina, Brazil
| | - Ana C Rossaneis
- Department of Pathology, Centre of Biological Sciences, Londrina State University, Londrina, Brazil
| | - Rubia Casagrande
- Department of Pharmaceutical Sciences, Centre of Health Science, Londrina State University, Londrina, Brazil
| | - Waldiceu A Verri
- Department of Pathology, Centre of Biological Sciences, Londrina State University, Londrina, Brazil
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530
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Kerage D, Sloan EK, Mattarollo SR, McCombe PA. Interaction of neurotransmitters and neurochemicals with lymphocytes. J Neuroimmunol 2019; 332:99-111. [PMID: 30999218 DOI: 10.1016/j.jneuroim.2019.04.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 04/09/2019] [Accepted: 04/10/2019] [Indexed: 12/14/2022]
Abstract
Neurotransmitters and neurochemicals can act on lymphocytes by binding to receptors expressed by lymphocytes. This review describes lymphocyte expression of receptors for a selection of neurotransmitters and neurochemicals, the anatomical locations where lymphocytes can interact with neurotransmitters, and the effects of the neurotransmitters on lymphocyte function. Implications for health and disease are also discussed.
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Affiliation(s)
- Daniel Kerage
- The University of Queensland Diamantina Institute, Brisbane, Australia; Transplant Research Program, Boston Children's Hospital, Boston, MA, United States of America
| | - Erica K Sloan
- Drug Discovery Biology Theme, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia; Division of Surgery, Peter MacCallum Cancer Centre, Melbourne, VIC 3000, Australia; Cousins Center for Neuroimmunology, Semel Institute for Neuroscience and Human Behavior, University of California Los Angeles, USA
| | | | - Pamela A McCombe
- The University of Queensland Centre for Clinical Research, Royal Brisbane and Women's Hospital, Brisbane, Australia; Royal Brisbane and Women's Hospital, Herston, Brisbane, Australia.
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Repurposing of the Nootropic Drug Vinpocetine as an Analgesic and Anti-Inflammatory Agent: Evidence in a Mouse Model of Superoxide Anion-Triggered Inflammation. Mediators Inflamm 2019; 2019:6481812. [PMID: 31049025 PMCID: PMC6462340 DOI: 10.1155/2019/6481812] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 09/27/2018] [Accepted: 12/10/2018] [Indexed: 12/18/2022] Open
Abstract
Clinically active drugs for the treatment of acute pain have their prescription limited due to the significant side effects they induce. An increase in reactive oxygen species (ROS) has been linked to several conditions, including inflammation and pain processing. Therefore, new or repurposed drugs with the ability of reducing ROS-triggered responses are promising candidates for analgesic drugs. Vinpocetine is a clinically used nootropic drug with antioxidant, anti-inflammatory, and analgesic properties. However, the effects of vinpocetine have not been investigated in a model with a direct relationship between ROS, inflammation, and pain. Based on that, we aimed to investigate the effects of vinpocetine in a model of superoxide anion-induced pain and inflammation using potassium superoxide (KO2) as a superoxide anion donor to trigger inflammation and pain. In the KO2 model, vinpocetine dose-dependently reduced pain-like behaviors (spontaneous pain and hyperalgesia), paw edema, and neutrophil and mononuclear cell recruitment to the paw skin (assessed by H&E staining, fluorescence, and enzymatic assays) and to the peritoneal cavity. Vinpocetine also restored tissue endogenous antioxidant ability and Nrf2 and Ho-1 mRNA expression and reduced superoxide anion production and gp91phox mRNA expression. We also observed the inhibition of IκBα degradation by vinpocetine, which demonstrates a reduction in the activation of NF-κB explaining the diminished production of IL-33, IL-1β, and TNF-α. Collectively, our data show that vinpocetine alleviates pain and inflammation induced by KO2, which is a mouse model with a direct role of ROS in triggering pain and other inflammatory phenomena. Thus, the results suggest the repurposing of vinpocetine as an anti-inflammatory and analgesic drug.
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532
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Huang Y, Chen SR, Chen H, Pan HL. Endogenous transient receptor potential ankyrin 1 and vanilloid 1 activity potentiates glutamatergic input to spinal lamina I neurons in inflammatory pain. J Neurochem 2019; 149:381-398. [PMID: 30716174 DOI: 10.1111/jnc.14677] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 12/31/2018] [Accepted: 01/30/2019] [Indexed: 01/21/2023]
Abstract
Inflammatory pain is associated with peripheral and central sensitization, but the underlying synaptic plasticity at the spinal cord level is poorly understood. Transient receptor potential (TRP) channels expressed at peripheral nerve endings, including TRP subtypes ankyrin 1 (TRPA1) and vanilloid 1 (TRPV1), can detect nociceptive stimuli. In this study, we determined the contribution of presynaptic TRPA1 and TRPV1 at the spinal cord level to regulating nociceptive drive in chronic inflammatory pain induced by complete Freund's adjuvant (CFA) in rats. CFA treatment caused a large increase in the frequency of spontaneous excitatory postsynaptic currents (EPSCs) in lamina I, but not lamina II outer zone, dorsal horn neurons. However, blocking NMDA receptors had no effect on spontaneous EPSCs in lamina I neurons of CFA-treated rats. Application of a specific TRPA1 antagonist, AM-0902, or of a specific TRPV1 antagonist, 5'-iodoresiniferatoxin, significantly attenuated the elevated frequency of spontaneous EPSCs and miniature EPSCs, the amplitude of monosynaptic EPSCs evoked from the dorsal root in lamina I neurons of CFA-treated rats. AM-0902 and 5'-iodoresiniferatoxin had no effect on evoked or miniature EPSCs in lamina I neurons of vehicle-treated rats. In addition, intrathecal injection of AM-0902 or 5'-iodoresiniferatoxin significantly reduced pain hypersensitivity in CFA-treated rats but had no effect on acute nociception in vehicle-treated rats. Therefore, unlike neuropathic pain, chronic inflammatory pain is associated with NMDA receptor-independent potentiation in glutamatergic drive to spinal lamina I neurons. Endogenous presynaptic TRPA1 and TRPV1 activity at the spinal level contributes to increased nociceptive input from primary sensory nerves to dorsal horn neurons in inflammatory pain. OPEN SCIENCE BADGES: This article has received a badge for *Open Materials* because it provided all relevant information to reproduce the study in the manuscript. The complete Open Science Disclosure form for this article can be found at the end of the article. More information about the Open Practices badges can be found at https://cos.io/our-services/open-science-badges/.
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Affiliation(s)
- Yuying Huang
- Department of Anesthesiology and Perioperative Medicine, Center for Neuroscience and Pain Research, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Shao-Rui Chen
- Department of Anesthesiology and Perioperative Medicine, Center for Neuroscience and Pain Research, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Hong Chen
- Department of Anesthesiology and Perioperative Medicine, Center for Neuroscience and Pain Research, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Hui-Lin Pan
- Department of Anesthesiology and Perioperative Medicine, Center for Neuroscience and Pain Research, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
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533
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Antisense oligonucleotides selectively suppress target RNA in nociceptive neurons of the pain system and can ameliorate mechanical pain. Pain 2019; 159:139-149. [PMID: 28976422 DOI: 10.1097/j.pain.0000000000001074] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
There is an urgent need for better treatments for chronic pain, which affects more than 1 billion people worldwide. Antisense oligonucleotides (ASOs) have proven successful in treating children with spinal muscular atrophy, a severe infantile neurological disorder, and several ASOs are currently being tested in clinical trials for various neurological disorders. Here, we characterize the pharmacodynamic activity of ASOs in spinal cord and dorsal root ganglia (DRG), key tissues for pain signaling. We demonstrate that activity of ASOs lasts up to 2 months after a single intrathecal bolus dose. Interestingly, comparison of subcutaneous, intracerebroventricular, and intrathecal administration shows that DRGs are targetable by systemic and central delivery of ASOs, while target reduction in the spinal cord is achieved only after direct central delivery. Upon detailed characterization of ASO activity in individual cell populations in DRG, we observe robust target suppression in all neuronal populations, thereby establishing that ASOs are effective in the cell populations involved in pain propagation. Furthermore, we confirm that ASOs are selective and do not modulate basal pain sensation. We also demonstrate that ASOs targeting the sodium channel Nav1.7 induce sustained analgesia up to 4 weeks. Taken together, our findings support the idea that ASOs possess the required pharmacodynamic properties, along with a long duration of action beneficial for treating pain.
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534
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Karshikoff B, Tadros MA, Mackey S, Zouikr I. Neuroimmune modulation of pain across the developmental spectrum. Curr Opin Behav Sci 2019; 28:85-92. [PMID: 32190717 DOI: 10.1016/j.cobeha.2019.01.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Today's treatment for chronic pain is inadequate, and novel targets need to be identified. This requires a better understanding of the mechanisms involved in pain sensitization and chronification. In this review, we discuss how peripheral inflammation, as occurs during an infection, modulates the central pain system. In rodents, neonatal inflammation leads to increased pain sensitivity in adulthood by priming immune components both peripherally and centrally. The excitability of neurons in the spinal cord is also altered by neonatal inflammation and may add to pain sensitization later in life. In adult humans, inflammation modulates pain sensitivity as well, partly by affecting the activity in brain areas that process and regulate pain signals. Low-grade inflammation is common in clinical populations both peripherally and centrally, and priming of the immune system has also been suggested in some pain populations. The nociceptive and immune systems are primed by infections and inflammation. The early life programming of nociceptive responses following exposure to infections or inflammation will define individual differences in adult pain perception. Immune-to-brain mechanisms and neuroimmune pathway need further investigation as they may serve both as predictors and therapeutic targets in chronic pain.
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Affiliation(s)
- Bianka Karshikoff
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University, Palo Alto, USA.,Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Melissa Anne Tadros
- Faculty of Health and Hunter Medical Research Institute, School of Biomedical Sciences and Pharmacy, The University of Newcastle, Callaghan, NSW, Australia
| | - Sean Mackey
- Department of Anesthesiology, Perioperative and Pain Medicine, Stanford University, Palo Alto, USA
| | - Ihssane Zouikr
- School of Psychology, The University of Newcastle, Callaghan, NSW, Australia
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535
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Petrović J, Silva JR, Bannerman CA, Segal JP, Marshall AS, Haird CM, Gilron I, Ghasemlou N. γδ T Cells Modulate Myeloid Cell Recruitment but Not Pain During Peripheral Inflammation. Front Immunol 2019; 10:473. [PMID: 30936874 PMCID: PMC6431614 DOI: 10.3389/fimmu.2019.00473] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 02/21/2019] [Indexed: 12/12/2022] Open
Abstract
Circulating immune cells, which are recruited to the site of injury/disease, secrete various inflammatory mediators that are critical to nociception and pain. The role of tissue-resident immune cells, however, remains poorly characterized. One of the first cells to be activated in peripheral tissues following injury are γδT cells, which serve important roles in infection, disease, and wound healing. Using a mouse line lacking these cells, we sought to identify their contribution to inflammatory pain. Three distinct models of peripheral inflammatory pain were used: intraplantar injection of formalin (spontaneous inflammatory pain), incisional wound (acute inflammatory pain), and intraplantar injection of complete Freund's adjuvant (chronic inflammatory pain). Our results show that absence of γδT cells does not alter baseline sensitivity, nor does it result in changes to mechanical or thermal hypersensitivity after tissue injury. Myeloid cell recruitment did show differential changes between models of acute and chronic inflammatory pain. These results were consistent in both male and female mice, suggesting that there are no sex differences in these outcomes. This comprehensive characterization suggests that γδT cells do not contribute to basal sensitivity or the development and maintenance of inflammatory pain.
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Affiliation(s)
- Jelena Petrović
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - Jaqueline Raymondi Silva
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, ON, Canada
- Department of Anesthesiology & Perioperative Medicine, Queen's University, Kingston, ON, Canada
| | - Courtney A. Bannerman
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - Julia P. Segal
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - Abigail S. Marshall
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - Cortney M. Haird
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - Ian Gilron
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, ON, Canada
- Department of Anesthesiology & Perioperative Medicine, Queen's University, Kingston, ON, Canada
- Centre for Neuroscience Studies, Queen's University, Kingston, ON, Canada
| | - Nader Ghasemlou
- Department of Biomedical & Molecular Sciences, Queen's University, Kingston, ON, Canada
- Department of Anesthesiology & Perioperative Medicine, Queen's University, Kingston, ON, Canada
- Centre for Neuroscience Studies, Queen's University, Kingston, ON, Canada
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536
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Russo MA, Fiore NT, van Vreden C, Bailey D, Santarelli DM, McGuire HM, Fazekas de St Groth B, Austin PJ. Expansion and activation of distinct central memory T lymphocyte subsets in complex regional pain syndrome. J Neuroinflammation 2019; 16:63. [PMID: 30885223 PMCID: PMC6423749 DOI: 10.1186/s12974-019-1449-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 02/28/2019] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Complex regional pain syndrome (CRPS) is a debilitating condition where trauma to a limb results in devastating persistent pain that is disproportionate to the initial injury. The pathophysiology of CRPS remains unknown; however, accumulating evidence suggests it is an immunoneurological disorder, especially in light of evidence of auto-antibodies in ~ 30% of patients. Despite this, a systematic assessment of all circulating leukocyte populations in CRPS has never been performed. METHODS We characterised 14 participants as meeting the Budapest clinical criteria for CRPS and assessed their pain ratings and psychological state using a series of questionnaires. Next, we performed immunophenotyping on blood samples from the 14 CRPS participants as well as 14 healthy pain-free controls using mass cytometry. Using a panel of 38 phenotypic and activation markers, we characterised the numbers and intracellular activation status of all major leukocyte populations using manual gating strategies and unsupervised cluster analysis. RESULTS We have shown expansion and activation of several distinct populations of central memory T lymphocytes in CRPS. The number of central memory CD8+ T cells was increased 2.15-fold; furthermore, this cell group had increased phosphorylation of NFkB and STAT1 compared to controls. Regarding central memory CD4+ T lymphocytes, the number of Th1 and Treg cells was increased 4.98-fold and 2.18-fold respectively, with increased phosphorylation of NFkB in both populations. We also found decreased numbers of CD1c+ myeloid dendritic cells, although with increased p38 phosphorylation. These changes could indicate dendritic cell tissue trafficking, as well as their involvement in lymphocyte activation. CONCLUSIONS These findings represent the first mass cytometry immunophenotyping study in any chronic pain state and provide preliminary evidence of an antigen-mediated T lymphocyte response in CRPS. In particular, the presence of increased numbers of long-lived central memory CD4+ and CD8+ T lymphocytes with increased activation of pro-inflammatory signalling pathways may indicate ongoing inflammation and cellular damage in CRPS.
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Affiliation(s)
- Marc A. Russo
- Hunter Pain Clinic, 91 Chatham Street, Broadmeadow, NSW 2292 Australia
- Genesis Research Services, 220 Denison St, Broadmeadow, NSW 2292 Australia
| | - Nathan T. Fiore
- Discipline of Anatomy & Histology, School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Room E513, Anderson Stuart Building, Sydney, NSW 2006 Australia
| | - Caryn van Vreden
- Ramaciotti Centre for Human Systems Biology, Charles Perkins Centre, The University of Sydney, Sydney, NSW 2006 Australia
- Sydney Cytometry, Centenary Institute and the Charles Perkins Centre, John Hopkins Drive, Camperdown, NSW 2050 Australia
| | - Dominic Bailey
- Genesis Research Services, 220 Denison St, Broadmeadow, NSW 2292 Australia
| | | | - Helen M. McGuire
- Ramaciotti Centre for Human Systems Biology, Charles Perkins Centre, The University of Sydney, Sydney, NSW 2006 Australia
- Discipline of Pathology, School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006 Australia
| | - Barbara Fazekas de St Groth
- Ramaciotti Centre for Human Systems Biology, Charles Perkins Centre, The University of Sydney, Sydney, NSW 2006 Australia
- Discipline of Pathology, School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2006 Australia
| | - Paul J. Austin
- Discipline of Anatomy & Histology, School of Medical Sciences, Faculty of Medicine and Health, The University of Sydney, Room E513, Anderson Stuart Building, Sydney, NSW 2006 Australia
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Abstract
The neuronal and immune systems exhibit bidirectional interactions that play a critical role in tissue homeostasis, infection, and inflammation. Neuron-derived neuropeptides and neurotransmitters regulate immune cell functions, whereas inflammatory mediators produced by immune cells enhance neuronal activation. In recent years, accumulating evidence suggests that peripheral neurons and immune cells are colocalized and affect each other in local tissues. A variety of cytokines, inflammatory mediators, neuropeptides, and neurotransmitters appear to facilitate this crosstalk and positive-feedback loops between multiple types of immune cells and the central, peripheral, sympathetic, parasympathetic, and enteric nervous systems. In this Review, we discuss these recent findings regarding neuro-immune crosstalk that are uncovering molecular mechanisms that regulate inflammation. Finally, neuro-immune crosstalk has a key role in the pathophysiology of allergic diseases, and we present evidence indicating that neuro-immune interactions regulate asthma pathophysiology through both direct and indirect mechanisms.
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538
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Bordachar D. Lateral epicondylalgia: A primary nervous system disorder. Med Hypotheses 2019; 123:101-109. [PMID: 30696578 DOI: 10.1016/j.mehy.2019.01.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 12/28/2018] [Accepted: 01/10/2019] [Indexed: 01/05/2023]
Abstract
Lateral epicondylalgia (LE) is the most common chronic painful condition affecting the elbow in the general population. Although major advances have been accomplished in recent years in the understanding of LE, the underlying physiopathology is still a reason for debate. Differences in clinical presentation and evolution of the symptoms among patients, suggest the need for revisiting the current knowledge about subjacent mechanisms that attempt to explain pain and functional loss. Previous models have suggested that the condition is mainly a degenerative tendinopathy, associated with changes in pain pathways and the motor system. The hypothesis of this work is that LE is the clinical manifestation of a primary nervous system disorder, characterized by an abnormal increase in neuronal activity and a subsequent loss of homeostasis, which secondarily affects the musculoskeletal tissues of the elbow-forearm-hand complex. A new model for LE is presented, supported by an in-deep analysis of basic sciences, epidemiological and clinical studies.
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Affiliation(s)
- Diego Bordachar
- Instituto Universitario del Gran Rosario (IUGR), Centro Universitario de Asistencia, Docencia e Investigación (CUADI), Unidad de Investigación Musculoesquelética (UIM), Argentina.
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539
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Essential roles of C-type lectin Mincle in induction of neuropathic pain in mice. Sci Rep 2019; 9:872. [PMID: 30696945 PMCID: PMC6351622 DOI: 10.1038/s41598-018-37318-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 12/05/2018] [Indexed: 11/09/2022] Open
Abstract
Increasing evidence indicates that pattern recognition receptors (PRRs) are involved in neuropathic pain after peripheral nerve injury (PNI). While a significant number of studies support an association between neuropathic pain and the innate immune response mediated through Toll-like receptors, a family of PRRs, the roles of other types of PRRs are largely unknown. In this study, we have focused on the macrophage-inducible C-type lectin (Mincle), a PRR allocated to the C-type lectin receptor family. Here, we show that Mincle is involved in neuropathic pain after PNI. Mincle-deficient mice showed impaired PNI-induced mechanical allodynia. After PNI, expression of Mincle mRNA was rapidly increased in the injured spinal nerve. Most Mincle-expressing cells were identified as infiltrating leucocytes, although the migration of leucocytes was also observed in Mincle-deficient mice. Furthermore, Mincle-deficiency affected the induction of genes, which are reported to contribute to neuropathic pain after PNI in the dorsal root ganglia and spinal dorsal horn. These results suggest that Mincle is involved in triggering sequential processes that lead to the pathogenesis of neuropathic pain.
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540
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Chen H, Hu B, Lv X, Zhu S, Zhen G, Wan M, Jain A, Gao B, Chai Y, Yang M, Wang X, Deng R, Wang L, Cao Y, Ni S, Liu S, Yuan W, Chen H, Dong X, Guan Y, Yang H, Cao X. Prostaglandin E2 mediates sensory nerve regulation of bone homeostasis. Nat Commun 2019; 10:181. [PMID: 30643142 PMCID: PMC6331599 DOI: 10.1038/s41467-018-08097-7] [Citation(s) in RCA: 143] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Accepted: 12/14/2018] [Indexed: 12/15/2022] Open
Abstract
Whether sensory nerve can sense bone density or metabolic activity to control bone homeostasis is unknown. Here we found prostaglandin E2 (PGE2) secreted by osteoblastic cells activates PGE2 receptor 4 (EP4) in sensory nerves to regulate bone formation by inhibiting sympathetic activity through the central nervous system. PGE2 secreted by osteoblasts increases when bone density decreases as demonstrated in osteoporotic animal models. Ablation of sensory nerves erodes the skeletal integrity. Specifically, knockout of the EP4 gene in the sensory nerves or cyclooxygenase-2 (COX2) in the osteoblastic cells significantly reduces bone volume in adult mice. Sympathetic tone is increased in sensory denervation models, and propranolol, a β2-adrenergic antagonist, rescues bone loss. Furthermore, injection of SW033291, a small molecule to increase PGE2 level locally, significantly boostes bone formation, whereas the effect is obstructed in EP4 knockout mice. Thus, we show that PGE2 mediates sensory nerve to control bone homeostasis and promote regeneration.
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Affiliation(s)
- Hao Chen
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, 21205, USA
- Department of Orthopaedic Surgery, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, 215000, P. R. China
| | - Bo Hu
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, 21205, USA
- Section of Spine Surgery, Department of Orthopaedics, Changzheng Hospital, Second Military Medical University, Shanghai, 200433, P. R. China
| | - Xiao Lv
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Shouan Zhu
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Gehua Zhen
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Mei Wan
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Amit Jain
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Bo Gao
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Yu Chai
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Mi Yang
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Xiao Wang
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Ruoxian Deng
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Lei Wang
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Yong Cao
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Shuangfei Ni
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Shen Liu
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, 21205, USA
| | - Wen Yuan
- Section of Spine Surgery, Department of Orthopaedics, Changzheng Hospital, Second Military Medical University, Shanghai, 200433, P. R. China
| | - Huajiang Chen
- Section of Spine Surgery, Department of Orthopaedics, Changzheng Hospital, Second Military Medical University, Shanghai, 200433, P. R. China
| | - Xinzhong Dong
- Howard Hughes Medical Institute and The Solomon H. Snyder Department of Neuroscience, Center for Sensory Biology, The Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Yun Guan
- Department of Anesthesiology and Critical Care Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Huilin Yang
- Department of Orthopaedic Surgery, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, 215000, P. R. China.
| | - Xu Cao
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, 21205, USA.
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541
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Staurengo-Ferrari L, Badaro-Garcia S, Hohmann MSN, Manchope MF, Zaninelli TH, Casagrande R, Verri WA. Contribution of Nrf2 Modulation to the Mechanism of Action of Analgesic and Anti-inflammatory Drugs in Pre-clinical and Clinical Stages. Front Pharmacol 2019; 9:1536. [PMID: 30687097 PMCID: PMC6337248 DOI: 10.3389/fphar.2018.01536] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 12/17/2018] [Indexed: 12/12/2022] Open
Abstract
Despite the progress that has occurred in recent years in the development of therapies to treat painful and inflammatory diseases, there is still a need for effective and potent analgesics and anti-inflammatory drugs. It has long been known that several types of antioxidants also possess analgesic and anti-inflammatory properties, indicating a strong relationship between inflammation and oxidative stress. Understanding the underlying mechanisms of action of anti-inflammatory and analgesic drugs, as well as essential targets in disease physiopathology, is essential to the development of novel therapeutic strategies. The Nuclear factor-2 erythroid related factor-2 (Nrf2) is a transcription factor that regulates cellular redox status through endogenous antioxidant systems with simultaneous anti-inflammatory activity. This review summarizes the molecular mechanisms and pharmacological actions screened that link analgesic, anti-inflammatory, natural products, and other therapies to Nrf2 as a regulatory system based on emerging evidences from experimental disease models and new clinical trial data.
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Affiliation(s)
- Larissa Staurengo-Ferrari
- Departamento de Patologia, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Stephanie Badaro-Garcia
- Departamento de Patologia, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Miriam S. N. Hohmann
- Departamento de Patologia, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Marília F. Manchope
- Departamento de Patologia, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Tiago H. Zaninelli
- Departamento de Patologia, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, Brazil
| | - Rubia Casagrande
- Departamento de Ciências Farmacêuticas, Centro de Ciências da Saúde, Universidade Estadual de Londrina, Londrina, Brazil
| | - Waldiceu A. Verri
- Departamento de Patologia, Centro de Ciências Biológicas, Universidade Estadual de Londrina, Londrina, Brazil
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542
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Skin-Resident γδ T Cells Exhibit Site-Specific Morphology and Activation States. J Immunol Res 2019; 2019:9020234. [PMID: 30723751 PMCID: PMC6339708 DOI: 10.1155/2019/9020234] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 10/28/2018] [Accepted: 11/14/2018] [Indexed: 11/24/2022] Open
Abstract
Skin-resident γδ T cells play an important role in maintaining the immune barrier at the epithelial surface. Their roles in wound healing, regulation of immune response to injury, and reepithelialization have been characterized extensively in the mouse, though their function in human skin remains largely unknown. Human skin-resident γδ T cells sparsely populate the skin and are often small and rounded in appearance. Those in the mouse ear and back, which line the dermal barrier, are highly arborized cells with many processes extending from the cell body. To date, these cells have been studied primarily in the mouse ear and back; however, it is important to further identify and characterize γδ T cells in other body sites to better understand their function and study their contribution to injury and disease. We developed a novel method to visualize these cells in the skin (whole-mount and cryosections) that when combined with flow cytometry allowed us to assess differences in skin-resident γδ T cell numbers, morphology, and activation state in the ear, back, and footpad (chosen for their importance in immunological and pain research). In comparing cell length, number of dendritic processes, and expression of the activation marker CD69, we found that γδ T cell morphology and activation states vary significantly among the three tissue environments. Specifically, γδ T cells in the footpad are smaller, have fewer processes, and show the highest levels of activation compared to back- and ear-resident cells. Our observations suggest that our understanding of skin-resident γδ T cell functionality, drawn from the experiments performed in the ear and back tissue, may not be applicable to all skin environments. The footpad-resident cells also more closely resemble γδ T cells in human skin, suggesting that cells in this tissue environment may serve as a better translational model when studying γδ T cell function/activity.
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543
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Liu CH, Lan CT, Chen LY, Liao WC, Ko MH, Tseng TJ. Phosphorylation of extracellular signal-regulated kinase 1/2 in subepidermal nerve fibers mediates hyperalgesia following diabetic peripheral neuropathy. Neurotoxicology 2018; 71:60-74. [PMID: 30583000 DOI: 10.1016/j.neuro.2018.12.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 12/18/2018] [Accepted: 12/21/2018] [Indexed: 11/28/2022]
Abstract
Peripheral neuropathy, a chronic complication of diabetes mellitus (DM), is often accompanied by the onset of severe pain symptoms that affect quality of life. However, the underlying mechanisms remain elusive. In the present study, we used Sprague-Dawley rats to establish a rodent model of the human type 1 DM by a single intraperitoneal (i.p.) injection with streptozotocin (STZ) (60 mg/kg). Hypersensitivity, including hyperalgesia and allodynia, developed in the STZ-induced diabetic rats. Cutaneous innervation exhibited STZ-induced reductions of protein gene product 9.5-, peripherin-, and neurofilament 200-immunoreactivity (IR) subepidermal nerve fibers (SENFs). Moreover, the decreases of substance P (SP)- and calcitonin gene-related peptide (CGRP)-IR SENFs were distinct gathered from the results of extracellular signal-regulated kinase 1 and 2 (ERK1/2)- and phosphorylated ERK1/2 (pERK1/2)-IR SENFs in STZ-induced diabetic rats. Double immunofluorescence studies demonstrated that STZ-induced pERK1/2-IR was largely increased in SENFs where only a small portion was colocalized with SP- or CGRP-IR. By an intraplantar (i. pl.) injection with a MEK inhibitor, U0126 (1,4-Diamino-2,3-dicyano-1,4-bis[2-aminophenylthio]butadiene), hyperalgesia was attenuated in a dose-responsive manner. Botulinum toxin serotype A had dose-dependent analgesic effects on STZ-induced hyperalgesia and allodynia, which exhibited equivalent results as the efficacy of transient receptor potential vanilloid (TRPV) channel antagonists. Morphological evidence further confirmed that STZ-induced SP-, CGRP- and pERK1/2-IR were reduced in SENFs after pharmacological interventions. From the results obtained in this study, it is suggested that increases of pERK1/2 in SENFs may participate in the modulation of TRPV channel-mediated neurogenic inflammation that triggers hyperalgesia in STZ-induced diabetic rats. Therefore, ERK1/2 provides a potential therapeutic target and efficient pharmacological strategies to address hyperglycemia-induced neurotoxicity.
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Affiliation(s)
- Chiung-Hui Liu
- Department of Anatomy, Institute of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan; Department of Medical Education, Chung Shan Medical University Hospital, Taichung 40201, Taiwan
| | - Chyn-Tair Lan
- Department of Anatomy, Institute of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan; Department of Medical Education, Chung Shan Medical University Hospital, Taichung 40201, Taiwan
| | - Li-You Chen
- Department of Anatomy, Institute of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan; Department of Medical Education, Chung Shan Medical University Hospital, Taichung 40201, Taiwan
| | - Wen-Chieh Liao
- Department of Anatomy, Institute of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan; Department of Medical Education, Chung Shan Medical University Hospital, Taichung 40201, Taiwan
| | - Miau-Hwa Ko
- Department of Anatomy, College of Medicine, China Medical University, Taichung 40402, Taiwan
| | - To-Jung Tseng
- Department of Anatomy, Institute of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan; Department of Medical Education, Chung Shan Medical University Hospital, Taichung 40201, Taiwan.
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544
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Conti P, D'Ovidio C, Conti C, Gallenga CE, Lauritano D, Caraffa A, Kritas SK, Ronconi G. Progression in migraine: Role of mast cells and pro-inflammatory and anti-inflammatory cytokines. Eur J Pharmacol 2018; 844:87-94. [PMID: 30529470 DOI: 10.1016/j.ejphar.2018.12.004] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 12/04/2018] [Accepted: 12/05/2018] [Indexed: 02/08/2023]
Abstract
Migraine is a common painful neurovascular disorder usually associated with several symptoms, such as photophobia, phonophobia, nausea, vomiting and inflammation, and involves immune cells. Mast cells (MCs) are immune cells derived from hematopoietic pluripotent stem cells which migrate and mature close to epithelial, blood vessels, and nerves. In almost all vascularized tissues there are MCs that produce, contain and release biologically active products including cytokines, arachidonic acid compounds, and proteases. In addition, MCs participate in innate and adaptive immune responses. Innate responses in the central nervous system (CNS) occur during neuroinflammatory phenomena, including migraine. Antigens found in the environment have a crucial role in inflammatory response, causing a broad range of diseases including migraine. They can be recognized by several innate immune cells, such as macrophages, microglia, dendritic cells and MCs, which can be activated trough Toll-like receptor (TLR) signaling. MCs reside close to primary nociceptive neurons, associate with nerves, and are capable of triggering local inflammation. MCs are involved in the pathophysiology of various tissues and organs, especially where there is an increase of angiogenesis. Activated MCs release preformed mediators include histamine, heparin, proteases (tryptase, chimase), hydrolases, cathepsin, carboxypeptidases, and peroxidase, and they also generate pro-inflammatory cytokines/chemokines. In addition, activated macrophages, microglia and MCs in the CNS release pro-inflammatory cytokines which provoke an increase of arachidonic acid product levels and lead to migraine and other neurological manifestations including fatigue, nausea, headaches and brain fog. Innate immunity and pro-inflammatory interleukin (IL)-1 cytokine family members can be inhibited by IL-37, a relatively new member of the IL-1 family. In this article, we report that some pro-inflammatory cytokines inducing migraine may be inhibited by IL-37, a natural suppressor of inflammation, and innate and acquired immunity.
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Affiliation(s)
- Pio Conti
- Immunology Division, Postgraduate Medical School, University of Chieti-Pescara, Chieti, Italy.
| | - Cristian D'Ovidio
- Section of Legal Medicine, Department of Medicine and Aging Sciences, "G. d'Annunzio" University of Chieti-Pescara, Italy.
| | - Chiara Conti
- Department of Psychological, Health, and Territorial Sciences, University "G. d'Annunzio" of Chieti-Pescara, Chieti, Italy.
| | - Carla Enrica Gallenga
- Department of Biomedical Sciences and Specialist Surgery, Section of Ophthalmology, University of Ferrara, Italy.
| | - Dorina Lauritano
- University of Milan-Bicocca, Medicine and Surgery Department, Centre of Neuroscience of Milan, Italy.
| | | | - Spiros K Kritas
- Department of Microbiology and Infectious Diseases, Aristotle University of Thessaloniki, Macedonia, Greece.
| | - Gianpaolo Ronconi
- UOS Clinica dei Pazienti del Territorio, Policlinico Gemelli, Rome, Italy.
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545
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Majima M, Ito Y, Hosono K, Amano H. CGRP/CGRP Receptor Antibodies: Potential Adverse Effects Due to Blockade of Neovascularization? Trends Pharmacol Sci 2018; 40:11-21. [PMID: 30502971 DOI: 10.1016/j.tips.2018.11.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 11/01/2018] [Accepted: 11/06/2018] [Indexed: 01/23/2023]
Abstract
Migraine is a severe neurological disorder in which calcitonin gene-related peptide (CGRP) is a key molecule in pathophysiology. Neuronal system-derived CGRP enhances neovascularization in several important pathological conditions and sends a cue to the vascular system. In 2018, the FDA approved erenumab and fremanezumab, antibodies against CGRP receptor and CGRP, as the first new class of drugs for migraine. Treatment of migraine with these antibodies requires great care because neovascularization-related adverse effects may be induced in some patients. Here, we focus on enhancement of neovascularization by CGRP and discuss possible adverse effects resulting from blocking neovascularization. We also suggest that CGRP antibodies may also be used as novel antitumor agents by suppressing tumor-associated angiogenesis.
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MESH Headings
- Angiogenesis Inhibitors/administration & dosage
- Angiogenesis Inhibitors/adverse effects
- Angiogenesis Inhibitors/pharmacology
- Animals
- Antibodies, Monoclonal/administration & dosage
- Antibodies, Monoclonal/adverse effects
- Antibodies, Monoclonal/pharmacology
- Antibodies, Monoclonal, Humanized/administration & dosage
- Antibodies, Monoclonal, Humanized/adverse effects
- Antibodies, Monoclonal, Humanized/pharmacology
- Calcitonin Gene-Related Peptide/immunology
- Calcitonin Gene-Related Peptide/metabolism
- Humans
- Migraine Disorders/drug therapy
- Migraine Disorders/immunology
- Neoplasms/blood supply
- Neoplasms/drug therapy
- Neovascularization, Pathologic/drug therapy
- Neovascularization, Pathologic/pathology
- Receptors, Calcitonin Gene-Related Peptide/immunology
- Receptors, Calcitonin Gene-Related Peptide/metabolism
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Affiliation(s)
- Masataka Majima
- Department of Pharmacology, Kitasato University School of Medicine and Department of Molecular Pharmacology, Kitasato University Graduate School of Medical Sciences, Sagamihara, Kanagawa 252-0374, Japan.
| | - Yoshiya Ito
- Department of Pharmacology, Kitasato University School of Medicine and Department of Molecular Pharmacology, Kitasato University Graduate School of Medical Sciences, Sagamihara, Kanagawa 252-0374, Japan
| | - Kanako Hosono
- Department of Pharmacology, Kitasato University School of Medicine and Department of Molecular Pharmacology, Kitasato University Graduate School of Medical Sciences, Sagamihara, Kanagawa 252-0374, Japan
| | - Hideki Amano
- Department of Pharmacology, Kitasato University School of Medicine and Department of Molecular Pharmacology, Kitasato University Graduate School of Medical Sciences, Sagamihara, Kanagawa 252-0374, Japan
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546
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Role of C1 neurons in anti-inflammatory reflex: Mediation between afferents and efferents. Neurosci Res 2018; 136:6-12. [DOI: 10.1016/j.neures.2018.05.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 04/24/2018] [Accepted: 05/07/2018] [Indexed: 12/21/2022]
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547
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Abstract
PURPOSE OF REVIEW Pain in rheumatoid arthritis (RA) may be due to different etiologies, ranging from peripheral inflammation to dysregulation of central nervous system (CNS) processing. This review evaluates relevant literature published on RA pain mechanisms in recent years. RECENT FINDINGS Despite successes of disease-modifying antirheumatic drugs (DMARDs), pain persists for many RA patients. Studies involving patient-reported outcomes, quantitative sensory testing, and neuroimaging indicate that, in addition to joint inflammation, abnormalities in CNS pain processing may contribute to pain. Some DMARDs (e.g., janus kinus inhibitors) may work via multiple pathways to decrease pain. Adjunctive treatments (e.g., antidepressants, antiepileptics) may also be useful in managing pain in RA patients with well-controlled disease. Both peripheral and central mechanisms play key roles in the expression of pain in RA. To effectively manage pain, physicians need accurate assessment tools to identify the pathways involved in each patient so that treatments may be appropriately targeted.
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Affiliation(s)
- Angela Zhang
- Commonwealth Honors College University of Massachusetts Amherst, Amherst, MA, 01003, USA
| | - Yvonne C Lee
- Division of Rheumatology, Northwestern University Feinberg School of Medicine, Chicago, IL, 60611, USA.
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548
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Kern K, Schäfer SMG, Cohnen J, Pierre S, Osthues T, Tarighi N, Hohmann S, Ferreiros N, Brüne B, Weigert A, Geisslinger G, Sisignano M, Scholich K. The G2A Receptor Controls Polarization of Macrophage by Determining Their Localization Within the Inflamed Tissue. Front Immunol 2018; 9:2261. [PMID: 30327654 PMCID: PMC6174245 DOI: 10.3389/fimmu.2018.02261] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 09/11/2018] [Indexed: 12/17/2022] Open
Abstract
Macrophages are highly versatile cells, which acquire, depending on their microenvironment, pro- (M1-like), or antiinflammatory (M2-like) phenotypes. Here, we studied the role of the G-protein coupled receptor G2A (GPR132), in chemotactic migration and polarization of macrophages, using the zymosan-model of acute inflammation. G2A-deficient mice showed a reduced zymosan-induced thermal hyperalgesia, which was reversed after macrophage depletion. Fittingly, the number of M1-like macrophages was reduced in the inflamed tissue in G2A-deficient mice. However, G2A activation was not sufficient to promote M1-polarization in bone marrow-derived macrophages. While the number of monocyte-derived macrophages in the inflamed paw was not altered, G2A-deficient mice had less macrophages in the direct vicinity of the origin of inflammation, an area marked by the presence of zymosan, neutrophil accumulation and proinflammatory cytokines. Fittingly neutrophil efferocytosis was decreased in G2A-deficient mice and several lipids, which are released by neutrophils and promote G2A-mediated chemotaxis, were increased in the inflamed tissue. Taken together, G2A is necessary to position macrophages in the proinflammatory microenvironment surrounding the center of inflammation. In absence of G2A the macrophages are localized in an antiinflammatory microenvironment and macrophage polarization is shifted toward M2-like macrophages.
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Affiliation(s)
- Katharina Kern
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany
| | - Stephan M G Schäfer
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany
| | - Jennifer Cohnen
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany
| | - Sandra Pierre
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany
| | - Tabea Osthues
- Project Group Translational Medicine and Pharmacology, Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Frankfurt, Germany
| | - Neda Tarighi
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany
| | - Stefan Hohmann
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany
| | - Nerea Ferreiros
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany
| | - Bernhard Brüne
- Project Group Translational Medicine and Pharmacology, Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Frankfurt, Germany.,Faculty of Medicine, Institute of Biochemistry I, Goethe-University Frankfurt, Frankfurt, Germany
| | - Andreas Weigert
- Faculty of Medicine, Institute of Biochemistry I, Goethe-University Frankfurt, Frankfurt, Germany
| | - Gerd Geisslinger
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany.,Project Group Translational Medicine and Pharmacology, Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Frankfurt, Germany
| | - Marco Sisignano
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany
| | - Klaus Scholich
- Institute of Clinical Pharmacology, Pharmazentrum Frankfurt, University Hospital Frankfurt, Frankfurt, Germany.,Project Group Translational Medicine and Pharmacology, Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Frankfurt, Germany
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549
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Couve E, Schmachtenberg O. Schwann Cell Responses and Plasticity in Different Dental Pulp Scenarios. Front Cell Neurosci 2018; 12:299. [PMID: 30233330 PMCID: PMC6133954 DOI: 10.3389/fncel.2018.00299] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Accepted: 08/17/2018] [Indexed: 12/29/2022] Open
Abstract
Mammalian teeth have evolved as dentin units that enclose a complex system of sensory innervation to protect and preserve their structure and function. In human dental pulp (DP), mechanosensory and nociceptive fibers form a dense meshwork of nerve endings at the coronal dentin-pulp interface, which arise from myelinated and non-myelinated axons of the Raschkow plexus (RP). Schwann cells (SCs) play a crucial role in the support, maintenance and regeneration after injury of these fibers. We have recently characterized two SC phenotypes hierarchically organized within the coronal and radicular DP in human teeth. Myelinating and non-myelinating SCs (nmSCs) display a high degree of plasticity associated with nociceptive C-fiber sprouting and axonal degeneration in response to DP injuries from dentin caries or physiological root resorption (PRR). By comparative immunolabeling, confocal and electron microscopy, we have characterized short-term adaptive responses of SC phenotypes to nerve injuries, and long-term changes related to aging. An increase of SCs characterizes the early responses to caries progression in association with axonal sprouting in affected DP domains. Moreover, during PRR, the formation of bands of Büngner is observed as part of SC repair tracks functions. On the other hand, myelinated axon density is significantly reduced with tooth age, as part of a gradual decrease in DP defense and repair capacities. The remarkable plasticity and capacity of SCs to preserve DP innervation in different dental scenarios constitutes a fundamental aspect to improve clinical treatments. This review article discusses the central role of myelinating and non-mSCs in long-term tooth preservation and homeostasis.
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Affiliation(s)
- Eduardo Couve
- Laboratorio de Microscopía Electrónica, Instituto de Biología, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso, Chile
| | - Oliver Schmachtenberg
- Centro Interdisciplinario de Neurociencias de Valparaíso (CINV), Facultad de Ciencias, Universidad de Valparaíso, Valparaíso, Chile
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Abstract
Persistent pain is common in elite athletes. The current review arose from a consensus initiative by the International Olympic Committee to advance the development of a standardized, scientific, and evidence-informed approach to management. We suggest that optimal management of persistent pain in elite athletes requires an understanding of contemporary pain science, including the rationale behind and implementation of a biopsychosocial approach to care. We argue that athletes and clinicians need to understand the biopsychosocial model because it applies to both pain and the impact of pain with special reference to the sport setting. Management relies on thorough and precise assessment that considers contributing factors across nociceptive, inflammatory, neuropathic, and centrally acting domains; these can include contextual and psychosocial factors. Pain management seeks to remove contributing factors wherever possible through targeted education; adjustment of mechanical loading, training, and performance schedules; psychological therapies; and management of inflammation.
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