1
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Gonzatti MB, Freire BM, Antunes MM, de Menezes GB, Talbot J, Peron JPS, Basso AS, Keller AC. Targeting adrenergic receptors to mitigate invariant natural killer T cells-induced acute liver injury. iScience 2023; 26:107947. [PMID: 37841583 PMCID: PMC10568435 DOI: 10.1016/j.isci.2023.107947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 08/07/2023] [Accepted: 09/13/2023] [Indexed: 10/17/2023] Open
Abstract
Invariant Natural Killer T (iNKT) cell activation by α-galactosylceramide (αGC) potentiates cytotoxic immune responses against tumors. However, αGC-induced liver injury is a limiting factor for iNKT-based immunotherapy. Although adrenergic receptor stimulation is an important immunosuppressive signal that curbs tissue damage induced by inflammation, its effect on the antitumor activity of invariant Natural Killer T (iNKT) cells remains unclear. We use mouse models and pharmacological tools to show that the stimulation of the sympathetic nervous system (SNS) inhibits αGC-induced liver injury without impairing iNKT cells' antitumoral functions. Mechanistically, SNS stimulation prevents the collateral effect of TNF-α production by iNKT cells and neutrophil accumulation in hepatic parenchyma. Our results suggest that the modulation of the adrenergic signaling can be a complementary approach to αGC-based immunotherapy to mitigate iNKT-induced liver injury without compromising its antitumoral activity.
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Affiliation(s)
- Michelangelo Bauwelz Gonzatti
- Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo (UNIFESP/EPM), Rua Botucatu, 862, 4th floor, São Paulo 04023-062, Brazil
| | - Beatriz Marton Freire
- Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo (UNIFESP/EPM), Rua Botucatu, 862, 4th floor, São Paulo 04023-062, Brazil
| | - Maísa Mota Antunes
- Department of Morphology, Federal University of Minas Gerais, Av. Antônio Carlos, 6627, Minas Gerais 31270-910, Brazil
| | - Gustavo Batista de Menezes
- Department of Morphology, Federal University of Minas Gerais, Av. Antônio Carlos, 6627, Minas Gerais 31270-910, Brazil
| | - Jhimmy Talbot
- Fred Hutchinson Cancer Center, 1100 Fairview Avenue N, Seattle, WA 98109-1024, USA
| | - Jean Pierre Schatzmann Peron
- Department of Immunology-ICB IV, University of São Paulo, Av. Prof. Lineu Prestes, 1730, São Paulo 05508-900, Brazil
| | - Alexandre Salgado Basso
- Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo (UNIFESP/EPM), Rua Botucatu, 862, 4th floor, São Paulo 04023-062, Brazil
| | - Alexandre Castro Keller
- Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo (UNIFESP/EPM), Rua Botucatu, 862, 4th floor, São Paulo 04023-062, Brazil
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2
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Barrow S, Talbot J, Kindelan S, Walker E. The role of CBCT in paediatric dentoalveolar trauma: A service evaluation. Int J Paediatr Dent 2023; 33 Suppl 2:66-68. [PMID: 37665153 DOI: 10.1111/ipd.13111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Affiliation(s)
- S Barrow
- Paediatric Dentistry and Dental and Maxillofacial Radiology, Leeds Dental Institute, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - J Talbot
- Paediatric Dentistry and Dental and Maxillofacial Radiology, Leeds Dental Institute, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - S Kindelan
- Paediatric Dentistry and Dental and Maxillofacial Radiology, Leeds Dental Institute, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - E Walker
- Paediatric Dentistry and Dental and Maxillofacial Radiology, Leeds Dental Institute, Leeds Teaching Hospitals NHS Trust, Leeds, UK
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3
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Maganin AG, Souza GR, Fonseca MD, Lopes AH, Mano Guimarães RM, Dagostin A, Cecilio NT, Mendes AS, Gonçalves WA, Silva CE, Fernandes Gomes FI, Mauriz Marques LM, Silva RL, Arruda LM, Santana DA, Lemos H, Huang L, Davoli-Ferreira M, Santana-Coelho DS, Sant'Anna MB, Kusuda R, Talbot J, Pacholczyk G, Buqui GA, Lopes N, Alves-Filho JC, Leão RM, O'Connor JC, Cunha FQ, Mellor A, Cunha T. Meningeal dendritic cells drive neuropathic pain through elevation of the kynurenine metabolic pathway in mice. J Clin Invest 2022; 132:153805. [PMID: 36227694 DOI: 10.1172/jci153805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 10/11/2022] [Indexed: 11/17/2022] Open
Abstract
Neuropathic pain is one of the most important clinical consequences of injury to the somatosensory system. Nevertheless, the critical pathophysiological mechanisms involved in neuropathic pain development are poorly understood. In this study, we found that neuropathic pain is abrogated when the kynurenine metabolic pathway initiated by the enzyme indoleamine 2,3-dioxygenase (IDO1) is ablated pharmacologically or genetically. Mechanistically, it was found that IDO1-expressing dendritic cells (DCs) accumulated in the dorsal root leptomeninges and led to an increase in kynurenine levels in the spinal cord. In the spinal cord, kynurenine was metabolized by kynurenine-3-monooxygenase-expressing astrocytes into a pro-nociceptive metabolite 3-hydroxykynurenine. Ultimately, 3-hydroxyanthranilate 3,4-dioxygenase-derived quinolinic acid formed in the final step of the canonical KYNPATH was also involved in neuropathic pain development through the activation of the glutamatergic N-methyl-D-aspartate (NMDA) receptor. In conclusion, these data revealed a novel role for DCs driving neuropathic pain development through elevation of the kynurenine metabolic pathway. This novel paradigm offers potential new targets for drug development against this type of chronic pain.
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Affiliation(s)
- Alexandre Gm Maganin
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Guilherme R Souza
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Miriam D Fonseca
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Alexandre H Lopes
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Rafaela M Mano Guimarães
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - André Dagostin
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Nerry T Cecilio
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Atlante S Mendes
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - William A Gonçalves
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Conceição Ea Silva
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | | | - Lucas M Mauriz Marques
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Rangel L Silva
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Letícia M Arruda
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Denis A Santana
- Department of Pharmacology, University of São Paulo at Ribeirão Preto Medical School, Ribeirao Preto, Brazil
| | - Henrique Lemos
- Cancer Immunology, Inflammation and Tolerance Program, Cancer Center, Georgia Regents University, Augusta, United States of America
| | - Lei Huang
- Cancer Immunology, Inflammation and Tolerance Program, Cancer Center, Georgia Regents University, Augusta, United States of America
| | - Marcela Davoli-Ferreira
- Department of Pharmacology, University of São Paulo at Ribeirão Preto Medical School, Ribeirao Preto, Brazil
| | - Danielle S Santana-Coelho
- Department of Pharmacology, University of Texas Health Science Center at San Antonio and Audie L. Murphy VA Hospital, San Antonio, United States of America
| | - Morena B Sant'Anna
- Department of Pharmacology, University of São Paulo at Ribeirão Preto Medical School, Ribeirao Preto, Brazil
| | - Ricardo Kusuda
- Department of Pharmacology, University of São Paulo at Ribeirão Preto Medical School, Ribeirao Preto, Brazil
| | - Jhimmy Talbot
- Department of Pharmacology, University of São Paulo at Ribeirão Preto Medical School, Ribeirao Preto, Brazil
| | - Gabriela Pacholczyk
- Cancer Immunology, Inflammation and Tolerance Program, Cancer Center, Georgia Regents University, Augusta, United States of America
| | - Gabriela A Buqui
- NPPNS, Department of Physic and Chemistry, School of Pharmaceutical Sciences of Ribeirão Preto, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Norberto Lopes
- NPPNS, Department of Physic and Chemistry, School of Pharmaceutical Sciences of Ribeirão Preto, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Jose C Alves-Filho
- Department of Pharmacology, University of São Paulo at Ribeirão Preto Medical School, Ribeirao Preto, Brazil
| | - Ricardo M Leão
- Graduate Program in Basic and Applied Immunology Ribeirao Preto Medical Sch, University of Sao Paulo, Ribeirao Preto, Brazil
| | - Jason C O'Connor
- Department of Pharmacolog, University of Texas Health Science Center at San Antonio and Audie L. Murphy VA Hospital, San Antonio, United States of America
| | - Fernando Q Cunha
- Department of Pharmacology, University of São Paulo at Ribeirão Preto Medical School, Ribeirao Preto, Brazil
| | - Andrew Mellor
- Cancer Immunology, Inflammation and Tolerance Program, Cancer Center, Georgia Regents University, Augusta, United States of America
| | - Thiago Cunha
- Department of Pharmacology, University of São Paulo at Ribeirão Preto Medical School, Ribeirao Preto, Brazil
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4
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Kedmi R, Najar TA, Mesa KR, Grayson A, Kroehling L, Hao Y, Hao S, Pokrovskii M, Xu M, Talbot J, Wang J, Germino J, Lareau CA, Satpathy AT, Anderson MS, Laufer TM, Aifantis I, Bartleson JM, Allen PM, Paidassi H, Gardner JM, Stoeckius M, Littman DR. A RORγt + cell instructs gut microbiota-specific T reg cell differentiation. Nature 2022; 610:737-743. [PMID: 36071167 PMCID: PMC9908423 DOI: 10.1038/s41586-022-05089-y] [Citation(s) in RCA: 70] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 07/08/2022] [Indexed: 01/19/2023]
Abstract
The mutualistic relationship of gut-resident microbiota and the host immune system promotes homeostasis that ensures maintenance of the microbial community and of a largely non-aggressive immune cell compartment1,2. The consequences of disturbing this balance include proximal inflammatory conditions, such as Crohn's disease, and systemic illnesses. This equilibrium is achieved in part through the induction of both effector and suppressor arms of the adaptive immune system. Helicobacter species induce T regulatory (Treg) and T follicular helper (TFH) cells under homeostatic conditions, but induce inflammatory T helper 17 (TH17) cells when induced Treg (iTreg) cells are compromised3,4. How Helicobacter and other gut bacteria direct T cells to adopt distinct functions remains poorly understood. Here we investigated the cells and molecular components required for iTreg cell differentiation. We found that antigen presentation by cells expressing RORγt, rather than by classical dendritic cells, was required and sufficient for induction of Treg cells. These RORγt+ cells-probably type 3 innate lymphoid cells and/or Janus cells5-require the antigen-presentation machinery, the chemokine receptor CCR7 and the TGFβ activator αv integrin. In the absence of any of these factors, there was expansion of pathogenic TH17 cells instead of iTreg cells, induced by CCR7-independent antigen-presenting cells. Thus, intestinal commensal microbes and their products target multiple antigen-presenting cells with pre-determined features suited to directing appropriate T cell differentiation programmes, rather than a common antigen-presenting cell that they endow with appropriate functions.
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Affiliation(s)
- Ranit Kedmi
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY, USA
| | - Tariq A Najar
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY, USA
| | - Kailin R Mesa
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY, USA
| | - Allyssa Grayson
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY, USA.,Howard Hughes Medical Institute, New York, NY, USA
| | - Lina Kroehling
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY, USA
| | - Yuhan Hao
- Center for Genomics and Systems Biology, New York University, New York, NY, USA.,New York Genome Center, New York, NY, USA
| | - Stephanie Hao
- Technology Innovation Lab, New York Genome Center, New York, NY, USA
| | - Maria Pokrovskii
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY, USA.,Calico Life Sciences, LLC, South San Francisco, CA, USA
| | - Mo Xu
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY, USA.,National Institute for Biological Sciences, Beijing, China
| | - Jhimmy Talbot
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY, USA.,Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Jiaxi Wang
- Diabetes Center, University of California, San Francisco, San Francisco, CA, USA
| | - Joe Germino
- Diabetes Center, University of California, San Francisco, San Francisco, CA, USA
| | - Caleb A Lareau
- Department of Pathology, Stanford University, Stanford, CA, USA.,Parker Institute for Cancer Immunotherapy, Stanford University, Stanford, CA, USA.,Gladstone-UCSF Institute of Genomic Immunology, San Francisco, CA, USA
| | - Ansuman T Satpathy
- Department of Pathology, Stanford University, Stanford, CA, USA.,Parker Institute for Cancer Immunotherapy, Stanford University, Stanford, CA, USA.,Gladstone-UCSF Institute of Genomic Immunology, San Francisco, CA, USA
| | - Mark S Anderson
- Diabetes Center, University of California, San Francisco, San Francisco, CA, USA
| | - Terri M Laufer
- Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Department of Medicine, C. Michael Crescenz Veterans Administration Medical Center, Philadelphia, PA, USA
| | - Iannis Aifantis
- Department of Pathology, New York University School of Medicine, New York, NY, USA
| | - Juliet M Bartleson
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA.,Federation Bio, South San Francisco, CA, USA
| | - Paul M Allen
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA
| | - Helena Paidassi
- CIRI, Centre International de Recherche en Infectiologie, Université de Lyon, INSERM U1111, Université Claude Bernard Lyon 1, CNRS UMR5308, ENS de Lyon, Lyon, France
| | - James M Gardner
- Diabetes Center, University of California, San Francisco, San Francisco, CA, USA.,Department of Surgery, University of California, San Francisco, San Francisco, CA, USA
| | - Marlon Stoeckius
- Technology Innovation Lab, New York Genome Center, New York, NY, USA.,10X Genomics, Stockholm, Sweden
| | - Dan R Littman
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY, USA. .,Howard Hughes Medical Institute, New York, NY, USA.
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5
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Talbot J, Højsgaard Chow H, Holm Hansen R, von Essen MR, Sellebjerg F. Immunological effects of dimethyl fumarate treatment in blood and CSF of patients with primary progressive MS. J Neuroimmunol 2021; 361:577756. [PMID: 34739914 DOI: 10.1016/j.jneuroim.2021.577756] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 09/10/2021] [Accepted: 10/17/2021] [Indexed: 01/22/2023]
Abstract
Dimethyl fumarate is an efficient therapy used widely in patients with relapsing-remitting multiple sclerosis (RRMS). However, lacking effect of treatment has recently been reported in patients with primary progressive MS (PPMS) (Højsgaard Chow et al., 2021). In order to further analyze the immunological treatment response we investigated the systemic and intrathecal immunological effects of dimethyl fumarate (DMF) treatment in 50 patients with PPMS who participated in a 48-week randomized controlled trial with dimethyl fumarate vs placebo. We found substantial systemic immunomodulatory effects of DMF treatment comparable with those observed in patients with RRMS. However, intrathecal effects were limited and restricted to CD4+ T cells presumably resulting in higher concentrations of intrathecal IL-7.
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Affiliation(s)
- J Talbot
- Danish Multiple Sclerosis Center, Department of Neurology, Copenhagen University Hospital - Rigshospitalet, Glostrup, Denmark.
| | - H Højsgaard Chow
- Danish Multiple Sclerosis Center, Department of Neurology, Copenhagen University Hospital - Rigshospitalet, Glostrup, Denmark
| | - R Holm Hansen
- Danish Multiple Sclerosis Center, Department of Neurology, Copenhagen University Hospital - Rigshospitalet, Glostrup, Denmark
| | - M Rode von Essen
- Danish Multiple Sclerosis Center, Department of Neurology, Copenhagen University Hospital - Rigshospitalet, Glostrup, Denmark
| | - F Sellebjerg
- Danish Multiple Sclerosis Center, Department of Neurology, Copenhagen University Hospital - Rigshospitalet, Glostrup, Denmark; Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
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6
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Saraiva AL, Peres RS, Veras FP, Talbot J, de Lima KA, Luiz JPM, Cunha TM, Louzada-Junior P, Cunha FQ, Alves-Filho JC. Citrullinated human fibrinogen triggers arthritis through an inflammatory response mediated by IL-23/IL-17 immune axis. Int Immunopharmacol 2021; 101:108363. [PMID: 34810129 DOI: 10.1016/j.intimp.2021.108363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 11/08/2021] [Accepted: 11/09/2021] [Indexed: 11/30/2022]
Abstract
Rheumatoid arthritis (RA) is an autoimmune disease that causes joint destruction. Although its etiology remains unknown, citrullinated proteins have been considered as an auto-antigen able to trigger an inflammatory response in RA. Herein, we modified the classical antigen-induced arthritis (AIA) model by using citrullinated human plasma fibrinogen (hFIB) as an immunogen to investigate the mechanism of inflammation-driven joint damage by citrullinated hFIB in C57BL/6 mice. We found that hFIB-immunized mice showed high serum levels of anti-citrullinated peptides antibodies (ACPAs). Moreover, hFIB immunized mice showed increased mechanical hyperalgesia, massive leukocyte infiltration, high levels of inflammatory mediators, and progressive joint damage after the intra-articular challenge with citrullinated hFIB. Interestingly, hFIB-induced arthritis was dependent on IL-23/IL-17 immune axis-mediated inflammatory responses since leukocyte infiltration and mechanical hyperalgesia were abrogated in Il17ra-/- and Il23a-/- mice. Thus, we have characterized a novel model of experimental arthritis suitable to investigate the contribution of ACPAs and Th17 cell-mediated immune response in the pathogenesis of RA.
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Affiliation(s)
- André Lopes Saraiva
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo, Avenida Bandeirantes 3900, Ribeirão Preto, São Paulo 14049-900, Brazil
| | - Raphael Sanches Peres
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo, Avenida Bandeirantes 3900, Ribeirão Preto, São Paulo 14049-900, Brazil
| | - Flávio Protasio Veras
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo, Avenida Bandeirantes 3900, Ribeirão Preto, São Paulo 14049-900, Brazil
| | - Jhimmy Talbot
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo, Avenida Bandeirantes 3900, Ribeirão Preto, São Paulo 14049-900, Brazil
| | - Kalil Alves de Lima
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo, Avenida Bandeirantes 3900, Ribeirão Preto, São Paulo 14049-900, Brazil
| | - João Paulo Mesquita Luiz
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo, Avenida Bandeirantes 3900, Ribeirão Preto, São Paulo 14049-900, Brazil
| | - Thiago Mattar Cunha
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo, Avenida Bandeirantes 3900, Ribeirão Preto, São Paulo 14049-900, Brazil
| | - Paulo Louzada-Junior
- Division of Rheumatology, Department of Internal Medicine, School of Medicine of Ribeirão Preto, University of São Paulo, Avenida Bandeirantes 3900, Ribeirão Preto, São Paulo 14049-900, Brazil
| | - Fernando Queiroz Cunha
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo, Avenida Bandeirantes 3900, Ribeirão Preto, São Paulo 14049-900, Brazil
| | - José Carlos Alves-Filho
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo, Avenida Bandeirantes 3900, Ribeirão Preto, São Paulo 14049-900, Brazil.
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7
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Sano T, Kageyama T, Fang V, Kedmi R, Martinez CS, Talbot J, Chen A, Cabrera I, Gorshko O, Kurakake R, Yang Y, Ng C, Schwab SR, Littman DR. Redundant cytokine requirement for intestinal microbiota-induced Th17 cell differentiation in draining lymph nodes. Cell Rep 2021; 36:109766. [PMID: 34551308 DOI: 10.1016/j.celrep.2021.109766] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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8
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Sano T, Kageyama T, Fang V, Kedmi R, Martinez CS, Talbot J, Chen A, Cabrera I, Gorshko O, Kurakake R, Yang Y, Ng C, Schwab SR, Littman DR. Redundant cytokine requirement for intestinal microbiota-induced Th17 cell differentiation in draining lymph nodes. Cell Rep 2021; 36:109608. [PMID: 34433045 DOI: 10.1016/j.celrep.2021.109608] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 05/18/2021] [Accepted: 08/05/2021] [Indexed: 01/10/2023] Open
Abstract
Differentiation of intestinal T helper 17 (Th17) cells, which contribute to mucosal barrier protection from invasive pathogens, is dependent on colonization with distinct commensal bacteria. Segmented filamentous bacteria (SFB) are sufficient to support Th17 cell differentiation in mouse, but the molecular and cellular requirements for this process remain incompletely characterized. Here, we show that intestine-draining mesenteric lymph nodes (MLNs), not intestine proper, are the dominant site of SFB-induced intestinal Th17 cell differentiation. Subsequent migration of these cells to the intestinal lamina propria is dependent on their upregulation of integrin β7. Stat3-dependent induction of RORγt, the Th17 cell-specifying transcription factor, largely depends on IL-6, but signaling through the receptors for IL-21 and IL-23 can compensate for absence of IL-6 to promote SFB-directed Th17 cell differentiation. These results indicate that redundant cytokine signals guide commensal microbe-dependent Th17 cell differentiation in the MLNs and accumulation of the cells in the lamina propria.
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Affiliation(s)
- Teruyuki Sano
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY 10016, USA; Department of Microbiology and Immunology, University of Illinois at Chicago, College of Medicine, Chicago, IL 60612, USA.
| | - Takahiro Kageyama
- Department of Microbiology and Immunology, University of Illinois at Chicago, College of Medicine, Chicago, IL 60612, USA
| | - Victoria Fang
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY 10016, USA
| | - Ranit Kedmi
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY 10016, USA
| | - Carlos Serafin Martinez
- Department of Microbiology and Immunology, University of Illinois at Chicago, College of Medicine, Chicago, IL 60612, USA
| | - Jhimmy Talbot
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY 10016, USA
| | - Alessandra Chen
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY 10016, USA; The Howard Hughes Medical Institute, New York University School of Medicine, New York, NY 10016, USA
| | - Ivan Cabrera
- Department of Microbiology and Immunology, University of Illinois at Chicago, College of Medicine, Chicago, IL 60612, USA
| | - Oleksandra Gorshko
- Department of Microbiology and Immunology, University of Illinois at Chicago, College of Medicine, Chicago, IL 60612, USA
| | - Reina Kurakake
- Department of Microbiology and Immunology, University of Illinois at Chicago, College of Medicine, Chicago, IL 60612, USA
| | - Yi Yang
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY 10016, USA
| | - Charles Ng
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY 10016, USA
| | - Susan R Schwab
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY 10016, USA
| | - Dan R Littman
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY 10016, USA; The Howard Hughes Medical Institute, New York University School of Medicine, New York, NY 10016, USA.
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9
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Talbot J, Littman DR. Immune cell control of nutrient absorption. Science 2021; 371:1202-1203. [PMID: 33737473 DOI: 10.1126/science.abg6455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Jhimmy Talbot
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY, USA.
| | - Dan R Littman
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY, USA. .,Howard Hughes Medical Institute, New York, NY, USA
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10
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Talbot J, Stuckey R, Crawford L, Weatherby S, Mullin S. Improvements in pain, medication use and quality of life in onabotulinumtoxinA-resistant chronic migraine patients following erenumab treatment - real world outcomes. J Headache Pain 2021; 22:5. [PMID: 33421995 PMCID: PMC7797151 DOI: 10.1186/s10194-020-01214-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 12/26/2020] [Indexed: 12/21/2022] Open
Abstract
Background The CGRP antagonists offer a novel therapeutic approach in migraine. Their utility in patients with severe forms of chronic migraine is a subject of particular interest. We present outcomes of 9 months of erenumab treatment in a cohort of patients with difficult-to-control chronic migraine, all of whom had prior unsatisfactory response to onabotulinumtoxinA. Methods We offered erenumab to 98 patients with a prior unsatisfactory response to onabotulinumtoxinA. Eighty of 98 had trialled greater occipital nerve injections (82%), 32/98 peripheral neurostimulation (33%) and 18/98 intravenous dihydroergotamine (18%). Thirty eight of 98 (39%) met the definition of triptan overuse and 43/98 (44%) analgesic overuse. All patients met the EHF criteria for ‘resistant migraine’. Outcome measures (recorded monthly) included days with headache limiting activities of daily living (“red”), not limiting (“amber”), headache free (“green”), and requiring triptans or other analgesics. Quality of life scores - headache impact test 6 (HIT-6), patient health questionnaire 9 (PHQ-9) and pain disability index (PDI) - were also measured. Results Mean number of red days improved by − 6.4 days (SE 0.67, 95%CI − 7.7 to − 5.1, p=0.001) at 3 months; − 6.8 days (SE 0.96, 95%CI − 8.80 to − 4.9, p=0.001) at 6 months and − 6.5 days (SE 0.86, 95%CI − 8.3 to − 4.8, p=0.001) at 9 months. Repeated measures ANOVA confirmed improvements in the number of red (p=0.001), green (p=0.001), triptan (p=0.001) and painkiller days (p=0.001) as well as scores of the HIT-6 (p=0.001), PHQ-9 (p=0.001), and PDI (p=0.001) across the duration of study. Conclusion We observed improvements in pain, medication use and quality of life in onabotulinumtoxinA-resistant chronic migraine patients following erenumab treatment. Supplementary Information The online version contains supplementary material available at 10.1186/s10194-020-01214-2.
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Affiliation(s)
- J Talbot
- Southwest Neurology Audit and Research group (SoNAR), Department of Neurology, Derriford Hospital, Plymouth, PL6 8DH, UK.
| | - R Stuckey
- Southwest Neurology Audit and Research group (SoNAR), Department of Neurology, Derriford Hospital, Plymouth, PL6 8DH, UK
| | - L Crawford
- Southwest Neurology Audit and Research group (SoNAR), Department of Neurology, Derriford Hospital, Plymouth, PL6 8DH, UK
| | - S Weatherby
- Southwest Neurology Audit and Research group (SoNAR), Department of Neurology, Derriford Hospital, Plymouth, PL6 8DH, UK
| | - S Mullin
- Peninsula Medical School, University of Plymouth, Plymouth, UK.,UCL Queen Square Institute of Neurology, University College London, London, UK
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Martin LJ, Chen Y, Serrano-Lomelin J, Talbot J, Yasui Y. Higher levels of social and material deprivation are associated with higher rates of influenza-like illness-related emergency department visits: Edmonton, Alberta, 2004-2014. Public Health 2020; 189:117-122. [PMID: 33221645 DOI: 10.1016/j.puhe.2020.06.039] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 04/05/2020] [Accepted: 06/19/2020] [Indexed: 10/23/2022]
Abstract
OBJECTIVES Neighbourhood-level deprivation is associated with hospitalization related to respiratory infections; however, hospitalizations exclude many who seek care with less severe respiratory illnesses. Another major seasonal contributor to respiratory illness-associated healthcare burdens are influenza-like illness (ILI)-related emergency department (ED) visits. We investigated associations between area-level social and material deprivation and ILI-related ED use. STUDY DESIGN This is a retrospective ecological study. METHODS We linked ILI-related ED visit data (2004-2014) for Edmonton, Alberta to a Canadian area-level material and social deprivation index, categorizing deprivation into quintiles. Using a multivariable Poisson model with log population as the offset, we modelled the relationship between visit rates and material and social deprivation adjusting for week and season, age, sex and the interaction between age and sex. RESULTS We included 67,585 ILI-related ED visits, representing 1075.5 (95% confidence interval (CI) = 1067.4-1083.6) visits per 100,000 person-years. ILI-related visit rates increased as each of material and social deprivation increased; increases were slightly greater for material deprivation. Comparing the most deprived quintile to the least deprived quintile: for material deprivation, ILI-related ED visit rates were two times higher (rate ratio (RR) = 2.00, 95% CI = 1.96-2.05); and, for social deprivation, one-and-a-half times higher (RR = 1.47, 95% CI = 1.44-1.51). CONCLUSIONS Higher area-level material and social deprivation were associated with higher ILI-related ED visit rates. These findings can be used to identify areas that may need additional public health and healthcare resources and to improve targeting of prevention strategies. Understanding differentials in healthcare use such as this may be especially relevant to ensuring equity of outcomes for pandemic preparedness planning.
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Affiliation(s)
- L J Martin
- School of Public Health, University of Alberta, 11405 - 87 Ave, Edmonton, T6G 1C9, Alberta, Canada.
| | - Y Chen
- School of Public Health, University of Alberta, 11405 - 87 Ave, Edmonton, T6G 1C9, Alberta, Canada
| | - J Serrano-Lomelin
- School of Public Health, University of Alberta, 11405 - 87 Ave, Edmonton, T6G 1C9, Alberta, Canada
| | - J Talbot
- School of Public Health, University of Alberta, 11405 - 87 Ave, Edmonton, T6G 1C9, Alberta, Canada
| | - Y Yasui
- School of Public Health, University of Alberta, 11405 - 87 Ave, Edmonton, T6G 1C9, Alberta, Canada; Department of Epidemiology and Cancer Control, St. Jude Children's Research Hospital, Memphis, TN, USA.
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De Vleeschouwer F, Baron S, Cloy JM, Enrico M, Ettler V, Fagel N, Kempter H, Kylander M, Li C, Longman J, Martinez-Cortizas A, Marx S, Mattielli N, Mighall T, Nieminen TM, Piotrowska N, Pontevedra-Pombal X, Pratte S, Renson V, Shotyk W, Shuttleworth E, Sikorski J, Stromsoe N, Talbot J, von Scheffer C, Weiss D, Zaccone C, Le Roux G. Comment on: "A novel approach to peatlands as archives of total cumulative spatial pollution loads from atmospheric deposition of airborne elements complementary to EMEP data: Priority pollutants (Pb, Cd, Hg)" by Ewa Miszczak, Sebastian Stefaniak, Adam Michczyński, Eiliv Steinnes and Irena Twardowska. Sci Total Environ 2020; 737:138699. [PMID: 32376094 DOI: 10.1016/j.scitotenv.2020.138699] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 04/06/2020] [Accepted: 04/12/2020] [Indexed: 06/11/2023]
Abstract
A recent paper by Miszczak et al. (2020) examines metal contamination of mires in Poland and Norway. The authors conclude that lead (Pb) records in ombrotrophic peatlands cannot be used to reconstruct the chronological history of anthropogenic activities due to post-depositional mobility of the metal. We contest this general conclusion which stands in contrast with a significant body of literature demonstrating that Pb is largely immobile in the vast majority of ombrotrophic peatlands. Our aim is to reaffirm the crucial contribution that peat records have made to our knowledge of atmospheric Pb contamination. In addition, we reiterate the necessity of following established protocols to produce reliable records of anthropogenic Pb contamination in environmental archives.
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Affiliation(s)
- F De Vleeschouwer
- Instituto Franco-Argentino para el Estudio del Clima y sus Impactos (UMI IFAECI/CNRS-CONICET-UBA-IRD), Argentina.
| | - S Baron
- Laboratoire TRACES (CNRS, Université de Toulouse), France
| | - J M Cloy
- Scotland's Rural College, Edinburgh, UK
| | - M Enrico
- Harvard John A. Paulson School of Engineering and Applied Science, Harvard University, Cambridge, MA, USA
| | - V Ettler
- Charles University, Faculty of Science, Prague, Czech Republic
| | - N Fagel
- AGEs, Département de Géologie, Université de Liège, Belgium
| | - H Kempter
- Welzheimer Str. 14, D-71566 Althuette, Germany
| | - M Kylander
- Department of Geological Sciences and the Bolin Centre for Climate Research, Stockholm University, Sweden
| | - C Li
- Geoscience Environnement Toulouse (CNRS-UPS-IRD-CNAP-CNES), France
| | - J Longman
- School of Geography and the Environment, University of Oxford, UK
| | | | - S Marx
- GeoQuEST Research Centre, School of Earth, Atmospheric and Life Sciences, University of Wollongong, Australia
| | - N Mattielli
- Laboratoire G-Time, Université Libre de Bruxelles, Belgium
| | - T Mighall
- School of Geosciences, University of Aberdeen, UK
| | - T M Nieminen
- Natural Resources Institute Finland Luke, Helsinki, Finland
| | - N Piotrowska
- Silesian University of Technology, Institute of Physics-CSE, GADAM Center, Gliwice, Poland
| | | | - S Pratte
- Department of Geography, School of Earth Sciences, Zhejiang University, Hangzhou, China
| | - V Renson
- Research Reactor, University of Missouri, USA
| | - W Shotyk
- Department of Renewable Resources, University of Alberta, Edmonton, Canada
| | | | - J Sikorski
- Silesian University of Technology, Institute of Physics-CSE, GADAM Center, Gliwice, Poland
| | - N Stromsoe
- College of Engineering, IT and Environment, Charles Darwin University, Australia
| | - J Talbot
- Département de Géographie, Université de Montréal, Canada
| | - C von Scheffer
- Institute for Ecosystem Research, Kiel University, Germany
| | - D Weiss
- Imperial College London, UK; Princeton University, Princeton, USA
| | - C Zaccone
- Department of Biotechnology, University of Verona, Italy
| | - G Le Roux
- Laboratoire Ecologie Fonctionnelle et Environnement, Université de Toulouse, CNRS, Toulouse, France
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13
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Talbot J, Hahn P, Kroehling L, Nguyen H, Li D, Littman DR. Feeding-dependent VIP neuron-ILC3 circuit regulates the intestinal barrier. Nature 2020; 579:575-580. [PMID: 32050257 PMCID: PMC7135938 DOI: 10.1038/s41586-020-2039-9] [Citation(s) in RCA: 178] [Impact Index Per Article: 44.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 01/13/2020] [Indexed: 12/19/2022]
Abstract
The intestinal mucosa serves both as a conduit for the uptake of food-derived nutrients and microbiome-derived metabolites, and as a barrier that prevents tissue invasion by microorganisms and tempers inflammatory responses to the myriad contents of the lumen. How the intestine coordinates physiological and immune responses to food consumption to optimize nutrient uptake while maintaining barrier functions remains unclear. Here we show in mice how a gut neuronal signal triggered by food intake is integrated with intestinal antimicrobial and metabolic responses that are controlled by type-3 innate lymphoid cells (ILC3)1-3. Food consumption rapidly activates a population of enteric neurons that express vasoactive intestinal peptide (VIP)4. Projections of VIP-producing neurons (VIPergic neurons) in the lamina propria are in close proximity to clusters of ILC3 that selectively express VIP receptor type 2 (VIPR2; also known as VPAC2). Production of interleukin (IL)-22 by ILC3, which is upregulated by the presence of commensal microorganisms such as segmented filamentous bacteria5-7, is inhibited upon engagement of VIPR2. As a consequence, levels of antimicrobial peptide derived from epithelial cells are reduced but the expression of lipid-binding proteins and transporters is increased8. During food consumption, the activation of VIPergic neurons thus enhances the growth of segmented filamentous bacteria associated with the epithelium, and increases lipid absorption. Our results reveal a feeding- and circadian-regulated dynamic neuroimmune circuit in the intestine that promotes a trade-off between innate immune protection mediated by IL-22 and the efficiency of nutrient absorption. Modulation of this pathway may therefore be effective for enhancing resistance to enteropathogens2,3,9 and for the treatment of metabolic diseases.
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Affiliation(s)
- Jhimmy Talbot
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY, USA
| | - Paul Hahn
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY, USA
| | - Lina Kroehling
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY, USA
| | - Henry Nguyen
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY, USA
| | - Dayi Li
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY, USA
| | - Dan R Littman
- Molecular Pathogenesis Program, The Kimmel Center for Biology and Medicine of the Skirball Institute, New York University School of Medicine, New York, NY, USA.
- Howard Hughes Medical Institute, New York, NY, USA.
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14
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Csikar J, Vinall-Collier K, Richemond JM, Talbot J, Serban ST, Douglas GVA. Identifying the barriers and facilitators for homeless people to achieve good oral health. Community Dent Health 2019; 36:137-142. [PMID: 31070874 DOI: 10.1922/cdh_4488csikar06] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE A qualitative exploration of the barriers and facilitators for people experiencing homelessness achieving good oral health. PARTICIPANTS Adults using two homeless centres in Leeds. METHODS Focus group discussions were convened with homeless people using support services. Both an inductive and deductive approach to data analysis was taken. Themes were identified and then a framework applied to analysis using Nvivo software. RESULTS Three focus group discussions with 16 participants were conducted with people experiencing homelessness. The barriers identified were insufficient information on local dental services, negative attitudes of oral health professionals, low priority of dental care, anxiety and cost of dental treatments. Facilitators included single dental appointments, accessible dental locations and being treated with respect. CONCLUSIONS Despite the barriers that prevent people experiencing homelessness from maintaining and improving their oral health, the participants were aware that they needed oral healthcare and requested that dental services were made available to them and were accessible in line with their socioeconomic status and needs.
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Affiliation(s)
- J Csikar
- The University of Leeds School of Dentistry.,Public Health England
| | | | | | - J Talbot
- City Healthcare Partnership and Harrogate Hospitals
| | - S T Serban
- The University of Leeds School of Dentistry
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15
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de Lima KA, Donate PB, Talbot J, Davoli-Ferreira M, Peres RS, Cunha TM, Alves-Filho JC, Cunha FQ. TGFβ1 signaling sustains aryl hydrocarbon receptor (AHR) expression and restrains the pathogenic potential of T H17 cells by an AHR-independent mechanism. Cell Death Dis 2018; 9:1130. [PMID: 30425241 PMCID: PMC6234206 DOI: 10.1038/s41419-018-1107-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 06/21/2018] [Accepted: 06/25/2018] [Indexed: 12/15/2022]
Abstract
The aryl hydrocarbon receptor (AHR) is a transcription factor activated by ligand highly expressed on TH17 cells, and AHR-deficient CD4+ T cells have impaired production of IL-17A and IL-22. Although AHR activation can exacerbate in vivo TH17 cell-mediated autoimmunity, accumulating data indicate that AHR is a nonpathogenic TH17 marker. Thus it remains unclear how AHR activation is regulated and impacts on the generation of TH17 subsets. Here we demonstrated that AHR pathway is activated during in vitro pathogenic TH17 polarization, but it is quickly downregulated. Under these conditions, additional AHR activation promoted IL-22 but not IL-17A. Interestingly, AHR high sustained expression and IL-17A promotion were only achieved when TGFβ1 was present in the culture. In addition to the effect on AHR regulation, TGFβ1 presented a dual role by simultaneously suppressing the TH17 pathogenic phenotype acquisition. This latter effect was independent of AHR stimulation, since its activation did not confer a TH17 anti-inflammatory profile and Ahr-/- cells did not upregulate any TH17 pathogenic marker. Through the use of EAE model, we demonstrated that AHR is still functional in encephalitogenic CD4+ T cells and the adoptive transfer of Ahr-/- TH17 cells to recipient mice resulted in milder EAE development when compared to their WT counterparts. Altogether, our data demonstrated that although AHR is highly expressed on in vitro-generated nonpathogenic TH17 cells, its ligation does not shift TH17 cells to an anti-inflammatory phenotype. Further studies investigating the role of AHR beyond TH17 differentiation may provide a useful understanding of the physiopathology of autoimmune diseases.
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MESH Headings
- Adoptive Transfer
- Animals
- Basic Helix-Loop-Helix Transcription Factors/deficiency
- Basic Helix-Loop-Helix Transcription Factors/genetics
- Basic Helix-Loop-Helix Transcription Factors/immunology
- Cell Differentiation
- Encephalomyelitis, Autoimmune, Experimental/chemically induced
- Encephalomyelitis, Autoimmune, Experimental/genetics
- Encephalomyelitis, Autoimmune, Experimental/immunology
- Encephalomyelitis, Autoimmune, Experimental/pathology
- Gene Expression Regulation
- Humans
- Immunophenotyping
- Interleukin-17/genetics
- Interleukin-17/immunology
- Interleukins/genetics
- Interleukins/immunology
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Myelin-Oligodendrocyte Glycoprotein/administration & dosage
- Peptide Fragments/administration & dosage
- Phenotype
- Primary Cell Culture
- Receptors, Aryl Hydrocarbon/deficiency
- Receptors, Aryl Hydrocarbon/genetics
- Receptors, Aryl Hydrocarbon/immunology
- Signal Transduction/immunology
- Th17 Cells/drug effects
- Th17 Cells/immunology
- Th17 Cells/pathology
- Th17 Cells/transplantation
- Transforming Growth Factor beta1/pharmacology
- Interleukin-22
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Affiliation(s)
- Kalil Alves de Lima
- Inflammation and Pain Laboratory, Center for Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Paula Barbim Donate
- Inflammation and Pain Laboratory, Center for Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Jhimmy Talbot
- Inflammation and Pain Laboratory, Center for Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Marcela Davoli-Ferreira
- Inflammation and Pain Laboratory, Center for Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Raphael Sanches Peres
- Inflammation and Pain Laboratory, Center for Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Thiago Mattar Cunha
- Inflammation and Pain Laboratory, Center for Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - José Carlos Alves-Filho
- Inflammation and Pain Laboratory, Center for Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Fernando Queiroz Cunha
- Inflammation and Pain Laboratory, Center for Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil.
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16
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Talbot J, Starr D. Chronic temporomandibular joint pain: A localised benign osteoma and review of the literature. Int J Surg 2018. [DOI: 10.1016/j.ijsu.2018.05.320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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17
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Talbot J, Karsai L, Crank S. Rosai-dorfman disease: A rare clinical entity. Case report and review of the literature. Int J Surg 2018. [DOI: 10.1016/j.ijsu.2018.05.321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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18
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Saraiva AL, Veras FP, Peres RS, Talbot J, de Lima KA, Luiz JP, Carballido JM, Cunha TM, Cunha FQ, Ryffel B, Alves-Filho JC. Succinate receptor deficiency attenuates arthritis by reducing dendritic cell traffic and expansion of T h17 cells in the lymph nodes. FASEB J 2018; 32:fj201800285. [PMID: 29894669 DOI: 10.1096/fj.201800285] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Rheumatoid arthritis is a chronic inflammatory disease that leads to significant changes in metabolic activity. Succinate, an intermediate of the tricarboxylic acid cycle, has emerged as a metabolic mediator of the innate immune response. However, the involvement of succinate in the generation of the adaptive immune response and establishment of autoimmune response has not been addressed thus far. Here we demonstrated that the succinate-sensing receptor (Sucnr1/GPR91) plays a critical role in the development of immune-mediated arthritis. We found that Sucnr1 acts as a chemotactic gradient sensor that guides dendritic cells (DCs) into the lymph nodes, orchestrating the expansion of the T helper (Th)17-cell population and the development of experimental antigen-induced arthritis. Sucnr1-/- mice show reduced articular hyperalgesia, neutrophil infiltration and inflammatory cytokines in the joint, and reduced frequency of Th17 cells in draining lymph nodes. Adoptive transfer of wild-type (WT) DCs into Sucnr1-/- mice restored the development of arthritis. Moreover, DC-depleted mice transferred with Sucnr1-/- DCs developed less arthritis than mice transferred with WT DCs. In contrast, succinate given together with the immunization boosted the recruitment of DCs and the frequency of Th17 cells in draining lymph nodes, increasing arthritis severity. Therefore, the blockade of Sucnr1 may represent a novel therapeutic target of arthritis.-Saraiva, A. L., Veras, F. P., Peres, R. S., Talbot, J., de Lima, K. A., Luiz, J. P., Carballido, J. M., Cunha, T. M., Cunha, F. Q., Ryffel, B., Alves-Filho, J. C. Succinate receptor deficiency attenuates arthritis by reducing dendritic cell traffic and expansion of Th17 cells in the lymph nodes.
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Affiliation(s)
- André L Saraiva
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Sao Paulo, Brazil
| | - Flávio P Veras
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Sao Paulo, Brazil
| | - Raphael S Peres
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Sao Paulo, Brazil
| | - Jhimmy Talbot
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Sao Paulo, Brazil
| | - Kalil A de Lima
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Sao Paulo, Brazil
| | - João P Luiz
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Sao Paulo, Brazil
| | | | - Thiago M Cunha
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Sao Paulo, Brazil
- Center for Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, Sao Paulo, Brazil
| | - Fernando Q Cunha
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Sao Paulo, Brazil
- Center for Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, Sao Paulo, Brazil
| | - Bernhard Ryffel
- Molecular and Experimental Immunology and Neurogenetics, Unité Mixte de Recherche 7355 Centre National de la Recherche Scientifique, University of Orleans, Orleans, France
| | - Jose C Alves-Filho
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Sao Paulo, Brazil
- Center for Research in Inflammatory Diseases, Ribeirao Preto Medical School, University of Sao Paulo, Sao Paulo, Brazil
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Talbot J, Peres RS, Pinto LG, Oliveira RDR, Lima KA, Donate PB, Silva JR, Ryffel B, Cunha TM, Alves-Filho JC, Liew FY, Louzada-Junior P, de Queiroz Cunha F. Smoking-induced aggravation of experimental arthritis is dependent of aryl hydrocarbon receptor activation in Th17 cells. Arthritis Res Ther 2018; 20:119. [PMID: 29884199 PMCID: PMC5994132 DOI: 10.1186/s13075-018-1609-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 04/26/2018] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Epidemiologic studies have highlighted the association of environmental factors with the development and progression of autoimmune and chronic inflammatory diseases. Among the environmental factors, smoking has been associated with increased susceptibility and poor prognosis in rheumatoid arthritis (RA). However, the immune and molecular mechanism of smoking-induced arthritis aggravation remains unclear. The transcription factor aryl hydrocarbon receptor (AHR) regulates the generation of Th17 cells, CD4 T cells linked the development of autoimmune diseases. AHR is activated by organic compounds including polycyclic aromatic hydrocarbons (PAHs), which are environmental pollutants that are also present in cigarette smoke. In this study, we investigated the role of AHR activation in the aggravation of experiment arthritis induced by exposure to cigarette smoke. METHODS Mice were exposed to cigarette smoke during the developmental phase of antigen-induced arthritis and collagen-induced arthritis to evaluate the effects of smoking on disease development. Aggravation of articular inflammation was assessed by measuring neutrophil migration to the joints, increase in articular hyperalgesia and changes in the frequencies of Th17 cells. In vitro studies were performed to evaluate the direct effects of cigarette smoke and PAH on Th17 differentiation. We also used mice genetically deficient for AHR (Ahr KO) and IL-17Ra (Il17ra KO) to determine the in vivo mechanism of smoking-induced arthritis aggravation. RESULTS We found that smoking induces arthritis aggravation and increase in the frequencies of Th17 cells. The absence of IL-17 signaling (Il17ra KO) conferred protection to smoking-induced arthritis aggravation. Moreover, in vitro experiments showed that cigarette smoke can directly increase Th17 differentiation of T cells by inducing AHR activation. Indeed, Ahr KO mice were protected from cigarette smoke-induced arthritis aggravation and did not display increase in TH17 frequencies, suggesting that AHR activation is an important mechanism for cigarette smoke effects on arthritis. Finally, we demonstrate that PAHs are also able to induce arthritis aggravation. CONCLUSIONS Our data demonstrate that the disease-exacerbating effects of cigarette smoking are AHR dependent and environmental pollutants with AHR agonist activity can induce arthritis aggravation by directly enhancing Th17 cell development.
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MESH Headings
- Animals
- Arthritis, Experimental/etiology
- Arthritis, Experimental/genetics
- Arthritis, Experimental/metabolism
- Azo Compounds/pharmacology
- Male
- Mice, Inbred C57BL
- Mice, Inbred DBA
- Mice, Knockout
- Pyrazoles/pharmacology
- Receptors, Aryl Hydrocarbon/antagonists & inhibitors
- Receptors, Aryl Hydrocarbon/genetics
- Receptors, Aryl Hydrocarbon/metabolism
- Receptors, Interleukin-17/genetics
- Receptors, Interleukin-17/metabolism
- Smoke/adverse effects
- Th17 Cells/metabolism
- Nicotiana/chemistry
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Affiliation(s)
- Jhimmy Talbot
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Av. Bandeirantes, 3900, Ribeirao Preto, SP, 14049900, Brazil
| | - Raphael S Peres
- Department of Immunology, Ribeirao Preto Medical School, University of São Paulo, Ribeirao Preto, Brazil
| | - Larissa G Pinto
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Av. Bandeirantes, 3900, Ribeirao Preto, SP, 14049900, Brazil
| | - Rene D R Oliveira
- Division of Clinical Immunology, Ribeirao Preto Medical School, University of São Paulo, Ribeirao Preto, Brazil
| | - Kalil A Lima
- Department of Immunology, Ribeirao Preto Medical School, University of São Paulo, Ribeirao Preto, Brazil
| | - Paula B Donate
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Av. Bandeirantes, 3900, Ribeirao Preto, SP, 14049900, Brazil
| | - Jaqueline R Silva
- Department of Immunology, Ribeirao Preto Medical School, University of São Paulo, Ribeirao Preto, Brazil
| | - Bernard Ryffel
- Université Orleans and Centre National de la Recherche Scientifique, Molecular Immunology, UMR7355, INEM, Orleans, France
- Institute of Infectious Disease and Molecular Medicine, UCT, Cape Town, South Africa
| | - Thiago M Cunha
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Av. Bandeirantes, 3900, Ribeirao Preto, SP, 14049900, Brazil
| | - José C Alves-Filho
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Av. Bandeirantes, 3900, Ribeirao Preto, SP, 14049900, Brazil
| | - Foo Y Liew
- Division of Immunology, Infection and Inflammation, Glasgow Biomedical Research Centre, University of Glasgow, Glasgow, G12 8TA, UK.
- School of Biology and Basic Medical Sciences, Soochow University, Suzhou, 215006, China.
| | - Paulo Louzada-Junior
- Division of Clinical Immunology, Ribeirao Preto Medical School, University of São Paulo, Ribeirao Preto, Brazil.
| | - Fernando de Queiroz Cunha
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Av. Bandeirantes, 3900, Ribeirao Preto, SP, 14049900, Brazil.
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Peres RS, Donate PB, Talbot J, Cecilio NT, Lobo PR, Machado CC, Lima KWA, Oliveira RD, Carregaro V, Nakaya HI, Cunha TM, Alves-Filho JC, Liew FY, Louzada-Junior P, Cunha FQ. TGF-β signalling defect is linked to low CD39 expression on regulatory T cells and methotrexate resistance in rheumatoid arthritis. J Autoimmun 2018; 90:49-58. [PMID: 29426578 DOI: 10.1016/j.jaut.2018.01.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 01/17/2018] [Accepted: 01/19/2018] [Indexed: 11/30/2022]
Abstract
Rheumatoid arthritis (RA) is an autoimmune arthropathy characterized by chronic articular inflammation. Methotrexate (MTX) remains the first-line therapy for RA and its anti-inflammatory effect is associated with the maintenance of high levels of extracellular adenosine (ADO). Nonetheless, up to 40% of RA patients are resistant to MTX treatment and this is linked to a reduction of CD39 expression, an ectoenzyme involved in the generation of extracellular ADO by ATP metabolism, on circulating regulatory T cells (Tregs). However, the mechanism mediating the reduction of CD39 expression on Tregs is unknown. Here we demonstrated that the impairment in TGF-β signalling lead to the reduction of CD39 expression on Tregs that accounts for MTX resistance. TGF-β increases CD39 expression on Tregs via the activation of TGFBRII/TGFBRI, SMAD2 and the transcription factor CREB, which is activated in a p38-dependent manner and induces CD39 expression by promoting ENTPD1 gene transcription. Importantly, unresponsive patients to MTX (UR-MTX) show reduced expression of TGFBR2 and CREB1 and decreased levels of p-SMAD2 and p-CREB in Tregs compared to MTX-responsive patients (R-MTX). Furthermore, RA patients carrying at least one mutant allele for rs1431131 (AT or AA) of the TGFBR2 gene are significantly (p = 0.0006) associated with UR-MTX. Therefore, we have uncovered a molecular mechanism for the reduced CD39 expression on Tregs, and revealed potential targets for therapeutic intervention for MTX resistance.
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Affiliation(s)
- Raphael S Peres
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil; The Kennedy Institute of Rheumatology, University of Oxford, Oxford, United Kingdom
| | - Paula B Donate
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Jhimmy Talbot
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Nerry T Cecilio
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Patricia R Lobo
- Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Caio C Machado
- Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Kalil W A Lima
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Rene D Oliveira
- Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Vanessa Carregaro
- Department of Biochemistry and Immunology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Helder I Nakaya
- Department of Clinical and Toxicological Analysis, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Thiago M Cunha
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - José Carlos Alves-Filho
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Foo Y Liew
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, United Kingdom; School of Biological and Basic Medical Sciences, Soochow University, Suzhou, 215006, China.
| | - Paulo Louzada-Junior
- Department of Internal Medicine, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.
| | - Fernando Q Cunha
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.
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de Aquino SG, Talbot J, Sônego F, Turato WM, Grespan R, Avila-Campos MJ, Cunha FQ, Cirelli JA. The aggravation of arthritis by periodontitis is dependent of IL-17 receptor A activation. J Clin Periodontol 2017; 44:881-891. [PMID: 28498497 DOI: 10.1111/jcpe.12743] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/08/2017] [Indexed: 01/22/2023]
Abstract
AIM To evaluate whether Porphyromonas gingivalis-induced periodontitis aggravates the antigen-induced arthritis (AIA) model, and whether this effect is dependent on the Th17/IL-17 signalling pathway. MATERIALS AND METHODS Antigen-induced arthritis was triggered by local injection of methylated bovine serum albumin into the knee joint of previously immunized C57BL/6 wild-type (WT) and IL-17 receptor A (IL-17RA)-knockout mice. Periodontal disease in naïve or arthritic mice was induced by oral infection with P. gingivalis. Animals were sacrificed 7, 15 and 30 days after infection. Alveolar bone loss, joint histopathology, articular hyperalgesia and joint cytokine production were assessed, in addition to the proportion of Th17 and Treg cells isolated from the inguinal lymph nodes. RESULTS No influence of experimentally-induced arthritis was found on the alveolar bone resorption induced by P. gingivalis. However, mice with experimentally-induced arthritis that were exposed to P. gingivalis presented higher joint damage and Th17 frequencies when compared to non-infected mice. The aggravation of arthritis by periodontitis was accompanied by increased TNF and IL-17 production and articular neutrophil infiltration, whereas arthritis aggravation and changes in neutrophil infiltration were absent in IL-17RA-deficient mice. CONCLUSION The effects of P. gingivalis-induced periodontitis on arthritis are dependent on Th17 expansion and IL-17RA signalling, which lead to increased neutrophil infiltration into the joints.
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Affiliation(s)
- Sabrina G de Aquino
- Department of Diagnosis and Oral Surgery, School of Dentistry at Araraquara, Univ. Estadual Paulista - UNESP, Araraquara, Brazil.,Department of Clinical and Social Dentistry, Health Science Center, Federal University of Paraíba, João Pessoa, Brazil
| | - Jhimmy Talbot
- Department of Pharmacology, School of Medicine of Ribeirao Preto, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Fabiane Sônego
- Department of Pharmacology, School of Medicine of Ribeirao Preto, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Walter M Turato
- Department of Pharmacology, School of Medicine of Ribeirao Preto, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Renata Grespan
- Department of Pharmacology, School of Medicine of Ribeirao Preto, University of Sao Paulo, Ribeirão Preto, Brazil.,Department of Physiology, Biological and Health Science Center, Federal University of Sergipe, Aracajú, Brazil
| | - Mario J Avila-Campos
- Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Fernando Q Cunha
- Department of Pharmacology, School of Medicine of Ribeirao Preto, University of Sao Paulo, Ribeirão Preto, Brazil
| | - Joni A Cirelli
- Department of Diagnosis and Oral Surgery, School of Dentistry at Araraquara, Univ. Estadual Paulista - UNESP, Araraquara, Brazil
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22
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Bassi GS, Dias DPM, Franchin M, Talbot J, Reis DG, Menezes GB, Castania JA, Garcia-Cairasco N, Resstel LBM, Salgado HC, Cunha FQ, Cunha TM, Ulloa L, Kanashiro A. Modulation of experimental arthritis by vagal sensory and central brain stimulation. Brain Behav Immun 2017; 64:330-343. [PMID: 28392428 PMCID: PMC6330674 DOI: 10.1016/j.bbi.2017.04.003] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 02/25/2017] [Accepted: 04/04/2017] [Indexed: 12/20/2022] Open
Abstract
Articular inflammation is a major clinical burden in multiple inflammatory diseases, especially in rheumatoid arthritis. Biological anti-rheumatic drug therapies are expensive and increase the risk of systemic immunosuppression, infections, and malignancies. Here, we report that vagus nerve stimulation controls arthritic joint inflammation by inducing local regulation of innate immune response. Most of the previous studies of neuromodulation focused on vagal regulation of inflammation via the efferent peripheral pathway toward the viscera. Here, we report that vagal stimulation modulates arthritic joint inflammation through a novel "afferent" pathway mediated by the locus coeruleus (LC) of the central nervous system. Afferent vagal stimulation activates two sympatho-excitatory brain areas: the paraventricular hypothalamic nucleus (PVN) and the LC. The integrity of the LC, but not that of the PVN, is critical for vagal control of arthritic joint inflammation. Afferent vagal stimulation suppresses articular inflammation in the ipsilateral, but not in the contralateral knee to the hemispheric LC lesion. Central stimulation is followed by subsequent activation of joint sympathetic nerve terminals inducing articular norepinephrine release. Selective adrenergic beta-blockers prevent the effects of articular norepinephrine and thereby abrogate vagal control of arthritic joint inflammation. These results reveals a novel neuro-immune brain map with afferent vagal signals controlling side-specific articular inflammation through specific inflammatory-processing brain centers and joint sympathetic innervations.
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Affiliation(s)
- Gabriel Shimizu Bassi
- Department of Immunology, Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, SP, Brazil.
| | | | - Marcelo Franchin
- Department of Pharmacology, Ribeirão Preto Medical School – University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Jhimmy Talbot
- Department of Pharmacology, Ribeirão Preto Medical School – University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Daniel Gustavo Reis
- Department of Pharmacology, Ribeirão Preto Medical School – University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Gustavo Batista Menezes
- Center for Gastrointestinal Biology, Department of Morphology, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Jaci Airton Castania
- Department of Physiology, Ribeirão Preto Medical School – University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Norberto Garcia-Cairasco
- Department of Physiology, Ribeirão Preto Medical School – University of São Paulo, Ribeirão Preto, SP, Brazil
| | | | - Helio Cesar Salgado
- Department of Physiology, Ribeirão Preto Medical School – University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Fernando Queiró Cunha
- Department of Pharmacology, Ribeirão Preto Medical School – University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Thiago Mattar Cunha
- Department of Pharmacology, Ribeirão Preto Medical School – University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Luis Ulloa
- Department of Surgery, Center of Immunology & Inflammation, Rutgers-New Jersey Medical School, Rutgers University, Newark, NJ 07101, USA.
| | - Alexandre Kanashiro
- Department of Pharmacology, Ribeirão Preto Medical School - University of São Paulo, Ribeirão Preto, SP, Brazil; Department of Physiological Sciences, Federal University of São Carlos, São Carlos, SP, Brazil.
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Abstract
We study the "color dynamics" of a hard-disk fluid confined in an annulus, as well as the corresponding hard-sphere system in three dimensions, using event-driven simulation in order to explore the effect of confinement and self-crowding on the search for targets. We compute the mean first-passage times (MFPTs) of red particles transiting from the outer to the inner boundary as well as those of blue particles passing from the inner to the outer boundary for different packing fractions and geometries. In the steady state the reaction rate, defined as the rate of collision of red particles with the inner boundary, is inversely proportional to the sum of the MFPTs. The reaction rate is wall mediated (ballistic) at low densities and diffusion controlled at higher densities and displays a maximum at intermediate densities. At moderate to high densities, the presence of layering has a strong influence on the search process. The numerical results for the reaction rate and MFPTs are compared with a ballistic model at low densities and a Smoluchowski approach with uniform diffusivities at higher densities. We discuss the reasons for the limited validity of the theoretical approaches. The maximum in the reaction rate is qualitatively well rendered by a Bosanquet-like approach that interpolates between the two regimes. Finally, we compute the position-dependent diffusivity from the MFPTs and observe that it is out of phase with the radial density.
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Affiliation(s)
- C Antoine
- Laboratoire de Physique Théorique de la Matière Condensée, UPMC, CNRS UMR 7600, Sorbonne Universités, 4 place Jussieu, 75252 Paris Cedex 05, France
| | - J Talbot
- Laboratoire de Physique Théorique de la Matière Condensée, UPMC, CNRS UMR 7600, Sorbonne Universités, 4 place Jussieu, 75252 Paris Cedex 05, France
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Kanashiro A, Talbot J, Peres RS, Pinto LG, Bassi GS, Cunha TM, Cunha FQ. Neutrophil Recruitment and Articular Hyperalgesia in Antigen-Induced Arthritis are Modulated by the Cholinergic Anti-Inflammatory Pathway. Basic Clin Pharmacol Toxicol 2016; 119:453-457. [DOI: 10.1111/bcpt.12611] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Accepted: 04/11/2016] [Indexed: 12/26/2022]
Affiliation(s)
- Alexandre Kanashiro
- Department of Pharmacology; Ribeirão Preto Medical School; University of São Paulo; Ribeirão Preto SP Brazil
| | - Jhimmy Talbot
- Department of Pharmacology; Ribeirão Preto Medical School; University of São Paulo; Ribeirão Preto SP Brazil
| | - Raphael S. Peres
- Department of Immunology; Ribeirão Preto Medical School; University of São Paulo; Ribeirão Preto SP Brazil
| | - Larissa G. Pinto
- Department of Pharmacology; Ribeirão Preto Medical School; University of São Paulo; Ribeirão Preto SP Brazil
| | - Gabriel S. Bassi
- Department of Immunology; Ribeirão Preto Medical School; University of São Paulo; Ribeirão Preto SP Brazil
| | - Thiago M. Cunha
- Department of Pharmacology; Ribeirão Preto Medical School; University of São Paulo; Ribeirão Preto SP Brazil
| | - Fernando Q. Cunha
- Department of Pharmacology; Ribeirão Preto Medical School; University of São Paulo; Ribeirão Preto SP Brazil
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Abstract
Although there are many theoretical studies of the mean first-passage time (MFPT), most neglect the diffusive heterogeneity of real systems. We present exact analytical expressions for the MFPT and residence times of a pointlike particle diffusing in a spherically symmetric d-dimensional heterogeneous system composed of two concentric media with different diffusion coefficients with an absorbing inner boundary (target) and a reflecting outer boundary. By varying the convention, e.g., Itō, Stratonovich, or isothermal, chosen to interpret the overdamped Langevin equation with multiplicative noise describing the diffusion process, we find different predictions and counterintuitive results for the residence time in the outer region and hence for the MFPT, while the residence time in the inner region is independent of the convention. This convention dependence of residence times and the MFPT could provide insights about the heterogeneous diffusion in a cell or in a tumor, or for animal and insect searches inside their home range.
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Affiliation(s)
- G Vaccario
- Laboratoire de Physique Théorique de la Matiére Condensée, UPMC, CNRS UMR 7600, Sorbonne Universités, 4, Place Jussieu, 75252 Paris, Cedex 05, France
| | - C Antoine
- Laboratoire de Physique Théorique de la Matiére Condensée, UPMC, CNRS UMR 7600, Sorbonne Universités, 4, Place Jussieu, 75252 Paris, Cedex 05, France
| | - J Talbot
- Laboratoire de Physique Théorique de la Matiére Condensée, UPMC, CNRS UMR 7600, Sorbonne Universités, 4, Place Jussieu, 75252 Paris, Cedex 05, France
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Au I, Ciurlionis L, Campbell N, Talbot J. Validation of Model Based Patient Specific Quality Assurance (QA) Using Introduced Intentional Errors. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.2137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Abstract
Flow in channel networks may involve a redistribution of flux following the blockage or failure of an individual link. Here we consider a simplified model consisting of N(c) parallel channels conveying a particulate flux. Particles enter these channels according to a homogeneous Poisson process and an individual channel blocks if more than N particles are simultaneously present. The behavior of the composite system depends strongly on how the flux of entering particles is redistributed following a blockage. We consider two cases. In the first, the intensity on each open channel remains constant while in the second the total intensity is evenly redistributed over the open channels. We obtain exact results for arbitrary N(c) and N for a system of independent channels and for arbitrary N(c) and N=1 for coupled channels. For N>1 we present approximate analytical as well as numerical results. Independent channels block at a decreasing rate due to a simple combinatorial effect, while for coupled channels the interval between successive blockages remains constant for N=1 but decreases for N>1. This accelerating cascade is due to the nonlinear dependence of the mean blocking time of a single channel on the entering particle flux that more than compensates for the decrease in the number of active channels.
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Affiliation(s)
- C Barré
- Laboratoire de Physique Théorique de la Matière Condensée, UPMC, CNRS UMR 7600, Sorbonne Universités, 4, place Jussieu, 75252 Paris Cedex 05, France
| | - J Talbot
- Laboratoire de Physique Théorique de la Matière Condensée, UPMC, CNRS UMR 7600, Sorbonne Universités, 4, place Jussieu, 75252 Paris Cedex 05, France
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Bassi GS, Brognara F, Castania JA, Talbot J, Cunha TM, Cunha FQ, Ulloa L, Kanashiro A, Dias DPM, Salgado HC. Baroreflex activation in conscious rats modulates the joint inflammatory response via sympathetic function. Brain Behav Immun 2015; 49:140-7. [PMID: 25986215 PMCID: PMC7023897 DOI: 10.1016/j.bbi.2015.05.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2015] [Revised: 05/07/2015] [Accepted: 05/10/2015] [Indexed: 12/19/2022] Open
Abstract
The baroreflex is a critical physiological mechanism controlling cardiovascular function by modulating both the sympathetic and parasympathetic activities. Here, we report that electrical activation of the baroreflex attenuates joint inflammation in experimental arthritis induced by the administration of zymosan into the femorotibial cavity. Baroreflex activation combined with lumbar sympathectomy, adrenalectomy, celiac subdiaphragmatic vagotomy or splenectomy dissected the mechanisms involved in the inflammatory modulation, highlighting the role played by sympathetic inhibition in the attenuation of joint inflammation. From the immunological standpoint, baroreflex activation attenuates neutrophil migration and the synovial levels of inflammatory cytokines including TNF, IL-1β and IL-6, but does not affect the levels of the anti-inflammatory cytokine IL-10. The anti-inflammatory effects of the baroreflex system are not mediated by IL-10, the vagus nerve, adrenal glands or the spleen, but by the inhibition of the sympathetic drive to the knee. These results reveal a novel physiological neuronal network controlling peripheral local inflammation.
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Affiliation(s)
- Gabriel S. Bassi
- Departments of Immunology from the Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Fernanda Brognara
- Departments of Physiology from the Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Jaci A. Castania
- Departments of Physiology from the Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Jhimmy Talbot
- Departments of Pharmacology from the Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Thiago M. Cunha
- Departments of Immunology from the Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil,Departments of Pharmacology from the Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Fernando Q. Cunha
- Departments of Immunology from the Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil,Departments of Pharmacology from the Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Luis Ulloa
- Rutgers University – New Jersey Medical School, Newark, NJ 07103, USA
| | - Alexandre Kanashiro
- Departments of Pharmacology from the Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Daniel P. Martins Dias
- Departments of Physiology from the Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Helio C. Salgado
- Departments of Physiology from the Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil,Corresponding author at: Department of Physiology, Ribeirão Preto Medical School, University of São Paulo, Av. Bandeirantes 3900, 14049-900 Ribeirão Preto, SP, Brazil. Tel.: +55 16 33153201. (H.C. Salgado)
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Talbot J, Bianchini FJ, Nascimento DC, Oliveira RDR, Souto FO, Pinto LG, Peres RS, Silva JR, Almeida SCL, Louzada-Junior P, Cunha TM, Cunha FQ, Alves-Filho JC. CCR2 Expression in Neutrophils Plays a Critical Role in Their Migration Into the Joints in Rheumatoid Arthritis. Arthritis Rheumatol 2015; 67:1751-9. [PMID: 25779331 DOI: 10.1002/art.39117] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Accepted: 03/12/2015] [Indexed: 01/07/2023]
Abstract
OBJECTIVE Infiltration of neutrophils into the joints plays an important role in bone erosion and articular destruction in rheumatoid arthritis (RA). Neutrophil trafficking during inflammation is a process that involves activation of chemotactic receptors. Recent findings suggest that changes in chemotactic receptor patterns could occur in neutrophils under certain inflammatory conditions. The aim of this study was to evaluate the gain of responsiveness of neutrophils to CCL2 in RA patients and to assess the role of CCL2 in driving neutrophil infiltration into the joints. METHODS Neutrophils were purified from the peripheral blood of patients with RA or from mice with antigen-induced arthritis (AIA). Expression of CCR2 was evaluated using polymerase chain reaction, flow cytometry, and immunofluorescence analyses. In vitro chemotaxis to CCL2 was assayed to evaluate the functional significance of de novo CCR2 expression. The murine AIA model was used to evaluate the in vivo role of CCR2 in neutrophil infiltration into the joints. RESULTS High CCR2 expression and responsiveness to CCL2 were observed in neutrophils from the blood of patients with early RA and in neutrophils from the blood and bone marrow of mice with AIA. Genetic deficiency or pharmacologic inhibition of CCR2 protected against the infiltration of neutrophils into the joints. This protection was not associated with an impairment of the neutrophil chemotactic ability or CXC chemokine production in the joints. Moreover, adoptive transfer of wild-type mouse neutrophils to CCR2-deficient mice restored neutrophil infiltration and the articular mechanical hyperalgesia associated with joint inflammation. CONCLUSION These findings suggest that CCR2 is directly involved in the detrimental infiltration of neutrophils into the joints in patients with RA, showing a new inflammatory role of CCR2 during RA flares or active disease.
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Affiliation(s)
- Jhimmy Talbot
- University of São Paulo, Ribeirão Preto Medical School, Ribeirao Preto, Sao Paulo, Brazil
| | - Francine J Bianchini
- University of São Paulo, Ribeirão Preto Medical School, Ribeirao Preto, Sao Paulo, Brazil
| | - Danilele C Nascimento
- University of São Paulo, Ribeirão Preto Medical School, Ribeirao Preto, Sao Paulo, Brazil
| | - Rene D R Oliveira
- University of São Paulo, Ribeirão Preto Medical School, Ribeirao Preto, Sao Paulo, Brazil
| | - Fabricio O Souto
- University of São Paulo, Ribeirão Preto Medical School, Ribeirao Preto, Sao Paulo, Brazil
| | - Larissa G Pinto
- University of São Paulo, Ribeirão Preto Medical School, Ribeirao Preto, Sao Paulo, Brazil
| | - Raphael S Peres
- University of São Paulo, Ribeirão Preto Medical School, Ribeirao Preto, Sao Paulo, Brazil
| | - Jaqueline R Silva
- University of São Paulo, Ribeirão Preto Medical School, Ribeirao Preto, Sao Paulo, Brazil
| | - Sergio C L Almeida
- University of São Paulo, Ribeirão Preto Medical School, Ribeirao Preto, Sao Paulo, Brazil
| | - Paulo Louzada-Junior
- University of São Paulo, Ribeirão Preto Medical School, Ribeirao Preto, Sao Paulo, Brazil
| | - Thiago M Cunha
- University of São Paulo, Ribeirão Preto Medical School, Ribeirao Preto, Sao Paulo, Brazil
| | - Fernando Q Cunha
- University of São Paulo, Ribeirão Preto Medical School, Ribeirao Preto, Sao Paulo, Brazil
| | - Jose C Alves-Filho
- University of São Paulo, Ribeirão Preto Medical School, Ribeirao Preto, Sao Paulo, Brazil
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Pinto LG, Talbot J, Peres RS, Franca RF, Ferreira SH, Ryffel B, Aves-Filho JCF, Figueiredo F, Cunha TM, Cunha FQ. Joint production of IL-22 participates in the initial phase of antigen-induced arthritis through IL-1β production. Arthritis Res Ther 2015; 17:235. [PMID: 26330334 PMCID: PMC4556214 DOI: 10.1186/s13075-015-0759-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 08/18/2015] [Indexed: 12/29/2022] Open
Abstract
INTRODUCTION Rheumatoid arthritis (RA) is a chronic autoimmune disease characterized by neutrophil articular infiltration, joint pain and the progressive destruction of cartilage and bone. IL-22 is a key effector molecule that plays a critical role in autoimmune diseases. However, the function of IL-22 in the pathogenesis of RA remains controversial. In this study, we investigated the role of IL-22 in the early phase of antigen-induced arthritis (AIA) in mice. METHODS AIA was induced in C57BL/6, IL-22(-/-), ASC(-/-) and IL-1R1(-/-) immunized mice challenged intra-articularly with methylated bovine serum albumin (mBSA). Expression of IL-22 in synovial membranes was determined by RT-PCR. Articular hypernociception was evaluated using an electronic von Frey. Neutrophil recruitment and histopathological analyses were assessed in inflamed knee joint. Joint levels of inflammatory mediators and mBSA-specific IgG concentration in the serum were measured by ELISA. RESULTS The IL-22 mRNA expression and protein levels in synovial tissue were increased during the onset of AIA. In addition, pharmacological inhibition (anti-IL-22 antibody) and genetic deficiency (IL-22(-/-) mice) reduced articular pain and neutrophil migration in arthritic mice. Consistent with these findings, recombinant IL-22 joint administration promoted articular inflammation per se in WT mice, restoring joint nociception and neutrophil infiltration in IL-22(-/-) mice. Moreover, IL-22-deficient mice showed reduced synovitis (inflammatory cell influx) and lower joint IL-1β levels, whereas the production of IL-17, MCP-1/CCL2, and KC/CXCL1 and the humoral immune response were similar, compared with WT mice. Corroborating these results, the exogenous administration of IL-22 into the joints induced IL-1β production in WT mice and reestablished IL-1β production in IL-22(-/-) mice challenged with mBSA. Additionally, IL-1R1(-/-) mice showed attenuated inflammatory features induced by mBSA or IL-22 challenge. Articular nociception and neutrophil migration induced by IL-22 were also reduced in ASC(-/-) mice. CONCLUSIONS These results suggest that IL-22 plays a pro-inflammatory/pathogenic role in the onset of AIA through an ASC-dependent stimulation of IL-1β production.
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Affiliation(s)
- Larissa G Pinto
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Avenida Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil.
| | - Jhimmy Talbot
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Avenida Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil.
| | - Raphael S Peres
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Avenida Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil.
| | - Rafael F Franca
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Avenida Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil.
- Present Address: Aggeu Magalhaes Research Center, Oswaldo Cruz Foundation - FIOCRUZ, Avenida Profesor Moreaes Rego s/n, Recife, 50740-465, Brazil.
| | - Sérgio H Ferreira
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Avenida Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil.
| | - Bernhard Ryffel
- Université d'Orléans and CNRS, UMR 7355 Molecular and Experimental Immunology and Neurogenetics, 3b rue de la Férollerie, 45071, Orléans, France.
| | - José Carlos F Aves-Filho
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Avenida Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil.
| | - Florêncio Figueiredo
- Laboratory of Pathology, School of Medicine, University of Brasilia, Campus Universitário Darcy Ribeiro, Brasilia, 70910-900, 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.
| | - Fernando Q Cunha
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Avenida Bandeirantes, 3900, Ribeirão Preto, São Paulo, 14049-900, Brazil.
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Barré C, Talbot J, Viot P, Angelani L, Gabrielli A. Generalized model of blockage in particulate flow limited by channel carrying capacity. Phys Rev E Stat Nonlin Soft Matter Phys 2015; 92:032141. [PMID: 26465460 DOI: 10.1103/physreve.92.032141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Indexed: 06/05/2023]
Abstract
We investigate stochastic models of particles entering a channel with a random time distribution. When the number of particles present in the channel exceeds a critical value N, a blockage occurs and the particle flux is definitively interrupted. By introducing an integral representation of the n-particle survival probabilities, we obtain exact expressions for the survival probability, the distribution of the number of particles that pass before failure, the instantaneous flux of exiting particles, and their time correlation. We generalize previous results for N=2 to an arbitrary distribution of entry times and obtain exact solutions for N=3 for a Poisson distribution and partial results for N≥4.
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Affiliation(s)
- C Barré
- Laboratoire de Physique Théorique de la Matière Condensée, UPMC, CNRS UMR 7600, Sorbonne Universités, 4 Place Jussieu, 75252 Paris Cedex 05, France
| | - J Talbot
- Laboratoire de Physique Théorique de la Matière Condensée, UPMC, CNRS UMR 7600, Sorbonne Universités, 4 Place Jussieu, 75252 Paris Cedex 05, France
| | - P Viot
- Laboratoire de Physique Théorique de la Matière Condensée, UPMC, CNRS UMR 7600, Sorbonne Universités, 4 Place Jussieu, 75252 Paris Cedex 05, France
| | - L Angelani
- Istituto dei Sistemi Complessi (ISC) - CNR, UOS "Sapienza," Department of Physics, University "Sapienza" of Rome, Piazzale Aldo Moro 2, 00185 Rome, Italy
| | - A Gabrielli
- Istituto dei Sistemi Complessi (ISC) - CNR, UOS "Sapienza," Department of Physics, University "Sapienza" of Rome, Piazzale Aldo Moro 2, 00185 Rome, Italy
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Lapworth DJ, Baran N, Stuart ME, Manamsa K, Talbot J. Persistent and emerging micro-organic contaminants in Chalk groundwater of England and France. Environ Pollut 2015; 203:214-225. [PMID: 25882715 DOI: 10.1016/j.envpol.2015.02.030] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 02/23/2015] [Accepted: 02/24/2015] [Indexed: 05/25/2023]
Abstract
The Chalk aquifer of Northern Europe is an internationally important source of drinking water and sustains baseflow for surface water ecosystems. The areal distribution of microorganic (MO) contaminants, particularly non-regulated emerging MOs, in this aquifer is poorly understood. This study presents results from a reconnaissance survey of MOs in Chalk groundwater, including pharmaceuticals, personal care products and pesticides and their transformation products, conducted across the major Chalk aquifers of England and France. Data from a total of 345 sites collected during 2011 were included in this study to provide a representative baseline assessment of MO occurrence in groundwater. A suite of 42 MOs were analysed for at each site including industrial compounds (n=16), pesticides (n=14) and pharmaceuticals, personal care and lifestyle products (n=12). Occurrence data is evaluated in relation to land use, aquifer exposure, well depth and depth to groundwater to provide an understanding of vulnerable groundwater settings.
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Affiliation(s)
- D J Lapworth
- British Geological Survey, Maclean Building, Wallingford, Oxfordshire, OX10 8BB, UK.
| | - N Baran
- Bureau de Recherches Géologiques et Minières, 3 Avenue Claude Guillemin, BP 6009, 45060 Orléans, Cedex 2, France
| | - M E Stuart
- British Geological Survey, Maclean Building, Wallingford, Oxfordshire, OX10 8BB, UK
| | - K Manamsa
- British Geological Survey, Maclean Building, Wallingford, Oxfordshire, OX10 8BB, UK
| | - J Talbot
- British Geological Survey, Maclean Building, Wallingford, Oxfordshire, OX10 8BB, UK
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34
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Franca RFO, Vieira SM, Talbot J, Peres RS, Pinto LG, Zamboni DS, Louzada-Junior P, Cunha FQ, Cunha TM. Expression and activity ofNOD1andNOD2/RIPK2signalling in mononuclear cells from patients with rheumatoid arthritis. Scand J Rheumatol 2015. [DOI: 10.3109/03009742.2015.1047403] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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35
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Souza GR, Cunha TM, Silva RL, Lotufo CM, Verri WA, Funez MI, Villarreal CF, Talbot J, Sousa LP, Parada CA, Cunha FQ, Ferreira SH. Involvement of nuclear factor kappa B in the maintenance of persistent inflammatory hypernociception. Pharmacol Biochem Behav 2015; 134:49-56. [PMID: 25902407 DOI: 10.1016/j.pbb.2015.04.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 04/07/2015] [Accepted: 04/15/2015] [Indexed: 01/09/2023]
Abstract
The pathophysiology of chronic inflammatory pain remains poorly understood. In this context, we developed an experimental model in which successive daily injection of prostaglandin E2 (PGE2) for 14days into rat hind paws produces a persistent state of hypernociception (i.e. decrease in mechanical nociceptive threshold). This state persists for more than 30days after discontinuing PGE2 injection. In the present study, we investigated the participation of nuclear factor kappa B (NF-κB), in the maintenance of this process. Mechanical hypernociception was evaluated using the electronic von Frey test. Activation of NF-κB signaling was measured through the determination of NF-κB p65 subunit translocation to the nucleus of dorsal root ganglion neurons (DRG) by immunofluorescence and western blotting. Herein, we detected an increase in NF-κB p65 subunit translocation to the nucleus of DRG neurons along with persistent inflammatory hypernociception compared with controls. Intrathecal treatment with either dexamethasone or PDTC (NF-κB activation inhibitor) after ending of the induction phase of the persistent inflammatory hypernociception, curtailed the hypernociception period as well as reducing NF-κB p65 subunit translocation. Treatment with antisense oligonucleotides against the NF-κB p65 subunit for 5 consecutive days also reduced persistent inflammatory hypernociception. Inhibition of PKA and PKCε reduced persistent inflammatory hypernociception, which was associated with inhibition of NF-κB p65 subunit translocation. Together these results suggest that peripheral activation of NF-κB by PKA and PKC in primary sensory neurons plays an important role in maintaining persistent inflammatory pain.
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Affiliation(s)
- Guilherme R Souza
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Thiago M Cunha
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Rangel L Silva
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Celina M Lotufo
- Instituto de Ciências Biomédicas, Federal University of Uberlandia, Umuarama, MG 38405-320 Uberlândia, Brazil
| | - Waldiceu A Verri
- Departamento de Ciencias Patologicas, Universidade Estadual de Londrina, Londrina, Parana, Brazil
| | - Mani I Funez
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Christiane F Villarreal
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Jhimmy Talbot
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Lirlândia P Sousa
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Carlos A Parada
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil
| | - Fernando Q Cunha
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil.
| | - Sergio H Ferreira
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Ribeirao Preto, Sao Paulo, Brazil.
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36
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Brienen RJW, Phillips OL, Feldpausch TR, Gloor E, Baker TR, Lloyd J, Lopez-Gonzalez G, Monteagudo-Mendoza A, Malhi Y, Lewis SL, Vásquez Martinez R, Alexiades M, Álvarez Dávila E, Alvarez-Loayza P, Andrade A, Aragão LEOC, Araujo-Murakami A, Arets EJMM, Arroyo L, Aymard C GA, Bánki OS, Baraloto C, Barroso J, Bonal D, Boot RGA, Camargo JLC, Castilho CV, Chama V, Chao KJ, Chave J, Comiskey JA, Cornejo Valverde F, da Costa L, de Oliveira EA, Di Fiore A, Erwin TL, Fauset S, Forsthofer M, Galbraith DR, Grahame ES, Groot N, Hérault B, Higuchi N, Honorio Coronado EN, Keeling H, Killeen TJ, Laurance WF, Laurance S, Licona J, Magnussen WE, Marimon BS, Marimon-Junior BH, Mendoza C, Neill DA, Nogueira EM, Núñez P, Pallqui Camacho NC, Parada A, Pardo-Molina G, Peacock J, Peña-Claros M, Pickavance GC, Pitman NCA, Poorter L, Prieto A, Quesada CA, Ramírez F, Ramírez-Angulo H, Restrepo Z, Roopsind A, Rudas A, Salomão RP, Schwarz M, Silva N, Silva-Espejo JE, Silveira M, Stropp J, Talbot J, ter Steege H, Teran-Aguilar J, Terborgh J, Thomas-Caesar R, Toledo M, Torello-Raventos M, Umetsu RK, van der Heijden GMF, van der Hout P, Guimarães Vieira IC, Vieira SA, Vilanova E, Vos VA, Zagt RJ. Long-term decline of the Amazon carbon sink. Nature 2015; 519:344-8. [PMID: 25788097 DOI: 10.1038/nature14283] [Citation(s) in RCA: 336] [Impact Index Per Article: 37.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2014] [Accepted: 02/04/2015] [Indexed: 11/09/2022]
Abstract
Atmospheric carbon dioxide records indicate that the land surface has acted as a strong global carbon sink over recent decades, with a substantial fraction of this sink probably located in the tropics, particularly in the Amazon. Nevertheless, it is unclear how the terrestrial carbon sink will evolve as climate and atmospheric composition continue to change. Here we analyse the historical evolution of the biomass dynamics of the Amazon rainforest over three decades using a distributed network of 321 plots. While this analysis confirms that Amazon forests have acted as a long-term net biomass sink, we find a long-term decreasing trend of carbon accumulation. Rates of net increase in above-ground biomass declined by one-third during the past decade compared to the 1990s. This is a consequence of growth rate increases levelling off recently, while biomass mortality persistently increased throughout, leading to a shortening of carbon residence times. Potential drivers for the mortality increase include greater climate variability, and feedbacks of faster growth on mortality, resulting in shortened tree longevity. The observed decline of the Amazon sink diverges markedly from the recent increase in terrestrial carbon uptake at the global scale, and is contrary to expectations based on models.
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Affiliation(s)
- R J W Brienen
- School of Geography, University of Leeds, Leeds LS2 9JT, UK
| | - O L Phillips
- School of Geography, University of Leeds, Leeds LS2 9JT, UK
| | - T R Feldpausch
- 1] School of Geography, University of Leeds, Leeds LS2 9JT, UK. [2] Geography, College of Life and Environmental Sciences, University of Exeter, Rennes Drive, Exeter EX4 4RJ, UK
| | - E Gloor
- School of Geography, University of Leeds, Leeds LS2 9JT, UK
| | - T R Baker
- School of Geography, University of Leeds, Leeds LS2 9JT, UK
| | - J Lloyd
- 1] Department of Life Sciences, Imperial College London, Silwood Park Campus, Buckhurst Road, Ascot, Berkshire SL5 7PY, UK. [2] School of Marine and Tropical Biology, James Cook University, Cairns, 4870 Queenland, Australia
| | | | - A Monteagudo-Mendoza
- Jardín Botánico de Missouri, Prolongacion Bolognesi Mz.e, Lote 6, Oxapampa, Pasco, Peru
| | - Y Malhi
- Environmental Change Institute, School of Geography and the Environment, University of Oxford, Oxford OX1 3QK, UK
| | - S L Lewis
- 1] School of Geography, University of Leeds, Leeds LS2 9JT, UK. [2] Department of Geography, University College London, Pearson Building, Gower Street, London WC1E 6BT, UK
| | - R Vásquez Martinez
- Jardín Botánico de Missouri, Prolongacion Bolognesi Mz.e, Lote 6, Oxapampa, Pasco, Peru
| | - M Alexiades
- School of Anthropology and Conservation, Marlowe Building, University of Kent, Canterbury CT1 3EH, UK
| | - E Álvarez Dávila
- Servicios Ecosistemicos y Cambio Climático, Jardín Botánico de Medellín, Calle 73 no. 51 D-14, C.P. 050010, Medellín, Colombia
| | - P Alvarez-Loayza
- Center for Tropical Conservation, Duke University, Box 90381, Durham, North Carolina 27708, USA
| | - A Andrade
- Biological Dynamics of Forest Fragment Project (INPA &STRI), C.P. 478, Manaus AM 69011-970, Brazil
| | - L E O C Aragão
- 1] Geography, College of Life and Environmental Sciences, University of Exeter, Rennes Drive, Exeter EX4 4RJ, UK. [2] National Institute for Space Research (INPE), Av. Dos Astronautas, 1758, São José dos Campos, São Paulo 12227-010, Brazil
| | - A Araujo-Murakami
- Museo de Historia Natural Noel Kempff Mercado, Universidad Autonoma Gabriel Rene Moreno, Casilla 2489, Av. Irala 565, Santa Cruz, Bolivia
| | - E J M M Arets
- Alterra, Wageningen University and Research Centre, PO Box 47, 6700 AA Wageningen, The Netherlands
| | - L Arroyo
- Museo de Historia Natural Noel Kempff Mercado, Universidad Autonoma Gabriel Rene Moreno, Casilla 2489, Av. Irala 565, Santa Cruz, Bolivia
| | - G A Aymard C
- UNELLEZ-Guanare, Programa de Ciencias del Agro y el Mar, Herbario Universitario (PORT), Mesa de Cavacas, Estado Portuguesa, 3350 Venezuela
| | - O S Bánki
- Biodiversiteit en Ecosysteem Dynamica, University of Amsterdam, Postbus 94248, 1090 GE Amsterdam, The Netherlands
| | - C Baraloto
- 1] Institut National de la Recherche Agronomique, UMR EcoFoG, Campus Agronomique, 97310 Kourou, French Guiana. [2] International Center for Tropical Botany, Department of Biological Sciences, Florida International University, Miami, Florida 33199, USA
| | - J Barroso
- Universidade Federal do Acre, Campus de Cruzeiro do Sul, Rio Branco, Brazil
| | - D Bonal
- INRA, UMR 1137 ''Ecologie et Ecophysiologie Forestiere'' 54280 Champenoux, France
| | - R G A Boot
- School of Geography, University of Leeds, Leeds LS2 9JT, UK
| | - J L C Camargo
- Biological Dynamics of Forest Fragment Project (INPA &STRI), C.P. 478, Manaus AM 69011-970, Brazil
| | - C V Castilho
- Embrapa Roraima, Caixa Postal 133, Boa Vista, RR, CEP 69301-970, Brazil
| | - V Chama
- Universidad Nacional San Antonio Abad del Cusco, Av. de la Cultura N° 733, Cusco, Peru
| | - K J Chao
- 1] School of Geography, University of Leeds, Leeds LS2 9JT, UK. [2] International Master Program of Agriculture, College of Agriculture and Natural Resources, National Chung Hsing University, Taichung 40227, Taiwan
| | - J Chave
- Université Paul Sabatier CNRS, UMR 5174 Evolution et Diversité Biologique, Bâtiment 4R1, 31062 Toulouse, France
| | - J A Comiskey
- Northeast Region Inventory and Monitoring Program, National Park Service, 120 Chatham Lane, Fredericksburg, Virginia 22405, USA
| | - F Cornejo Valverde
- Andes to Amazon Biodiversity Program, Puerto Maldonado, Madre de Dios, Peru
| | - L da Costa
- Universidade Federal do Para, Centro de Geociencias, Belem, CEP 66017-970 Para, Brazil
| | - E A de Oliveira
- Universidade do Estado de Mato Grosso, Campus de Nova Xavantina, Caixa Postal 08, CEP 78.690-000, Nova Xavantina MT, Brazil
| | - A Di Fiore
- Department of Anthropology, University of Texas at Austin, SAC Room 5.150, 2201 Speedway Stop C3200, Austin, Texas 78712, USA
| | - T L Erwin
- Department of Entomology, Smithsonian Institution, PO Box 37012, MRC 187, Washington DC 20013-7012, USA
| | - S Fauset
- School of Geography, University of Leeds, Leeds LS2 9JT, UK
| | - M Forsthofer
- Universidade do Estado de Mato Grosso, Campus de Nova Xavantina, Caixa Postal 08, CEP 78.690-000, Nova Xavantina MT, Brazil
| | - D R Galbraith
- School of Geography, University of Leeds, Leeds LS2 9JT, UK
| | - E S Grahame
- School of Geography, University of Leeds, Leeds LS2 9JT, UK
| | - N Groot
- School of Geography, University of Leeds, Leeds LS2 9JT, UK
| | - B Hérault
- Cirad, UMR Ecologie des Forêts de Guyane, Campus Agronomique, 97310 Kourou, French Guiana
| | - N Higuchi
- Biological Dynamics of Forest Fragment Project (INPA &STRI), C.P. 478, Manaus AM 69011-970, Brazil
| | - E N Honorio Coronado
- 1] School of Geography, University of Leeds, Leeds LS2 9JT, UK. [2] Instituto de Investigaciones de la Amazonía Peruana, Av. A. José Quiñones km 2.5, Iquitos, Peru
| | - H Keeling
- School of Geography, University of Leeds, Leeds LS2 9JT, UK
| | - T J Killeen
- World Wildlife Fund, 1250 24th Street NW, Washington DC 20037, USA
| | - W F Laurance
- Centre for Tropical Environmental and Sustainability Science (TESS) and School of Marine and Environmental Sciences, James Cook University, Cairns, Queensland 4878, Australia
| | - S Laurance
- Centre for Tropical Environmental and Sustainability Science (TESS) and School of Marine and Environmental Sciences, James Cook University, Cairns, Queensland 4878, Australia
| | - J Licona
- Instituto Boliviano de Investigación Forestal, C.P. 6201, Santa Cruz de la Sierra, Bolivia
| | - W E Magnussen
- National Institute for Research in Amazonia (INPA), C.P. 478, Manaus, Amazonas, CEP 69011-970, Brazil
| | - B S Marimon
- Universidade do Estado de Mato Grosso, Campus de Nova Xavantina, Caixa Postal 08, CEP 78.690-000, Nova Xavantina MT, Brazil
| | - B H Marimon-Junior
- Universidade do Estado de Mato Grosso, Campus de Nova Xavantina, Caixa Postal 08, CEP 78.690-000, Nova Xavantina MT, Brazil
| | - C Mendoza
- 1] FOMABO, Manejo Forestal en las Tierras Tropicales de Bolivia, Sacta, Bolivia. [2] Escuela de Ciencias Forestales (ESFOR), Universidad Mayor de San Simón (UMSS), Sacta, Bolivia
| | - D A Neill
- Universidad Estatal Amazónica, Facultad de Ingeniería Ambiental, Paso lateral km 2 1/2 via Napo, Puyo, Pastaza, Ecuador
| | - E M Nogueira
- National Institute for Research in Amazonia (INPA), C.P. 2223, 69080-971, Manaus, Amazonas, Brazil
| | - P Núñez
- Universidad Nacional San Antonio Abad del Cusco, Av. de la Cultura N° 733, Cusco, Peru
| | - N C Pallqui Camacho
- Universidad Nacional San Antonio Abad del Cusco, Av. de la Cultura N° 733, Cusco, Peru
| | - A Parada
- Museo de Historia Natural Noel Kempff Mercado, Universidad Autonoma Gabriel Rene Moreno, Casilla 2489, Av. Irala 565, Santa Cruz, Bolivia
| | - G Pardo-Molina
- Universidad Autonoma del Beni, Campus Universitario, Av. Ejército Nacional, Riberalta, Beni, Bolivia
| | - J Peacock
- School of Geography, University of Leeds, Leeds LS2 9JT, UK
| | - M Peña-Claros
- 1] Instituto Boliviano de Investigación Forestal, C.P. 6201, Santa Cruz de la Sierra, Bolivia. [2] Forest Ecology and Forest Management Group, Wageningen University, PO Box 47, 6700 AA Wageningen, The Netherlands
| | - G C Pickavance
- School of Geography, University of Leeds, Leeds LS2 9JT, UK
| | - N C A Pitman
- 1] Center for Tropical Conservation, Duke University, Box 90381, Durham, North Carolina 27708, USA. [2] The Field Museum, 1400 South Lake Shore Drive, Chicago, Illinois 60605-2496, USA
| | - L Poorter
- Forest Ecology and Forest Management Group, Wageningen University, PO Box 47, 6700 AA Wageningen, The Netherlands
| | - A Prieto
- Universidad Nacional de la Amazonía Peruana, Iquitos, Loreto, Peru
| | - C A Quesada
- National Institute for Research in Amazonia (INPA), C.P. 2223, 69080-971, Manaus, Amazonas, Brazil
| | - F Ramírez
- Universidad Nacional de la Amazonía Peruana, Iquitos, Loreto, Peru
| | - H Ramírez-Angulo
- Instituto de Investigaciones para el Desarrollo Forestal (INDEFOR), Universidad de Los Andes, Facultad de Ciencias Forestales y Ambientales, Conjunto Forestal, C.P. 5101, Mérida, Venezuela
| | - Z Restrepo
- Servicios Ecosistemicos y Cambio Climático, Jardín Botánico de Medellín, Calle 73 no. 51 D-14, C.P. 050010, Medellín, Colombia
| | - A Roopsind
- Iwokrama International Centre for Rainforest Conservation and Development, 77 High Street Kingston, Georgetown, Guyana
| | - A Rudas
- School of Geography, University of Leeds, Leeds LS2 9JT, UK
| | - R P Salomão
- Museu Paraense Emilio Goeldi, Av. Magalhães Barata, 376 - São Braz, CEP 66040-170, Belém PA, Brazil
| | - M Schwarz
- School of Geography, University of Leeds, Leeds LS2 9JT, UK
| | - N Silva
- UFRA, Av. Presidente Tancredo Neves 2501, CEP 66.077-901, Belém, Pará, Brazil
| | - J E Silva-Espejo
- Universidad Nacional San Antonio Abad del Cusco, Av. de la Cultura N° 733, Cusco, Peru
| | - M Silveira
- Museu Universitário, Universidade Federal do Acre, Rio Branco AC 69910-900, Brazil
| | - J Stropp
- European Commission - DG Joint Research Centre, Institute for Environment and Sustainability, Via Enrico Fermi 274, 21010 Ispra, Italy
| | - J Talbot
- School of Geography, University of Leeds, Leeds LS2 9JT, UK
| | - H ter Steege
- 1] Naturalis Biodiversity Center, PO Box, 2300 RA, Leiden, The Netherlands. [2] Ecology and Biodiversity Group, Utrecht University, PO Box 80084, 3508 TB Utrecht, The Netherlands
| | - J Teran-Aguilar
- Museo de Historia Natural Alcide D'Orbigny, Av. Potosi no 1458, Cochabamba, Bolivia
| | - J Terborgh
- Center for Tropical Conservation, Duke University, Box 90381, Durham, North Carolina 27708, USA
| | - R Thomas-Caesar
- UFRA, Av. Presidente Tancredo Neves 2501, CEP 66.077-901, Belém, Pará, Brazil
| | - M Toledo
- Instituto Boliviano de Investigación Forestal, C.P. 6201, Santa Cruz de la Sierra, Bolivia
| | - M Torello-Raventos
- 1] School of Earth and Environmental Science, James Cook University, Cairns, Queensland 4870, Australia. [2] Centre for Tropical Environmental and Sustainability Science (TESS) and School of Marine and Tropical Biology, James Cook University, Cairns, Queensland 4878, Australia
| | - R K Umetsu
- Universidade do Estado de Mato Grosso, Campus de Nova Xavantina, Caixa Postal 08, CEP 78.690-000, Nova Xavantina MT, Brazil
| | - G M F van der Heijden
- 1] Northumbria University, School of Geography, Ellison Place, Newcastle upon Tyne, Newcastle NE1 8ST, UK. [2] University of Wisconsin, Milwaukee, Wisconsin 53202, USA. [3] Smithsonian Tropical Research Institute, Apartado Postal 0843-03092, Panamá, Republic of Panama
| | - P van der Hout
- Van der Hout Forestry Consulting, Jan Trooststraat 6, 3078 HP Rotterdam, The Netherlands
| | - I C Guimarães Vieira
- Museu Paraense Emilio Goeldi, Av. Magalhães Barata, 376 - São Braz, CEP 66040-170, Belém PA, Brazil
| | - S A Vieira
- Universidade Estadual de Campinas, NEPAM, Rua dos Flamboyants, 155- Cidade Universitária Zeferino Vaz, Campinas, CEP 13083-867, Sao Paulo, Brazil
| | - E Vilanova
- Instituto de Investigaciones para el Desarrollo Forestal (INDEFOR), Universidad de Los Andes, Facultad de Ciencias Forestales y Ambientales, Conjunto Forestal, C.P. 5101, Mérida, Venezuela
| | - V A Vos
- 1] Universidad Autonoma del Beni, Campus Universitario, Av. Ejército Nacional, Riberalta, Beni, Bolivia. [2] Centro de Investigación y Promoción del Campesinado, regional Norte Amazónico, C/ Nicanor Gonzalo Salvatierra N° 362, Casilla 16, Riberalta, Bolivia
| | - R J Zagt
- Tropenbos International, PO Box 232, 6700 AE Wageningen, The Netherlands
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Barrs VR, Ujvari B, Dhand NK, Peters IR, Talbot J, Johnson LR, Billen F, Martin P, Beatty JA, Belov K. Detection of Aspergillus-specific antibodies by agar gel double immunodiffusion and IgG ELISA in feline upper respiratory tract aspergillosis. Vet J 2014; 203:285-9. [PMID: 25634077 DOI: 10.1016/j.tvjl.2014.12.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 11/30/2014] [Accepted: 12/21/2014] [Indexed: 12/14/2022]
Abstract
Feline upper respiratory tract aspergillosis (URTA) is an emerging infectious disease. The aims of this study were: (1) to assess the diagnostic value of detection of Aspergillus-specific antibodies using an agar gel double immunodiffusion (AGID) assay and an indirect immunoglobulin G (IgG) ELISA; and (2) to determine if an aspergillin derived from mycelia of Aspergillus fumigatus, Aspergillus niger and Aspergillus flavus can be used to detect serum antibodies against cryptic Aspergillus spp. in Aspergillus section Fumigati. Sera from cats with URTA (group 1: n = 21) and two control groups (group 2: cats with other upper respiratory tract diseases, n = 25; group 3: healthy cats and cats with non-respiratory, non-fungal illness, n = 84) were tested. Isolates from cats with URTA comprised A. fumigatus (n = 5), A. flavus (n = 1) and four cryptic species: Aspergillus felis (n = 12), Aspergillus thermomutatus (Neosartorya pseudofischeri, n = 1), Aspergillus lentulus (n = 1) and Aspergillus udagawae (n = 1). Brachycephalic purebred cats were significantly more likely to develop URTA than other breeds (P = 0.013). The sensitivity (Se) of the AGID was 43% and the specificity (Sp) was 100%. At a cut-off value of 6 ELISA units/mL, the Se of the IgG ELISA was 95.2% and the Sp was 92% and 92.9% for groups 2 and 3 cats, respectively. Aspergillus-specific antibodies against all four cryptic species were detected in one or both assays. Assay Se was not associated with species identity. Detection of Aspergillus-specific antibodies by IgG ELISA has high Se and Sp for diagnosis of feline URTA.
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Affiliation(s)
- V R Barrs
- Faculty of Veterinary Science, University of Sydney, NSW 2006, Australia.
| | - B Ujvari
- Faculty of Veterinary Science, University of Sydney, NSW 2006, Australia
| | - N K Dhand
- Faculty of Veterinary Science, University of Sydney, NSW 2006, Australia
| | - I R Peters
- TDDS, Innovation Centre, University of Exeter, Devon, UK
| | - J Talbot
- Faculty of Veterinary Science, University of Sydney, NSW 2006, Australia
| | - L R Johnson
- School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | - F Billen
- Faculty of Veterinary Medicine, University of Liege, Belgium
| | - P Martin
- Faculty of Veterinary Science, University of Sydney, NSW 2006, Australia
| | - J A Beatty
- Faculty of Veterinary Science, University of Sydney, NSW 2006, Australia
| | - K Belov
- Faculty of Veterinary Science, University of Sydney, NSW 2006, Australia
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Treat CC, Wollheim WM, Varner RK, Grandy AS, Talbot J, Frolking S. Temperature and peat type control CO2 and CH4 production in Alaskan permafrost peats. Glob Chang Biol 2014; 20:2674-2686. [PMID: 24616169 DOI: 10.1111/gcb.12572] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Accepted: 02/28/2014] [Indexed: 06/03/2023]
Abstract
Controls on the fate of ~277 Pg of soil organic carbon (C) stored in permafrost peatland soils remain poorly understood despite the potential for a significant positive feedback to climate change. Our objective was to quantify the temperature, moisture, organic matter, and microbial controls on soil organic carbon (SOC) losses following permafrost thaw in peat soils across Alaska. We compared the carbon dioxide (CO2 ) and methane (CH4 ) emissions from peat samples collected at active layer and permafrost depths when incubated aerobically and anaerobically at -5, -0.5, +4, and +20 °C. Temperature had a strong, positive effect on C emissions; global warming potential (GWP) was >3× larger at 20 °C than at 4 °C. Anaerobic conditions significantly reduced CO2 emissions and GWP by 47% at 20 °C but did not have a significant effect at -0.5 °C. Net anaerobic CH4 production over 30 days was 7.1 ± 2.8 μg CH4 -C gC(-1) at 20 °C. Cumulative CO2 emissions were related to organic matter chemistry and best predicted by the relative abundance of polysaccharides and proteins (R(2) = 0.81) in SOC. Carbon emissions (CO2 -C + CH4 -C) from the active layer depth peat ranged from 77% larger to not significantly different than permafrost depths and varied depending on the peat type and peat decomposition stage rather than thermal state. Potential SOC losses with warming depend not only on the magnitude of temperature increase and hydrology but also organic matter quality, permafrost history, and vegetation dynamics, which will ultimately determine net radiative forcing due to permafrost thaw.
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Affiliation(s)
- C C Treat
- Earth Systems Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Durham, NH, USA
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de Freitas A, Donate PB, e Silva Castanheira FV, Borges V, Nascimento DC, Talbot J, Alves-Filho JC, Cunha F. Aryl hydrocarbon receptor activation increases survival in polymicrobial sepsis. Crit Care 2014. [PMCID: PMC4273856 DOI: 10.1186/cc14039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Souza GR, Talbot J, Lotufo CM, Cunha FQ, Cunha TM, Ferreira SH. Fractalkine mediates inflammatory pain through activation of satellite glial cells. Proc Natl Acad Sci U S A 2013; 110:11193-8. [PMID: 23776243 PMCID: PMC3704031 DOI: 10.1073/pnas.1307445110] [Citation(s) in RCA: 111] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The activation of the satellite glial cells (SGCs) surrounding the dorsal root ganglion (DRG) neurons appears to play a role in pathological pain. We tested the hypothesis that fractalkine, which is constitutively expressed by primary nociceptive neurons, is the link between peripheral inflammation and the activation of SGCs and is thus responsible for the genesis of the inflammatory pain. The injection of carrageenin into the rat hind paw induced a decrease in the mechanical nociceptive threshold (hypernociception), which was associated with an increase in mRNA and GFAP protein expression in the DRG. Both events were inhibited by anti-fractalkine antibody administered directly into the DRG (L5) [intraganglionar (i.gl.)]. The administration of fractalkine into the DRG (L5) produced mechanical hypernociception in a dose-, time-, and CX3C receptor-1 (CX3CR1)-dependent manner. Fractalkine's hypernociceptive effect appears to be indirect, as it was reduced by local treatment with anti-TNF-α antibody, IL-1-receptor antagonist, or indomethacin. Accordingly, the in vitro incubation of isolated and cultured SGC with fractalkine induced the production/release of TNF-α, IL-1β, and prostaglandin E2. Finally, treatment with i.gl. fluorocitrate blocked fractalkine (i.gl.)- and carrageenin (paw)-induced hypernociception. Overall, these results suggest that, during peripheral inflammation, fractalkine is released in the DRG and contributes to the genesis of inflammatory hypernociception. Fractalkine's effect appears to be dependent on the activation of the SGCs, leading to the production of TNFα, IL-1β, and prostanoids, which are likely responsible for the maintenance of inflammatory pain. Thus, these results indicate that the inhibition of fractalkine/CX3CR1 signaling in SGCs may serve as a target to control inflammatory pain.
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Affiliation(s)
- Guilherme R. Souza
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of Sao Paulo, Ribeirao Preto, SP 14049-900, Sao Paulo, Brazil
| | - Jhimmy Talbot
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of Sao Paulo, Ribeirao Preto, SP 14049-900, Sao Paulo, Brazil
| | | | - Fernando Q. Cunha
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of Sao Paulo, Ribeirao Preto, SP 14049-900, Sao Paulo, Brazil
| | - Thiago M. Cunha
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of Sao Paulo, Ribeirao Preto, SP 14049-900, Sao Paulo, Brazil
| | - Sérgio H. Ferreira
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of Sao Paulo, Ribeirao Preto, SP 14049-900, Sao Paulo, Brazil
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Gabrielli A, Talbot J, Viot P. Non-markovian models of blocking in concurrent and countercurrent flows. Phys Rev Lett 2013; 110:170601. [PMID: 23679696 DOI: 10.1103/physrevlett.110.170601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Revised: 02/20/2013] [Indexed: 06/02/2023]
Abstract
We investigate models in which blocking can interrupt a particulate flow process at any time. Filtration, and flow in micro or nanochannels and traffic flow are examples of such processes. We first consider concurrent flow models where particles enter a channel randomly. If at any time two particles are simultaneously present in the channel, failure occurs. The key quantities are the survival probability and the distribution of the number of particles that pass before failure. We then consider a counterflow model with two opposing Poisson streams. There is no restriction on the number of particles passing in the same direction, but blockage occurs if, at any time, two opposing particles are simultaneously present in the passage.
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Affiliation(s)
- A Gabrielli
- Istituto dei Sistemi Complessi (ISC)-CNR, UOS ‘‘Sapienza’’, Dipartimento di Fisica, University ‘‘Sapienza’’ di Roma,Piazzale Aldo Moro 5, 00185 Rome, Italy
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Abstract
Comparing slopes is a fundamental graph reading task and the aspect ratio chosen for a plot influences how easy these comparisons are to make. According to Banking to 45°, a classic design guideline first proposed and studied by Cleveland et al., aspect ratios that center slopes around 45° minimize errors in visual judgments of slope ratios. This paper revisits this earlier work. Through exploratory pilot studies that expand Cleveland et al.'s experimental design, we develop an empirical model of slope ratio estimation that fits more extreme slope ratio judgments and two common slope ratio estimation strategies. We then run two experiments to validate our model. In the first, we show that our model fits more generally than the one proposed by Cleveland et al. and we find that, in general, slope ratio errors are not minimized around 45°. In the second experiment, we explore a novel hypothesis raised by our model: that visible baselines can substantially mitigate errors made in slope judgments. We conclude with an application of our model to aspect ratio selection.
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Turetsky MR, Bond-Lamberty B, Euskirchen E, Talbot J, Frolking S, McGuire AD, Tuittila ES. The resilience and functional role of moss in boreal and arctic ecosystems. New Phytol 2012; 196:49-67. [PMID: 22924403 DOI: 10.1111/j.1469-8137.2012.04254.x] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Mosses in northern ecosystems are ubiquitous components of plant communities, and strongly influence nutrient, carbon and water cycling. We use literature review, synthesis and model simulations to explore the role of mosses in ecological stability and resilience. Moss community responses to disturbance showed all possible responses (increases, decreases, no change) within most disturbance categories. Simulations from two process-based models suggest that northern ecosystems would need to experience extreme perturbation before mosses were eliminated. But simulations with two other models suggest that loss of moss will reduce soil carbon accumulation primarily by influencing decomposition rates and soil nitrogen availability. It seems clear that mosses need to be incorporated into models as one or more plant functional types, but more empirical work is needed to determine how to best aggregate species. We highlight several issues that have not been adequately explored in moss communities, such as functional redundancy and singularity, relationships between response and effect traits, and parameter vs conceptual uncertainty in models. Mosses play an important role in several ecosystem processes that play out over centuries - permafrost formation and thaw, peat accumulation, development of microtopography - and there is a need for studies that increase our understanding of slow, long-term dynamical processes.
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Affiliation(s)
- M R Turetsky
- Department of Integrative Biology, University of Guelph, Guelph ON N1G 1G2, Canada
| | - B Bond-Lamberty
- Joint Global Change Research Institute, DOE Pacific Northwest National Laboratory, 5825 University Research Ct, College Park, MD, USA
| | - E Euskirchen
- University of Alaska Fairbanks, Institute of Arctic Biology, Fairbanks, AK 99775, USA
| | - J Talbot
- Institute for the Study of Earth, Oceans, and Space, and Department of Earth Sciences, University of New Hampshire, Durham, NH 03824, USA
- Département de Géographie, Université de Montréal, Montréal QC H2V 2B8, Canada
| | - S Frolking
- Institute for the Study of Earth, Oceans, and Space, and Department of Earth Sciences, University of New Hampshire, Durham, NH 03824, USA
| | - A D McGuire
- US Geological Survey, Alaska Cooperative Fish and Wildlife Research Unit, University of Alaska Fairbanks, Fairbanks, AK 99775, USA
| | - E-S Tuittila
- School of Forest Sciences, University of Eastern Finland, PO Box 111, FIN-80101 Joensuu, Finland
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Franca R, Peres R, Talbot J, Cunha T, Cunha F. The role of nucleotide-binding oligomerization domain 2 (Nod2) in initiation of rheumatoid arthritis. (68.7). The Journal of Immunology 2012. [DOI: 10.4049/jimmunol.188.supp.68.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
The etiology of several inflammatory diseases such as rheumatoid arthritis (RA) remains unknown. Some studies including data from our group, report that the receptor NOD2, a member of NLR family, is overexpressed in synovial fibroblasts of patients with RA. Since NOD2 activation might contribute to the initiation and perpetuation of chronic destructive inflammation in RA, we decided to investigate the role of this receptor in arthritis. Initially, WT and NOD2-/- mice were immunized with mBSA, and arthritis was induced by an i.a. injection of mBSA. Our data shows that knockout NOD2 mice did not develop arthritis, as evidenced by the low number of infiltrating cells into the articular cavity, and that transfer of wild type neutrophils into NOD2-/- mice did not restored the inflammatory status. Additionally, to assess if synovial fluid of RA patients could activate NOD2 in vitro, HEK293-Luciferase-NF-κB cells were transfected with a plasmid encoding the NOD2 receptor, 24 hours later these cells were stimulated with MDP or synovial fluid in different concentrations, osteoarthritis synovial fluid were used as control. Luciferase activity was measured 8 hours after stimulation. We observed that stimulation of NOD2 transfected cells with synovial fluid from RA patients leads to increased luciferase activity, suggesting the NF-κB activation dependent of NOD2 signaling in HEK293 cells. Together, these results suggest that NOD2 receptor has an important role in the pathogenesis of RA.
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Affiliation(s)
- Rafael Franca
- 1Department of Pharmacology, University of São Paulo, Ribeirão Preto, Brazil
| | - Raphael Peres
- 2Basic and Applied Immunology, University of São Paulo, Ribeirao Preto, Brazil
| | - Jhimmy Talbot
- 1Department of Pharmacology, University of São Paulo, Ribeirão Preto, Brazil
| | - Thiago Cunha
- 1Department of Pharmacology, University of São Paulo, Ribeirão Preto, Brazil
| | - Fernando Cunha
- 1Department of Pharmacology, University of São Paulo, Ribeirão Preto, Brazil
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Silva J, Talbot J, Lopes A, França R, Fonseca B, Cunha T, Cunha F. Evaluation of immune response in dorsal root ganglion of mice infected with Herpes Simplex Virus type 1 (HSV-1) (76.8). The Journal of Immunology 2012. [DOI: 10.4049/jimmunol.188.supp.76.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Herpes Zoster (HZ) is a disease caused by reactivation of latent herpesvirus Varicella Zoster in the sensory ganglion, characterized by dermal rash and severe pain. A model of mice infected with HSV-1 on the skin of the hind paw has been used to study the pathophysiology of HZ, since they develop HZ-like skin lesions and pain-related responses. There are no data available about the immune response in dorsal root ganglion (DRG) of these mice. Thus, the aim of this study was to evaluate cells and inflammatory mediators present in DRGs and its relationship with hypernociception during HSV-1 cutaneous infection. Mice developed hypernociception from day 3 to 7 post inoculation in the ipsilateral (Ips) paws, but not in the contralateral (Cl) paws. A higher viral load, measured by qPCR, was detected in DRGs L3, L4 and L5 of infected mice, when compared to control mice or naïve mice. By flow citometry analysis, we observed an inflammatory infiltrate composed by CD4+, CD8+, CD11b and Gr1+ cells in DRGs L3, L4 and L5, but not in spinal cord, that correlated with virus presence previously found. A higher expression of COX-2, IFN-γ, GFAP and IL-22 was detected in the same DRGs of Ips paws from infected mice, when compared to the same ganglion of Cl paws or ganglion from naïve mice. Our results show the presence of an inflammatory infiltrate in DRGs of infected mice and the expression of inflammatory mediators which might contribute for the development of hypernociception.
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Affiliation(s)
- Jaqueline Silva
- 1Department of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, Brazil
| | - Jhimmy Talbot
- 2Department of Pharmacology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, Brazil
| | - Alexandre Lopes
- 2Department of Pharmacology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, Brazil
| | - Rafael França
- 2Department of Pharmacology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, Brazil
| | - Benedito Fonseca
- 1Department of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, Brazil
| | - Thiago Cunha
- 1Department of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, Brazil
| | - Fernando Cunha
- 1Department of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, Brazil
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Vieira SM, Cunha TM, França RFO, Pinto LG, Talbot J, Turato WM, Lemos HP, Lima JB, Verri WA, Almeida SCL, Ferreira SH, Louzada-Junior P, Zamboni DS, Cunha FQ. Joint NOD2/RIPK2 signaling regulates IL-17 axis and contributes to the development of experimental arthritis. J Immunol 2012; 188:5116-22. [PMID: 22491249 DOI: 10.4049/jimmunol.1004190] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Intracellular pattern recognition receptors such as the nucleotide-binding oligomerization domain (NOD)-like receptors family members are key for innate immune recognition of microbial infection and may play important roles in the development of inflammatory diseases, including rheumatic diseases. In this study, we evaluated the role of NOD1 and NOD2 on development of experimental arthritis. Ag-induced arthritis was generated in wild-type, NOD1(-/-), NOD2(-/-), or receptor-interacting serine-threonine kinase 2(-/-) (RIPK2(-/-)) immunized mice challenged intra-articularly with methylated BSA. Nociception was determined by electronic Von Frey test. Neutrophil recruitment and histopathological analysis of proteoglycan lost was evaluated in inflamed joints. Joint levels of inflammatory cytokine/chemokine were measured by ELISA. Cytokine (IL-6 and IL-23) and NOD2 expressions were determined in mice synovial tissue by RT-PCR. The NOD2(-/-) and RIPK2(-/-), but not NOD1(-/-), mice are protected from Ag-induced arthritis, which was characterized by a reduction in neutrophil recruitment, nociception, and cartilage degradation. NOD2/RIPK2 signaling impairment was associated with a reduction in proinflammatory cytokines and chemokines (TNF, IL-1β, and CXCL1/KC). IL-17 and IL-17 triggering cytokines (IL-6 and IL-23) were also reduced in the joint, but there is no difference in the percentage of CD4(+) IL-17(+) cells in the lymph node between arthritic wild-type and NOD2(-/-) mice. Altogether, these findings point to a pivotal role of the NOD2/RIPK2 signaling in the onset of experimental arthritis by triggering an IL-17-dependent joint immune response. Therefore, we could propose that NOD2 signaling is a target for the development of new therapies for the control of rheumatoid arthritis.
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Affiliation(s)
- Silvio M Vieira
- Department of Pharmacology, Faculty of Medicine of Ribeirão Preto, University of São Paulo, São Paulo 14049-900, Brazil
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Abstract
Within the framework of a Boltzmann-Lorentz equation, we analyze the dynamics of a granular rotor immersed in a bath of thermalized particles in the presence of a frictional torque on the axis. In numerical simulations of the equation, we observe two scaling regimes at low and high bath temperatures. In the large friction limit, we obtain the exact solution of a model corresponding to asymptotic behavior of the Boltzmann-Lorentz equation. In the limit of large rotor mass and small friction, we derive a Fokker-Planck equation for which the exact solution is also obtained.
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Affiliation(s)
- J Talbot
- Laboratoire de Physique Théorique de la Matière Condensée, UPMC, CNRS UMR, Paris, France
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Talbot J, Evans V. Therapeutic hand massage: empowering carers to care. BMJ Support Palliat Care 2011. [DOI: 10.1136/bmjspcare-2011-000105.137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Lawley L, Talbot J, Franke D. Supporting end of life care delivery: an inclusive approach. BMJ Support Palliat Care 2011. [DOI: 10.1136/bmjspcare-2011-000105.135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Gratrix J, Fan S, Anderson B, Conroy P, Hewitt S, Parnell T, Jaipual J, Parker P, Singh AE, Talbot J. P5-S4.05 The use of financial compensation as an incentive for infectious syphilis case finding among vulnerable populations in Edmonton, Canada. Br J Vener Dis 2011. [DOI: 10.1136/sextrans-2011-050108.546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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