1
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Tihăuan BM, Pircalabioru GG, Axinie (Bucos) M, Marinaș IC, Nicoară AC, Măruțescu L, Oprea O, Matei E, Maier SS. Crosslinked Collagenic Scaffold Behavior Evaluation by Physico-Chemical, Mechanical and Biological Assessments in an In Vitro Microenvironment. Polymers (Basel) 2022; 14:polym14122430. [PMID: 35746006 PMCID: PMC9227487 DOI: 10.3390/polym14122430] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 05/31/2022] [Accepted: 06/08/2022] [Indexed: 12/15/2022] Open
Abstract
Wound healing-associated difficulties continue to drive biotechnological creativeness into complex grounds. The sophisticated architecture of skin wound sites and the intricate processes involved in the response to the use of regenerative devices play a critical role in successful skin regeneration approaches and their possible outcomes. Due to a plethora of complications involved in wound healing processes as well as the coordination of various cellular mechanisms, biomimetic approaches seems to be the most promising starting ground. This study evaluates the behavior of a crosslinked, porous collagen scaffold obtained by lyophilization and dehydrothermal reticulation (DHT). We address the key physio-chemical and mechanical factors, such as swelling, density and porosity, mechano-dynamic properties, SEM and TG-DSC, as well as important biological outcomes regarding scaffold biocompatibility and cellular metabolic activity, cytokine expression in inflammation, apoptosis and necrosis, as well as hemocompatibility and biodegradation. The mechanical and visco-elastic behavior are correlated, with the samples found to present similar thermal behavior and increased rigidity after DHT treatment. High biocompatibility rates were obtained, with no inflammatory stimulation and a reduction in necrotic cells. Higher percentages of cellular early apoptosis were observed. The hemocompatibility rate was under 2%, coagulation effects expressed after 4 min, and the DHT scaffold was more resistant to the biodegradation of collagenase compared with the untreated sample.
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Affiliation(s)
- Bianca-Maria Tihăuan
- Research & Development for Advanced Biotechnologies and Medical Devices, SC Sanimed International Impex SRL, 087040 Călugăreni, Romania; (B.-M.T.); (M.A.); (I.C.M.); (S.S.M.)
- Research Institute of the University of Bucharest—ICUB, 91-95 Spl. Independentei, 50567 Bucharest, Romania;
| | - Gratiela Gradisteanu Pircalabioru
- Research & Development for Advanced Biotechnologies and Medical Devices, SC Sanimed International Impex SRL, 087040 Călugăreni, Romania; (B.-M.T.); (M.A.); (I.C.M.); (S.S.M.)
- Research Institute of the University of Bucharest—ICUB, 91-95 Spl. Independentei, 50567 Bucharest, Romania;
- Academy of Romanian Scientists, Ilfov Street 3, 050054 Bucharest, Romania;
- Correspondence:
| | - Mădălina Axinie (Bucos)
- Research & Development for Advanced Biotechnologies and Medical Devices, SC Sanimed International Impex SRL, 087040 Călugăreni, Romania; (B.-M.T.); (M.A.); (I.C.M.); (S.S.M.)
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1-7 Gh. Polizu Street, 011061 Bucharest, Romania
| | - Ioana Cristina Marinaș
- Research & Development for Advanced Biotechnologies and Medical Devices, SC Sanimed International Impex SRL, 087040 Călugăreni, Romania; (B.-M.T.); (M.A.); (I.C.M.); (S.S.M.)
- Research Institute of the University of Bucharest—ICUB, 91-95 Spl. Independentei, 50567 Bucharest, Romania;
| | - Anca-Cecilia Nicoară
- Faculty of Pharmacy, University of Medicine and Pharmacy “Carol Davila”, 020021 Bucharest, Romania;
| | - Luminița Măruțescu
- Research Institute of the University of Bucharest—ICUB, 91-95 Spl. Independentei, 50567 Bucharest, Romania;
| | - Ovidiu Oprea
- Academy of Romanian Scientists, Ilfov Street 3, 050054 Bucharest, Romania;
- Faculty of Chemical Engineering and Biotechnologies, University of Politehnica Bucharest, Gh. Polizu Street 1-7, 011061 Bucharest, Romania
| | - Elena Matei
- National Institute of Materials Physics–Magurele, 405A Atomistilor Street, 077125 Magurele, Romania;
| | - Stelian Sergiu Maier
- Research & Development for Advanced Biotechnologies and Medical Devices, SC Sanimed International Impex SRL, 087040 Călugăreni, Romania; (B.-M.T.); (M.A.); (I.C.M.); (S.S.M.)
- Department of Chemical Engineering in Textiles and Leather, Faculty of Industrial Design and Business Management, “Gheorghe Asachi” Technical University of Iasi, 700050 Iași, Romania
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2
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Chen CS, Weber J, Holtkamp SJ, Ince LM, de Juan A, Wang C, Lutes L, Barnoud C, Kizil B, Hergenhan SM, Salvermoser J, Lasch M, Deindl E, Schraml B, Baumjohann D, Scheiermann C. Loss of direct adrenergic innervation after peripheral nerve injury causes lymph node expansion through IFN-γ. J Exp Med 2021; 218:e20202377. [PMID: 34086056 PMCID: PMC8185988 DOI: 10.1084/jem.20202377] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 02/19/2021] [Accepted: 05/03/2021] [Indexed: 11/04/2022] Open
Abstract
Peripheral nerve injury can cause debilitating disease and immune cell-mediated destruction of the affected nerve. While the focus has been on the nerve-regenerative response, the effect of loss of innervation on lymph node function is unclear. Here, we show that the popliteal lymph node (popLN) receives direct neural input from the sciatic nerve and that sciatic denervation causes lymph node expansion. Loss of sympathetic, adrenergic tone induces the expression of IFN-γ in LN CD8 T cells, which is responsible for LN expansion. Surgery-induced IFN-γ expression and expansion can be rescued by β2 adrenergic receptor agonists but not sensory nerve agonists. These data demonstrate the mechanisms governing the pro-inflammatory effect of loss of direct adrenergic input on lymph node function.
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Affiliation(s)
- Chien-Sin Chen
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
| | - Jasmin Weber
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
| | - Stephan Jonas Holtkamp
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
| | - Louise Madeleine Ince
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Alba de Juan
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
| | - Chen Wang
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Lydia Lutes
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Coline Barnoud
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Burak Kizil
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Sophia Martina Hergenhan
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
| | - Johanna Salvermoser
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
| | - Manuel Lasch
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximillians-Universität München, Munich, Germany
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital, Ludwig-Maximillians-Universität München, Munich, Germany
| | - Elisabeth Deindl
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
- Walter-Brendel-Centre of Experimental Medicine, University Hospital, Ludwig-Maximillians-Universität München, Munich, Germany
| | - Barbara Schraml
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
| | - Dirk Baumjohann
- Institute for Immunology, Biomedical Center, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
- Medical Clinic III for Oncology, Hematology, Immuno-Oncology and Rheumatology, University Hospital Bonn, University of Bonn, Bonn, Germany
| | - Christoph Scheiermann
- Biomedical Center, Institute of Cardiovascular Physiology and Pathophysiology, Faculty of Medicine, Ludwig-Maximillians-Universität München, Planegg-Martinsried, Germany
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
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3
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Fagone P, Mazzon E, Chikovani T, Saraceno A, Mammana S, Colletti G, Mangano K, Bramanti P, Nicoletti F. Decitabine induces regulatory T cells, inhibits the production of IFN-gamma and IL-17 and exerts preventive and therapeutic efficacy in rodent experimental autoimmune neuritis. J Neuroimmunol 2018; 321:41-48. [PMID: 29957387 DOI: 10.1016/j.jneuroim.2018.05.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 05/24/2018] [Accepted: 05/26/2018] [Indexed: 02/01/2023]
Abstract
Guillain-Barré syndrome (GBS) is an immune-mediated acute disorder of the peripheral nervous system. Despite treatment, there is an associated mortality and severe disability in 9 to 17% of the cases. Decitabine (DAC) is a hypomethylating drug used in myelodisplastic syndrome, that has been shown to exert immunomodulatory effects. We have evaluated the effects of DAC in two rodent models of GBS, the Experimental Allergic Neuritis (EAN). Both prophylactic and therapeutic treatment with DAC ameliorated the clinical course of EAN, increasing the numbers of thymic regulatory T cells and reducing the production of proinflammmatory cytokines. Our data suggest the possible use of decitabine for the treatment of GBS.
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Affiliation(s)
- Paolo Fagone
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Emanuela Mazzon
- IRCCS Centro Neurolesi Bonino Pulejo, Stada Statale 113, C.da Casazza, 98124 Messina, Italy
| | - Tinatin Chikovani
- Department of Immunology, Tbilisi State Medical University, 0186 Tbilisi, Georgia
| | - Andrea Saraceno
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Santa Mammana
- IRCCS Centro Neurolesi Bonino Pulejo, Stada Statale 113, C.da Casazza, 98124 Messina, Italy
| | - Giuseppe Colletti
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Katia Mangano
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Placido Bramanti
- IRCCS Centro Neurolesi Bonino Pulejo, Stada Statale 113, C.da Casazza, 98124 Messina, Italy
| | - Ferdinando Nicoletti
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy.
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4
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Zhang HL, Wu L, Wu X, Zhu J. Can IFN-γ be a therapeutic target in Guillain-Barré syndrome? Expert Opin Ther Targets 2014; 18:355-63. [DOI: 10.1517/14728222.2014.882899] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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5
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Zhang HL, Zheng XY, Zhu J. Th1/Th2/Th17/Treg cytokines in Guillain–Barré syndrome and experimental autoimmune neuritis. Cytokine Growth Factor Rev 2013. [DOI: 10.1016/j.cytogfr.2013.05.005 10.1016/j.cytogfr.2013.05.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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6
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Zhang HL, Zheng XY, Zhu J. Th1/Th2/Th17/Treg cytokines in Guillain–Barré syndrome and experimental autoimmune neuritis. Cytokine Growth Factor Rev 2013; 24:443-53. [DOI: 10.1016/j.cytogfr.2013.05.005] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2013] [Revised: 05/08/2013] [Accepted: 05/21/2013] [Indexed: 12/12/2022]
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7
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Ydens E, Lornet G, Smits V, Goethals S, Timmerman V, Janssens S. The neuroinflammatory role of Schwann cells in disease. Neurobiol Dis 2013; 55:95-103. [DOI: 10.1016/j.nbd.2013.03.005] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 03/08/2013] [Accepted: 03/13/2013] [Indexed: 12/27/2022] Open
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8
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Zeng XL, Nagavalli A, Smith CJ, Howard JF, Su MA. Divergent effects of T cell costimulation and inflammatory cytokine production on autoimmune peripheral neuropathy provoked by Aire deficiency. THE JOURNAL OF IMMUNOLOGY 2013; 190:3895-904. [PMID: 23487421 DOI: 10.4049/jimmunol.1203001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Chronic inflammatory demyelinating polyneuropathy results from autoimmune destruction of the peripheral nervous system and is a component of the multiorgan autoimmunity syndrome that results from Aire gene mutations in humans. In parallel, peripheral nervous system autoimmunity resembling chronic inflammatory demyelinating polyneuropathy develops spontaneously in NOD mice with a partial loss of Aire function (NOD.Aire(GW/+) mice) and is a T cell-mediated disease. In this study, we analyze how key aspects of T cell activation and function modulate disease development in Aire-deficient mice. We show that genetic ablation of the Th1 cytokine IFN-γ completely prevents clinical and electrophysiological evidence of neuropathy in NOD.Aire(GW/+) mice. IFN-γ deficiency is associated with absence of immune infiltration and decreased expression of the T cell chemoattractant IP-10 in sciatic nerves. Thus, IFN-γ is absolutely required for the development of autoimmune peripheral neuropathy in NOD.Aire(GW/+) mice. Because IFN-γ secretion is enhanced by B7-CD28 costimulation of T cells, we sought to determine the effects of these costimulatory molecules on neuropathy development. Surprisingly, B7-2 deficiency accelerated neuropathy development in NOD.Aire(GW/+) mice, and Ab blockade of both B7-1 and B7-2 resulted in fulminant, early-onset neuropathy. Thus, in contrast to IFN-γ, B7-2 alone and B7-1/B7-2 in combination function to ameliorate neuropathy development in NOD.Aire(GW/+) mice. Together, these findings reveal distinct and opposing effects of the T cell costimulatory pathway and IFN-γ production on the pathogenesis of autoimmune peripheral neuropathy.
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Affiliation(s)
- Xiaopei L Zeng
- Department of Pediatrics, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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9
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Zhang HL, Azimullah S, Zheng XY, Wang XK, Amir N, Mensah-Brown EP, Al Shamsi M, Shahin A, Press R, Zhu J, Adem A. IFN-γ deficiency exacerbates experimental autoimmune neuritis in mice despite a mitigated systemic Th1 immune response. J Neuroimmunol 2012; 246:18-26. [DOI: 10.1016/j.jneuroim.2012.02.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Revised: 02/20/2012] [Accepted: 02/21/2012] [Indexed: 11/17/2022]
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10
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Wang YZ, Liang QH, Ramkalawan H, Wang YL, Yang YF, Zhou WB, Tian FF, Li J, Yang H. Expression of Toll-like receptors 2, 4 and 9 in patients with Guillain-Barré syndrome. Neuroimmunomodulation 2012; 19:60-8. [PMID: 22067623 DOI: 10.1159/000328200] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2011] [Accepted: 04/06/2011] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE A myriad of transcription factors and inflammatory cytokines have been described to participate in the pathogenesis of Guillain-Barré syndrome (GBS). However, the innate immunity components--Toll-like receptors (TLRs)--have never been explored in this disease. We therefore investigated the expression of TLR2, 4 and 9 in the peripheral circulation of GBS patients as well as healthy controls. METHODS Twenty-one GBS patients and 21 healthy donors participated in this study. Peripheral blood mononuclear cells were used for mRNA and protein analysis of TLR-related molecules. Also, peripheral blood mononuclear cells from different subjects were incubated with different TLR agonists and the subsequent IFN-γ secretion was determined. RESULTS Expression of TLR2, 4 and 9 as well as their related signaling molecules were higher in GBS patients compared to healthy controls. Disability scores of GBS patients had a strong positive correlation with the high levels of expression of TLR2, 4 and 9. CONCLUSIONS The TLR signaling pathway may be involved in the pathogenesis of GBS.
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Affiliation(s)
- Yu-Zhong Wang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, PR China
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11
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The role of cytokines in Guillain-Barré syndrome. J Neurol 2010; 258:533-48. [PMID: 21104265 DOI: 10.1007/s00415-010-5836-5] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2010] [Revised: 10/13/2010] [Accepted: 11/09/2010] [Indexed: 12/17/2022]
Abstract
Cytokines play an important role in the pathogenesis of autoimmune diseases including Guillain-Barré syndrome (GBS) and its animal model experimental autoimmune neuritis (EAN). In this article, we reviewed the current knowledge of the role of cytokines such as TNF-α, IFN-γ, IL-1β, IL-6, IL-12, IL-18, IL-23, IL-17, IL-10, IL-4 and chemokines in GBS and EAN as unraveled by studies both in the clinic and the laboratory. However, these studies occasionally yield conflicting results, highlighting the complex role that cytokines play in the disease process. Efforts to modulate cytokine function in GBS and other autoimmune disease have shown efficiency indicating that cytokines are important therapeutic targets.
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12
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Xia RH, Yosef N, Ubogu EE. Dorsal caudal tail and sciatic motor nerve conduction studies in adult mice: technical aspects and normative data. Muscle Nerve 2010; 41:850-6. [PMID: 20151466 DOI: 10.1002/mus.21588] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Mice provide an important tool to investigate human neuromuscular disorders. The variability of electrophysiological techniques limits direct comparison between studies. The purpose of this study was to establish normative motor nerve conduction data in adult mice. The dorsal caudal tail nerve and sciatic nerve motor conduction studies were performed bilaterally on restrained anesthetized adult mice. The means and standard deviations for each electrophysiological parameter were determined in normal mice. Data were compared with inflammatory demyelinating polyneuropathy mice to determine whether these parameters discriminate between normal and abnormal peripheral nerves. Normal adult mice had a distal latency of 0.89 (+/-0.17) ms and 0.75 (+/-0.09) ms, distal compound motor unit action potential amplitude of 13.2 (+/-5.9) mV and 28.1 (+/-8.3) mV, and conduction velocity of 74.6 (+/-9.0) m/s and 76.5 (+/-8.3) m/s, respectively. These data were validated by the finding of statistically significant differences in several electrophysiological parameters that compared normal and polyneuropathy-affected mice. A standardized method for motor nerve conduction studies and associated normative data in mice should facilitate comparisons of disease severity and response to treatment between studies that use similar models. This would assist in the process of translational therapeutic drug design in neuromuscular disorders.
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Affiliation(s)
- Robin H Xia
- Neuromuscular Immunopathology Research Laboratory, Department of Neurology, Baylor College of Medicine, One Baylor Plaza, Mailstop NB 302, Houston, Texas 77030-3411, USA
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13
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Kim HJ, Jung CG, Jensen MA, Dukala D, Soliven B. Targeting of myelin protein zero in a spontaneous autoimmune polyneuropathy. THE JOURNAL OF IMMUNOLOGY 2009; 181:8753-60. [PMID: 19050296 DOI: 10.4049/jimmunol.181.12.8753] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Elimination of the costimulatory molecule B7-2 prevents autoimmune diabetes in NOD mice, but leads to the development of a spontaneous autoimmune polyneuropathy (SAP), which resembles the human disease chronic inflammatory demyelinating polyneuropathy (CIDP). In this study, we examined the immunopathogenic mechanisms in this model, including identification of SAP Ags. We found that B7-2-deficient NOD mice exhibit changes in cytokine and chemokine gene expression in spleens over time. There was an increase in IL-17 and a decrease in IL-10 transcript levels at 4 mo (preclinical phase), whereas IFN-gamma expression peaked at 8 mo (clinical phase). There was also an increase in transcript levels of Th1 cytokines, CXCL10, and RANTES in sciatic nerves of mice that developed SAP. Splenocytes from SAP mice exhibited proliferative and Th1 cytokine responses to myelin P0 (180-199), but not to other P0 peptides or P2 (53-78). Adoptive transfer of P0-reactive T cells generated from SAP mice induced neuropathy in four of six NOD.SCID mice. Data from i.v. tolerance studies indicate that myelin P0 is one of the autoantigens targeted by T cells in SAP in this model. The expression of P0 by peri-islet Schwann cells provides a potential mechanism linking islet autoimmunity and inflammatory neuropathy.
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Affiliation(s)
- Hye-Jung Kim
- Department of Neurology, The University of Chicago, Chicago, IL 60637, USA
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14
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Tan XD, Dou YC, Shi CW, Duan RS, Sun RP. Administration of dehydroepiandrosterone ameliorates experimental autoimmune neuritis in Lewis rats. J Neuroimmunol 2009; 207:39-44. [PMID: 19174309 DOI: 10.1016/j.jneuroim.2008.11.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2008] [Revised: 11/20/2008] [Accepted: 11/21/2008] [Indexed: 11/25/2022]
Abstract
Dehydroepiandrosterone (DHEA) is an abundant adrenal steroid in serum of humans, and has been reported to have anti-inflammatory, anti-proliferative, and certain immune-regulating properties. Experimental autoimmune neuritis (EAN) is a Th1 cell-mediated animal model of Guillain-Barré syndrome (GBS) in humans. In the present study, DHEA was administered subcutaneously to Lewis rats immunized with bovine peripheral myelin (BPM) in Freund's complete adjuvant. Rats treated with DHEA displayed significant delay in onset, decreased inflammatory cell infiltration in the PNS. Benefit was associated with significant decreases in numbers of IFN-gamma and TNF-alpha expressing cells in the PNS, BPM-stimulated T cell proliferation and IFN-gamma, TNF-alpha-secretion in the spleen cells. Only 2 mg DHEA-treated EAN rats decreased peak clinical score. No significant difference of supernatant IL-10 was found among the treatment and control groups. These results suggest that DHEA can ameliorate the severity of EAN by suppressing the proliferation of autoreactive T cell and expression of pro-inflammatory cytokines.
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Affiliation(s)
- Xiao-Dong Tan
- Department of Pediatrics, Qianfoshan Hospital, Shandong University, Jinan, China
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15
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Mathieu MC, Lord-Dufour S, Bernier V, Boie Y, Burch JD, Clark P, Denis D, Han Y, Mortimer JR, Therien AG. Mutual antagonistic relationship between prostaglandin E(2) and IFN-gamma: Implications for rheumatoid arthritis. Eur J Immunol 2008; 38:1900-12. [PMID: 18506884 DOI: 10.1002/eji.200838170] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Prostaglandin E(2) (PGE(2)) is a major mediator of inflammation and is present at high concentrations in the synovial fluid of rheumatoid arthritis (RA) patients. PGE(2), acting through the EP4 receptor, has both pro- and anti-inflammatory roles in vivo. To shed light on this dual role of PGE(2), we investigated its effects in whole blood and in primary human fibroblast-like synoviocytes (FLS). Gene expression analysis in human leukocytes, confirmed at the protein level, revealed an EP4-dependent inhibition of the expression of genes involved in the IFN-gamma-activation pathway, including IFN-gamma itself. This effect of the PGE(2)/EP4 axis on IFN-gamma is a reciprocal phenomenon since IFN-gamma blocks PGE(2) release and blocks EP receptor expression. The mutually antagonistic relationship between IFN-gamma and PGE(2) extends to downstream cytokine and chemokine release; PGE(2) counters the effects of IFN-gamma, on the release of IP-10, IL-8, TNF-alpha and IL-1beta. To gain further insight into IFN-gamma-mediated cellular events in RA, we assessed the effects of IFN-gamma on gene expression in FLS. We observed an IFN-gamma-dependent up-regulation of macrophage-attracting chemokines, and down-regulation of metalloprotease expression. These results suggest the existence of a mutually antagonistic relationship between PGE(2) and IFN-gamma, which may represent a fundamental mechanism of immune control in diseases such as RA.
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Affiliation(s)
- Marie-Claude Mathieu
- Department of Biochemistry and Molecular Biology, Merck Frosst Center for Therapeutic Research, Kirkland, Canada
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16
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Luger D, Caspi RR. New perspectives on effector mechanisms in uveitis. Semin Immunopathol 2008; 30:135-43. [PMID: 18317764 DOI: 10.1007/s00281-008-0108-5] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2008] [Accepted: 02/04/2008] [Indexed: 12/13/2022]
Abstract
Experimental autoimmune uveitis (EAU) in its several variants represents human autoimmune uveitis and has been instrumental in obtaining insights into the basic mechanisms of disease. Studies have uncovered that in addition to CD4+ Th1 cells, uveitis can be induced also by CD8+ T cells. Antibodies may have a secondary role after the blood-retinal barrier has been broken. The role in uveitis of a recently discovered IL-17-producing effector T cell type, Th17, is being intensively studied. Th17 cells elicit EAU, can be found in uveitic eyes along with Th1 cells, and are dominant in some types of EAU. In other types of EAU, Th1 cells have a dominant role. The dominant effector type is at least in part determined by conditions under which initial exposure to self-antigen occurs. These findings shed light on the heterogeneity of human disease and may ultimately help to develop better and more rational treatment strategies for human uveitis.
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Affiliation(s)
- Dror Luger
- Laboratory of Immunology, National Eye Institute, National Institutes of Health, 10 Center Drive, Building 10, Room 10N222, Bethesda, MD 20892, USA
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17
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Moalem-Taylor G, Allbutt HN, Iordanova MD, Tracey DJ. Pain hypersensitivity in rats with experimental autoimmune neuritis, an animal model of human inflammatory demyelinating neuropathy. Brain Behav Immun 2007; 21:699-710. [PMID: 17005365 DOI: 10.1016/j.bbi.2006.07.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2006] [Revised: 06/30/2006] [Accepted: 07/12/2006] [Indexed: 01/20/2023] Open
Abstract
Experimental autoimmune neuritis (EAN) is a T cell mediated autoimmune disease of the peripheral nervous system that serves as an animal model of the acute inflammatory demyelinating polyradiculoneuropathy in Guillain-Barre syndrome (GBS). Although pain is a common symptom of GBS occurring in 55-85% of cases, it is often overlooked and the underlying mechanisms are poorly understood. Here we examined whether animals with EAN exhibit signs of neuropathic pain including hyperalgesia and allodynia, and assessed their peripheral nerve autoimmune inflammation. We immunized Lewis rats with peripheral myelin P2 peptide (amino acids 57-81) emulsified with complete Freund's adjuvant, or with adjuvant only as control. P2-immunized rats developed mild to modest monophasic EAN with disease onset at day 8, peak at days 15-17, and full recovery by day 28 following immunization. Rats with EAN showed a significant decrease in withdrawal latency to thermal stimuli and withdrawal threshold to mechanical stimuli, in both hindpaws and forepaws, during the course of the disease. We observed a significant infiltration of T cells bearing alphabeta receptors, and a significant increase in antigen-presenting cells expressing MHC class II as well as macrophages, in EAN-affected rats. Our results demonstrate that animals with active EAN develop significant thermal hyperalgesia and mechanical allodynia, accompanied by pronounced autoimmune inflammation in peripheral nerves. These findings suggest that EAN is a useful model for the pain seen in many GBS patients, and may facilitate study of neuroimmune mechanisms underlying pain in autoimmune neuropathies.
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Affiliation(s)
- Gila Moalem-Taylor
- School of Medical Sciences, University of New South Wales, Sydney, NSW 2052, Australia.
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18
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Meyer zu Hörste G, Hartung HP, Kieseier BC. From bench to bedside--experimental rationale for immune-specific therapies in the inflamed peripheral nerve. ACTA ACUST UNITED AC 2007; 3:198-211. [PMID: 17410107 DOI: 10.1038/ncpneuro0452] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2006] [Accepted: 02/06/2007] [Indexed: 12/28/2022]
Abstract
Guillain-Barré syndrome and chronic inflammatory demyelinating polyradiculoneuropathy are autoimmune-mediated inflammatory diseases of the PNS. In recent years, substantial progress has been made towards understanding the immune mechanisms that underlie these conditions, in large part through the study of experimental models. Here, we review the available animal models that partially mimic human Guillain-Barré syndrome and chronic inflammatory demyelinating polyneuropathy, and discuss the wide range of therapeutic approaches that have been successfully established in these models of inflammatory neuropathies. Transfer of this preclinical knowledge to patients has been far less successful, and inflammatory neuropathies are still associated with significant morbidity and mortality. We will summarize successful therapeutic trials in human autoimmune neuropathies to provide a vantage point for the transfer of experimental treatment strategies to clinical practice in immune-mediated diseases of the peripheral nerve.
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19
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Duan RS, Zhang XM, Mix E, Quezada HC, Adem A, Zhu J. IL-18 deficiency inhibits both Th1 and Th2 cytokine production but not the clinical symptoms in experimental autoimmune neuritis. J Neuroimmunol 2007; 183:162-7. [PMID: 17218016 DOI: 10.1016/j.jneuroim.2006.12.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2006] [Revised: 11/15/2006] [Accepted: 12/01/2006] [Indexed: 11/24/2022]
Abstract
IL-18 deficient (IL-18-/-) mice were used to investigate the role of IL-18 in the pathogenesis of experimental autoimmune neuritis (EAN) which was induced by immunization of the mice with P0 protein peptide 180-199. The clinical course was not different between IL-18-/- and wild-type mice. The splenic mononuclear cell (MNC) proliferation was also similar in both animal groups. However, the percentages of IFN-gamma, IL-10 and IL-12 positive cells were decreased among infiltrating MNC of cauda equine in IL-18-/- mice. This indicates that IL-18 deficiency inhibits the production of both Th1 and Th2 cytokines in the target organ of mice with EAN.
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Affiliation(s)
- Rui-Sheng Duan
- Department of Neurobiology, Care Sciences and Society, Karolinska Institute, Stockholm, Sweden
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20
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Zhu W, Mix E, Jin T, Adem A, Zhu J. B cells play a cooperative role via CD40L-CD40 interaction in T cell-mediated experimental autoimmune neuritis in Lewis rats. Neurobiol Dis 2006; 25:642-8. [PMID: 17188497 DOI: 10.1016/j.nbd.2006.11.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2006] [Revised: 10/17/2006] [Accepted: 11/05/2006] [Indexed: 10/23/2022] Open
Abstract
The expression of co-stimulatory molecules CD40 and CD40L was examined over the course of experimental autoimmune neuritis (EAN) induced in Lewis rats by immunization with bovine peripheral nerve myelin. In draining lymph nodes, highest level of CD40L expression was seen on day 7 post immunization (p.i.), i.e. before onset of clinical signs of EAN, while CD40 expression was increased on day 14 p.i., i.e. at peak of clinical disease. In contrast, both CD40 and CD40L expressing cells in sciatic nerves, a target organ of EAN, peaked on day 14 p.i., large numbers of both expressing cells were mainly detected on day 14-21 p.i. After co-culture with EAN rat B cells bearing CD40, P0 peptide 180-199-specific T cell line cells exhibited a rapid down-regulation of CD40L expression. Furthermore, EAN rats had enhanced P0 peptide 180-199-specific antibody responses on day 14 p.i., which might have contributed to their aggravated EAN and further demonstrated the role of antibodies in EAN. The results indicate that CD40L-CD40 interactions are involved in the initiation of the antigen-specific T cell responses associated with the generation and development of EAN, and may mediate autoantibody production in EAN. Evidently, B cells play a cooperative role via CD40L-CD40 interaction in T cell-mediated EAN of Lewis rats.
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Affiliation(s)
- Wei Zhu
- Department of Otorhinolaryngology, first Hospital, JiLin University, Changchun, China
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21
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Drescher KM, Tracy SM. Injection of the sciatic nerve with TMEV: a new model for peripheral nerve demyelination. Virology 2006; 359:233-42. [PMID: 17028060 PMCID: PMC1847644 DOI: 10.1016/j.virol.2006.09.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2006] [Accepted: 09/07/2006] [Indexed: 10/24/2022]
Abstract
Demyelination of the human peripheral nervous system (PNS) can be caused by diverse mechanisms including viral infection. Despite association of several viruses with the development of peripheral demyelination, animal models of the condition have been limited to disease that is either autoimmune or genetic in origin. We describe here a model of PNS demyelination based on direct injection of sciatic nerves of mice with the cardiovirus, Theiler's murine encephalomyelitis virus (TMEV). Sciatic nerves of FVB mice develop inflammatory cell infiltration following TMEV injection. Schwann cells and macrophages are infected with TMEV. Viral replication is observed initially in the sciatic nerves and subsequently the spinal cord. Sciatic nerves are demyelinated by day 5 post-inoculation (p.i.). Injecting sciatic nerves of scid mice resulted in increased levels of virus recovered from the sciatic nerve and spinal cord relative to FVB mice. Demyelination also occurred in scid mice and by 12 days p.i., hindlimbs were paralyzed. This new model of virus-induced peripheral demyelination may be used to dissect processes involved in protection of the PNS from viral insult and to study the early phases of lesion development.
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Affiliation(s)
- Kristen M Drescher
- Department of Medical Microbiology and Immunology, Creighton University School of Medicine, 2500 California Plaza, Criss II, Room 424, Omaha, NE 68178, USA.
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22
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Yu S, Sharp GC, Braley-Mullen H. Thyrocytes responding to IFN-gamma are essential for development of lymphocytic spontaneous autoimmune thyroiditis and inhibition of thyrocyte hyperplasia. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2006; 176:1259-65. [PMID: 16394017 DOI: 10.4049/jimmunol.176.2.1259] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
IFN-gamma promotes the development of lymphocytic spontaneous autoimmune thyroiditis (L-SAT) in NOD.H-2h4 mice and inhibits the development of thyrocyte hyperplasia and proliferation (TEC H/P). The precise mechanisms by which IFN-gamma promotes L-SAT and inhibits TEC H/P are unknown. To determine whether responsiveness of lymphocytes or thyrocytes to IFN-gamma is important for the development of these lesions, IFN-gammaR-/- mice, which develop TEC H/P similar to IFN-gamma-/- mice, were used as recipients for adoptive cell transfer. Wild-type (WT) splenocytes or bone marrow induced L-SAT and inhibited TEC H/P in IFN-gamma-/-, but not IFN-gammaR-/- recipients. IFN-gammaR-/- recipients of WT cells developed severe TEC H/P, but did not develop L-SAT, suggesting that thyrocytes responding to IFN-gamma are important for inhibition of TEC H/P. Unexpectedly, IFN-gammaR-/- splenocytes or bone marrow did not induce L-SAT in IFN-gamma-/- or WT mice even though IFN-gammaR-/- lymphocyte donors produced as much IFN-gamma as lymphocytes from WT donors, and thyrocytes could respond to IFN-gamma. Real-time PCR indicated that recipients of IFN-gammaR-/- bone marrow expressed less mRNA for IFN-gamma-inducible chemokines compared with recipients of WT bone marrow. This might limit the migration of IFN-gammaR-/- lymphocytes to thyroids. Few IFN-gammaR-/- lymphocytes infiltrated thyroids even in the presence of WT lymphocytes, suggesting that lymphocytes unable to respond to IFN-gamma are not induced to migrate to thyroids. These results suggest that thyrocytes must be able to respond to IFN-gamma for the development of L-SAT and inhibition of TEC H/P, and lymphocytes must be able to respond to IFN-gamma to induce L-SAT.
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MESH Headings
- Adoptive Transfer
- Animals
- Base Sequence
- Chemokines/genetics
- Hyperplasia
- Interferon-gamma/deficiency
- Interferon-gamma/genetics
- Interferon-gamma/physiology
- Lymphocytes/immunology
- Lymphocytes/pathology
- Male
- Mice
- Mice, Inbred NOD
- Mice, Knockout
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Receptors, Interferon/deficiency
- Receptors, Interferon/genetics
- Receptors, Interferon/physiology
- Thyroid Gland/immunology
- Thyroid Gland/pathology
- Thyroiditis, Autoimmune/etiology
- Thyroiditis, Autoimmune/immunology
- Thyroiditis, Autoimmune/pathology
- Interferon gamma Receptor
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Affiliation(s)
- Shiguang Yu
- Department of Internal Medicine, University of Missouri School of Medicine, Columbia, MO 65212, USA
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23
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Bour-Jordan H, Thompson HL, Bluestone JA. Distinct effector mechanisms in the development of autoimmune neuropathy versus diabetes in nonobese diabetic mice. THE JOURNAL OF IMMUNOLOGY 2005; 175:5649-55. [PMID: 16237054 DOI: 10.4049/jimmunol.175.9.5649] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
NOD mice deficient for the costimulatory molecule B7-2 (NOD-B7-2KO mice) are protected from autoimmune diabetes but develop a spontaneous autoimmune peripheral neuropathy that resembles human diseases Guillain-Barre syndrome and chronic inflammatory demyelinating polyradiculoneuropathy. Similar observations have now been made in conventional NOD mice. We have shown previously that this disease was mediated by autoreactive T cells inducing demyelination in the peripheral nervous system. In this study, we analyzed the molecular pathways involved in the disease. Our data showed that neuropathy developed in the absence of perforin or fas, suggesting that classic cytotoxicity pathways were dispensable for nerve damage in NOD-B7-2KO mice. In contrast, IFN-gamma played an obligatory role in the development of neuropathy as demonstrated by the complete protection from disease and infiltration in the nerves in NOD-B7-2KO mice deficient for IFN-gamma. This result was consistent with the inflammatory phenotype of T cells infiltrating the peripheral nerves. Importantly, the relative role of perforin, fas, and IFN-gamma appears completely different in autoimmune diabetes vs neuropathy. Thus, there are sharp contrasts in the pathogenesis of autoimmune diseases targeting different tissues in the same NOD background.
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Affiliation(s)
- Hélène Bour-Jordan
- University of California, San Francisco (UCSF) Diabetes Center, Department of Medicine, University of California, San Francisco, CA 94143, USA
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24
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Miletic H, Utermöhlen O, Wedekind C, Hermann M, Stenzel W, Lassmann H, Schlüter D, Deckert M. P0(106-125) is a neuritogenic epitope of the peripheral myelin protein P0 and induces autoimmune neuritis in C57BL/6 mice. J Neuropathol Exp Neurol 2005; 64:66-73. [PMID: 15715086 DOI: 10.1093/jnen/64.1.66] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The present study describes a new model of autoimmune neuritis in C57BL/6 mice induced by immunization with the novel neuritogenic epitope P0(106-125), derived from mouse peripheral myelin protein P0. Immunization with this peptide in combination with pertussis toxin induced high levels of peptide-specific CD4+ T cells in spleen and popliteal lymph nodes. Clinical symptoms of autoimmune neuritis started with a flaccid tail at day 10 postimmunization (p.i.), progressed to moderate paraparesis at day 15 p.i., declining thereafter with undetectable symptoms at day 40 p.i. Clinical disease activity paralleled decreased sciatic nerve motor conduction and histopathologic alterations of sciatic nerves. These included inflammatory infiltrates, mainly consisting of inducible nitric oxide synthase (iNOS)+ macrophages and CD4+ T cells. These data fit into the pathogenetic concept of murine autoimmune neuritis as a CD4+ TH1 cell-mediated disease. Our new mouse model provides an attractive tool to identify critical factors that regulate the severity of autoimmune responses in the peripheral nervous system.
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MESH Headings
- Amino Acid Sequence
- Animals
- CD4-Positive T-Lymphocytes/immunology
- CD4-Positive T-Lymphocytes/metabolism
- Epitopes, T-Lymphocyte/administration & dosage
- Epitopes, T-Lymphocyte/genetics
- Epitopes, T-Lymphocyte/immunology
- Injections, Subcutaneous
- Lymph Nodes/cytology
- Lymph Nodes/immunology
- Lymph Nodes/metabolism
- Male
- Mice
- Mice, Inbred C57BL
- Molecular Sequence Data
- Myelin P0 Protein/administration & dosage
- Myelin P0 Protein/genetics
- Myelin P0 Protein/immunology
- Neuritis, Autoimmune, Experimental/genetics
- Neuritis, Autoimmune, Experimental/immunology
- Neuritis, Autoimmune, Experimental/pathology
- Peptide Fragments/administration & dosage
- Peptide Fragments/genetics
- Peptide Fragments/immunology
- Spleen/cytology
- Spleen/immunology
- Spleen/metabolism
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Affiliation(s)
- Hrvoje Miletic
- Abteilung für Neuropathologie, Universität zu Köln, Germany
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25
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Abstract
The interferon-gamma (IFN-gamma)/interleukin-12 (IL-12) pathway is a pivotal player in the immune system and is central to controlling mycobacterial infections. We highlight the most recent and relevant advances in understanding this pathway and their repercussions on basic and clinical science. Human mutations in IFN-gamma receptor-1 (IFN-gammaR1), IFN-gammaR2, IL-12p40, IL-12 receptor-beta1, signal transducer and activator of transcription-1, and nuclear factor-kappaB essential modulator are analyzed in the context of genetic susceptibility to mycobacterial diseases. A diagnostic and therapeutic approach is described. The IFN-gamma/IL-12 pathway is central in immune control of both environmental and autochthonous challenges, as reflected in human mutations and animal models. Besides being crucial for mycobacterial control, the IFN-gamma/IL-12 pathway is also involved in the pathogenesis of autoimmune disease as well as tumor development and control. Genotype-phenotype correlations have been established for certain genes in this pathway, some of which have therapeutic implications.
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Affiliation(s)
- Sergio D Rosenzweig
- Division of Immunology, Department of Pediatrics, Hospital Nacional de Pediatría Juan P. Garrahan, Buenos Aires, Argentina
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26
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Rosenzweig SD, Schwartz OM, Brown MR, Leto TL, Holland SM. Characterization of a dipeptide motif regulating IFN-gamma receptor 2 plasma membrane accumulation and IFN-gamma responsiveness. THE JOURNAL OF IMMUNOLOGY 2004; 173:3991-9. [PMID: 15356148 DOI: 10.4049/jimmunol.173.6.3991] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The IFN-gammaR complex is composed of two IFN-gammaR1 and two IFN-gammaR2 polypeptide chains. Although IFN-gammaR1 is constitutively expressed on all nucleated cells, IFN-gammaR2 membrane display is selective and tightly regulated. We created a series of fluorescent-tagged IFN-gammaR2 expression constructs to follow the molecule's cell surface expression and intracellular distribution. Truncation of the receptor immediately upstream of Leu-Ile 255-256 (254X) created a receptor devoid of signaling that overaccumulated on the cell surface. In addition, this truncated receptor inhibited wild-type IFN-gammaR2 activity and therefore exerted a dominant negative effect. In-frame deletion (255Delta2) or alanine substitution (LI255-256AA) of these amino acids created mutants that overaccumulated on the plasma membrane, but had enhanced function. Single amino acid substitutions (L255A or I256A) had a more modest effect. In-frame deletions upstream (253Delta2), but not downstream (257Delta2), of Leu-Ile 255-256 also led to overaccumulation. A truncation within the IFN-gammaR2 Jak2 binding site (270X) led to a mutant devoid of function that did not overaccumulate and did not affect wild-type IFN-gammaR2 signaling. We have created a series of novel mutants of IFN-gammaR2 that have facilitated the identification of intracellular domains that control IFN-gammaR2 accumulation and IFN-gamma responsiveness. In contrast to IFN-gammaR1, not only dominant negative, but also dominant gain-of-function, mutations were created through manipulation of IFN-gammaR2 Leu-Ile 255-256. These IFN-gammaR2 mutants will allow fine dissection of the role of IFN-gamma signaling in immunity.
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Affiliation(s)
- Sergio D Rosenzweig
- Laboratory of Host Defenses, National Institutes of Allergy and Infectious Diseases, National Institutes of Health, Department of Health and Human Services, Bethesda, MD 20892, USA
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27
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Yu S, Duan RS, Chen Z, Quezada HC, Bao L, Nennesmo I, Zhu SW, Winblad B, Ljunggren HG, Zhu J. Increased susceptibility to experimental autoimmune neuritis after upregulation of the autoreactive T cell response to peripheral myelin antigen in apolipoprotein E-deficient mice. J Neuropathol Exp Neurol 2004; 63:120-8. [PMID: 14989598 DOI: 10.1093/jnen/63.2.120] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Experimental autoimmune neuritis (EAN), an acute demyelinating inflammatory disease of the peripheral nervous system (PNS), is a good model for the human counterpart, Guillain-Barré syndrome. Apolipoprotein E (ApoE), a 34 kDa glycosylated protein with multiple biological properties, has been linked both with the innate immune response of mice and with neurological disease. The present study investigated the previously unexplored role of ApoE in autoimmune-mediated demyelination. ApoE-deficient (apoE -/-) mice exhibited a greater susceptibility to EAN induced by the PNS myelin P0 protein peptide 180-199, as compared to wild type (apoE +/+) mice. The augmented susceptibility seen in apoE -/- mice was associated with increased inflammatory cell infiltrates in the PNS during the effector phase. Although the 2 groups of mice exhibited no quantitative or proportional differences in splenic lymphocyte populations, the apoE -/- mice showed enhanced antigen-specific proliferation of T cells of spleen, which is related to modified macrophage function, upregulation of Th1 and downregulation of Th2-autoreactive responses to P0 peptide. These effects were shown as increased numbers of IFN-gamma expressing cells in the spleen and of IFN-gamma, IL-12 and TNF-alpha expressing cells in the PNS, as well as a decreased IL-10 production by splenic cells in apoE -/- mice. In addition, apoE -/- mice had enhanced antigen-specific antibody responses, which might have contributed to their aggravated EAN. These data provide strong evidence that apoE acts as an inhibitor of this inflammatory and demyelinating disease by upregulating IL-10, as well as by inhibiting Th1 responses and antigen-specific antibody formation. These data may aid the development of new and more effective therapeutic strategies for inflammatory and demyelinating diseases such as Guillain-Barré syndrome.
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Affiliation(s)
- Shuo Yu
- Division of Experimental Geriatrics, Department of Neurotec, Karolinska Institutet, Huddinge University Hospital, Stockholm, Sweden
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28
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Abstract
PURPOSE OF REVIEW The aim of this review is to highlight the most recent and relevant advances in the interferon-gamma/interleukin-12 pathway, a pivotal player of the immune system, and their repercussions on basic and clinical aspects of science. RECENT FINDINGS Newly described mutations are helping us to dissect the interferon-gamma/interleukin-12 pathway and its role in genetic infectious susceptibility and autoimmunity, and to reevaluate the pathophysiologic mechanisms involved in dominant and recessively inherited mutations. SUMMARY The interferon-gamma/interleukin-12 pathway plays a central role in immune control of both environmental and autochthonous challenges, as reflected in human mutations and animal models. Besides being crucial for mycobacterial control, the interferon-gamma/interleukin-12 pathway is also involved in the pathogenesis of autoimmune disease, as well as tumor development and control. Genotype-phenotype correlations have been established for certain mutants in this pathway, some of which have therapeutic implications.
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Affiliation(s)
- Sergio D Rosenzweig
- Division of Immunology, Department of Pediatrics, Hospital Nacional de Pediatría Juan P. Garrahan, Buenos Aires, Argentina
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29
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Zou LP, Abbas N, Volkmann I, Nennesmo I, Levi M, Wahren B, Winblad B, Hedlund G, Zhu J. Suppression of experimental autoimmune neuritis by ABR-215062 is associated with altered Th1/Th2 balance and inhibited migration of inflammatory cells into the peripheral nerve tissue. Neuropharmacology 2002; 42:731-9. [PMID: 11985832 DOI: 10.1016/s0028-3908(02)00015-1] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The therapeutic effects of ABR-215062, which is a new immunoregulator derived from Linomide, have been evaluated in experimental autoimmune neuritis (EAN), a CD4(+) T cell-mediated animal model of Guillain-Barré syndrome in man. In previous studies, we reported that Linomide suppressed the clinical EAN and myelin antigen-reactive T and B cell responses. Here EAN induced in Lewis rats by inoculation with peripheral nerve myelin P0 protein peptide 180-199 and Freund's complete adjuvant was strongly suppressed by ABR-215062 administered daily subcutaneously from the day of inoculation. ABR-215062 dose-dependently reduced the incidence of EAN, ameliorated clinical signs and inhibited P0 peptide 180-199-specific T cell responses as well as also the decreased inflammation and demyelination in the peripheral nerves. The suppression of clinical EAN was associated with inhibition of the inflammatory cytokines IFN-gamma and TNF-alpha, as well as the enhancement of anti-inflammatory cytokine IL-4 in lymph node cells and periphery nerve tissues, respectively, in a dose-dependent manner. These effects indicate that ABR-215062 may mediate its effects by regulation of Th1/Th2 cytokine balance and suggest that ABR-215062 is potentially a new chemical entity for effective treatment of autoimmune diseases.
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MESH Headings
- Adjuvants, Immunologic/chemistry
- Adjuvants, Immunologic/pharmacology
- Adjuvants, Immunologic/therapeutic use
- Animals
- Cell Movement/drug effects
- Cell Movement/immunology
- Dose-Response Relationship, Drug
- Dose-Response Relationship, Immunologic
- Hydroxyquinolines/chemistry
- Hydroxyquinolines/pharmacology
- Hydroxyquinolines/therapeutic use
- Injections, Subcutaneous
- Interferon-gamma/biosynthesis
- Male
- Neuritis, Autoimmune, Experimental/immunology
- Neuritis, Autoimmune, Experimental/pathology
- Neuritis, Autoimmune, Experimental/prevention & control
- Peripheral Nerves/drug effects
- Peripheral Nerves/immunology
- Peripheral Nerves/metabolism
- Peripheral Nerves/pathology
- Quinolones
- Rats
- Rats, Inbred Lew
- Th1 Cells/drug effects
- Th1 Cells/immunology
- Th1 Cells/metabolism
- Th2 Cells/drug effects
- Th2 Cells/immunology
- Th2 Cells/metabolism
- Tumor Necrosis Factor-alpha/biosynthesis
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Affiliation(s)
- L-P Zou
- Division of Geriatric Medicine, Department of Clinical Neuroscience, Karolinska Institute, Huddinge University Hospital, Stockholm, Sweden
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