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Das N, Menon NG, de Almeida LGN, Woods PS, Heynen ML, Jay GD, Caffery B, Jones L, Krawetz R, Schmidt TA, Dufour A. Proteomics Analysis of Tears and Saliva From Sjogren's Syndrome Patients. Front Pharmacol 2021; 12:787193. [PMID: 34950038 PMCID: PMC8689002 DOI: 10.3389/fphar.2021.787193] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 11/02/2021] [Indexed: 12/17/2022] Open
Abstract
Sjogren's syndrome (SS) is characterized by dysfunctional mucous membranes and dysregulated moisture-secreting glands resulting in various symptoms, including dry mouth and dry eyes. Here, we wanted to profile and compare the tear and saliva proteomes of SS patients to healthy controls. Tear and saliva samples were collected and subjected to an isotopic dimethylation labeling shotgun proteomics workflow to identify alterations in protein levels. In tear samples, we identified 83 upregulated and 112 downregulated proteins. Pathway enrichment analysis of the changing proteins by Metascape identified leukocyte transendothelial migration, neutrophil degranulation, and post-translation protein phosphorylation in tears of SS patients. In healthy controls' tears, an enrichment for proteins related to glycolysis, amino acid metabolism and apoptotic signaling pathway were identified. In saliva, we identified 108 upregulated and 45 downregulated proteins. Altered pathways in SS patients' saliva included cornification, sensory perception to taste and neutrophil degranulation. In healthy controls' saliva, an enrichment for proteins related to JAK-STAT signaling after interleukin-12 stimulation, phagocytosis and glycolysis in senescence were identified. Dysregulated protease activity is implicated in the initiation of inflammation and immune cell recruitment in SS. We identified 20 proteases and protease inhibitors in tears and 18 in saliva which are differentially expressed between SS patients and healthy controls. Next, we quantified endogenous proteoglycan 4 (PRG4), a mucin-like glycoprotein, in tear wash and saliva samples via a bead-based immune assay. We identified decreased levels of PRG4 in SS patients' tear wash compared to normal samples. Conversely, in saliva, we found elevated levels of PRG4 concentration and visualized PRG4 expression in human parotid gland via immunohistological staining. These findings will improve our mechanistic understanding of the disease and changes in SS patients' protein expression will help identify new potential drug targets. PRG4 is among the promising targets, which we identified here, in saliva, for the first time.
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Affiliation(s)
- Nabangshu Das
- Departments of Physiology and Pharmacology and Kinesiology, University of Calgary, Calgary, AB, Canada
- McCaig Institute, University of Calgary, Calgary, AB, Canada
| | - Nikhil G. Menon
- Department of Biomedical Engineering, School of Dental Medicine, UConn Health, Farmington, CT, United States
| | - Luiz G. N. de Almeida
- Departments of Physiology and Pharmacology and Kinesiology, University of Calgary, Calgary, AB, Canada
- McCaig Institute, University of Calgary, Calgary, AB, Canada
| | - Paige S. Woods
- Department of Emergency Medicine, Warren Alpert Medical School and School of Engineering, Brown University, Providence, RI, United States
| | - Miriam L. Heynen
- Centre for Ocular Research and Education (CORE), School of Optometry and Vision Science, University of Waterloo, Waterloo, ON, Canada
| | - Gregory D. Jay
- Department of Emergency Medicine, Warren Alpert Medical School and School of Engineering, Brown University, Providence, RI, United States
| | | | - Lyndon Jones
- Centre for Ocular Research and Education (CORE), School of Optometry and Vision Science, University of Waterloo, Waterloo, ON, Canada
| | - Roman Krawetz
- McCaig Institute, University of Calgary, Calgary, AB, Canada
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, AB, Canada
| | - Tannin A. Schmidt
- McCaig Institute, University of Calgary, Calgary, AB, Canada
- Department of Biomedical Engineering, School of Dental Medicine, UConn Health, Farmington, CT, United States
| | - Antoine Dufour
- Departments of Physiology and Pharmacology and Kinesiology, University of Calgary, Calgary, AB, Canada
- McCaig Institute, University of Calgary, Calgary, AB, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
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Marczynski P, Meineck M, Xia N, Li H, Kraus D, Roth W, Möckel T, Boedecker S, Schwarting A, Weinmann-Menke J. Vascular Inflammation and Dysfunction in Lupus-Prone Mice-IL-6 as Mediator of Disease Initiation. Int J Mol Sci 2021; 22:ijms22052291. [PMID: 33669022 PMCID: PMC7956579 DOI: 10.3390/ijms22052291] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 02/16/2021] [Accepted: 02/21/2021] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND Systemic lupus erythematosus (SLE) is a chronic inflammatory autoimmune disease and patients are under an increased risk for cardiovascular (CV) events and mortality. The increased CV risk for patients with SLE seems to be caused by a premature and accelerated atherosclerosis, attributable to lupus-specific risk factors (i.e., increased systemic inflammation, altered immune status), apart from traditional CV risk factors. To date, there is no established experimental model to explore the pathogenesis of this increased CV risk in SLE patients. METHODS Here we investigated whether MRL-Faslpr mice, which develop an SLE-like phenotype, may serve as a model to study lupus-mediated vascular disease. Therefore, MRL-Faslpr, MRL-++, and previously generated Il6-/- MRL-Faslpr mice were used to evaluate vascular changes and possible mechanisms of vascular dysfunction and damage. RESULTS Contrary to MRL-++ control mice, lupus-prone MRL-Faslpr mice exhibited a pronounced vascular and perivascular leukocytic infiltration in various organs; expression of pro-inflammatory cytokines in the aorta and kidney was augmented; and intima-media thickness of the aorta was increased. IL-6 deficiency reversed these changes and restored aortic relaxation. CONCLUSION Our findings demonstrate that the MRL-Faslpr mouse model is an excellent tool to investigate vascular damage in SLE mice. Moreover, IL-6 promotes vascular inflammation and damage and could potentially be a therapeutic target for the treatment of accelerated arteriosclerosis in SLE.
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Affiliation(s)
- Paul Marczynski
- Department of Nephrology and Rheumatology, University Center of Autoimmunity, Johannes-Gutenberg University Mainz, 55131 Mainz, Germany; (P.M.); (M.M.); (D.K.); (T.M.); (S.B.); (A.S.)
| | - Myriam Meineck
- Department of Nephrology and Rheumatology, University Center of Autoimmunity, Johannes-Gutenberg University Mainz, 55131 Mainz, Germany; (P.M.); (M.M.); (D.K.); (T.M.); (S.B.); (A.S.)
| | - Ning Xia
- Institute of Pharmacology, Johannes-Gutenberg University Mainz, 55131 Mainz, Germany; (N.X.); (H.L.)
| | - Huige Li
- Institute of Pharmacology, Johannes-Gutenberg University Mainz, 55131 Mainz, Germany; (N.X.); (H.L.)
| | - Daniel Kraus
- Department of Nephrology and Rheumatology, University Center of Autoimmunity, Johannes-Gutenberg University Mainz, 55131 Mainz, Germany; (P.M.); (M.M.); (D.K.); (T.M.); (S.B.); (A.S.)
| | - Wilfried Roth
- Institute of Pathology, Medical Center of the Johannes-Gutenberg University Mainz, 55131 Mainz, Germany;
| | - Tamara Möckel
- Department of Nephrology and Rheumatology, University Center of Autoimmunity, Johannes-Gutenberg University Mainz, 55131 Mainz, Germany; (P.M.); (M.M.); (D.K.); (T.M.); (S.B.); (A.S.)
| | - Simone Boedecker
- Department of Nephrology and Rheumatology, University Center of Autoimmunity, Johannes-Gutenberg University Mainz, 55131 Mainz, Germany; (P.M.); (M.M.); (D.K.); (T.M.); (S.B.); (A.S.)
| | - Andreas Schwarting
- Department of Nephrology and Rheumatology, University Center of Autoimmunity, Johannes-Gutenberg University Mainz, 55131 Mainz, Germany; (P.M.); (M.M.); (D.K.); (T.M.); (S.B.); (A.S.)
| | - Julia Weinmann-Menke
- Department of Nephrology and Rheumatology, University Center of Autoimmunity, Johannes-Gutenberg University Mainz, 55131 Mainz, Germany; (P.M.); (M.M.); (D.K.); (T.M.); (S.B.); (A.S.)
- Correspondence: ; Tel.: +49-6131-176774; Fax: +49-6131-17476774
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Sharma D, Malik A, Guy C, Vogel P, Kanneganti TD. TNF/TNFR axis promotes pyrin inflammasome activation and distinctly modulates pyrin inflammasomopathy. J Clin Invest 2018; 129:150-162. [PMID: 30457980 DOI: 10.1172/jci121372] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 10/09/2018] [Indexed: 12/22/2022] Open
Abstract
Pyrin is an inflammasome sensor that promotes caspase-1-mediated pyroptotic cell death and maturation of proinflammatory cytokines IL-1β and IL-18. Familial Mediterranean fever (FMF), an autoinflammatory disorder, is associated with mutations in the gene encoding pyrin (MEFV). FMF-knockin (FMF-KI) mice that express chimeric pyrin protein with FMF mutation (MefvV726A/V726A) exhibit an autoinflammatory disorder mediated by autoactivation of the pyrin inflammasome. Increase in the levels of TNF are observed in FMF-KI mice, and many features of FMF overlap with the autoinflammatory disorder associated with TNF receptor signaling. In this study, we assessed the contribution of TNF signaling to pyrin inflammasome activation and its consequent role in distinct FMF pathologies. TNF signaling promoted the expression of pyrin in response to multiple stimuli and was required for inflammasome activation in response to canonical pyrin stimuli and in myeloid cells from FMF-KI mice. TNF signaling promoted systemic wasting, anemia, and neutrophilia in the FMF-KI mice. Further, TNF-induced pathology was induced specifically through the TNFR1 receptor, while TNFR2-mediated signaling was distinctly protective in colitis and ankle joint inflammation. Overall, our data show that TNF is a critical modulator of pyrin expression, inflammasome activation, and pyrin-inflammasomopathy. Further, specific blockade of TNFR1 or activation of TNFR2 could provide substantial protection against FMF pathologies.
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Affiliation(s)
| | | | | | - Peter Vogel
- Animal Resources Center and the Veterinary Pathology Core, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
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Bendorius M, Po C, Muller S, Jeltsch-David H. From Systemic Inflammation to Neuroinflammation: The Case of Neurolupus. Int J Mol Sci 2018; 19:E3588. [PMID: 30428632 PMCID: PMC6274746 DOI: 10.3390/ijms19113588] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 11/06/2018] [Accepted: 11/09/2018] [Indexed: 12/17/2022] Open
Abstract
It took decades to arrive at the general consensus dismissing the notion that the immune system is independent of the central nervous system. In the case of uncontrolled systemic inflammation, the relationship between the two systems is thrown off balance and results in cognitive and emotional impairment. It is specifically true for autoimmune pathologies where the central nervous system is affected as a result of systemic inflammation. Along with boosting circulating cytokine levels, systemic inflammation can lead to aberrant brain-resident immune cell activation, leakage of the blood⁻brain barrier, and the production of circulating antibodies that cross-react with brain antigens. One of the most disabling autoimmune pathologies known to have an effect on the central nervous system secondary to the systemic disease is systemic lupus erythematosus. Its neuropsychiatric expression has been extensively studied in lupus-like disease murine models that develop an autoimmunity-associated behavioral syndrome. These models are very useful for studying how the peripheral immune system and systemic inflammation can influence brain functions. In this review, we summarize the experimental data reported on murine models developing autoimmune diseases and systemic inflammation, and we explore the underlying mechanisms explaining how systemic inflammation can result in behavioral deficits, with a special focus on in vivo neuroimaging techniques.
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Affiliation(s)
- Mykolas Bendorius
- UMR 7242 Biotechnologie et Signalisation Cellulaire, École Supérieure de Biotechnologie de Strasbourg (ESBS), Laboratoire d'Excellence Médalis, Université de Strasbourg/CNRS, 67412 Illkirch, France.
| | - Chrystelle Po
- ICube UMR 7357, Université de Strasbourg/CNRS, Fédération de Médecine Translationnelle de Strasbourg, 67000 Strasbourg, France.
| | - Sylviane Muller
- UMR 7242 Biotechnologie et Signalisation Cellulaire, École Supérieure de Biotechnologie de Strasbourg (ESBS), Laboratoire d'Excellence Médalis, Université de Strasbourg/CNRS, 67412 Illkirch, France.
- University of Strasbourg Institute for Advanced Study (USIAS), 67000 Strasbourg, France.
| | - Hélène Jeltsch-David
- UMR 7242 Biotechnologie et Signalisation Cellulaire, École Supérieure de Biotechnologie de Strasbourg (ESBS), Laboratoire d'Excellence Médalis, Université de Strasbourg/CNRS, 67412 Illkirch, France.
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5
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Abstract
The link between systemic autoimmunity, brain pathology, and aberrant behavior is still a largely unexplored field of biomedical science. Accumulating evidence points to causal relationships between immune factors, neurodegeneration, and neuropsychiatric manifestations. By documenting autoimmunity-associated neuronal degeneration and cytotoxicity of the cerebrospinal fluid from disease-affected subjects, the murine MRL model had shown high validity in revealing principal pathogenic circuits. In addition, unlike any other autoimmune strain, MRL mice produce antibodies commonly found in patients suffering from lupus and other autoimmune disorders. This review highlights importance of the MRL model as a useful preparation in understanding the links between immune system and brain function.
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Affiliation(s)
- Boris Šakić
- Department of Psychiatry and Behavioral Neurosciences, McMaster University, Hamilton, ON, Canada.
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6
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Abstract
Mycophenolate mofetil (MMF) has been reproducibly shown to inhibit lymphocyte adhesion and penetration of endothelial cell surfaces. The mechanism is not yet elucidated. In vitro studies on the effects of MMF on cell adhesion molecules (CAM) using human umbilical vein endothelial cells (HUVEC) have shown conflicting results. Different studies have independently shown that MMF increased, decreased or had no effect on intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule (VCAM-1). Several studies suggest MMF may reduce the endothelial expression of E-selectin. Recent studies have been unable to replicate initial work, which suggested that MMF impaired glycosylation of lymphocyte CAM. The same studies concluded that MMF had no effect on the surface expression of lymphocyte CAM, but altered the binding ability of these molecules. ICAM-1/LFA-1 (lymphocyte function-associated antigen-1), VCAM-1/VLA-4 (very late antigen-4) and P-selectin/PSGL-1 (P-selectin glycoprotein ligand-1) ligand pairs are most likely to be involved. Few in vivo and no conclusive human studies have been carried out. The literature relevant to cell adhesion molecules in systemic lupus erythematosus (SLE) is reviewed in detail.
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Affiliation(s)
- MJ Lewis
- Lupus Research Unit, The Rayne Institute, St Thomas’ Hospital, London, UK
| | - D D'cruz
- Lupus Research Unit, The Rayne Institute, St Thomas’ Hospital, London, UK
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7
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Abstract
Mycophenolate mofetil (MMF) has been reproducibly shown to inhibit lymphocyte adhesion and penetration of endothelial cell surfaces. The mechanism is not yet elucidated. In vitro studies on the effects of MMF on cell adhesion molecules (CAM) using human umbilical vein endothelial cells (HUVEC) have shown conflicting results. Different studies have independently shown that MMF increased, decreased or had no effect on intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule (VCAM-1). Several studies suggest MMF may reduce the endothelial expression of E-selectin. Recent studies have been unable to replicate initial work, which suggested that MMF impaired glycosylation of lymphocyte CAM. The same studies concluded that MMF had no effect on the surface expression of lymphocyte CAM, but altered the binding ability of these molecules. ICAM-1/LFA-1 (lymphocyte function-associated antigen-1), VCAM-1/VLA-4 (very late antigen-4) and P-selectin/PSGL-1 (P-selectin glycoprotein ligand-1) ligand pairs are most likely to be involved. Few in vivo and no conclusive human studies have been carried out. The literature relevant to cell adhesion molecules in systemic lupus erythematosus (SLE) is reviewed in detail.
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Affiliation(s)
- M J Lewis
- The Rayne Institute, St Thomas' Hospital, London, UK.
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8
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Improved monitoring of clinical response in Systemic Lupus Erythematosus by longitudinal trend in soluble vascular cell adhesion molecule-1. Arthritis Res Ther 2016; 18:5. [PMID: 26746423 PMCID: PMC4718032 DOI: 10.1186/s13075-015-0896-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Accepted: 12/10/2015] [Indexed: 12/22/2022] Open
Abstract
Background To determine whether optimal use of serial measurements of serum levels of soluble cell adhesion molecules (CAM) can improve monitoring of disease activity in SLE. Methods Serum levels of soluble CAM and conventional SLE biomarkers were measured in serial samples (n = 80) from 21 SLE patients during and after flare and correlated in longitudinal analysis with disease activity determined by ECLAM score. Blood samples from a second cohort of 34 SLE patients were subject to flow cytometry to correlate serum biomarkers with B cell subsets. Results By adjusting for the baseline level (at the first visit), delta soluble vascular cell adhesion molecule-1 (sVCAM-1) showed stronger correlation with changes in ECLAM score and improved sensitivity and specificity for identifying SLE responders versus non-responders compared to conventional SLE biomarkers including anti-dsDNA antibody titre and complement C3. Multiple regression analysis identified delta sVCAM-1 as the best marker of SLE clinical response. sVCAM-1 levels were significantly correlated with CD95+CD27+ activated memory B cells, CD95+ plasmablasts and circulating plasma cell numbers in SLE patients. Conclusion Subtracting a baseline level of sVCAM-1 for each individual substantially improved its utility as a biomarker. Delta sVCAM-1 was superior to conventional SLE biomarkers for monitoring changes in disease activity. This suggests that serial monitoring of serum sVCAM-1 trends should be considered in SLE patients to document responses to treatment. We hypothesise that the correlation between activated B cell subsets and circulating plasma cell numbers with soluble VCAM-1 serum levels in SLE may relate to the important role of VCAM-1 in B lymphocyte survival and maturation in bone marrow and secondary lymphoid tissues. Electronic supplementary material The online version of this article (doi:10.1186/s13075-015-0896-7) contains supplementary material, which is available to authorized users.
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9
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Selectin-mediated leukocyte trafficking during the development of autoimmune disease. Autoimmun Rev 2015; 14:984-95. [DOI: 10.1016/j.autrev.2015.06.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 06/18/2015] [Indexed: 12/18/2022]
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10
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Stielke S, Keilhoff G, Kirches E, Mertens PR, Neumann KH, Tsokos GC, Mawrin C. Adhesion molecule expression precedes brain damages of lupus-prone mice and correlates with kidney pathology. J Neuroimmunol 2012; 252:24-32. [DOI: 10.1016/j.jneuroim.2012.07.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Revised: 07/10/2012] [Accepted: 07/18/2012] [Indexed: 01/01/2023]
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11
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Macrophages and neutrophils in SLE—An online molecular catalog. Autoimmun Rev 2012; 11:365-72. [DOI: 10.1016/j.autrev.2011.10.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2011] [Accepted: 10/11/2011] [Indexed: 12/14/2022]
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12
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Sakić B. The MRL model: an invaluable tool in studies of autoimmunity-brain interactions. Methods Mol Biol 2012; 934:277-99. [PMID: 22933151 DOI: 10.1007/978-1-62703-071-7_14] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The link between systemic autoimmunity, brain pathology, and aberrant behavior is still largely unexplored field of biomedical science. Accumulating evidence points to causal relationships between immune factors, neurodegeneration, and neuropsychiatric manifestations. By documenting autoimmunity-associated neuronal degeneration and cytotoxicity of the cerebrospinal fluid from disease-affected subjects, the murine MRL model had shown high validity in revealing principal pathogenic circuits. In addition, unlike any other autoimmune strain, MRL mice produce antibodies commonly found in patients suffering from lupus and other autoimmune disorders. This review highlights importance of the MRL model as an indispensible preparation in understanding the links between immune system and brain function.
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Affiliation(s)
- Boris Sakić
- Department of Psychiatry and Behavioral Neurosciences, McMaster University, Hamilton, ON, Canada.
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13
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Alexander JJ, Jacob A, Cunningham P, Hensley L, Quigg RJ. TNF is a key mediator of septic encephalopathy acting through its receptor, TNF receptor-1. Neurochem Int 2007; 52:447-56. [PMID: 17884256 PMCID: PMC3191465 DOI: 10.1016/j.neuint.2007.08.006] [Citation(s) in RCA: 137] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2007] [Revised: 07/17/2007] [Accepted: 08/09/2007] [Indexed: 12/21/2022]
Abstract
In this study, we demonstrate that mice deficient in TNFR1 (TNFR1(-/-)) were resistant to LPS-induced encephalopathy. Systemic administration of lipopolysaccharide (LPS) induces a widespread inflammatory response similar to that observed in sepsis. Following LPS administration TNFR1(-/-) mice had less caspase-dependent apoptosis in brain cells and fewer neutrophils infiltrating the brain (p<0.039), compared to control C57Bl6 (TNFR1(+/+)) mice. TNFR1-dependent increase in aquaporin (AQP)-4 mRNA and protein expression was observed with a concomitant increase in water content, in brain (18% increase in C57Bl6 mice treated with LPS versus those treated with saline), similar to cerebral edema observed in sepsis. Furthermore, absence of TNFR1 partially but significantly reduced the activation of astrocytes, as shown by immunofluorescence and markedly inhibited iNOS mRNA expression (p<0.01). Septic encephalopathy is a devastating complication of sepsis. Although, considerable work has been done to identify the mechanism causing the pathological alterations in this setting, the culprit still remains an enigma. Our results demonstrate for the first time that endotoxemia leads to inflammation in brain, with alteration in blood-brain barrier, up-regulation of AQP4 and associated edema, neutrophil infiltration, astrocytosis, as well as apoptotic cellular death, all of which appear to be mediated by TNF-alpha signaling through TNFR1.
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MESH Headings
- Animals
- Apoptosis/genetics
- Aquaporin 4/genetics
- Aquaporin 4/metabolism
- Astrocytes/metabolism
- Blood-Brain Barrier/metabolism
- Blood-Brain Barrier/physiopathology
- Brain/metabolism
- Brain/physiopathology
- Brain Diseases, Metabolic/metabolism
- Brain Diseases, Metabolic/pathology
- Brain Diseases, Metabolic/physiopathology
- Brain Edema/genetics
- Brain Edema/metabolism
- Brain Edema/physiopathology
- Chemotaxis, Leukocyte/genetics
- Encephalitis/metabolism
- Encephalitis/microbiology
- Encephalitis/physiopathology
- Gliosis/genetics
- Gliosis/metabolism
- Gliosis/physiopathology
- Inflammation Mediators/metabolism
- Lipopolysaccharides
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Nitric Oxide Synthase Type II/genetics
- RNA, Messenger/metabolism
- Receptors, Tumor Necrosis Factor, Type I/genetics
- Receptors, Tumor Necrosis Factor, Type I/metabolism
- Sepsis/complications
- Tumor Necrosis Factor-alpha/metabolism
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Affiliation(s)
- Jessy J Alexander
- Department of Medicine, University of Chicago, 5841 South Maryland Avenue, MC5100, Chicago, IL 60637, USA.
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14
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He X, Schoeb TR, Panoskaltsis-Mortari A, Zinn KR, Kesterson RA, Zhang J, Samuel S, Hicks MJ, Hickey MJ, Bullard DC. Deficiency of P-selectin or P-selectin glycoprotein ligand-1 leads to accelerated development of glomerulonephritis and increased expression of CC chemokine ligand 2 in lupus-prone mice. THE JOURNAL OF IMMUNOLOGY 2007; 177:8748-56. [PMID: 17142777 DOI: 10.4049/jimmunol.177.12.8748] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The selectins and their ligands mediate leukocyte rolling on endothelial cells, the initial step in the emigration cascade leading to leukocyte infiltration of tissue. These adhesion molecules have been shown to be key promoters of acute leukocyte emigration events; however, their roles in the development of long-term inflammatory responses, including those that occur during chronic inflammatory diseases such as systemic lupus erythematosus, are unclear. To assess participation of P-selectin in such disorders, we studied the progression of systemic lupus erythematosus-like disease in P-selectin-deficient and control MRL/MpJ-Fas(lpr) (Fas(lpr)) mice. Surprisingly, we found that P-selectin deficiency resulted in significantly earlier mortality, characterized by a more rapid development of glomerulonephritis and dermatitis. Expression of CCL2 (MCP-1) was increased in the kidneys of P-selectin mutant mice and in supernatants of LPS-stimulated primary renal endothelial cell cultures from these mice. A closely similar phenotype, including elevated renal expression of CCL2, was also observed in Fas(lpr) mice deficient in the major P-selectin ligand, P-selectin glycoprotein ligand-1. These results indicate that P-selectin and P-selectin glycoprotein ligand-1 are not required for leukocyte infiltration and the development of autoimmune disease in Fas(lpr) mice, but rather expression of these adhesion molecules is important for modulating the progression of glomerulonephritis, possibly through down-regulation of endothelial CCL2 expression.
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Affiliation(s)
- Xiaodong He
- Department of Genetics, University of Alabama at Birmingham, 720 South 20th Street, Birmingham, AL 35294, USA
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15
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Ballok DA. Neuroimmunopathology in a murine model of neuropsychiatric lupus. ACTA ACUST UNITED AC 2006; 54:67-79. [PMID: 17223198 PMCID: PMC2577581 DOI: 10.1016/j.brainresrev.2006.12.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2006] [Revised: 12/09/2006] [Accepted: 12/11/2006] [Indexed: 01/18/2023]
Abstract
Animal models are extremely useful tools in defining pathogenesis and treatment of human disease. For many years researchers believed that structural damage to the brain of neuropsychiatric (NP) patients lead to abnormal mental function, but this possibility was not extensively explored until recently. Imaging studies of NP-systemic lupus erythematosus (SLE) support the notion that brain cell death accounts for the emergence of neurologic and psychiatric symptoms, and evidence suggests that it is an autoimmunity-induced brain disorder characterized by profound metabolic alterations and progressive neuronal loss. While there are a number of murine models of SLE, this article reviews recent literature on the immunological connections to neurodegeneration and behavioral dysfunction in the Fas-deficient MRL model of NP-SLE. Probable links between spontaneous peripheral immune activation, the subsequent central autoimmune/inflammatory responses in MRL/MpJ-Tnfrsf6(lpr) (MRL-lpr) mice and the sequential mode of events leading to Fas-independent neurodegenerative autoimmune-induced encephalitis will be reviewed. The role of hormones, alternative mechanisms of cell death, the impact of central dopaminergic degeneration on behavior, and germinal layer lesions on developmental/regenerative capacity of MRL-lpr brains will also be explored. This model can provide direction for future therapeutic interventions in patients with this complex neuroimmunological syndrome.
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Affiliation(s)
- David A Ballok
- Department of Psychiatry and Behavioral Neurosciences, HSC Rm 4N4, McMaster University, 1200 Main St. West, Hamilton, Ontario, Canada L8N 3Z5.
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16
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Alexander JJ, Quigg RJ. Systemic lupus erythematosus and the brain: what mice are telling us. Neurochem Int 2006; 50:5-11. [PMID: 16989923 DOI: 10.1016/j.neuint.2006.08.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2006] [Revised: 07/26/2006] [Accepted: 08/22/2006] [Indexed: 01/18/2023]
Abstract
Neuropsychiatric symptoms occur in systemic lupus erythematosus (SLE), a complex, autoimmune disease of unknown origin. Although several pathogenic mechanisms have been suggested to play a significant role in the etiology of the disease, the exact underlying mechanisms still remain elusive. Several inbred strains of mice are used as models to study SLE, which exhibit a diversity of central nervous system (CNS) manifestations similar to that observed in patients. This review will attempt to give a brief overview of the CNS alterations observed in these models, including biochemical, structural and behavioral changes.
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Affiliation(s)
- Jessy J Alexander
- Department of Medicine, University of Chicago, 5841 South Maryland Avenue, MC5100, Chicago, IL 60637, United States.
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Kevil CG, Hicks MJ, He X, Zhang J, Ballantyne CM, Raman C, Schoeb TR, Bullard DC. Loss of LFA-1, but not Mac-1, protects MRL/MpJ-Fas(lpr) mice from autoimmune disease. THE AMERICAN JOURNAL OF PATHOLOGY 2004; 165:609-16. [PMID: 15277234 PMCID: PMC1618580 DOI: 10.1016/s0002-9440(10)63325-1] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Systemic lupus erythematosus (SLE) is an autoimmune disease characterized by immune complex-mediated tissue injury. Many different adhesion molecules are thought to participate in the development of SLE; however, few studies have directly examined the contributions of these proteins. Here we demonstrate that LFA-1 plays an essential role in the development of lupus in MRL/MpJ-Fas(lpr) mice. Mice deficient in LFA-1, but not Mac-1, showed significantly increased survival, decreased anti-DNA autoantibody formation, and reduced glomerulonephritis. The phenotype of the LFA-1-deficient mice was similar to that observed in beta(2) integrin-deficient (CD18-null) MRL/MpJ-Fas(lpr) mice, suggesting a lack of redundancy among the beta(2) integrin family members and other adhesion molecules. These studies identify LFA-1 as a key contributor in the pathogenesis of autoimmune disease in this model, and further suggest that therapeutic strategies targeting this adhesion molecule may be beneficial for the treatment of SLE.
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Affiliation(s)
- Christopher G Kevil
- Department of Pathology, Louisiana State University Health Sciences Center, Shreveport, LA, USA
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Hickey MJ. Alterations in leucocyte trafficking in lupus-prone mice: an examination of the MRL/faslpr mouse. Immunol Cell Biol 2003; 81:390-6. [PMID: 12969327 DOI: 10.1046/j.1440-1711.2003.01186.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Systemic lupus erythematosus (SLE) is an autoimmune disease involving inappropriate inflammatory responses in a wide range of organs. The recruitment of leucocytes to these sites of inflammation is one of the key events in the development of tissue injury in SLE. However, the mechanisms responsible for this aberrant recruitment are poorly understood. Several studies have demonstrated upregulation of endothelial adhesion molecule expression in tissue biopsies from SLE patients. However, the progression to analysis of the functional roles of these adhesion molecules has entailed the use of animal models of SLE. Much of this work has involved the use of the MRL/faslpr mouse model of systemic autoimmune disease. This mouse develops a systemic inflammatory disease with similarities to human SLE. This review summarizes work by our laboratory and others which have examined alterations in the mechanisms of leucocyte trafficking in the MRL/faslpr mouse. These experiments have revealed upregulation of key adhesion molecules, alterations in leucocyte-endothelial cell interactions and in some cases protective effects of deletion of endothelial adhesion molecules. From analysis of a range of microvasculatures in the MRL/faslpr mouse, it is becoming clear that the roles of specific adhesion molecules vary according to the tissue under analysis. Furthermore, analysis of MRL/faslpr mice with targeted deletions of specific adhesion molecules indicates that their roles in development and progression of disease can vary from having key contributions to the development of disease, to attenuating disease via as yet unidentified mechanisms.
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Affiliation(s)
- Michael J Hickey
- Centre for Inflammatory Diseases, Monash University Department of Medicine, Monash Medical Centre, Melbourne, Victoria, Australia.
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