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Djudjaj S, Lue H, Rong S, Papasotiriou M, Klinkhammer BM, Zok S, Klaener O, Braun GS, Lindenmeyer MT, Cohen CD, Bucala R, Tittel AP, Kurts C, Moeller MJ, Floege J, Ostendorf T, Bernhagen J, Boor P. Macrophage Migration Inhibitory Factor Mediates Proliferative GN via CD74. J Am Soc Nephrol 2015; 27:1650-64. [PMID: 26453615 DOI: 10.1681/asn.2015020149] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 08/24/2015] [Indexed: 01/09/2023] Open
Abstract
Pathologic proliferation of mesangial and parietal epithelial cells (PECs) is a hallmark of various glomerulonephritides. Macrophage migration inhibitory factor (MIF) is a pleiotropic cytokine that mediates inflammation by engagement of a receptor complex involving the components CD74, CD44, CXCR2, and CXCR4. The proliferative effects of MIF may involve CD74 together with the coreceptor and PEC activation marker CD44. Herein, we analyzed the effects of local glomerular MIF/CD74/CD44 signaling in proliferative glomerulonephritides. MIF, CD74, and CD44 were upregulated in the glomeruli of patients and mice with proliferative glomerulonephritides. During disease, CD74 and CD44 were expressed de novo in PECs and colocalized in both PECs and mesangial cells. Stress stimuli induced MIF secretion from glomerular cells in vitro and in vivo, in particular from podocytes, and MIF stimulation induced proliferation of PECs and mesangial cells via CD74. In murine crescentic GN, Mif-deficient mice were almost completely protected from glomerular injury, the development of cellular crescents, and the activation and proliferation of PECs and mesangial cells, whereas wild-type mice were not. Bone marrow reconstitution studies showed that deficiency of both nonmyeloid and bone marrow-derived Mif reduced glomerular cell proliferation and injury. In contrast to wild-type mice, Cd74-deficient mice also were protected from glomerular injury and ensuing activation and proliferation of PECs and mesangial cells. Our data suggest a novel molecular mechanism and glomerular cell crosstalk by which local upregulation of MIF and its receptor complex CD74/CD44 mediate glomerular injury and pathologic proliferation in GN.
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Affiliation(s)
- Sonja Djudjaj
- Department of Pathology, Department of Nephrology and Immunology, and
| | - Hongqi Lue
- Institute of Biochemistry and Molecular Cell Biology, RWTH Aachen University, Aachen, Germany
| | - Song Rong
- Department of Nephrology and Immunology, and
| | | | | | | | - Ole Klaener
- Department of Pathology, Department of Nephrology and Immunology, and
| | | | - Maja T Lindenmeyer
- Division of Nephrology and Institute of Physiology, University of Zürich, Zürich, Switzerland
| | - Clemens D Cohen
- Division of Nephrology and Institute of Physiology, University of Zürich, Zürich, Switzerland
| | - Richard Bucala
- Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
| | - Andre P Tittel
- Institute of Molecular Medicine and Experimental Immunology, University of Bonn, Bonn, Germany; and
| | - Christian Kurts
- Institute of Molecular Medicine and Experimental Immunology, University of Bonn, Bonn, Germany; and
| | | | | | | | - Jürgen Bernhagen
- Institute of Biochemistry and Molecular Cell Biology, RWTH Aachen University, Aachen, Germany;
| | - Peter Boor
- Department of Pathology, Department of Nephrology and Immunology, and Institute of Molecular Biomedicine, Comenius University, Bratislava, Slovakia
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Hanssen L, Alidousty C, Djudjaj S, Frye BC, Rauen T, Boor P, Mertens PR, van Roeyen CR, Tacke F, Heymann F, Tittel AP, Koch A, Floege J, Ostendorf T, Raffetseder U. YB-1 is an early and central mediator of bacterial and sterile inflammation in vivo. J Immunol 2013; 191:2604-13. [PMID: 23872051 DOI: 10.4049/jimmunol.1300416] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In vitro studies identified Y-box-binding protein (YB)-1 as a key regulator of inflammatory mediators. In this study, we observed increased levels of secreted YB-1 in sera from sepsis patients. This led us to investigate the in vivo role of YB-1 in murine models of acute peritonitis following LPS injection, in sterile renal inflammation following unilateral ureteral obstruction, and in experimental pyelonephritis. LPS injection enhanced de novo secretion of YB-1 into the urine and the peritoneal fluid of LPS-treated mice. Furthermore, we could demonstrate a significant, transient upregulation and posttranslational modification (phosphorylation at serine 102) of YB-1 in renal and inflammatory cells. Increased renal cytoplasmic YB-1 amounts conferred enhanced expression of proinflammatory chemokines CCL2 and CCL5. Along these lines, heterozygous YB-1 knockout mice (YB-1(+/d)) that display 50% reduced YB-1 levels developed significantly lower responses to both LPS and sterile inflammation induced by unilateral ureteral obstruction. This included diminished immune cell numbers due to impaired migration propensities and reduced chemokine expression. YB-1(+/d) mice were protected from LPS-associated mortality (20% mortality on day 3 versus 80% in wild-type controls); however, immunosuppression in YB-1(+/d) animals resulted in 50% mortality. In conclusion, our findings identify YB-1 as a major, nonredundant mediator in both systemic and local inflammatory responses.
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Affiliation(s)
- Lydia Hanssen
- Division of Nephrology and Clinical Immunology, University Hospital Rheinisch-Westfaelische Technische Hochschule-Aachen, 52057 Aachen, Germany
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Turner JE, Krebs C, Tittel AP, Paust HJ, Meyer-Schwesinger C, Bennstein SB, Steinmetz OM, Prinz I, Magnus T, Korn T, Stahl RAK, Kurts C, Panzer U. IL-17A production by renal γδ T cells promotes kidney injury in crescentic GN. J Am Soc Nephrol 2012; 23:1486-95. [PMID: 22797181 DOI: 10.1681/asn.2012010040] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The Th17 immune response appears to contribute to the pathogenesis of human and experimental crescentic GN, but the cell types that produce IL-17A in the kidney, the mechanisms involved in its induction, and the IL-17A-mediated effector functions that promote renal tissue injury are incompletely understood. Here, using a murine model of crescentic GN, we found that CD4(+) T cells, γδ T cells, and a population of CD3(+)CD4(-)CD8(-)γδT cell receptor(-)NK1.1(-) T cells all produce IL-17A in the kidney. A time course analysis identified γδ T cells as a major source of IL-17A in the early phase of disease, before the first CD4(+) Th17 cells arrived. The production of IL-17A by renal γδ T cells depended on IL-23p19 signaling and retinoic acid-related orphan receptor-γt but not on IL-1β or IL-6. In addition, depletion of dendritic cells, which produce IL-23 in the kidney, reduced IL-17A production by renal γδ T cells. Furthermore, the lack of IL-17A production in γδ T cells, as well as the absence of all γδ T cells, reduced neutrophil recruitment into the kidney and ameliorated renal injury. Taken together, these data suggest that γδ T cells produce IL-17A in the kidney, induced by IL-23, promoting neutrophil recruitment, and contributing to the immunopathogenesis of crescentic GN.
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Affiliation(s)
- Jan-Eric Turner
- Universitätsklinikum Hamburg-Eppendorf, III Medizinische Klinik, Martinistrasse 52, 20246 Hamburg, Germany
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