title: Dependence of Glomerulonephritis Induction on Novel Intraglomerular Alternatively Activated Bone Marrow-Derived Macrophages and Mac-1 and PD-L1 in Lupus-Prone NZM2328 Mice.
abstract: Glomerular damage mediated by glomerulus-infiltrating myeloid-derived cells is a key pathogenic event in lupus nephritis (LN), but the process is poorly understood. Confocal microscopy of kidney sections and flow cytometry analysis of glomerular cells from magnetic bead-purified glomeruli have identified glomerulus-infiltrating leukocyte populations in NZM2328 (NZM) lupus-prone mice with spontaneous chronic glomerulonephritis (GN) and anti-glomerular basement membrane-induced nephritis. The occurrence of a major glomerulus-infiltrating CD11b+F4/80-I-A-macrophage population exhibiting the markers programmed death ligand-1 (PD-L1), Mac-2, and macrophage mannose receptor (CD206) and producingKlf4,Il10,Retnla,Tnf, andIl6mRNA, which are known to be expressed by alternatively activated (M2b) macrophages, correlated with proteinuria status. In NZM mice with spontaneous LN, glomerular macrophage infiltration is predominant. CD11b+F4/80-I-A-intraglomerular macrophages and polymorphonuclear neutrophils (PMN) are important in inducing GN, as anti-CD11b and -ICAM-1 mAb inhibited both proteinuria and macrophage and PMN infiltration. The predominant and high expression of PD-L1 by CD11b+F4/80-I-A-glomerular macrophages in kidneys of mice with GN and the inhibition of proteinuria by anti-PD-L1 mAb supported the pathogenic role of these macrophages but not the PD-L1-PMN in GN development and in inducing podocyte damage. In NZM mice with spontaneous chronic GN and severe proteinuria, few glomerulus-infiltrating PMN were found, leaving macrophages and, to a less extent, dendritic cells as the major infiltrating leukocytes. Taken together, these data support the important pathogenic effect of CD11b+F4/80-I-A-M2b-like glomerulus-infiltrating macrophages in LN and reinforce macrophages as a promising target for GN treatment.
authors.affiliation: Department of Medicine, University of Virginia Health Sciences Center, Charlottesville, VA 22908; sjs5c@Virginia.edu.|Center for Immunity, Inflammation, and Regenerative Medicine, University of Virginia School of Medicine, Charlottesville, VA 22908.
authors.forename: Sun-Sang J
authors.identifier: 0000-0001-5432-691X
authors.initials: SJ
authors.lastname: Sung
authors.affiliation: Department of Medicine, University of Virginia Health Sciences Center, Charlottesville, VA 22908.|Center for Immunity, Inflammation, and Regenerative Medicine, University of Virginia School of Medicine, Charlottesville, VA 22908.|Department of Microbiology, Immunology, and Cancer Biology, University of Virginia School of Medicine, Charlottesville, VA 22908; and.
authors.forename: Yan
authors.initials: Y
authors.lastname: Ge
authors.affiliation: Department of Medicine, University of Virginia Health Sciences Center, Charlottesville, VA 22908.|Center for Immunity, Inflammation, and Regenerative Medicine, University of Virginia School of Medicine, Charlottesville, VA 22908.
authors.forename: Chao
authors.initials: C
authors.lastname: Dai
authors.affiliation: Department of Medicine, University of Virginia Health Sciences Center, Charlottesville, VA 22908.|Center for Immunity, Inflammation, and Regenerative Medicine, University of Virginia School of Medicine, Charlottesville, VA 22908.
authors.forename: Hongyang
authors.initials: H
authors.lastname: Wang
authors.affiliation: Department of Medicine, University of Virginia Health Sciences Center, Charlottesville, VA 22908.|Center for Immunity, Inflammation, and Regenerative Medicine, University of Virginia School of Medicine, Charlottesville, VA 22908.|Department of Microbiology, Immunology, and Cancer Biology, University of Virginia School of Medicine, Charlottesville, VA 22908; and.
authors.forename: Shu Man
authors.identifier: 0000-0001-5158-3494
authors.initials: SM
authors.lastname: Fu
authors.affiliation: Department of Medicine, University of Virginia Health Sciences Center, Charlottesville, VA 22908.|Center for Immunity, Inflammation, and Regenerative Medicine, University of Virginia School of Medicine, Charlottesville, VA 22908.
authors.forename: Rahul
authors.identifier: 0000-0002-3115-3523
authors.initials: R
authors.lastname: Sharma
authors.affiliation: Department of Microbiology, Immunology, and Cancer Biology, University of Virginia School of Medicine, Charlottesville, VA 22908; and.
authors.forename: Young S
authors.identifier: 0000-0002-2698-9844
authors.initials: YS
authors.lastname: Hahn
authors.affiliation: Department of Cell Biology, University of Virginia Health Sciences Center, Charlottesville, VA 22908.
authors.forename: Jing
authors.initials: J
authors.lastname: Yu
authors.affiliation: Department of Medicine, University of Virginia Health Sciences Center, Charlottesville, VA 22908.|Center for Immunity, Inflammation, and Regenerative Medicine, University of Virginia School of Medicine, Charlottesville, VA 22908.
authors.forename: Thu H
authors.identifier: 0000-0002-1906-064X
authors.initials: TH
authors.lastname: Le
authors.affiliation: Department of Medicine, University of Virginia Health Sciences Center, Charlottesville, VA 22908.|Center for Immunity, Inflammation, and Regenerative Medicine, University of Virginia School of Medicine, Charlottesville, VA 22908.
authors.forename: Mark D
authors.initials: MD
authors.lastname: Okusa
authors.affiliation: Department of Medicine, University of Virginia Health Sciences Center, Charlottesville, VA 22908.|Center for Immunity, Inflammation, and Regenerative Medicine, University of Virginia School of Medicine, Charlottesville, VA 22908.
authors.forename: Warren K
authors.identifier: 0000-0003-0589-6849
authors.initials: WK
authors.lastname: Bolton
authors.affiliation: Department of Medicine, University of Virginia Health Sciences Center, Charlottesville, VA 22908.|Center for Immunity, Inflammation, and Regenerative Medicine, University of Virginia School of Medicine, Charlottesville, VA 22908.
authors.forename: Jessica R
authors.identifier: 0000-0002-3350-6599
authors.initials: JR
authors.lastname: Lawler
mesh_terms: D000818:Animals; D060890:B7-H1 Antigen / Q000276:immunology; D001854:Bone Marrow Cells / Q000276:immunology; D002469:Cell Separation; D004195:Disease Models, Animal; D005260:Female; D005434:Flow Cytometry; D007678:Kidney Glomerulus / Q000276:immunology* / Q000473:pathology; D000090062:Kruppel-Like Factor 4; D008181:Lupus Nephritis / Q000276:immunology* / Q000473:pathology; D016177:Macrophage-1 Antigen / Q000276:immunology; D008264:Macrophages / Q000276:immunology* / Q000473:pathology; D051379:Mice; D008817:Mice, Mutant Strains; D018613:Microscopy, Confocal; D060888:Real-Time Polymerase Chain Reaction
chemical_list: D060890:B7-H1 Antigen; C498919:Cd274 protein, mouse; C000715468:Klf4 protein, mouse; D000090062:Kruppel-Like Factor 4; D016177:Macrophage-1 Antigen