title: Mononuclear cell-infiltrate inhibition by blocking macrophage-derived chemokine results in attenuation of developing crescentic glomerulonephritis.
abstract: Glomerular monocyte/macrophage (Mo/M phi) infiltrates play a role in many forms of glomerulonephritis (GN), and the intensity of Mo/M phi trafficking correlates with the loss of renal function and histological damage. We analyzed the functional role of macrophage-derived chemokine (MDC), a potent mononuclear cell chemoattractant, during the progression of anti-glomerular basement membrane (GBM) antibody (Ab) GN, a model of crescentic GN in the WKY rat, and whether the effects of MDC were dependent on its receptor CCR4. MDC mRNA and protein expression were markedly induced in nephritic glomeruli throughout the disease. Blocking the function of MDC did not affect the developing of the disease from days 2 to 7, but it dramatically blocked M omicron/M phi infiltration in the glomeruli, prevented crescent formation, and reversed renal function impairment during days 7 to 14 of the anti-GBM GN. In this study, we also found that MDC activity on M omicron/M phi in this GN was at least partly dependent on a new variant of CCR4. These results suggest that MDC is critically involved in the development of anti-GBM GN from acute glomerular injury to irreversible tissue damage. In addition, an antagonist to MDC may represent a prime drug target for therapeutic application to intervene in the progression of anti-GBM GN and in other M omicron/M phi-dominant GN.
authors.affiliation: Department of Immunology, The Scripps Research Institute, La Jolla, California, USA.
authors.forename: Gabriela E
authors.initials: GE
authors.lastname: Garcia
authors.forename: Yiyang
authors.initials: Y
authors.lastname: Xia
authors.forename: Jeffrey
authors.initials: J
authors.lastname: Harrison
authors.forename: Curtis B
authors.initials: CB
authors.lastname: Wilson
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Johnson
authors.forename: Kevin B
authors.initials: KB
authors.lastname: Bacon
authors.forename: Lili
authors.initials: L
authors.lastname: Feng
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D054422:Chemokine CCL22; D018925:Chemokines / Q000037:antagonists & inhibitors*; D019742:Chemokines, CC / Q000737:chemistry / Q000235:genetics*; D017931:DNA Primers; D018450:Disease Progression; D015723:Gene Library; D005921:Glomerulonephritis / Q000235:genetics / Q000276:immunology* / Q000517:prevention & control; D006801:Humans; D007678:Kidney Glomerulus / Q000276:immunology; D007963:Leukocytes, Mononuclear / Q000473:pathology*; D008264:Macrophages / Q000276:immunology*; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D012333:RNA, Messenger / Q000235:genetics; D051381:Rats; D011921:Rats, Inbred WKY; D054398:Receptors, CCR4; D019707:Receptors, Chemokine / Q000737:chemistry / Q000235:genetics*; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D013154:Spleen / Q000276:immunology*; D014158:Transcription, Genetic; D014162:Transfection
chemical_list: C515482:CCL22 protein, human; C515354:CCR4 protein, human; C515356:Ccr4 protein, rat; D054422:Chemokine CCL22; D018925:Chemokines; D019742:Chemokines, CC; D017931:DNA Primers; D012333:RNA, Messenger; D054398:Receptors, CCR4; D019707:Receptors, Chemokine