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Monocyte chemotactic peptide-1 expression in acute and chronic human nephritides: a pathogenetic role in interstitial monocytes recruitment.

G Grandaliano, L Gesualdo, E Ranieri, R Monno, V Montinaro, F Marra and F P Schena
JASN June 1996, 7 (6) 906-913;
G Grandaliano
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L Gesualdo
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E Ranieri
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R Monno
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V Montinaro
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F Marra
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F P Schena
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Abstract

Tubulointerstitial damage is a common histopathological feature of acute and chronic renal diseases and a prognostic indicator of renal function outcome. Monocytes infiltrating the interstitium, through the release of cytokines and/or growth factors, may play a key role in the pathogenesis of tubulointerstitial damage. Monocyte chemotactic peptide-1 (MCP-1) is a specific and powerful chemoattractant and activating factor for monocytes. This study investigated MCP-1 expression and its correlation with monocyte infiltration and tubulointerstitial damage in biopsies of patients with acute interstitial nephritis (AIN) and a chronic glomerulonephritis, namely immunoglobulin. A nephropathy (IgAN), often characterized by tubulointerstitial involvement. Six patients with AIN and 20 patients with IgAN, nine with mild (G1 to 2) and 11 with moderate to severe histologic lesions (G3 to 5), were studied. MCP-1 gene and protein expression were evaluated by in situ hybridization and immunohistochemistry. Infiltrating CD68-positive cells were identified as monocytes. MCP-1, weakly expressed in normal kidneys, was clearly upregulated in AIN biopsies. The gene and the protein expression were primarily localized in tubular and glomerular parietal epithelial cells, as well as in infiltrating mononuclear cells. In IgAN, a striking increase in MCP-1 mRNA and protein expression was observed only in the biopsies with moderate to severe lesions, with a pattern of expression similar to AIN. The MCP-1 expression strictly correlated with monocyte infiltrates and tubulointerstitial damage. In addition, the urinary excretion of this chemokine was studied in 17 IgAN patients. MCP-1 protein concentration was higher, compared with healthy subjects, in IgAN patients, especially in the G3 to 5 group, and directly correlated with the renal MCP-1 gene expression. In conclusion, these data suggest that production of MCP-1 in the tubulointerstitial compartment may play a key role in modulating monocytes influx and, consequently, tubulointerstitial damage.

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Journal of the American Society of Nephrology
Vol. 7, Issue 6
1 Jun 1996
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Monocyte chemotactic peptide-1 expression in acute and chronic human nephritides: a pathogenetic role in interstitial monocytes recruitment.
G Grandaliano, L Gesualdo, E Ranieri, R Monno, V Montinaro, F Marra, F P Schena
JASN Jun 1996, 7 (6) 906-913;

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Monocyte chemotactic peptide-1 expression in acute and chronic human nephritides: a pathogenetic role in interstitial monocytes recruitment.
G Grandaliano, L Gesualdo, E Ranieri, R Monno, V Montinaro, F Marra, F P Schena
JASN Jun 1996, 7 (6) 906-913;
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