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      An Analysis of Monocyte/Macrophage Subsets and Granulocyte-Macrophage Colony-Stimulating Factor Expression in Renal Allograft Biopsies


      S. Karger AG

      Renal transplantation, Acute rejection, Macrophage, Granulocyte-macrophage colony-stimulating factor

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          The role of infiltrating macrophages in the pathogenesis of acute rejection was investigated in biopsy specimens obtained from human transplanted kidneys using immunohistochemical methods. Thirty-one allograft tissue specimens obtained from 26 patients were histologically classified into 18 with acute rejection, 7 with borderline change and 6 with chronic rejection according to the Banff working classification (1993). These specimens were analyzed by avidin-biotin peroxidase complex method on frozen sections in order to examine the utility of some antimonocyte/macrophage monoclonal antibodies in differentiating acute rejection from other conditions. The ratio of CD68, CD11b, LeuM3, OKM5 and HAM56-positive infiltrating monocytes/macrophages to leukocyte common antigen (LCA)-positive cells in the renal cortex were calculated. As a result, the ratio of the positive cells for CD68, which stains mature macrophages, significantly increased in the cases of acute rejection compared with those of other groups. In addition, a strong expression of granulocyte-macrophage colony-stimulating factor (GM-CSF) was observed in the acute rejection group. In our study, the expression of class II major histocompatibility antigens (HLA-DR) in the proximal epithelial tubules was also strongly observed in the cases of acute rejection. It was thus concluded that the increase of CD68-positive infiltrating cells and the expression of GM-CSF may play a possible role as a reaction effector in the process of acute renal allograft rejection.

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          Author and article information

          S. Karger AG
          19 December 2008
          : 73
          : 4
          : 536-543
          189137 Nephron 1996;73:536–543
          © 1996 S. Karger AG, Basel

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          Page count
          Pages: 8
          Original Paper


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