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- W1979798935 abstract "Decay-accelerating factor (DAF or CD55) is one of a set of regulators that function to protect self cells from deposition of autologous C3b on their surfaces. Its relative importance in vivo, however, is incompletely understood. As one approach to address this issue, we induced nephrotoxic serum (NTS) nephritis in wild-type mice and Daf1 gene-floxed mice devoid of renal DAF expression. For these experiments NTS IgG was administered at a dose (0.5 mg iv) that requires complement for glomerular injury. After 18 hours, renal injury was assessed by proteinuria and by histologic, immunohistochemical, and electron microscopic analyses of kidneys. Fifteen normal and 15 DAF-deficient mice were studied. Baseline albuminuria in the Daf1−/− mice was 115.9 ± 41.4 μg/mg creatinine as compared with 85.7 ± 32.3 μg/mg creatinine in their Daf1+/+ littermates (p = 0.075). After administration of NTS IgG, albuminuria increased to 2001.7 ± 688.7 μg/mg creatinine as compared with 799.7 ± 340.5 μg/mg creatinine in the controls (p = 0.0003). Glomerular histology was similar in Daf1−/− and Daf1+/+ mice, with essentially no infiltrating leukocytes. In contrast, electron microscopy revealed severe podocyte fusion in the Daf1−/− mice but only mild focal changes in the controls. Immunohistochemical staining showed equivalent deposition of the administered (sheep) NTS IgG in the Daf1−/− and Daf1+/+ animals. This contrasted with marked deposition of autologous murine C3 in the former and minimal deposition in the latter. The results show that DAF is essential physiologically for protecting glomeruli against autologous complement attack initiated by the classical pathway." @default.
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- W1979798935 date "2002-05-01" @default.
- W1979798935 modified "2023-10-07" @default.
- W1979798935 title "Decay-Accelerating Factor Confers Protection Against Complement-Mediated Podocyte Injury in Acute Nephrotoxic Nephritis" @default.
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- W1979798935 doi "https://doi.org/10.1038/labinvest.3780451" @default.
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