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  • Title: Discordant renal histopathologic findings and complement profiles in membranoproliferative glomerulonephritis type III.
    Author: Meyers KE, Strife CF, Witzleben C, Kaplan BS.
    Journal: Am J Kidney Dis; 1996 Dec; 28(6):804-10. PubMed ID: 8957031.
    Abstract:
    Patients with membranoproliferative glomerulonephritis (MPGN) type III and a low serum C3 concentration tend to have evidence for a nephritic factor of the terminal complement pathway (Nft). Complement profiles were studied in three patients with MPGN type III and low serum C3 concentrations. Serum C3 concentrations were 52, 21, and 14 mg/dL (normal range, 83 to 177 mg/dL). Serum Clq, C2, C4, properdin, and C5 concentrations were normal in all patients, whereas two had a slight decrease of C7 or C8. This pattern of complement activation resembles that seen with MPGN type II in which a nephritic factor activates the amplification loop (NFa). We conclude that in patients with MPGN type III the previously reported profile/presence of Nft is not always found, at least in the chronic stage of the disease, despite a low C3 value.
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