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  • Title: Decrease in cell proliferation by an matrix metalloproteinase inhibitor, doxycycline, in a model of immune-complex nephritis.
    Author: Saglam F, Celik A, Tayfur D, Cavdar Z, Yilmaz O, Sarioglu S, Kolatan E, Oktay G, Camsari T.
    Journal: Nephrology (Carlton); 2010 Aug; 15(5):560-7. PubMed ID: 20649877.
    Abstract:
    AIM: Renal expression of matrix metalloproteinases (MMP) and tissue inhibitors of MMP (TIMP) contribute to the development of tubulointerstitial fibrosis characteristic of progressive forms of primary glomerulonephritis (GN). The aim of this study was to investigate the therapeutic effect of MMP inhibitor, doxycycline, administration in an experimental rat model of immune-complex nephritis (ICN). METHODS: The induction of immune-complex glomerulonephritis was carried out by the administration of an i.v. dose of 2 mg bovine serum albumin (BSA) daily for 28 days after 8 weeks of s.c. immunization with 1 mg of BSA in complete Freund's adjuvant. Doxycycline (30 mg/kg) was given daily (in groups 2 and 4) by gavage for 28 days. RESULTS: Animals treated with doxycycline showed significant reduction in glomerular area and cell proliferation than non-treated controls. Glomerular deposition of immunoglobulin (Ig)G and C3 was less intense in treated rats than non-treated controls. Although not statistically significant, interstitial inflammation was less intense in treated rats than non-treated controls. Glomerular expression of MMP-9 by immunoflourescence was significantly inhibited in the treated group. In addition pro-MMP-2 on gelatin zymography was importantly suppressed by doxycycline in ICN. CONCLUSION: Doxycycline, in addition to its antibiotic property, may, following further investigation, provide a possible survival benefit in proliferative glomerulonephritis.
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