Spironolactone prevents diabetic nephropathy through an anti-inflammatory mechanism in type 2 diabetic rats

Sang Youb Han, Cy Hyun Kim, Han Seong Kim, Yi Hwa Jee, Hye Kyoung Song, Mi Hwa Lee, Kum Hyun Han, Hyoung Kyu Kim, Young Sun Kang, Jee Young Han, Young Sik Kim, Dae Ryong Cha

    Research output: Contribution to journalArticlepeer-review

    152 Citations (Scopus)

    Abstract

    Aldosterone induces myocardial fibrosis and vascular inflammation via proinflammatory and profibrotic cytokines. The effect of spironolactone on renal inflammation and renal function was investigated in type 2 diabetic rats. For define the molecular mechanism of spironolactone, the effect of spironolactone on the synthesis of monocyte chemotactic peptide-1 (MCP-1) and its upstream transcription factor, NF-κB, was evaluated in cultured mesangial cells and proximal tubular cells. There were no changes in blood glucose concentration or BP after spironolactone treatment. Spironolactone treatment significantly reduced urinary albumin excretion and ameliorated glomerulosclerosis. Urinary levels of MCP-1 were significantly increased concurrently with renal expression of MCP-1, macrophage migration inhibitory factor, and macrophage infiltration. Spironolactone treatment significantly inhibited urinary excretion of MCP-1 as well as renal MCP-1 and migration inhibitory factor expression and macrophage infiltration. In addition, aldosterone induced upregulation of MCP-1 expression and NF-κB transcriptional activity in cultured cells, and spironolactone reduced both NF-κB activation and MCP-1 synthesis. Furthermore, NF-κB inhibition abolished aldosterone-induced MCP-1 production. Overall, these findings suggest that aldosterone-induced NF-κB activation leads to activation of proinflammatory cytokines, ultimately leading to renal injury in this model. These data suggest that mineralocorticoid blockade may be a potential therapeutic target in diabetic nephropathy.

    Original languageEnglish
    Pages (from-to)1362-1372
    Number of pages11
    JournalJournal of the American Society of Nephrology
    Volume17
    Issue number5
    DOIs
    Publication statusPublished - 2006 May

    ASJC Scopus subject areas

    • Nephrology

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