Inhibition of inflammation by pentosan polysulfate impedes the development and progression of severe diabetic nephropathy in aging C57B6 mice

Jin Wu, Tian Jun Guan, Shirong Zheng, Fabrizio Grosjean, Weicheng Liu, Huabao Xiong, Ronald Gordon, Helen Vlassara, Gary E. Striker, Feng Zheng

Research output: Contribution to journalArticlepeer-review

Abstract

Inflammation has a key role in diabetic nephropathy (DN) progression. Pentosan polysulfate (PPS) has been shown to decreases interstitial inflammation and glomerulosclerosis in 5/6 nephrectomized rats. Since PPS has an excellent long-term safety profile in interstitial cystitis treatment, and we recently found that old diabetic C57B6 mice develop DN characterized by extensive tubulointerstitial inflammatory lesions that mimics human DN, we examined the effect of PPS on old diabetic mice. We also examined the anti-inflammatory properties of PPS in renal cells in vitro. Diabetes was induced with streptozotocin in 18 months female (early aging) C57B6 mice. Mice were then randomized to receive oral PPS (25 mg/kg/day) or water for 4 months. The effect of PPS on NF-κB activation and on TNFα, high glucose or advanced glycation end products (AGEs) stimulated proinflammatory gene expression in renal cells was examined. We found that PPS treatment preserved renal function, significantly reduced albuminuria, and markedly decreased the severity of renal lesions, including tubulointerstitial inflammation. PPS also reduced upregulation of TNFα and proinflammatory genes in aging diabetic kidneys. Furthermore, PPS suppressed NF-B, decreased the proinflammatory actions of TNFα, and decreased high glucose and AGEs stimulated MCP-1 production in vitro. Finally, PPS decreased TNFα-induced increase in albumin permeability in podocyte monolayers. In conclusion, PPS treatment largely prevents the development/progression of nephropathy in aging diabetic mice. As this may be mediated by suppression of TNFα, high glucose, and AGE-stimulated NF-B activation and inflammation in vitro, the in vivo blockade of DN may be due to the anti-inflammatory properties of PPS.

Original languageEnglish
Pages (from-to)1459-1471
Number of pages13
JournalLaboratory Investigation
Volume91
Issue number10
DOIs
Publication statusPublished - Oct 2011

Keywords

  • aging
  • diabetic nephropathy
  • inflammation
  • PPS
  • TNFα

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Cell Biology
  • Molecular Biology

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