Sesquiterpene lactones inhibit advanced oxidation protein product-induced MCP-1 expression in podocytes via an IKK/NF-κB-dependent mechanism

Oxid Med Cell Longev. 2015:2015:934058. doi: 10.1155/2015/934058. Epub 2015 Jan 12.

Abstract

Inflammation is a relevant factor in the pathogenesis of diabetes nephropathy (DN). Sesquiterpene lactones (SLs), originally isolated from Tanacetum parthenium, have been reported to exhibit anti-inflammatory effects but few studies have examined their effects on DN. To determine whether advanced oxidation protein products (AOPPs) can induce the expression of chemokine monocyte chemoattractant protein- (MCP-) 1 in cultured mouse podocytes and to explore the mechanisms of the potential renoprotection of SLs, we treated podocytes with AOPPs and SLs (parthenolide and its derivatives micheliolide, compound 1, and compound 2). MCP-1 mRNA and protein expression were tested using quantitative real-time PCR and ELISA, respectively, and the protein levels of IKKβ, phospho-IKKβ, IκBα, NF-κB p65, phospho-NF-κB p65, and tubulin were analyzed by Western blotting. AOPPs activated the expression of MCP-1 mRNA and protein in a dose- and time-dependent manner, activated IKKβ and NF-κB p65, and promoted IκBα degradation. The IKK/NF-κB inhibitor parthenolide decreased AOPP-induced MCP-1 expression. Pretreatment with SLs inhibited MCP-1 mRNA and protein expression and suppressed IKKβ and NF-κB p65 phosphorylation and IκBα degradation. Taken together, these findings provide a novel explanation for the anti-inflammatory effects of SLs that will ultimately benefit DN and potentially other inflammatory and immune renal diseases.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Advanced Oxidation Protein Products / toxicity*
  • Animals
  • Cell Line
  • Chemokine CCL2 / genetics
  • Chemokine CCL2 / metabolism*
  • Gene Expression Regulation / drug effects
  • I-kappa B Proteins / metabolism
  • Lactones / pharmacology*
  • Mice
  • NF-KappaB Inhibitor alpha
  • NF-kappa B / metabolism
  • Phosphorylation / drug effects
  • Podocytes / cytology
  • Podocytes / drug effects
  • Podocytes / metabolism
  • RNA, Messenger / metabolism
  • Sesquiterpenes / chemistry
  • Signal Transduction / drug effects*

Substances

  • Advanced Oxidation Protein Products
  • Chemokine CCL2
  • I kappa B beta protein
  • I-kappa B Proteins
  • Lactones
  • NF-kappa B
  • Nfkbia protein, mouse
  • RNA, Messenger
  • Sesquiterpenes
  • NF-KappaB Inhibitor alpha