The anti-inflammatory agent bindarit acts as a modulator of fatty acid-binding protein 4 in human monocytic cells

Sci Rep. 2019 Oct 22;9(1):15155. doi: 10.1038/s41598-019-51691-y.

Abstract

We investigated the cellular and molecular mechanisms by which bindarit, a small indazolic derivative with prominent anti-inflammatory effects, exerts its immunoregulatory activity in lipopolysaccharide (LPS) stimulated human monocytic cells. We found that bindarit differentially regulates the release of interleukin-8 (IL-8) and monocyte chemoattractant protein-1 (MCP-1), enhancing the release of IL-8 and reducing that of MCP-1. These effects specifically required a functional interaction between bindarit and fatty acid binding protein 4 (FABP4), a lipid chaperone that couples intracellular lipid mediators to their biological targets and signaling pathways. We further demonstrated that bindarit can directly interact with FABP4 by increasing its expression and nuclear localization, thus impacting on peroxisome proliferator-activated receptor γ (PPARγ) and LPS-dependent kinase signaling. Taken together, these findings suggest a potential key-role of FABP4 in the immunomodulatory activity of bindarit, and extend the spectrum of its possible therapeutic applications to FABP4 modulation.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Active Transport, Cell Nucleus / drug effects
  • Anti-Inflammatory Agents / chemistry
  • Anti-Inflammatory Agents / pharmacology*
  • Cell Line
  • Cell Nucleus / drug effects
  • Cell Nucleus / metabolism
  • Chemokine CCL2 / metabolism
  • Fatty Acid-Binding Proteins / chemistry
  • Fatty Acid-Binding Proteins / genetics
  • Fatty Acid-Binding Proteins / metabolism*
  • Humans
  • Immunologic Factors / pharmacology
  • Indazoles / chemistry
  • Indazoles / pharmacology*
  • Interleukin-8 / metabolism
  • Lipopolysaccharides
  • Models, Biological
  • Monocytes / drug effects
  • Monocytes / metabolism*
  • PPAR gamma / metabolism
  • Propionates / chemistry
  • Propionates / pharmacology*
  • Protein Binding / drug effects
  • Up-Regulation / drug effects
  • p38 Mitogen-Activated Protein Kinases / metabolism

Substances

  • Anti-Inflammatory Agents
  • Chemokine CCL2
  • FABP4 protein, human
  • Fatty Acid-Binding Proteins
  • Immunologic Factors
  • Indazoles
  • Interleukin-8
  • Lipopolysaccharides
  • PPAR gamma
  • Propionates
  • p38 Mitogen-Activated Protein Kinases
  • bindarit