miR-369-3p modulates inducible nitric oxide synthase and is involved in regulation of chronic inflammatory response

Sci Rep. 2020 Sep 29;10(1):15942. doi: 10.1038/s41598-020-72991-8.

Abstract

Dendritic cells are the most important antigen-presenting cells that link the innate and acquired immune system. In our previous study, we identified that the upregulation of miR-369-3p suppresses the LPS-induced inflammatory response, reducing C/EBP-β, TNFα and IL-6 production. With the aim of gaining further insight into the biological function of miR-369-3p during acute inflammatory response, in the present study we identified novel gene targets of miR-369-3p and demonstrated the suppressive ability of these genes on the inflammatory dendritic cells. Bioinformatic analyses revealed that iNOS is a potential target of miR-369-3p. We demonstrated that the ectopic induction of miR-369-3p markedly reduced iNOS mRNA and protein as well as NO production. Moreover, we found that the upregulation of miR-369-3p decreased the release of TNFα, IL-6, IL-12, IL-1α, IL-1β in response to LPS, and increased the production of anti-inflammatory cytokines such as IL-10 and IL-1RA. In addition, LPS-induced nuclear translocation of NF-kB was inhibited by miR-369-3p. Levels of miR-369-3p were decreased in human inflamed regions of human intestine obtained from IBD patients. Our results provide novel additional information on miR-369-3p as a potential core of the signaling regulating the inflammatory response. These findings suggest that miR-369-3p should be considered as a potential target for the future development of new molecular therapeutic approaches.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • CCAAT-Enhancer-Binding Protein-beta / metabolism
  • Cytokines / metabolism
  • Dendritic Cells / metabolism
  • Dendritic Cells / physiology
  • Inflammation / genetics*
  • Inflammation / metabolism
  • Interleukin-12 / metabolism
  • Interleukin-6 / metabolism
  • Lipopolysaccharides / pharmacology
  • Male
  • Mice
  • Mice, Inbred C57BL
  • MicroRNAs / genetics*
  • MicroRNAs / metabolism
  • NF-kappa B / metabolism
  • Nitric Oxide / metabolism
  • Nitric Oxide Synthase Type II / genetics
  • Nitric Oxide Synthase Type II / metabolism*
  • Signal Transduction / drug effects
  • Tumor Necrosis Factor-alpha / metabolism

Substances

  • CCAAT-Enhancer-Binding Protein-beta
  • Cytokines
  • Interleukin-6
  • Lipopolysaccharides
  • MIRN369 microRNA, mouse
  • MicroRNAs
  • NF-kappa B
  • Tumor Necrosis Factor-alpha
  • Interleukin-12
  • Nitric Oxide
  • Nitric Oxide Synthase Type II