Nickel particles are present in Crohn's disease tissue and exacerbate intestinal inflammation in IBD susceptible mice

Biochem Biophys Res Commun. 2022 Feb 12:592:74-80. doi: 10.1016/j.bbrc.2021.12.111. Epub 2022 Jan 1.

Abstract

Crohn's disease is an inflammatory disease of the gut caused by a complex interplay among genetic, microbial, and environmental factors. The intestinal tract is constantly exposed to metals and other trace elements ingested as food. Synchrotron radiation-induced X-ray fluorescence spectroscopy and X-ray absorption fine structure analysis revealed the deposition of nickel particles within Crohn's disease tissue specimens. After nickel particle stimulation, THP-1 cells showed filopodia formation and autophagic vacuoles containing lipid bodies. Nickel particles precipitated colitis in mice bearing mutations of the IBD susceptibility protein A20/TNFAIP3. Nickel particles also exacerbated dextran sulfate sodium-induced colitis in mice harboring myeloid cell-specific Atg5 deficiency. These findings illustrate that nickel particle ingestion may worsen Crohn's disease by perturbing autophagic processes in the intestine, providing new insights into environmental factors in Crohn's disease pathogenesis.

Keywords: A20/TNFAIP3; Autophagy; Crohn's disease; Macrophage; Nickel.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Autophagy / drug effects
  • Autophagy-Related Protein 5 / metabolism
  • Crohn Disease / pathology*
  • Dextran Sulfate
  • Disease Progression*
  • Disease Susceptibility
  • Humans
  • Inflammation / pathology*
  • Intestines / pathology*
  • Macrophages / drug effects
  • Macrophages / pathology
  • Macrophages / ultrastructure
  • Mice
  • Mice, Inbred C57BL
  • Nickel / toxicity*
  • THP-1 Cells
  • Tumor Necrosis Factor alpha-Induced Protein 3 / metabolism

Substances

  • Autophagy-Related Protein 5
  • Nickel
  • Dextran Sulfate
  • Tumor Necrosis Factor alpha-Induced Protein 3