Leukotriene B4 receptors are necessary for the stimulation of NLRP3 inflammasome and IL-1β synthesis in neutrophil-dominant asthmatic airway inflammation

Dong Wook Kwak, Donghwan Park, Jae Hong Kim

Research output: Contribution to journalArticlepeer-review

Abstract

The stimulation of the NOD-, LRR-and pyrin domain-containing protein 3 (NLRP3) inflammasome and IL-1β synthesis are associated with chronic respiratory diseases such as neutrophil-dominant severe asthma. Leukotriene B4 (LTB4) is a principal chemoattractant molecule for neutrophil recruitment, and its receptors BLT1 and BLT2 have been suggested to contribute to neutrophil-dominant asthmatic airway inflammation. However, the relationship between BLT1/2 and NLRP3 in neutrophil-dominant asthmatic airway inflammation has not been previously studied. In the present study, we investigated whether BLT1/2 play any roles in stimulating the NLRP3 inflammasome and IL-1βsynthesis. The blockade of BLT1 or BLT2 clearly suppressed the stimulation of the NLRP3 inflammasome and IL-1β synthesis in house dust mite (HDM)/lipopolysaccharide (LPS)induced neutrophilic airway inflammation. The enzymes 5-lipoxygenase and 12-lipoxygenase, which catalyze the synthesis of BLT1/2 ligands [LTB4, 12(S)-hydroxyeicosatetraenoic acid (12(S)HETE), and 12-hydroxyheptadecatreinoic acid (12-HHT)], were also critically associated with the stimulation of NLRP3 and IL-1β synthesis. Together, our results suggest that the 5-/12-LOX-BLT1/2linked cascade are necessary for the simulation of the NLRP3 inflammasome and IL-1β synthesis, thus contributing to HDM/LPS-induced neutrophil-dominant airway inflammation.

Original languageEnglish
Article number535
JournalBiomedicines
Volume9
Issue number5
DOIs
Publication statusPublished - 2021 May

Keywords

  • Airway inflammation
  • IL-1β
  • Leukotriene B4 receptors
  • NLRP3 inflammasome
  • Neutrophil

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Biochemistry, Genetics and Molecular Biology(all)

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