MyD88–BLT2-dependent cascade contributes to LPS-induced interleukin-6 production in mouse macrophage

A. Jin Lee, Kyung Jin Cho, Jae Hong Kim

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

Endotoxic responses to bacterial lipopolysaccharide (LPS) are triggered by Toll-like receptor 4 (TLR4) and involve the production of inflammatory mediators, including interleukin-6 (IL-6), by macrophages. The detailed mechanism of IL-6 production by macrophages in response to LPS has remained unclear, however. We now show that LPS induces IL-6 synthesis in mouse peritoneal macrophages via the leukotriene B4 receptor BLT2. Our results suggest that TLR4–MyD88 signaling functions upstream of BLT2 and that the generation of reactive oxygen species (ROS) by NADPH oxidase 1 (Nox1) and consequent activation of the transcription factor nuclear factor (NF)-κB function downstream of BLT2 in this response. These results suggest that a TLR4–MyD88–BLT2–Nox1–ROS–NF-κB pathway contributes to the synthesis of IL-6 in LPS-stimulated mouse macrophages.

Original languageEnglish
Article numbere156
JournalExperimental and Molecular Medicine
Volume47
Issue number4
DOIs
Publication statusPublished - 2015 Apr

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Medicine
  • Molecular Biology
  • Clinical Biochemistry

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