Contributory Role of BLT2 in the Production of Proinflammatory Cytokines in Cecal Ligation and Puncture-Induced Sepsis

Donghwan Park, Myungja Ro, A. Jin Lee, Dong Wook Kwak, Yunro Chung, Jae Hong Kim

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

BLT2 is a low-affinity receptor for leukotriene B4, a potent lipid mediator of inflammation generated from arachidonic acid via the 5-lipoxygenase pathway. The aim of this study was to investigate whether BLT2 plays any role in sepsis, a systemic inflammatory response syndrome caused by infection. A murine model of cecal ligation and puncture (CLP)-induced sepsis was used to evaluate the role of BLT2 in septic inflammation. In the present study, we observed that the levels of ligands for BLT2 (LTB4 [leukotriene B4] and 12(S)-HETE [12(S)-hydroxyeicosatetraenoic acid]) were significantly increased in the peritoneal lavage fluid and serum from mice with CLP-induced sepsis. We also observed that the levels of BLT2 as well as 5-lipoxygenase (5-LO) and 12-LO, which are synthesizing enzymes for LTB4 and 12(S)-HETE, were significantly increased in lung and liver tissues in the CLP mouse model. Blockade of BLT2 markedly suppressed the production of sepsis-associated cytokines (IL-6 [interleukin-6], TNF-α[[tumor necrosis factor alpha], and IL-1β [interleukin-1β] as well as IL-17 [interleukin-17]) and alleviated lung inflammation in the CLP group. Taken together, our results suggest that BLT2 cascade contributes to lung inflammation in CLP-induced sepsis by mediating the production of inflammatory cytokines. These findings suggest that BLT2 may be a potential therapeutic target for sepsis patients.

Original languageEnglish
Pages (from-to)893-899
Number of pages7
JournalMolecules and cells
Volume44
Issue number12
DOIs
Publication statusPublished - 2021 Dec 1

Bibliographical note

Publisher Copyright:
© The Korean Society for Molecular and Cellular Biology.

Keywords

  • BLT2
  • Cecal ligation and puncture
  • Cytokines
  • Leukotrienes
  • Sepsis

ASJC Scopus subject areas

  • Molecular Biology
  • Cell Biology

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