Cited by 289Fatty Acid Research and HealthPhagocytosis and Immune RegulationNeutrophil, Myeloperoxidase and Oxidative Mechanisms

Resolvin E1 promotes phagocytosis-induced neutrophil apoptosis and accelerates resolution of pulmonary inflammation

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El Kebir, Driss, Gjorstrup, Per, Filep, János G.·2012·Proceedings of the National Academy of Sciences

Abstract

Inappropriate neutrophil activation contributes to the pathogenesis of acute lung injury (ALI). Apoptosis is essential for removal of neutrophils from inflamed tissues and timely resolution of inflammation. Resolvin E1 (RvE1) is an endogenous lipid mediator derived from the ω-3 polyunsaturated fatty acid eicosapentaenoic acid that displays proresolving actions. Because the balance of prosurvival and proapoptosis signals determines the fate of neutrophils, we investigated the impact of RvE1 on neutrophil apoptosis and the outcome of neutrophil-mediated pulmonary inflammation in mice. Culture of human neutrophils with RvE1 accelerated apoptosis evoked by phagocytosis of opsonized Escherichia coli or yeast. RvE1 through the leukotriene B 4 receptor BLT1 enhanced NADPH oxidase-derived reactive oxygen species generation and subsequent activation of caspase-8 and caspase-3. RvE1 also attenuated ERK and Akt-mediated apoptosis-suppressing signals from myeloperoxidase, serum amyloid A, and bacterial DNA, shifting the balance of pro- and anti-survival signals toward apoptosis via induction of mitochondrial dysfunction. In mice, RvE1 treatment enhanced the resolution of established neutrophil-mediated pulmonary injury evoked by intratracheal instillation or i.p. administration of live E. coli or intratracheal instillation of carrageenan plus myeloperoxidase via facilitating neutrophil apoptosis and their removal by macrophages. The actions of RvE1 were prevented by the pan-caspase inhibitor zVAD-fmk. These results identify a mechanism, promotion of phagocytosis-induced neutrophil apoptosis and mitigation of potent anti-apoptosis signals, by which RvE1 could enhance resolution of acute lung inflammation.

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Authors
El Kebir, D., Gjorstrup, P., & Filep, J. G.
Affiliations
  • Research Center, Maisonneuve-Rosemont Hospital, and Department of Pathology and Cell Biology, University of Montréal, Montréal, QC, Canada H1T 2M4; and
  • Resolvyx Pharmaceuticals, Cambridge, MA 02142
  • Hôpital Maisonneuve-Rosemont (CA)
Venue
Proceedings of the National Academy of Sciences
Published
2012-08-27
Volume
109
Issue
37
Pages
14983-14988
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2050362957
Cited by
289
References
42
Citations by year
2026: 11 · 2025: 22 · 2024: 18 · 2023: 20 · 2022: 25 · 2021: 23 · 2020: 18 · 2019: 15 · 2018: 26 · 2017: 22 · 2016: 16 · 2015: 22 · 2014: 19 · 2013: 31 · 2012: 1
FWCI
21.81
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Canadian Institutes of Health Research (MOP‐97742)
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Fatty Acid Research and Health
  • Life Sciences › Immunology and Microbiology › Immunology › Phagocytosis and Immune Regulation
  • Life Sciences › Immunology and Microbiology › Immunology › Neutrophil, Myeloperoxidase and Oxidative Mechanisms
Keywords
resolvin E1, neutrophil apoptosis, phagocytosis, inflammation resolution, acute lung injury, reactive oxygen species, caspase-8, caspase-3, myeloperoxidase, serum amyloid A, bacterial DNA, mitochondrial dysfunction, eicosapentaenoic acid
MeSH terms
Amino Acid Chloromethyl Ketones, Analysis of Variance, Animals, Cells, Cultured, Escherichia coli, Humans, Mitochondria, Neutrophils, Phagocytosis, Pneumonia, Yeasts, Eicosapentaenoic Acid, Apoptosis, Reactive Oxygen Species, Receptors, Leukotriene B4, Statistics, Nonparametric, Mice, Caspase 3, Caspase 8

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