Cited by 743Neutrophil, Myeloperoxidase and Oxidative MechanismsRedox biology and oxidative stressAntimicrobial Peptides and Activities

A Myeloperoxidase-Containing Complex Regulates Neutrophil Elastase Release and Actin Dynamics during NETosis

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Metzler, Kathleen D., Goosmann, Christian, Lubojemska, Aleksandra, Zychlinsky, Arturo, Papayannopoulos, Venizelos·2014·Cell Reports

Abstract

Neutrophils contain granules loaded with antimicrobial proteins and are regarded as impermeable organelles that deliver cargo via membrane fusion. However, during the formation of neutrophil extracellular traps (NETs), neutrophil elastase (NE) translocates from the granules to the nucleus via an unknown mechanism that does not involve membrane fusion and requires reactive oxygen species (ROS). Here, we show that the ROS triggers the dissociation of NE from a membrane-associated complex into the cytosol and activates its proteolytic activity in a myeloperoxidase (MPO)-dependent manner. In the cytosol, NE first binds and degrades F-actin to arrest actin dynamics and subsequently translocates to the nucleus. The complex is an example of an oxidative signaling scaffold that enables ROS and antimicrobial proteins to regulate neutrophil responses. Furthermore, granules contain protein machinery that transports and delivers cargo across membranes independently of membrane fusion.

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Authors
Metzler, K. D., Goosmann, C., Lubojemska, A., Zychlinsky, A., & Papayannopoulos, V.
Affiliations
  • Max Planck Institute for Infection Biology (DE)
  • Medical Research Council (GB)
Corresponding author
Papayannopoulos, Venizelos
Venue
Cell Reports
Publisher
Elsevier BV
Published
2014-08
Volume
8
Issue
3
Pages
883-896
ISSN
2211-1247 (ISSN-L)
OpenAlex
W2011145349
Cited by
741
References
40
Citations by year
2026: 64 · 2025: 79 · 2024: 83 · 2023: 92 · 2022: 91 · 2021: 75 · 2020: 61 · 2019: 46 · 2018: 54 · 2017: 34 · 2016: 42 · 2015: 17 · 2014: 3
FWCI
14.63
Type
journal article
Language
en
Open access
Locations
  • Cell Reports (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Max Planck Digital Library (submittedVersion)
Funders
  • Medical Research Council (MC_UP_1202/13)
  • Max-Planck-Gesellschaft
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Neutrophil, Myeloperoxidase and Oxidative Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Life Sciences › Immunology and Microbiology › Microbiology › Antimicrobial Peptides and Activities
Keywords
neutrophil extracellular traps, neutrophil elastase, myeloperoxidase, neutrophil granules, reactive oxygen species, actin dynamics, antimicrobial proteins
MeSH terms
Actins, Cell Membrane, Cell Nucleus, Humans, Peroxidase, Neutrophils, Protein Binding, Reactive Oxygen Species, Leukocyte Elastase, Active Transport, Cell Nucleus, Proteolysis, Extracellular Traps

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