Cited by 98Cell Adhesion Molecules ResearchNeutrophil, Myeloperoxidase and Oxidative MechanismsChemokine receptors and signaling

The Neutrophil Btk Signalosome Regulates Integrin Activation during Sterile Inflammation

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Volmering, Stephanie, Block, Helena, Boras, Mark, Lowell, Clifford A., Zarbock, Alexander·2016·Immunity

Abstract

Neutrophils are recruited from the blood to sites of sterile inflammation, where they are involved in wound healing but can also cause tissue damage. During sterile inflammation, necrotic cells release pro-inflammatory molecules including formylated peptides. However, the signaling pathway triggered by formylated peptides to integrin activation and leukocyte recruitment is unknown. By using spinning-disk confocal intravital microscopy, we examined the molecular mechanisms of leukocyte recruitment to sites of focal hepatic necrosis in vivo. We demonstrated that the Bruton's tyrosine kinase (Btk) was required for multiple Mac-1 activation events involved in neutrophil recruitment and functions during sterile inflammation triggered by fMLF. The Src family kinase Hck, Wiskott-Aldrich-syndrome protein, and phospholipase Cγ2 were also involved in this pathway required for fMLF-triggered Mac-1 activation and neutrophil recruitment. Thus, we have identified a neutrophil Btk signalosome that is involved in a signaling pathway triggered by formylated peptides leading to the selective activation of Mac-1 and neutrophil recruitment during sterile inflammation.

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Authors
Volmering, S., Block, H., Boras, M., Lowell, C. A., & Zarbock, A.
Affiliations
  • University of Münster (DE)
  • University of California, San Francisco (US)
Corresponding author
Zarbock, Alexander
Venue
Immunity
Publisher
Elsevier BV
Published
2016-01
Volume
44
Issue
1
Pages
73-87
ISSN
1074-7613 (ISSN-L)
OpenAlex
W2227048301
Cited by
98
References
36
Citations by year
2026: 7 · 2025: 3 · 2024: 10 · 2023: 12 · 2022: 10 · 2021: 14 · 2020: 13 · 2019: 8 · 2018: 6 · 2017: 9 · 2016: 6
FWCI
9.13
Type
journal article
Language
en
Open access
Locations
  • Immunity (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • Deutsche Forschungsgemeinschaft (SFB 1009/A5, EXC-1003, EXC 1003 CIM)
  • National Institute of Allergy and Infectious Diseases (R01AI113272, R01AI068150, R01AI065495)
Topics
  • Health Sciences › Medicine › Immunology and Allergy › Cell Adhesion Molecules Research
  • Life Sciences › Immunology and Microbiology › Immunology › Neutrophil, Myeloperoxidase and Oxidative Mechanisms
  • Health Sciences › Medicine › Oncology › Chemokine receptors and signaling
Keywords
neutrophils, Bruton's tyrosine kinase, signalosome, integrin activation, Mac-1, sterile inflammation, leukocyte recruitment, fMLP, liver necrosis, Hck, Wiskott-Aldrich syndrome protein, PLCγ2, Src family kinases, intravital microscopy
MeSH terms
Agammaglobulinaemia Tyrosine Kinase, Animals, Flow Cytometry, Inflammation, Liver Diseases, N-Formylmethionine Leucyl-Phenylalanine, Necrosis, Protein-Tyrosine Kinases, Signal Transduction, Integrins, Microscopy, Confocal, Neutrophil Infiltration, Mice

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