Cited by 1,495Neutrophil, Myeloperoxidase and Oxidative MechanismsAntimicrobial Peptides and ActivitiesBlood disorders and treatments

PAD4 is essential for antibacterial innate immunity mediated by neutrophil extracellular traps

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Li, Pingxin, Li, Ming, Lindberg, Michael R., Kennett, Mary J., Xiong, Na, Wang, Yanming·2010·Journal of Experimental Medicine

Abstract

Neutrophils trap and kill bacteria by forming highly decondensed chromatin structures, termed neutrophil extracellular traps (NETs). We previously reported that histone hypercitrullination catalyzed by peptidylarginine deiminase 4 (PAD4) correlates with chromatin decondensation during NET formation. However, the role of PAD4 in NET-mediated bacterial trapping and killing has not been tested. Here, we use PAD4 knockout mice to show that PAD4 is essential for NET-mediated antibacterial function. Unlike PAD4+/+ neutrophils, PAD4−/− neutrophils cannot form NETs after stimulation with chemokines or incubation with bacteria, and are deficient in bacterial killing by NETs. In a mouse infectious disease model of necrotizing fasciitis, PAD4−/− mice are more susceptible to bacterial infection than PAD4+/+ mice due to a lack of NET formation. Moreover, we found that citrullination decreased the bacterial killing activity of histones and nucleosomes, which suggests that PAD4 mainly plays a role in chromatin decondensation to form NETs instead of increasing histone-mediated bacterial killing. Our results define a role for histone hypercitrullination in innate immunity during bacterial infection.

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  • PAD4 is the enzyme responsible for histone modifications required for decondensing neutrophil DNA before expulsion.

    “Next, we determined the importance of peptidylarginine deiminase type 4 (PAD4), the enzyme responsible for histone modifications required for decondensing neutrophil DNA before expulsion (25).”

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Authors
Li, P., Li, M., Lindberg, M. R., Kennett, M. J., Xiong, N., & Wang, Y.
Affiliations
Pennsylvania State University (US)
Corresponding author
Wang, Yanming
Venue
Journal of Experimental Medicine
Published
2010-08-23
Volume
207
Issue
9
Pages
1853-1862
ISSN
  • 0022-1007 (ISSN-L)
  • 1540-9538
OpenAlex
W2135849676
Cited by
1,495
References
31
Citations by year
2026: 104 · 2025: 121 · 2024: 122 · 2023: 121 · 2022: 134 · 2021: 123 · 2020: 125 · 2019: 118 · 2018: 94 · 2017: 92 · 2016: 81 · 2015: 68 · 2014: 60 · 2013: 61 · 2012: 51
FWCI
17.98
Type
journal article
Language
en
Open access
Locations
  • The Journal of Experimental Medicine (publishedVersion)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Cancer Institute (R01CA136856)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Neutrophil, Myeloperoxidase and Oxidative Mechanisms
  • Life Sciences › Immunology and Microbiology › Microbiology › Antimicrobial Peptides and Activities
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Blood disorders and treatments
Keywords
PAD4, neutrophil extracellular traps, neutrophils, chromatin decondensation, bacterial killing, necrotizing fasciitis, nucleosome
MeSH terms
Protein-Arginine Deiminase Type 4, Animals, Cell Differentiation, Dysentery, Bacillary, Extracellular Space, Histones, Hydrolases, Immunity, Innate, Neutrophils, Shigella flexneri, Mice, Knockout, Mice

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