Cited by 58Transplantation: Methods and OutcomesNeutrophil, Myeloperoxidase and Oxidative MechanismsT-cell and B-cell Immunology

Neutrophil extracellular trap fragments stimulate innate immune responses that prevent lung transplant tolerance

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Scozzi, Davide, Wang, Xingan, Liao, Fuyi, Liu, Zhiyi, Zhu, Jihong, Pugh, Katy, Ibrahim, Mohsen, Hsiao, Hsi-Min +6 more·2019·American Journal of Transplantation

Abstract

Neutrophil extracellular traps (NETs) have been shown to worsen acute pulmonary injury including after lung transplantation. The breakdown of NETs by DNAse-1 can help restore lung function, but whether there is an impact on allograft tolerance remains less clear. Using intravital 2-photon microscopy, we analyzed the effects of DNAse-1 on NETs in mouse orthotopic lung allografts damaged by ischemia-reperfusion injury. Although DNAse-1 treatment rapidly degrades intragraft NETs, the consequential release of NET fragments induces prolonged interactions between infiltrating CD4+ T cells and donor-derived antigen presenting cells. DNAse-1 generated NET fragments also promote human alveolar macrophage inflammatory cytokine production and prime dendritic cells for alloantigen-specific CD4+ T cell proliferation through activating toll-like receptor (TLR) — Myeloid Differentiation Primary Response 88 (MyD88) signaling pathways. Furthermore, and in contrast to allograft recipients with a deficiency in NET generation due to a neutrophil-specific ablation of Protein Arginine Deiminase 4 (PAD4), DNAse-1 administration to wild-type recipients promotes the recognition of allo- and self-antigens and prevents immunosuppression-mediated lung allograft acceptance through a MyD88-dependent pathway. Taken together, these data show that the rapid catalytic release of NET fragments promotes innate immune responses that prevent lung transplant tolerance.

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  1. [38]Sangaletti S Neutrophil extracellular traps mediate transfer of cytoplasmic neutrophil antigens to myeloid dendritic cells toward ANCA induction and associated autoimmunity. Blood 120, 3007 (2012). 22932797

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Authors
Scozzi, D., Wang, X., Liao, F., Liu, Z., Zhu, J., Pugh, K., Ibrahim, M., Hsiao, H.-M., Miller, M. J., Yizhan, G., Mohanakumar, T., Krupnick, A. S., Kreisel, D., & Gelman, A. E.
Affiliations
  • Washington University in St. Louis (US)
  • University of Virginia (US)
  • St. Joseph's Hospital and Medical Center (US)
Corresponding author
Gelman, Andrew E.
Venue
American Journal of Transplantation
Publisher
Elsevier BV
Published
2019-04
Volume
19
Issue
4
Pages
1011-1023
ISSN
1600-6135 (ISSN-L)
OpenAlex
W2899203237
Cited by
58
References
51
Citations by year
2026: 7 · 2025: 5 · 2024: 10 · 2023: 7 · 2022: 12 · 2021: 4 · 2020: 6 · 2019: 7
FWCI
4.42
Type
journal article
Language
en
Open access
Locations
  • American Journal of Transplantation (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • IRIS Research product catalog (Sapienza University of Rome) (submittedVersion, other-oa)
Funders
National Institutes of Health (2RHL094601, P01AI116501‐01, R01HL113436‐01A1, R21AI119506)
Topics
  • Health Sciences › Medicine › Surgery › Transplantation: Methods and Outcomes
  • Life Sciences › Immunology and Microbiology › Immunology › Neutrophil, Myeloperoxidase and Oxidative Mechanisms
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
Keywords
neutrophil extracellular traps, lung transplantation, allograft tolerance, DNase1, PAD4, MyD88 signaling, Toll-like receptors, dendritic cells, CD4+ T cells, alveolar macrophages, ischemia-reperfusion injury, innate immunity, immunosuppression
MeSH terms
Animals, Cells, Cultured, Dendritic Cells, Deoxyribonucleases, Enzyme-Linked Immunosorbent Assay, Humans, Immunity, Innate, Mice, Inbred BALB C, Reperfusion Injury, Lung Transplantation, Macrophages, Alveolar, Inflammation Mediators, Transplantation Tolerance, Mice, Extracellular Traps

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