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NETosis proceeds by cytoskeleton and endomembrane disassembly and PAD4-mediated chromatin decondensation and nuclear envelope rupture.
Thiam, Hawa Racine; Wong, Siu Ling; Qiu, Rong; Kittisopikul, Mark; Vahabikashi, Amir; Goldman, Anne E; Goldman, Robert D; Wagner, Denisa D; Waterman, Clare M.
Afiliación
  • Thiam HR; Cell and Developmental Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892.
  • Wong SL; Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA 02115.
  • Qiu R; Department of Pediatrics, Harvard Medical School, Boston, MA 02115.
  • Kittisopikul M; Department of Cell and Molecular Biology, Northwestern University Feinberg School of Medicine, Chicago IL 60611.
  • Vahabikashi A; Department of Cell and Molecular Biology, Northwestern University Feinberg School of Medicine, Chicago IL 60611.
  • Goldman AE; Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, TX 75390.
  • Goldman RD; Department of Cell and Molecular Biology, Northwestern University Feinberg School of Medicine, Chicago IL 60611.
  • Wagner DD; Department of Cell and Molecular Biology, Northwestern University Feinberg School of Medicine, Chicago IL 60611.
  • Waterman CM; Department of Cell and Molecular Biology, Northwestern University Feinberg School of Medicine, Chicago IL 60611.
Proc Natl Acad Sci U S A ; 117(13): 7326-7337, 2020 03 31.
Article en En | MEDLINE | ID: mdl-32170015
ABSTRACT
Neutrophil extracellular traps (NETs) are web-like DNA structures decorated with histones and cytotoxic proteins that are released by activated neutrophils to trap and neutralize pathogens during the innate immune response, but also form in and exacerbate sterile inflammation. Peptidylarginine deiminase 4 (PAD4) citrullinates histones and is required for NET formation (NETosis) in mouse neutrophils. While the in vivo impact of NETs is accumulating, the cellular events driving NETosis and the role of PAD4 in these events are unclear. We performed high-resolution time-lapse microscopy of mouse and human neutrophils and differentiated HL-60 neutrophil-like cells (dHL-60) labeled with fluorescent markers of organelles and stimulated with bacterial toxins or Candida albicans to induce NETosis. Upon stimulation, cells exhibited rapid disassembly of the actin cytoskeleton, followed by shedding of plasma membrane microvesicles, disassembly and remodeling of the microtubule and vimentin cytoskeletons, ER vesiculation, chromatin decondensation and nuclear rounding, progressive plasma membrane and nuclear envelope (NE) permeabilization, nuclear lamin meshwork and then NE rupture to release DNA into the cytoplasm, and finally plasma membrane rupture and discharge of extracellular DNA. Inhibition of actin disassembly blocked NET release. Mouse and dHL-60 cells bearing genetic alteration of PAD4 showed that chromatin decondensation, lamin meshwork and NE rupture and extracellular DNA release required the enzymatic and nuclear localization activities of PAD4. Thus, NETosis proceeds by a stepwise sequence of cellular events culminating in the PAD4-mediated expulsion of DNA.
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Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Trampas Extracelulares / Arginina Deiminasa Proteína-Tipo 4 / Neutrófilos Límite: Animals / Humans Idioma: En Año: 2020 Tipo del documento: Article

Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Trampas Extracelulares / Arginina Deiminasa Proteína-Tipo 4 / Neutrófilos Límite: Animals / Humans Idioma: En Año: 2020 Tipo del documento: Article