Cutting Edge: Protein Arginine Deiminase 2 and 4 Regulate NLRP3 Inflammasome-Dependent IL-1β Maturation and ASC Speck Formation in Macrophages
Protein arginine deiminase (PAD) enzymes catalyze the conversion of protein-bound arginine into citrulline, an irreversible posttranslational modification with loss of a positive charge that can influence protein-protein interactions and protein structure. Protein arginine deiminase activity depends...
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| Hauptverfasser: | , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
10 July 2019
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| In: |
The journal of immunology
Year: 2019, Jahrgang: 203, Heft: 4, Pages: 795-800 |
| ISSN: | 1550-6606 |
| DOI: | 10.4049/jimmunol.1800720 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.4049/jimmunol.1800720 Verlag, Volltext: https://www.jimmunol.org/content/203/4/795 
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| Verfasserangaben: | Neha Mishra, Lidja Schwerdtner, Kelly Sams, Santanu Mondal, Fareed Ahmad, Reinhold E. Schmidt, Scott A. Coonrod, Paul R. Thompson, Markus M. Lerch, Lukas Bossaller |
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| 245 | 1 | 0 | |a Cutting Edge |b Protein Arginine Deiminase 2 and 4 Regulate NLRP3 Inflammasome-Dependent IL-1β Maturation and ASC Speck Formation in Macrophages |c Neha Mishra, Lidja Schwerdtner, Kelly Sams, Santanu Mondal, Fareed Ahmad, Reinhold E. Schmidt, Scott A. Coonrod, Paul R. Thompson, Markus M. Lerch, Lukas Bossaller |
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| 520 | |a Protein arginine deiminase (PAD) enzymes catalyze the conversion of protein-bound arginine into citrulline, an irreversible posttranslational modification with loss of a positive charge that can influence protein-protein interactions and protein structure. Protein arginine deiminase activity depends on high intracellular calcium concentrations occurring in dying cells. In this study, we demonstrate that protein citrullination is common during pyroptotic cell death in macrophages and that inhibition of PAD enzyme activity by Cl-amidine, a pan-PAD inhibitor, blocks NLRP3 inflammasome assembly and proinflammatory IL-1β release in macrophages. Genetic deficiency of either PAD2 or PAD4 alone in murine macrophages does not impair IL-1β release; however, pharmacological inhibition or small interfering RNA knockdown of PAD2 within PAD4−/− macrophages does. Our results suggest that PAD2 and 4 activity in macrophages is required for optimal inflammasome assembly and IL-1β release, a finding of importance for autoimmune diseases and inflammation. | ||
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