Hu, Zhongshuang and Murakami, Taisuke and Tamura, Hiroshi and Reich, Johannes and Kuwahara-Arai, Kyoko and Iba, Toshiaki and Tabe, Yoko and Nagaoka, Isao (2017) Neutrophil extracellular traps induce IL-1 beta production by macrophages in combination with lipopolysaccharide. INTERNATIONAL JOURNAL OF MOLECULAR MEDICINE, 39 (3). pp. 549-558. ISSN 1107-3756, 1791-244X
Full text not available from this repository. (Request a copy)Abstract
Upon exposure to invading microorganisms, neutrophils undergo NETosis, a recently identified type of programmed cell death, and release neutrophil extracellular traps (NETs). NETs are described as an antimicrobial mechanism, based on the fact that NEls can trap microorganisms and exhibit bactericidal activity through the action of NET-associated components. In contrast, the components of NETs have been recognized as damage-associated molecular pattern molecules (DAMPs), which trigger inflammatory signals to induce cell death, inflammation and organ failure. In the present study, to clarify the effect of NETs on cytokine production by macrophages, mouse macrophage-like J774 cells were treated with NETs in combination with lipopolysaccharide (LPS) as a constituent of pathogen-associated molecular patterns. The results revealed that NETs significantly induced the production of interleukin (IL)-1 beta by J774 cells in the presence of LPS. Notably, the NET/LPS-induced IL-1 beta production was inhibited by both caspase-1 and caspase-8 inhibitors. Furthermore, nucleases and serine protease inhibitors but not anti-histone antibodies significantly inhibited the NET/LPS-induced IL-1 beta production. Moreover, we confirmed that caspase-1 and caspase-8 were activated by NETs/LPS, and the combination of LPS, DNA and neutrophil elastase induced IL-1 beta production in reconstitution experiments. These observations indicate that NETs induce the production of IL-1 beta by J774 macrophages in combination with LPS via the caspase-1 and caspase-8 pathways, and NET-associated DNA and serine proteases are involved in NET/LPS-induced IL-1 beta production as essential components.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CELL-DEATH; SERINE PROTEASES; SEPTIC SHOCK; SEPSIS; INFLAMMATION; INTERLEUKIN-1-BETA; ACTIVATION; APOPTOSIS; STIMULATION; MECHANISMS; macrophage; neutrophil extracellular traps; IL-1 beta; lipopolysaccharide; NETosis; damage-associated molecular pattern molecules |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:01 |
| Last Modified: | 27 Feb 2019 09:21 |
| URI: | https://pred.uni-regensburg.de/id/eprint/303 |
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