ID | 116191 |
Title Alternative | Cytokines and NLRC4-Dysregulated Diseases
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Author |
Arimochi, Hideki
Tokushima University
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Tsukumo, Shin-Ichi
Tokushima University
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Yasutomo, Koji
Tokushima University
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Keywords | autoinflammation
NLRC4
interleukin-1β
interleukin-18
bone
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Content Type |
Journal Article
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Description | The NLRC4 inflammasome assembles in response to detection of bacterial invasion, and NLRC4 activation leads to the production of IL-1β and IL-18 together with pyroptosis-mediated cell death. Missense activating mutations in NLRC4 cause autoinflammatory disorders whose symptoms are distinctly dependent on the site of mutation and other aspects of the genetic background. To determine the involvement of IL-1β and IL-18 in the inflammation induced by NLRC4 mutation, we depleted IL-1β, IL-18, or both cytokines in Nlrc4-transgenic mice in which mutant Nlrc4 is expressed under the MHC class II promoter (Nlrc4-H443P-Tg mice). The deletion of the Il1b or Il18 gene in Nlrc4-H443P-Tg mice reduced the neutrophil numbers in the spleen, and mice with deletion of both genes had an equivalent number of neutrophils compared to wild-type mice. Deletion of Il1b ameliorated but did not eliminate bone marrow hyperplasia, while mice deficient in Il18 showed no bone marrow hyperplasia. In contrast, tail bone deformity remained in the presence of Il18 deficiency, but Il1b deficiency completely abolished bone deformity. The decreased bone density in Nlrc4-H443P-Tg mice was counteracted by Il1b but not Il18 deficiency. Our results demonstrate the distinct effects of IL-1β and IL-18 on NLRC4-induced inflammation among tissues, which suggests that blockers for each cytokine should be utilized depending on the site of inflammation.
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Journal Title |
Frontiers in Immunology
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ISSN | 16643224
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Publisher | Frontiers Media S.A.
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Volume | 11
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Start Page | 591713
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Published Date | 2020-10-14
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Rights | This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY)(https://creativecommons.org/licenses/by/4.0/). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
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language |
eng
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departments |
Medical Sciences
Institute of Post-LED Photonics
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