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タイトル: | Decreased severity of experimental autoimmune arthritis in peptidylarginine deiminase type 4 knockout mice |
著者: | Suzuki, Akari Kochi, Yuta Shoda, Hirofumi Seri, Yu Fujio, Keishi Sawada, Tetsuji Yamada, Ryo https://orcid.org/0000-0002-1587-630X (unconfirmed) Yamamoto, Kazuhiko |
キーワード: | Peptidylarginine deiminase type 4 Rheumatoid arthritis Collagen-induced arthritis mice TNF-α Citrullination |
発行日: | 5-May-2016 |
出版者: | Springer Nature |
誌名: | BMC Musculoskeletal Disorders |
巻: | 17 |
論文番号: | 205 |
抄録: | [Background]Peptidylarginine deiminase type 4 (PADI4) has been identified as a susceptibility gene for rheumatoid arthritis (RA) by genome-wide association studies. PADI4 is highly expressed in the bone marrow, macrophages, neutrophils, and monocytes. Peptidyl citrulline is an interesting molecule in RA because it is a target antigen for anti-citrullinated peptide antibodies, and only PADs (translated proteins from PADI genes) can provide peptidyl citrulline via the modification of protein substrates. The aim of this study was to evaluate the importance of the PADI4 gene in the progression of RA. [Methods]We generated Padi4 knockout (Padi4−/−) DBA1J mice. The Padi4−/− DBA1J and wild-type mice were immunized with bovine type II collagen (CII) to develop collagen-induced arthritis (CIA). The expression of various inflammatory cytokines and Padi genes in immune cells was detected by the real-time TaqMan assay. Cytokine concentrations in sera were measured by enzyme-linked immunosorbent assays. Localization of the PAD4 and PAD2 proteins was indicated by immunohistochemistry. [Results]We demonstrated that the clinical disease score was significantly decreased in the Padi4−/− mice and Padi4 expression was induced by CII immunization. In the Padi4−/−mice, serum anti-type II collagen (CII) immunoglobulin M (IgM), IgG, and inflammatory cytokine levels were significantly decreased compared with those in the wild-type mice. Padi2 expression was induced in the immune cells of the Padi4−/− mice as a compensation for the defect in Padi4. [Conclusions]Padi4 affected disease severity in the CIA mice and was involved in the enhancement of the collagen-initiated inflammatory responses. |
著作権等: | © 2016 Suzuki et al. Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. |
URI: | http://hdl.handle.net/2433/226921 |
DOI(出版社版): | 10.1186/s12891-016-1055-2 |
PubMed ID: | 27150598 |
出現コレクション: | 学術雑誌掲載論文等 |
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