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Träfflista för sökning "WFRF:(Kobayashi Koichi S.) "

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  • 2019
  • Journal article (peer-reviewed)
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4.
  • Berglund, Martin, et al. (author)
  • IL-1 receptor-associated kinase M downregulates DSS-induced colitis
  • 2010
  • In: Inflammatory Bowel Diseases. - : Oxford University Press (OUP). - 1078-0998 .- 1536-4844. ; 16:10, s. 1778-1786
  • Journal article (peer-reviewed)abstract
    • Background: Ulcerative colitis is associated with increased colon permeability resulting in bacterial translocation into the lamina propria. We investigate the importance of the Toll-like receptor (TLR) regulating protein IL-1 receptor-associated kinase M (IRAK-M) using the erosive dextran sulfate sodium (DSS)-induced model of colitis. Methods: IRAK-M-competent and -incompetent mice were treated with 3% DSS for 5 days followed by 2 days of regular drinking water. Clinical signs of disease were followed for 7 days. At day 7 the mice were sacrificed and plasma and tissue were collected for histopathological examination and analyses of the production of cytokines and chemokines as well as expression of T-cell transcription factors. Results: At day 7 IRAK-M-deficient mice display a reduced total body weight (77.1 +/- 2.1 versus 88.5 +/- 2.0, *P=0.002) and an increased macroscopical (2.7 +/- 0.2 versus 1.6 +/- 0.1, *P 0.002) and histopathological (6.0 +/- 0 versus 3.3 +/- 60.5, *P < 0.001) colon score compared to wildtype mice. Furthermore, IRAK-M-deficient mice have increased colon mRNA expression of proinflammatory cytokines and increased tumor necrosis factor concentrations (41.1 +/- 13.5 versus 12.8 +/- 2.0 pg/mL, *P = 0.010) in plasma. Conclusions: This is the first report examining the role of IRAK-M in colitis. We find that IRAK-M is of critical importance in downregulating induction and progression of DSS colitis, and thereby suggesting that IRAK-M might be a target for future interventional therapies. (Inflamm Bowel Dis 2010; 16: 1778-1786)
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5.
  • Biswas, Amlan, et al. (author)
  • Negative regulation of Toll-like receptor signaling plays an essential role in homeostasis of the intestine.
  • 2011
  • In: European journal of immunology. - : Wiley. - 1521-4141 .- 0014-2980. ; 41:1, s. 182-94
  • Journal article (peer-reviewed)abstract
    • A healthy intestinal tract is characterized by controlled homeostasis due to the balanced interaction between commensal bacteria and the host mucosal immune system. Human and animal model studies have supported the hypothesis that breakdown of this homeostasis may underlie the pathogenesis of inflammatory bowel diseases. However, it is not well understood how intestinal microflora stimulate the intestinal mucosal immune system and how such activation is regulated. Using a spontaneous, commensal bacteria-dependent colitis model in IL-10-deficient mice, we investigated the role of TLR and their negative regulation in intestinal homeostasis. In addition to IL-10(-/-) MyD88(-/-) mice, IL-10(-/-) TLR4(-/-) mice exhibited reduced colitis compared to IL-10(-/-) mice, indicating that TLR4 signaling plays an important role in inducing colitis. Interestingly, the expression of IRAK-M, a negative regulator of TLR signaling, is dependent on intestinal commensal flora, as IRAK-M expression was reduced in mice re-derived into a germ-free environment, and introduction of commensal bacteria into germ-free mice induced IRAK-M expression. IL-10(-/-) IRAK-M(-/-) mice exhibited exacerbated colitis with increased inflammatory cytokine gene expression. Therefore, this study indicates that intestinal microflora stimulate the colitogenic immune system through TLR and negative regulation of TLR signaling is essential in maintaining intestinal homeostasis.
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  • Result 1-5 of 5
Type of publication
journal article (5)
Type of content
peer-reviewed (5)
Author/Editor
Flavell, Richard A (2)
Zhang, Yan (1)
Korhonen, Laura (1)
Lindholm, Dan (1)
Kelly, Daniel (1)
Vertessy, Beata G. (1)
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Bengtsson-Palme, Joh ... (1)
Nilsson, Henrik (1)
Kelly, Ryan (1)
Li, Ying (1)
Moore, Matthew D. (1)
Wang, Mei (1)
Wang, Xin (1)
Liu, Yang (1)
Kumar, Rakesh (1)
Wang, Dong (1)
Liu, Fang (1)
Li, Ke (1)
Liu, Ke (1)
Zhang, Yang (1)
Zhang, Yao (1)
Jin, Yi (1)
Raza, Ali (1)
Rafiq, Muhammad (1)
Zhang, Kai (1)
Khatlani, T (1)
Nàgy, Péter (1)
Kahan, Thomas (1)
Kominami, Eiki (1)
van der Goot, F. Gis ... (1)
Sörelius, Karl, 1981 ... (1)
Bonaldo, Paolo (1)
Thum, Thomas (1)
Batra, Jyotsna (1)
Roobol, Monique J (1)
Adams, Christopher M (1)
Minucci, Saverio (1)
Vellenga, Edo (1)
Backman, Lars (1)
Yan, Hong (1)
Swärd, Karl (1)
Nilsson, Per (1)
Schmidt, Axel (1)
Lorkowski, Stefan (1)
Thrift, Amanda G. (1)
De Milito, Angelo (1)
Zhang, Wei (1)
Zhang, Jian (1)
Hammerschmidt, Sven (1)
Patil, Chandrashekha ... (1)
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University
University of Gothenburg (3)
Stockholm University (2)
Lund University (2)
Karolinska Institutet (2)
Umeå University (1)
Uppsala University (1)
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Halmstad University (1)
Örebro University (1)
Linköping University (1)
Chalmers University of Technology (1)
Swedish University of Agricultural Sciences (1)
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Language
English (5)
Research subject (UKÄ/SCB)
Medical and Health Sciences (3)
Natural sciences (2)

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