Inflammatory responses induced by interleukin-17 family members in human colonic subepithelial myofibroblasts

被引:70
作者
Yagi, Yuhki [1 ]
Andoh, Akira [1 ]
Inatomi, Osamu [1 ]
Tsujikawa, Tomoyuki [1 ]
Fujiyama, Yoshihide [1 ]
机构
[1] Shiga Univ Med Sci, Dept Internal Med, Otsu, Shiga 5202192, Japan
关键词
Th17; cells; MAP kinase; inflammation; IBD;
D O I
10.1007/s00535-007-2091-3
中图分类号
R57 [消化系及腹部疾病];
学科分类号
摘要
Background. We investigated the potential role of interleukin (IL)-17 family members (IL-17A to IL-17F) in the induction of inflammatory responses in human colonic subepithelial myofibroblasts (SEMFs). Methods. The expression of the inflammatory cytokines IL-6, IL-8, leukemia inhibitory factor (LIF), and matrix metalloproteinases (MMP)-1 and MMP-3 were evaluated by enzyme-linked immunosorbent assay and Northern blotting. Activation of mitogen-activated protein kinase (MAPK) was assessed by immunoblotting. Results. IL-17A and IL-17F significantly enhanced IL-6, IL-8, LIF, MMP-1, and MMP-3 secretion. The effects of IL-17A were relatively stronger than those induced by IL-17F. The effects of IL-17B, IL-17C, IL-17D, and IL-17E were modest as compared with those induced by IL-17A and IL-17F. Both IL-17A and IL-17F augmented IL-1 beta-induced secretion of IL-6, IL-8, LIF, MMP-1, and MMP-3. A similar augmentation was also observed in tumor necrosis factor (TNF)-alpha-induced cytokine and MMP secretion. IL-17A and IL-17F rapidly induced phosphorylation of extracellular signal-regulated kinases (ERK) 1/2, p38 MAPKs, and c-Jun-NH2-terminal kinase (JNK) as early as 15min after stimulation. Inhibitors for ERK (PD98059 and U0216) and p38 MAPK (SB203580) significantly reduced the IL-17F-induced IL-6, IL-8, LIF, MMP-1, and MMP-3 secretion. Conclusions. Among IL-17 family members, IL-17A and IL-17F strongly stimulate human colonic SEMFs, inducing inflammatory responses.
引用
收藏
页码:746 / 753
页数:8
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