Interleukin-17A stimulates cardiac fibroblast proliferation and migration via negative regulation of the dual-specificity phosphatase MKP-1/DUSP-1.

Interleukin-17A stimulates cardiac fibroblast proliferation and migration via negative regulation of the dual-specificity phosphatase MKP-1/DUSP-1.
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DOI:
10.1016/j.cellsig.2011.10.010
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发表时间:
2012-02
影响因子:
4.8
通讯作者:
Chandrasekar B
Chandrasekar B
中科院分区:
生物学2区
文献类型:
--
作者:
Valente AJ;Yoshida T;Gardner JD;Somanna N;Delafontaine P;Chandrasekar B

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双特异性丝裂原激活蛋白激酶 (MAPK) 磷酸酶-1 (MKP-1) 通过去磷酸化使 MAP 激酶失活。在这里,我们发现促炎细胞因子白细胞介素 (IL)-17A 通过 IL-17 受体 A//IL-17 受体 C 依赖性 MKP-1 抑制以及 p38 MAPK 和 ERK1/2 的激活诱导成年小鼠原代心脏成纤维细胞 (CF) 增殖和迁移。 IL-17A 介导的 p38 MAPK 和 ERK1/2 激活受到 MKP-1 过表达的抑制,但通过 MKP-1 敲低而延长。 IL-17A 通过 PI3K/Akt 诱导 miR-101 表达,miR-101 抑制剂逆转 MKP-1 下调。重要的是,MKP-1 敲低、SB 203580 对 p38 MAPK 的抑制、U0126 和 PD 98059 对 ERK1/2 的抑制、或显性失活 MEK1 的过表达,均显着减弱了 IL-17A 介导的 CF 增殖和迁移。同样,IL-17F 和 IL-17A/F 异二聚体也通过 IL-17RA/IL-17RC 发出信号,刺激 CF 增殖和迁移。这些结果表明 IL-17A 通过 Akt/miR-101/MKP-1 依赖性 p38 MAPK 和 ERK1/2 激活刺激 CF 增殖和迁移。这些研究支持 IL-17 在心脏纤维化和不良心肌重塑中的潜在作用。
The dual-specificity mitogen-activated protein kinase (MAPK) phosphatase-1 (MKP-1) inactivates MAP kinases by dephosphorylation. Here we show that the proinflammatory cytokine interleukin (IL)-17A induces adult mouse primary cardiac fibroblast (CF) proliferation and migration via IL-17 receptor A//IL-17 receptor C-dependent MKP-1 suppression, and activation of p38 MAPK and ERK1/2. IL-17A mediated p38 MAPK and ERK1/2 activation is inhibited by MKP-1 overexpression, but prolonged by MKP-1 knockdown. IL-17A induced miR-101 expression via PI3K/Akt, and miR-101 inhibitor reversed MKP-1 down regulation. Importantly, MKP-1 knockdown, inhibition of p38 MAPK by SB 203580, inhibition of ERK1/2 by U0126 and PD 98059, or overexpression of dominant negative MEK1, each markedly attenuated IL-17A-mediated CF proliferation and migration. Similarly, IL-17F and IL-17A/F heterodimer that also signal via IL-17RA/IL-17RC, stimulated CF proliferation and migration. These results indicate that IL-17A stimulates CF proliferation and migration via Akt/miR-101/MKP-1-dependent p38 MAPK and ERK1/2 activation. These studies support a potential role for IL-17 in cardiac fibrosis and adverse myocardial remodeling.
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