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Inhibition of KDM4A activity as a strategy to suppress interleukin-6 production and attenuate colitis induction

机译:KDM4A活性的抑制作用作为抑制白细胞介素-6生产和衰减结肠炎诱导的策略

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摘要

4-Chloro-7-nitro-2,1,3-benzoxadiazole (NBD-CI) functions as a hapten and fluoresces upon binding to proteins. Therefore, fluorescence visualization of hapten-proteins is a feature of the colitis induced by NBD-Cl. Using this colitis model, we located activated fibroblasts in the vicinity of hapten-proteins upon colitis induction and observed interleukin (IL)-6 production in the activated fibroblasts. We screened herbal ingredients using primary fibroblasts stimulated with tumor necrosis factor alpha (TNF-alpha) and found the suppressive action of Atractylodin on IL-6 production. Under TNF-alpha stimulation, Atractylodin induced the tri-methylation of histone H3 at lysine residue 9, which impaired the binding between NF-kappa B and the IL-6 promoter on the genomic DNA. Atractylodin inhibited KDM4A but not KDM6A activity. Atractylodin administration attenuated colitis induction. The KDM4A inhibitor ML324 showed similar actions on IL-6 production and colitis induction. We propose the inhibition of KDM4A activity as a strategy to suppress IL-6 production and attenuate colitis induction. (C) 2017 Elsevier Inc. All rights reserved.
机译:4-氯-7-硝基-2,1,3-苯并二唑(NBD-CI)在与蛋白质结合时用作半抗原和荧光。因此,Hapten-proteins的荧光可视化是Nbd-cl诱导的结肠炎的特征。使用这种结肠炎模型,我们定位在结肠炎诱导和观察到活化的成纤维细胞中的白细胞介素(IL)-6产生时在Hapten-蛋白附近的活化成纤维细胞。我们使用用肿瘤坏死因子α(TNF-α)刺激的原发性成纤维细胞筛选草药成分,并发现亚替坦二丁蛋白对IL-6产生的抑制作用。在TNF-α刺激下,Atractylodin在赖氨酸残基9上诱导组蛋白H3的三甲基化,其在基因组DNA上损害NF-Kappa B和IL-6启动子之间的结合。 atractylodin抑制KDM4A但不是KDM6A活性。 atractylodin给药减毒结肠炎诱导。 KDM4A抑制剂ML324显示出对IL-6产生和结肠炎诱导的类似作用。我们提出抑制KDM4A活性作为抑制IL-6生产和衰减结肠炎诱导的策略。 (c)2017年Elsevier Inc.保留所有权利。

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