Nuclear Factor Kappa B Mediates Interleukin–8 Production in Eosinophils

Nuclear Factor Kappa B Mediates Interleukin–8 Production in Eosinophils
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核因子 Kappa B 介导嗜酸性粒细胞中白细胞介素 8 的产生

DOI:
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发表时间:
1999
影响因子:
2.8
通讯作者:
K. Ohta
K. Ohta
中科院分区:
医学3区
文献类型:
--
作者:
N. Yamashita;H. Koizumi;N. Yamashita;M. Murata;K. Mano;K. Ohta

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背景:最近的报告表明,为了应对各种刺激,嗜酸性粒细胞会产生多种细胞因子(例如 IL-8),这些细胞因子在过敏性炎症中发挥着关键作用。在这方面,转录因子核因子 Kappa B (NF-κB) 是单核细胞、淋巴细胞和中性粒细胞中肿瘤坏死因子 α (TNF-α) 诱导的 IL-8 基因表达的重要激活剂。因此,我们研究了 NF-κB 在促炎细胞因子、粒细胞-单核细胞集落刺激因子 (GM-CSF) 和 TNF-α 刺激嗜酸性粒细胞诱导的细胞因子产生中所起的作用。方法:从患有轻度至中度嗜酸性粒细胞增多的人类受试者中获取外周血样本。使用免疫组织化学和凝胶位移测定研究了将细胞暴露于 GM-CSF 和/或 TNF-α 引起的 NF-κB 激活。为了从功能上评估 NF-κB 易位的影响,还使用酶联免疫吸附测定检查了 IL-8 的产生。结果:用 GM-CSF + TNF-α 刺激嗜酸性粒细胞可诱导 IL-8 的合成和分泌显着增加,这与 NF-κB p50 易位至细胞核相关。 NF-κB 与 DNA 的结合通过凝胶位移测定进行验证。 IL-8 的产生受到 N-乙酰基-L-半胱氨酸、FK506 和 MG-132(NF-κB 激活和易位抑制剂)的显着抑制。结论:根据我们的研究结果,我们得出结论,NF-κB 的激活和易位在导致嗜酸性粒细胞合成和释放 IL-8 的信号转导途径中发挥着至关重要的作用。
Background: Recent reports indicate that in response to various stimuli, eosinophils produce a variety of cytokines (e.g. IL–8) which play pivotal roles in allergic inflammation. In that regard, the transcription factor, nuclear factor, Kappa B (NF–κB), is an important activator of tumor–necrosis–factor–alpha (TNF–α)–induced IL–8 gene expression in monocytes, lymphocytes and neutrophils. We therefore investigated the role played by NF–κB in cytokine production induced by stimulation of eosinophils with the proinflammatory cytokines, granulocyte–monocyte colony–stimulating factor (GM–CSF) and TNF–α. Methods: Peripheral blood samples were obtained from human subjects with slight to moderate eosinophilia. NF–κB activation elicited by exposing cells to GM–CSF and/or TNF–α was investigated using immunohistochemistry and gel shift assays. To functionally assess the effects of NF–κB translocation, IL–8 production was also examined using an enzyme–linked immunosorbent assay. Results: Stimulation of eosinophils with GM–CSF + TNF–α induced significant increases in the synthesis and secretion of IL–8 which were associated with translocation of NF–κB p50 into the nucleus. The binding of NF–κB to the DNA was verified by the gel shift assays. IL–8 production was significantly inhibited by N–acetyl–L–cysteine, FK506 and MG–132, inhibitors of NF–κB activation and translocation. Conclusion: On the basis of our findings, we conclude that activation and translocation of NF–κB plays a crucial role in the signal–transduction pathway leading to the synthesis and release of IL–8 by eosinophils.
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期刊: Journal of immunology (Baltimore, Md. : 1950)
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DOI: --
发表时间: 1996
期刊: Journal of immunology (Baltimore, Md. : 1950)
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DOI: 10.1073/pnas.87.12.4884
发表时间: 1990-06-01
影响因子: 11.1
作者:
ROEDERER, M;STAAL, FJT;HERZENBERG, LA
通讯作者: HERZENBERG, LA