Stimulation of Interleukin-8 Production by Okadaic Acid and Vanadate in a Human Promyelocyte Cell Line, an HL-60 Subline

Stimulation of Interleukin-8 Production by Okadaic Acid and Vanadate in a Human Promyelocyte Cell Line, an HL-60 Subline
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冈田酸和钒酸盐刺激人早幼粒细胞系(HL-60 亚系)中白细胞介素 8 的产生

DOI:
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发表时间:
1997
影响因子:
4.8
通讯作者:
N. Mukaida
N. Mukaida
中科院分区:
生物学2区
文献类型:
--
作者:
Y. Sonoda;T. Kasahara;Y. Yamaguchi;K. Kuno;K. Matsushima;N. Mukaida

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大多数类型的细胞可以响应于各种炎症刺激而产生白细胞介素(IL)-8。为研究蛋白磷酸酶在IL-8产生的信号转导中的作用,用磷酸丝氨酸/磷酸苏氨酸磷酸酶和磷酸酪氨酸磷酸酶抑制剂冈田酸(OA)和原钒酸钠(VA)分别处理HL-60(C-15)细胞亚系。OA和VA均显著增加HL-60细胞中IL-8的分泌,高达200倍。OA和VA刺激伴随着IL-8 mRNA表达的显著增加以及转录因子NF-κB的活化。此外,氯霉素乙酰转移酶检测证实了NF-κB位点在IL-8基因活化中的重要作用。OA或VA产生的IL-8被蛋白激酶抑制剂抑制,包括星形孢菌素、H-7、K252 a、除莠霉素A和染料木黄酮。OA和VA均诱导p44的显著酪氨酸磷酸化,推测其为Erk 1,其为促分裂原活化蛋白激酶家族的成员,伴随促分裂原活化蛋白激酶活性的活化。同时,观察到NF-κB的抑制组分IκB-α的快速降解。由于OA激活的Erk 1在体外可磷酸化重组IκB-α,我们推测Erk 1参与了IκB-α的磷酸化和随后的降解,从而导致IL-8基因转录的激活。
Most types of cells can produce interleukin (IL)-8 in response to various inflammatory stimuli. To study the role of protein phosphatases in the signal transduction leading to IL-8 production, a subline of HL-60 (C-15) was treated with okadaic acid (OA) and sodium orthovanadate (VA), inhibitors of phosphoserine/phosphothreonine phosphatase and phosphotyrosine phosphatase, respectively. Both OA and VA dramatically increased IL-8 secretion up to 200-fold in the HL-60 cells. OA and VA stimulation was accompanied by a marked increase in IL-8 mRNA expression and also by activation of a transcription factor, NF-κB. In addition, an essential role of the NF-κB site in the IL-8 gene activation was confirmed by the chloramphenicol acetyltransferase assay. IL-8 production by OA or VA was inhibited by protein kinase inhibitors, including staurosporine, H-7, K252a, herbimycin A, and genistein. Both OA and VA induced significant tyrosine phosphorylation of p44, which was presumed to be Erk1, a member of the mitogen-activated protein kinase family, with concomitant activation of the mitogen-activated protein kinase activity. In parallel, rapid degradation of IκB-α, an inhibitory component of NF-κB, was observed. Since OA-activated Erk1 phosphorylated recombinant IκB-αin vitro, we assumed that Erk1 is involved in the phosphorylation and subsequent degradation of IκB-α, thus leading to the activation of IL-8 gene transcription.
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DOI: --
发表时间: 1993
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发表时间: 1992
期刊: The Journal of biological chemistry
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发表时间: 1993
期刊: The Journal of biological chemistry
影响因子: --
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发表时间: 1989-03-17
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影响因子: 56.9
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