RelB Modulation of IκBα Stability as a Mechanism of Transcription Suppression of Interleukin-1α (IL-1α), IL-1β, and Tumor Necrosis Factor Alpha in Fibroblasts
RelB Modulation of IκBα Stability as a Mechanism of Transcription Suppression of Interleukin-1α (IL-1α), IL-1β, and Tumor Necrosis Factor Alpha in Fibroblasts
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RelB 调节 IκBα 稳定性作为成纤维细胞中白细胞介素 1α (IL-1α)、IL-1β 和肿瘤坏死因子 α 转录抑制的机制
DOI:
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发表时间:
1999
影响因子:
5.3
通讯作者:
Lili Feng
中科院分区:
文献类型:
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作者:
Yiyang Xia;Shizhong Chen;Yibin Wang;N. Mackman;G. Ku;David Lo;Lili Feng
ABSTRACT Members of the NF-κB/RelB family of transcription factors play important roles in the regulation of inflammatory and immune responses. RelB, a member of this family, has been characterized as a transcription activator and is involved in the constitutive NF-κB activity in lymphoid tissues. However, in a previous study we observed an overexpression of chemokines in RelB-deficient fibroblasts. Here we show that RelB is an important transcription suppressor in fibroblasts which limits the expression of proinflammatory mediators and may exert its function by modulating the stability of IκBα protein. Fibroblasts from relb −/− mice overexpress interleukin-1α (IL-1α), IL-1β, and tumor necrosis factor alpha in response to lipopolysaccharide (LPS) stimulation. These cells have an augmented and prolonged LPS-inducible IKK activity and an accelerated degradation which results in a diminished level of IκBα protein, despite an upregulated IκBα mRNA expression. Consequently, NF-κB activity was augmented and postinduction repression of NF-κB activity was impaired in these cells. The increased κB-binding activity and cytokine overexpression was suppressed by introducing RelB cDNA or a dominant negative IκBα into relb −/−fibroblasts. Our findings suggest a novel transcription suppression function of RelB in fibroblasts.
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DOI:
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发表时间:
1995
期刊:
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影响因子:
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作者:
J. Brockman;D. Scherer;T. McKinsey;S. M. Hall;X. Qi;Wha-Young Lee;Anddean W. Ballard
通讯作者:
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DOI:
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发表时间:
1997
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
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作者:
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通讯作者:
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DOI:
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发表时间:
1996
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
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作者:
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通讯作者:
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DOI:
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发表时间:
1992
期刊:
The American journal of pathology
影响因子:
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作者:
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通讯作者:
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DOI:
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发表时间:
1997-08
期刊:
The American journal of pathology
影响因子:
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作者:
Roger S Smith;Terry J. Smith;T. Blieden;R. Phipps
通讯作者:
Roger S Smith;Terry J. Smith;T. Blieden;R. Phipps