E2F-1调节核因子-kappaB活性和细胞粘附:转录因子E2F-1的潜在抗炎活性
Min Chen1, Carrie Capps, James T Willerson
1Wafic Said Gene Therapy Research Laboratory, Texas Heart Institute and Department of Medicine, University of Texas-Houston Medical School, Houston, Tex 77030, USA.
Circulation
|November 20, 2002
概括
过度表达E2F-1抑制内皮细胞中核因子-kappaB (NF-κB) 的激活,减少炎症反应和细胞粘附. 这表明E2F-1可能通过稳定IκB.在预防动脉样硬化方面发挥作用.
科学领域:
- 内皮细胞生物学 内皮细胞生物学
- 炎症的分子机制.
- 心血管疾病的研究研究.
背景情况:
- 转录因子E2F-1在内皮细胞中的作用,特别是其抗炎作用,以前是未知的.
- 瘤亡因子-α (TNF-α) 是内皮细胞中一个关键的炎症媒介.
研究的目的:
- 研究E2F-1过度表达在人类大动脉内皮细胞 (HAECs) 中的潜在抗炎作用.
- 为了确定E2F-1是否会影响对TNF-α的反应中核因子-kappaB (NF-κB) 信号通路.
主要方法:
- 利用免疫阻塞,免疫光和电泳运动转移试验来分析蛋白质局部化和DNA结合.
- 在HAEC中使用重组腺病毒过度表达E2F-1.
- 评估了粘附分子 (ICAM-1,VCAM-1,E-selectin) 和单细胞细胞粘附的表达.
主要成果:
- 在HAEC中,E2F-1过度表达显著降低了TNF-α诱导的NF-κB p65核转位.
- E2F-1 阻止了NF-κB p65与其结合域的结合.
- 在过度表达E2F-1-的细胞中,TNF-α诱导的粘附分子表达和单细胞粘附显著减少,这与化IκB-α的减少有关.
结论:
- E2F-1稳定了IκB,从而抑制了内皮细胞中NF-κB的激活.
- 通过抑制NF-κB依赖的内皮粘附分子表达和细胞粘附,E2F-1可能会产生抗动脉产生作用.
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