首页> 外文期刊>Cellular Signalling >CNOT7/hCAF1 is involved in ICAM-1 and IL-8 regulation by tristetraprolin
【24h】

CNOT7/hCAF1 is involved in ICAM-1 and IL-8 regulation by tristetraprolin

机译:CNOT7 / hCAF1参与tristetraprolin的ICAM-1和IL-8调节

获取原文
获取原文并翻译 | 示例
           

摘要

Tristetraprolin (TTP) is an RNA-binding protein which can bind to the AU-rich elements (AREs) at the 3'- untranslated region (3'-UTR) of target mRNA and promote mRNA deadenylation and degradation. We have shown in a previous study that TTP regulates tumor necrosis factor-α (TNF-α)-induced expression of intercellular adhesion molecule-1 (ICAM-1) and interleukin-8 (IL-8), both of whose mRNAs have AREs in the 3'-UTR, in human pulmonary microvascular endothelial cells (HPMEC) through destabilizing target mRNAs, nevertheless, the mechanismbywhich TTP promotesmRNA decay remains unclear. Observations have indicated that TTP can interact with CAF1 (CNOT7/hCAF1 in human), a subunit of the CCR4-NOT complex with deadenylase activity. Another study illustrated that TTP can directly bind to CNOT1, the scaffold subunit of the CCR4-NOT complex. The present study showed that TTP bound to the AREs of ICAM-1 and IL-8 mRNAs and was coimmunoprecipitated with intracellular ICAM-1 and IL-8 mRNAs. TTP, CNOT7 and CNOT1 were coimmunoprecipitated in HPMEC. CNOT7 silencing stabilized ICAM-1 and IL-8 mRNAs and increased ICAM-1 and IL-8 production following TNF-α stimulation. These results, together with our previous study, suggest that CNOT7/hCAF1 is involved in ICAM-1 and IL-8 regulation by TTP in HPMEC.
机译:Tristetraprolin(TTP)是一种RNA结合蛋白,可以与靶mRNA的3'-非翻译区(3'-UTR)的富含AU的元件(ARE)结合并促进mRNA腺苷酸化和降解。我们在先前的研究中表明,TTP调节肿瘤坏死因子-α(TNF-α)诱导的细胞间粘附分子1(ICAM-1)和白细胞介素8(IL-8)的表达,它们的mRNA均具有AREs然而,在3'-UTR中,在人类肺微血管内皮细胞(HPMEC)中,通过破坏目标mRNA的稳定性,TTP促进mRNA衰变的机制仍不清楚。观察结果表明,TTP可以与CAF1(人中的CNOT7 / hCAF1)相互作用,而CAF1是具有去甲腺苷酸酶活性的CCR4-NOT复合物的亚基。另一项研究表明,TTP可以直接与CNO4-NOT复合体的支架亚基CNOT1结合。本研究表明TTP与ICAM-1和IL-8 mRNA的ARE结合,并与细胞内ICAM-1和IL-8 mRNA共免疫沉淀。在HPMEC中共免疫沉淀了TTP,CNOT7和CNOT1。 TNF-α刺激后,CNOT7沉默可稳定ICAM-1和IL-8 mRNA并增加ICAM-1和IL-8的产生。这些结果以及我们以前的研究表明,CNOT7 / hCAF1参与了HPMEC中TTP对ICAM-1和IL-8的调节。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号