Post-transcriptional regulation in lymphocytes: the case of CD154.

Post-transcriptional regulation in lymphocytes: the case of CD154.
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DOI:
10.4161/rna.6.3.8581
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发表时间:
2009-07
期刊:
影响因子:
4.1
通讯作者:
Covey LR
Covey LR
中科院分区:
生物学3区
文献类型:
--
作者:
Vavassori S;Covey LR

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mRNA 衰变的控制正在成为免疫和非免疫细胞中基因表达的重要控制点和主要贡献者。负责转录本降解的蛋白质因子和顺式作用元件的鉴定已经阐明了调节和建立降解过程所需的精确协调事件的全面图景。 CD40 配体(CD154 或 CD40L)是一种在转录后水平受到高度调控的基因。 CD4+ T 细胞上的 CD154 受到转录和转录后过程相互作用网络的严格控制,从而在抗原刺激的整个过程中产生精确的蛋白质表面水平。多嘧啶束结合蛋白 (PTB) 复合物激活诱导的 CD154 转录物稳定是与 CD154 的时间表达相对应的关键事件。在这篇综述中,我们讨论了淋巴细胞中主要 mRNA 衰减途径的已知和潜在作用,并重点关注导致激活的 CD4+ T 细胞表达 CD154 的独特转录后机制。
The control of mRNA decay is emerging as an important control point and a major contributor to gene expression in both immune and non-immune cells. The identification of protein factors and cis-acting elements responsible for transcript degradation has illuminated a comprehensive picture of precisely orchestrated events required to both regulate and establish the decay process. One gene that is highly regulated at the posttranscriptional level is CD40 ligand (CD154 or CD40L). CD154 on CD4+ T cells is tightly controlled by an interacting network of transcriptional and posttranscriptional processes that result in precise surface levels of protein throughout an extended time course of antigen stimulation. The activation-induced stabilization of the CD154 transcript by a polypyrimidine tract-binding protein (PTB)-complex is a key event that corresponds to the temporal expression of CD154. In this review, we discuss known and potential roles of major mRNA decay pathways in lymphocytes and focus on the unique posttranscriptional mechanisms leading to CD154 expression by activated CD4+ T cells.
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