Identification of the posttranscriptional regulatory network of the pro-inflammatory cytokine HMGB1

促炎细胞因子 HMGB1 转录后调控网络的鉴定

• 批准号: 371668-2009
• 负责人: Gallouzi, Imed
• 金额: $ 4.08万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=434926
• 关键词: Identification; posttranscriptional; regulatory; network; pro

The eradication of pathogenic infection is accomplished by the activation of immune responses in individuals. Although beneficial, the aberrant activation of these responses may cause deleterious consequences which can ultimately be detrimental. These immune responses are mediated by factors named cytokines which are produced predominately by white blood cells of the immune system. One such factor, named High Mobility Group Box1 (HMGB1), as recently been shown to play a pronominal role in the pathogen induced immune response. The generation of protein from DNA requires the synthesis of an intermediate molecule named RNA. RNA thus serves as a template from which DNA genes are converted into proteins. The generation of protein from RNA is mediated by proteins named RNA binding proteins. Our laboratory is working on an RNA binding protein named HuR and our preliminary data indicate that this protein is involved in the regulation of HMGB1 mRNA. The purpose of this proposal is to identify all sequences in the HMGB1 mRNA mediating its expression in white blood cells and determine consequently the network of RNA binding proteins which, in addition to HuR, regulate the expression of HMGB1. Determining the mechanisms through which these RNA binding proteins regulate the HMGB1 mRNA may enable the identification of identify potential anti-inflammatory compounds which may lower the morbidity and mortality associated to exuberant cytokine production.

病原体感染的根除是通过激活个体的免疫应答来实现的。 尽管这些反应的异常激活是有益的，但可能导致最终可能是有害的有害后果。这些免疫应答由称为细胞因子的因子介导，所述细胞因子主要由免疫系统的白色血细胞产生。 其中一个因子，命名为高迁移率族蛋白盒1（HMGB1），最近被证明在病原体诱导的免疫应答中起代名词作用。 从DNA生成蛋白质需要合成一种名为RNA的中间分子。因此，RNA充当DNA基因转化为蛋白质的模板。由RNA产生蛋白质是由称为RNA结合蛋白的蛋白质介导的。 我们的实验室正在研究一种名为HuR的RNA结合蛋白，我们的初步数据表明该蛋白参与HMGB1 mRNA的调节。 本提案的目的是鉴定HMGB 1 mRNA中介导其在白色血细胞中表达的所有序列，并因此确定除HuR外还调节HMGB 1表达的RNA结合蛋白网络。 确定这些RNA结合蛋白调节HMGB1 mRNA的机制可能有助于鉴定潜在的抗炎化合物，这些化合物可能降低与细胞因子产生旺盛相关的发病率和死亡率。