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Correlation analysis of CCAAT/enhancer-binding proteins and their regulated genes with rat liver regeneration

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Author:: No author available

Journal Title:: WORLD CHINESE JOURNAL OF DIGESTOLOGY

Issue:: 20

DOI:: 10.3969/j.issn.1009-3079.2007.20.003

Key Word:: 部分肝切除;大鼠基因组230 2.0芯片;CCAAT增强子结合蛋白;肝再生相关基因

Abstract：目的:探讨基因转录水平CCAAT增强子结合蛋白(CEBPs)及其调节基因在肝再生(LR)中的作用.方法:将与肝再生相关的CEBPs家族转录因子输入NCBI(www.ncbi.nlm.nih.gov)和RGD(rgd.mcw.edu)等网站查找与其转录功能相关的文献,从中得出大鼠、小鼠和人的CEBPs家族下游基因.然后将人和小鼠基因与大鼠比对,筛选出与大鼠不重复的人和小鼠基因.再将他们与Rat Genome 230 2.0芯片的检测结果进行比对确认,把其中表达上调或下调2倍以上的基因视为有意义变化的大鼠同源基因.用Rat Genome 230 2.0芯片检测他们在大鼠再生肝中的表达情况,用真、假手术比较方法确定肝再生相关基因.结果:27个基因与肝再生相关,其中11个基因表达上调,6个基因表达下调,10个基因在有的时点表达上调,有的时点表达下调(简称上/下调表达).他们的上调范围为对照的2-128倍,下调范围为对照的2-16倍.肝再生启动[部分肝切除(PH)后0.5-4 h]、G0/G1过渡(PH后4-6h)、细胞增殖(PH后6-66 h)、细胞分化和组织结构功能重建(PH后72-168 h)等4个阶段起始表达的基因数分别为18,3,8和1;基因的总表达次数分别为18,11,25和16.表明相关基因主要在肝再生启动阶段起始表达,在不同阶段发挥作用.他们共表达上调126次,下调76次.表明肝再生中表达上调基因多于表达下调基因.结论:CEBPs及其调节的基因与肝再生中细胞增殖、细胞分化、细胞凋亡、炎症反应、应激反应、脂类代谢和细胞外基质变化等密切相关.

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