当前位置: X-MOL 学术Genes Cells › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Circadian expression of Glycoprotein 2 (Gp2) gene is controlled by a molecular clock in mouse Peyer's patches.
Genes to Cells ( IF 1.3 ) Pub Date : 2020-03-03 , DOI: 10.1111/gtc.12758
Naoki Kusunose 1 , Akito Tsuruta 1 , Kengo Hamamura 2 , Yuya Tsurudome 1 , Yuya Yoshida 1 , Takahiro Akamine 3 , Naoya Matsunaga 1, 4 , Satoru Koyanagi 1, 4 , Shigehiro Ohdo 1
Affiliation  

The expression levels of many cell-surface proteins vary with the time of day. Glycoprotein 2 (Gp2), specifically expressed on the apical surface of M cells in Peyer's patches, functions as a transcytotic receptor for mucosal antigens. We report that cAMP response element-binding protein (CREB) regulates the transcription of the Gp2 gene, thereby generating the circadian change in its expression in mouse Peyer's patches. The transcytotic receptor activity of Gp2 was increased during the dark phase when the Gp2 protein abundance increased. Rhythmic expression of clock gene mRNA was observed in mouse Peyer's patches, and expression levels of Gp2 mRNA also exhibited circadian oscillation, with peak levels during the early dark phase. The promoter region of the mouse Gp2 gene contains several cAMP response elements (CREs). Chromatin immunoprecipitation assays revealed that CREB bound to the CREs in the Gp2 gene in Peyer's patches. Forskolin, which promotes CREB phosphorylation, increased the transcription of the Gp2 gene in Peyer's patches. As phosphorylation of CREB protein was increased when Gp2 gene transcription was activated, CREB may regulate the rhythmic expression of Gp2 mRNA in Peyer's patches. These findings suggest that intestinal immunity is controlled by the circadian clock system.

中文翻译:

糖蛋白2(Gp2)基因的昼夜节律表达受小鼠Peyer斑块中的分子钟控制。

许多细胞表面蛋白的表达水平随一天的时间而变化。糖蛋白2(Gp2),特别是在Peyer斑块中M细胞的顶表面表达,可作为粘膜抗原的跨细胞受体。我们报告cAMP反应元件结合蛋白(CREB)调节Gp2基因的转录,从而在其在小鼠Peyer斑块中的表达中产生昼夜节律变化。在黑暗阶段,当Gp2蛋白丰度增加时,Gp2的跨细胞受体活性增加。在小鼠Peyer斑中观察到时钟基因mRNA的节律性表达,Gp2 mRNA的表达水平也表现出昼夜节律性振荡,在早期黑暗阶段达到峰值。小鼠Gp2基因的启动子区域包含几个cAMP反应元件(CRE)。染色质免疫沉淀试验表明,CREB与Peyer斑块中Gp2基因中的CRE结合。促进CREB磷酸化的Forskolin增加了Peyer斑块中Gp2基因的转录。由于激活Gp2基因转录后CREB蛋白的磷酸化增加,CREB可能调节Peyer斑块中Gp2 mRNA的节律表达。这些发现表明肠道免疫力由生物钟系统控制。CREB可能调节Peyer斑块中Gp2 mRNA的节律性表达。这些发现表明肠道免疫力由生物钟系统控制。CREB可能调节Peyer斑块中Gp2 mRNA的节律性表达。这些发现表明肠道免疫力由生物钟系统控制。
更新日期:2020-03-03
down
wechat
bug