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首页> 外文期刊>International Journal of Molecular Sciences >Diurnal Expression of the Per2 Gene and Protein in the Lateral Habenular Nucleus
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Diurnal Expression of the Per2 Gene and Protein in the Lateral Habenular Nucleus

机译:Ha侧核中Per2基因和蛋白质的昼夜表达

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The suprachiasmatic nucleus plays an important role in generating circadian rhythms in mammals. The lateral habenular nucleus (LHb) is closely linked to this structure. Interestingly, the LHb shows a rhythmic firing rate in vivo and in vitro, and sustained oscillation of rhythmic genes in vitro. However, under the in vivo condition, whether rhythmic gene expression in the LHb has circadian rhythms remains unknown. In this study, we examined LHb tissue in rats to determine Period2 (Per2) gene and protein expression at six zeitgeber time points (ZT2, ZT6, ZT10, ZT14, ZT18, and ZT22) in a 12-h light and 12-h dark (LD) environment. We found that in the LD environment, Per2 gene expression and PER2 protein levels in the LHb were higher in the day and lower in the night, showing periodic oscillation, with a peak at ZT10 and a trough at ZT22 (Per2 mRNA) and ZT18 (PER2 protein). We conclude that Per2 expression and PER2 protein levels in the LHb have rhythmic oscillation in vivo. This study provides a basis for further study on the role of the LHb in the circadian rhythm system.
机译:视交叉上核在哺乳动物的昼夜节律中起重要作用。外侧ha状核(LHb)与该结构紧密相连。有趣的是,LHb在体内和体外均显示出有节奏的放电速率,并且在体外具有持续的节奏基因振荡。然而,在体内条件下,LHb中的节律基因表达是否具有昼夜节律仍是未知的。在这项研究中,我们检查了大鼠的LHb组织,以确定在12小时光照和12小时黑暗中六个Zeitgeber时间点(ZT2,ZT6,ZT10,ZT14,ZT18和ZT22)的Period2(Per2)基因和蛋白质表达(LD)环境。我们发现在LD环境中,LHb中的Per2基因表达和PER2蛋白水平在白天较高,在夜间较低,表现出周期性振荡,在ZT10达到峰值,在ZT22(Per2 mRNA)和ZT18处于低谷( PER2蛋白)。我们得出结论,LHb中的Per2表达和PER2蛋白水平在体内具有节律性振荡。该研究为进一步研究LHb在昼夜节律系统中的作用提供了基础。

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