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EXPRESSION PROFILE OF DNA DAMAGE SIGNALING GENES IN 2 GY PROTON EXPOSED MOUSE BRAIN.

机译:DNA损伤信号转基因基因在2 GY质子暴露的小鼠脑中的表达谱。

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Exposure of living systems to radiation results in a wide assortment of lesions, the most signicant of is damage to genomic DNA which alters specie cell functions including cell proliferation. The radiation induced DNA damage investigation is one of the important area in biology, but still the information available regarding the effects of proton is very limited. In this report, we investigated the differential gene expression pattern of DNA damage signaling genes such as damaged DNA binding, repair, cell cycle arrest, checkpoints and apoptosis using quantitative real-time RT-PCR in proton exposed mouse brain tissues. The expression profiles showed signficant changes in DNA damage related genes in 2 Gy proton exposed mouse brain tissues as compared to control brain tissues. Furthermore, we also show that signicantly increased levels of apoptotic related genes, caspase-3 and 8 activities in these cells, suggesting that in addition to differential expression of DNA damage genes, the alteration of apoptosis related genes may also contribute to the radiation induced DNA damage followed by programmed cell death. In summary, our findings suggest that proton exposed cells undergo severe DNA damage which in turn destabilize the chromatin stability.
机译:生命系统暴露于辐射下会导致各种各样的病变,最显着的是对基因组DNA的损害,这种损害会改变物种的细胞功能,包括细胞增殖。辐射诱导的DNA损伤研究是生物学中的重要领域之一,但是有关质子作用的可用信息仍然非常有限。在此报告中,我们使用定量实时RT-PCR在质子暴露的小鼠脑组织中研究了DNA损伤信号转导基因的差异基因表达模式,例如DNA损伤受损,修复,细胞周期停滞,检查点和细胞凋亡。表达谱显示,与对照脑组织相比,暴露于2 Gy质子的小鼠脑组织中DNA损伤相关基因的显着变化。此外,我们还表明,这些细胞中凋亡相关基因,caspase-3和8活性的水平显着增加,这表明除了DNA损伤基因的差异表达外,凋亡相关基因的改变也可能有助于辐射诱导的DNA。继之以程序性细胞死亡。总而言之,我们的发现表明质子暴露的细胞遭受了严重的DNA损伤,进而破坏了染色质的稳定性。

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