首页> 外文期刊>Biochemistry >Influence of SkQ1 on expression of Nrf2 gene, ARE-controlled genes of antioxidant enzymes and their activity in rat blood leukocytes under oxidative stress
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Influence of SkQ1 on expression of Nrf2 gene, ARE-controlled genes of antioxidant enzymes and their activity in rat blood leukocytes under oxidative stress

机译:SkQ1对氧化应激下大鼠血白细胞Nrf2基因表达,ARE控制的抗氧化酶基因及其活性的影响

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The study demonstrated that oxidative stress induced by hyperoxia (0.5 MPa for 90 min) resulted in reduction of mRNA levels of transcription factor Nrf2 and Nrf2-induced genes encoding antioxidant enzymes (SOD1, CAT, GPx4) in peripheral blood leukocytes of rats. The changes in gene expression profiles under hyperoxia were accompanied by disbalance of activity of antioxidant enzymes in the leukocytes, namely activation of superoxide dismutase and inhibition of catalase, glutathione peroxidase, and glutathione-S-transferase. Pretreatment of rats with SkQ1 (50 nmol/kg for five days) significantly increased mRNA levels of transcription factor Nrf2 and Nrf2-induced genes encoding antioxidant enzymes SOD2 and GPx4 and normalized the transcriptional activity of the SOD1 and CAT genes in the leukocytes in hyperoxia-induced oxidative stress. At the same time, the activity of catalase and glutathione peroxidase was increased, and the activity of superoxide dismutase and glutathione-S-transferase returned to the control level. It is hypothesized that protective effect of SkQ1 in hyperoxia-induced oxidative stress can be realized via a direct antioxidant property and the stimulation of the Keap1/Nrf2 redox-sensitive signaling system.
机译:研究表明,高氧诱导的氧化应激(0.5 MPa,持续90分钟)导致大鼠外周血白细胞中转录因子Nrf2和Nrf2诱导的编码抗氧化酶(SOD1,CAT,GPx4)编码基因的mRNA水平降低。高氧下基因表达谱的变化伴随着白细胞中抗氧化酶活性的失衡,即超氧化物歧化酶的活化和过氧化氢酶,谷胱甘肽过氧化物酶和谷胱甘肽-S-转移酶的抑制。用SkQ1预处理大鼠(50 nmol / kg,持续5天)可显着增加转录因子Nrf2和Nrf2诱导的编码抗氧化酶SOD2和GPx4的基因的mRNA水平,并使高氧血症白细胞中SOD1和CAT基因的转录活性正常化。诱导的氧化应激。同时,过氧化氢酶和谷胱甘肽过氧化物酶的活性增加,超氧化物歧化酶和谷胱甘肽-S-转移酶的活性恢复到对照水平。假设可以通过直接的抗氧化性能和Keap1 / Nrf2氧化还原敏感信号系统的刺激来实现SkQ1在高氧诱导的氧化应激中的保护作用。

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