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Nitric Oxide Donor Regulated mRNA Expressions of LTC4 Synthesis Enzymes in Hepatic Ischemia Reperfusion Injury Rats

机译:一氧化氮供体调节肝缺血再灌注损伤大鼠LTC4合成酶的mRNA表达

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Cysteinyl LTs were associated with hepatic ischemia and reperfusion (I/ R) injury. LTC4 synthesis enzymes including leukotriene C4 synthase (LTC_4S), microsomal glutathione S-transferase (mGST) 2 and mGST3 can all conjugate LTA4 and reduced glutathione (GSH) to form LTC4, which involved hepatic ischemia-reperfusion (I/R) injury. This experiment was designed to further investigate the effects of V-PYRRO/NO (a selective liver nitric oxide donor)on the gene expressions of LTC4 synthesis enzymes during hepatic I/R. Adult male SD rats were divided into 3 groups: sham group (Control), I/R group and V-PYRRO/ NO + I/R groups. Liver subjected to 1 h of partial hepatic ischemia followed by 5 h of reperfusion, saline or V-PYRRO/NO (1.06 μmol/kg/h) was administered intravenously through all the experimental periods. The mRNA levels of LTC4 synthesis enzymes in rat liver tissue were examined by RT-PCR. We observed that hepatic mRNA expressions of LTC4S and mGST3 were lower whereas mGST2 mRNA levels were higher in V-PYRRO/NO +I/R group than those in I/R group. Compared with control, only mGST3 mRNA was significantly declined in V-PYRRO/NO +I/R groups. These results suggest that NO donor V-PYRRO/NO can downregulate the mRNA expressions of LTC_4S and mGST3 but upregulate mGST2 mRNA expressions during hepatic I/R injury.
机译:半胱氨酸LTs与肝缺血和再灌注(I / R)损伤相关。 LTC4合成酶包括白三烯C4合酶(LTC_4S),微粒体谷胱甘肽S-转移酶(mGST)2和mGST3都可以缀合LTA4和还原型谷胱甘肽(GSH)形成LTC4,这涉及肝缺血再灌注(I / R)损伤。本实验旨在进一步研究V-PYRRO / NO(选择性肝一氧化氮供体)对肝I / R期间LTC4合成酶基因表达的影响。将成年雄性SD大鼠分为3组:假手术组(对照组),I / R组和V-PYRRO / NO + I / R组。在所有实验期间,静脉内给予部分肝局部缺血1小时,再灌注5小时的肝,盐水或V-PYRRO / NO(1.06μmol/ kg / h)。用RT-PCR检测大鼠肝组织中LTC4合成酶的mRNA水平。我们观察到,V-PYRRO / NO + I / R组的LTC4S和mGST3的肝mRNA表达较低,而mGST2 mRNA的水平高于I / R组。与对照组相比,V-PYRRO / NO + I / R组仅mGST3 mRNA显着下降。这些结果表明,NO供体V-PYRRO / NO可以在肝I / R损伤过程中下调LTC_4S和mGST3的mRNA表达,但上调mGST2的mRNA表达。

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