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Effect of 5, 6, 7, 8-Tetrahydroneopterin on the Bovine Endothelial Cell Injury Induced by Cumene Hydroperoxide

机译:5、6、7、8-四氢蝶呤类化合物对氢过氧化异丙苯引起的牛内皮细胞损伤的影响

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References(20) Cited-By(7) Neopterin is an 2-amino-4-hydroxypteridine derivative and a precursor of biopterin, which is derived from guanosine triphosphate. Previously, we have reported that 5, 6, 7, 8-tetrahydroneopterin (NPH4), a reduced form of neopterin, possesses an antioxidant activity in various systems. In this study, we investigated the activity in more detailed manner and discussed the possible applications of this antioxidant. Analysis by electron spin resonance spectrometry indicated that NPH4 scavenged superoxide anion radicals and hydroxyl radicals as well. Moreover, NPH4 protected the rat brain homogenate from autoxidation. Next, we examined the effect of NPH4 on the cell injury induced by cumene hydroperoxide (CHP) in cultured bovine artery endothelial cells. The activity of lactate dehydrogenase, a marker enzyme of cell injury, was elevated by CHP in a dose-dependent manner, and this elevation was dose-dependently suppressed by NPH4. The elevation of lipid peroxide content was also inhibited by NPH4 in the same fashion. These data suggest that NPH4 would be effective against various diseases whose pathogenesis is active oxygenrelated.
机译:参考文献(20)Cited-By(7)新蝶呤是一种2-氨基-4-羟基蝶啶衍生物,是一种新蝶呤的前体,它是从三磷酸鸟苷衍生而来的。以前,我们已经报道了5、6、7、8-四氢蝶呤(NPH4)(一种新蝶呤的还原形式)在各种系统中均具有抗氧化活性。在这项研究中,我们以更详细的方式研究了该活性,并讨论了该抗氧化剂的可能应用。电子自旋共振光谱分析表明,NPH4还清除了超氧阴离子自由基和羟基自由基。而且,NPH4保护大鼠脑匀浆免受自氧化作用。接下来,我们研究了NPH4对在培养的牛动脉内皮细胞中由氢过氧化枯烯(CHP)诱导的细胞损伤的影响。 CHP以剂量依赖的方式提高了乳酸脱氢酶(一种细胞损伤的标记酶)的活性,而NPH4则以剂量依赖的方式抑制了这种升高。 NPH4也以相同的方式抑制脂质过氧化物含量的升高。这些数据表明,NPH4将有效对抗其发病机制与活性氧有关的各种疾病。

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