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Control of hyperglycemia significantly improves oxidative stress profile of pancreatic islets

机译:控制高血糖症可显着改善胰岛的氧化应激状况

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Pancreatic islets are known to express low levels of antioxidant enzymes compared to other tissues and are therefore vulnerable to oxidative stress. Enhancing antioxidant defense mechanisms in pancreatic islets help them to cope better with oxidative stress. Persistent hyperglycemia under diabetic condition leads to continuous generation of reactive oxygen species, and different tissues exposed to this are oxidatively damaged depending on their antioxidant defense. Since islet cells are very poor in their antioxidant defense, our interest was to assess their antioxidant profile under normal, diabetic, insulin treated diabetic and untreated diabetic condition. On one hand, antioxidant defense was measured in terms of antioxidant enzymes and antioxidant molecules while on the other, damage caused to biomolecules was estimated. Our data demonstrate that oxidative damage to all biomolecules increased in islets cultured from diabetic animals, which enhanced further in islets from untreated diabetic animals. Insulin treatment significantly improved oxidative stress profile of islets indicating that the control of hyperglycemia leads to improvement in oxidative stress profile.
机译:已知胰岛与其他组织相比表达的抗氧化酶水平低,因此容易受到氧化应激的影响。增强胰岛中的抗氧化防御机制有助于他们更好地应对氧化应激。糖尿病状态下的持续性高血糖症会导致连续产生活性氧,暴露于此的不同组织会因其抗氧化防御能力而受到氧化损伤。由于胰岛细胞的抗氧化防御能力非常差,因此我们的兴趣是评估其在正常,糖尿病,胰岛素治疗的糖尿病和未治疗的糖尿病条件下的抗氧化特性。一方面,通过抗氧化酶和抗氧化分子来衡量抗氧化防御能力,另一方面,估计了对生物分子造成的损害。我们的数据表明,从糖尿病动物培养的胰岛对所有生物分子的氧化损伤增加,而在未经治疗的糖尿病动物的胰岛中进一步增强。胰岛素治疗显着改善了胰岛的氧化应激曲线,表明对高血糖症的控制导致氧化应激曲线的改善。

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