首页> 外文期刊>Clinica chimica acta: International journal of clinical chemistry and applied molecular biology >Enhanced oxygen releasing capacity and oxidative stress in diabetes mellitus and diabetes mellitus-associated cardiovascular disease: a comparative study.
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Enhanced oxygen releasing capacity and oxidative stress in diabetes mellitus and diabetes mellitus-associated cardiovascular disease: a comparative study.

机译:糖尿病和与糖尿病相关的心血管疾病中增强的氧气释放能力和氧化应激:一项比较研究。

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BACKGROUND: Macrovascular disease, especially cardiovascular accounts for most of the mortality in patients with type 2 diabetes mellitus. We compared oxidative stress, thermal stability and oxygen releasing capacity of hemoglobin in patients with type 2 diabetes mellitus and diabetes-associated cardiovascular disease. METHODS: The study was performed on 38 control subjects, 31 diabetics, 36 diabetics with cardiovascular complications, and 33 non-diabetic cardiovascular subjects. RESULTS: Enhanced oxidative stress was shown by an increased protein carbonyl content observed both in plasma and in hemolysate of the diseased samples in type 2 diabetes and diabetes-associated cardiovascular diseased patients. Altered levels of cytoprotective enzymes were shown by decreased catalase activity, increased glutathione reductase activity and unaltered superoxide dismutase activity. Peroxidative activity of diseased hemoglobin was much higher compared to healthy controls indicating possible structural changes in pathologic hemoglobin molecule as a result of disease induced oxidative stress. This result is in good agreement with the observation that thermal stability of pathologic hemoglobin was also found to be less compared to control subjects. Enhanced oxygen releasing capacity of tetrameric oxyhemoglobin was monitored in presence of the drug Trifluoperazine in pathologic red blood cells, maximum increment being noticed in diabetic cardiovascular diseased subjects. CONCLUSION: Hyperglycemia-induced oxidative stress was responsible to affect the thermal stability and oxygen releasing capacity of hemoglobin and the effect is more pronounced in diabetes-associated cardiovascular disease.
机译:背景:大血管疾病,尤其是心血管疾病,是2型糖尿病患者死亡率的绝大部分。我们比较了2型糖尿病和糖尿病相关性心血管疾病患者的血红蛋白的氧化应激,热稳定性和氧释放能力。方法:该研究针对38名对照受试者,31名糖尿病患者,36名患有心血管并发症的糖尿病患者和33名非糖尿病心血管患者进行。结果:2型糖尿病和糖尿病相关的心血管疾病患者血浆和溶血产物中蛋白质羰基含量的增加表明氧化应激增强。过氧化氢酶活性的降低,谷胱甘肽还原酶活性的增加和超氧化物歧化酶活性的改变表明了细胞保护酶水平的改变。与健康对照组相比,患病血红蛋白的过氧化活性高得多,表明由于疾病引起的氧化应激,病理性血红蛋白分子可能发生结构变化。该结果与观察到的病理性血红蛋白的热稳定性相比于对照受试者低的观察结果非常一致。在病理性红细胞中存在药物Trifluoperazine的情况下,监测了四聚体氧合血红蛋白的增强的氧释放能力,在糖尿病性心血管疾病患者中观察到最大增量。结论:高血糖引起的氧化应激影响血红蛋白的热稳定性和氧释放能力,在糖尿病相关的心血管疾病中这种作用更为明显。

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