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首页> 外文期刊>Cell biology international. >Evidence that erythrocytes are highly susceptible to exercise oxidative stress: FT-IR spectrometric studies at the molecular level.
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Evidence that erythrocytes are highly susceptible to exercise oxidative stress: FT-IR spectrometric studies at the molecular level.

机译:红细胞高度易受运动性氧化应激的证据:分子水平的FT-IR光谱研究。

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We tested the hypothesis that usual exercise oxidative stress strongly affects erythrocytes viability. A 120-min physical exercise with progressive intensity was used as a model of oxidative stress. FT-IR spectrometry was used to determine structural changes in erythrocyte contents (phospholipids, proteins, lactate, and glucose) from blood samples taken every 20 min. Carbonyl formation from amino acid residues (P = 0.03) and hemoglobin unfolding (P = 0.01) could be identified as main protein denaturation markers during oxidative stress. Higher unsaturation level (P = 0.001) in phospholipids fatty acyl chains were also observed while VO(2) increased (P < 0.05). The increase in lactacidosis affected primarily hemoglobin unfolding (P = 0.02). Finally, two distinct cellular events occurred during oxidative stress: 1 - phospholipids peroxidation correlated to VO(2), but lactacidosis and hemoconcentration remained secondary factors; 2 - hemoglobin denaturation was mainly observed through unfolding and carbonylation, and lactacidosis and hemoconcentration were important contributing factors.
机译:我们检验了通常的运动氧化应激强烈影响红细胞生存能力的假设。以渐进强度进行120分钟的体育锻炼作为氧化应激的模型。 FT-IR光谱法用于确定每20分钟采集的血样中红细胞含量(磷脂,蛋白质,乳酸和葡萄糖)的结构变化。氨基酸残基的羰基形成(P = 0.03)和血红蛋白解折叠(P = 0.01)可以被确定为氧化应激期间主要的蛋白质变性标记。还观察到磷脂的脂肪酰基链中较高的不饱和度水平(P = 0.001),而VO(2)增加(P <0.05)。乳酸中毒的增加主要影响血红蛋白的展开(P = 0.02)。最后,在氧化应激过程中发生了两个不同的细胞事件:1-磷脂过氧化与VO(2)相关,但是乳酸中毒和血液浓缩仍然是次要因素。 2-血红蛋白的变性主要通过解折叠和羰基化来观察,而乳酸中毒和血液浓缩是重要的促成因素。

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