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首页> 外文期刊>Neurochemistry International: The International Journal for the Rapid Publication of Critical Reviews, Preliminary and Original Research Communications in Neurochemistry >Neuroprotection mediated by remote preconditioning is associated with a decrease in systemic oxidative stress and changes in brain and blood glutamate concentration
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Neuroprotection mediated by remote preconditioning is associated with a decrease in systemic oxidative stress and changes in brain and blood glutamate concentration

机译:通过远程预处理介导的神经保护导致系统性氧化应激和脑和血液谷氨酸浓度的变化有关

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摘要

It has been shown that ischemia of remote organs can generate resistance to ischemic conditions within sensitive brain tissues. However, only limited information about its mechanism is available. In the present paper, we used hind-limb ischemia by tourniquet to generate early remote ischemic tolerance in rats. The main objective was to investigate the role of glutamate in the process of neuroprotection and discover parameters that are affected in the blood of ischemia-affected animals. Our results showed that pretreatment with a hind-limb tourniquet caused a decrease in neurodegeneration by about 30%. However, we did not observe neurological deficit recovery. When compared to ischemia, glutamate concentration decreased in all observed brain regions (cortex, CA1 and dentate gyrus of hippocampus), regardless of their sensitivity to blood restrictions. In contrast to this, the blood levels raised significantly from 26% to 29% during the first four days of postischemic reperfusion. Pretreatment of animals reduced systemic oxidative stress as represented by lymphocytic DNA damage by about 80%, while changes in blood antioxidant enzymes (catalase, superoxide dismutase) were not detected.
机译:已经表明,远程器官的缺血可以在敏感脑组织内产生对缺血性条件的抵抗力。但是,只有有关其机制的有限信息可用。在本文中,我们用止血带使用后肢缺血,在大鼠中产生早期远程缺血性耐受性。主要目的是探讨谷氨酸在神经保护过程中的作用,并发现受缺血影响的动物血液中受影响的参数。我们的研究结果表明,用后肢止血带预处理导致神经变性降低约30%。但是,我们没有观察到神经系统缺陷恢复。与缺血相比,谷氨酸浓度在所有观察到的脑区(皮质,CA1和海马的牙齿齿状齿轮)中减少,无论它们对血液限制的敏感性。与此相反,在发布后,血液水平明显从26%升至29%,在发布后的前四天灌注。动物的预处理降低了通过淋巴细胞DNA损伤所代表的全身氧化应激,而未检测到血抗氧化酶(过氧化氢酶,超氧化物歧化酶)的变化。

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