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The characteristics of therapeutic effect of pinocembrin in transient global brain ischemia/reperfusion rats.

机译:Pinocembrin在短暂性全脑缺血/再灌注大鼠中的治疗作用特征。

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AIMS: The therapeutic effect of pinocembrin, together with the therapeutic time window, in the transient global cerebral ischemia/reperfusion (I/R) rats was investigated. MAIN METHODS: Adult male Sprague-Dawley rats were subjected to global cerebral ischemia for 20 min by four-vessel occlusion. Pinocembrin (1 and 5mg/kg) was administrated intravenously 30 min before ischemia and 30 min, 2h, 6h after reperfusion, respectively. Neurological scores, brain edema and histological examination by Nissl staining were employed to assess the neuronal injury after ischemia and the neuroprotection by pinocembrin. The activities of superoxide dismutase (SOD), myeloperoxidase (MPO) and the content of malondialdehyde (MDA) in brain tissue were tested by colorimetric assays. Alterations of neurotransmitters were determined by a high performance liquid chromatography-electrochemical method. KEY FINDINGS: Pinocembrin significantly ameliorated neurological deficits and brain edema, and alleviated the degree of hippocampal neuronal loss at 24h after global cerebral I/R with a broad therapeutic time window. It was found that treatment with pinocembrin reduced the compensatory increase of SOD activity and decreased the MDA level and MPO activity in a dose-dependent manner. The metabolic balance between excitatory and inhibitory amino acids was modulated by pinocembrin treatment. SIGNIFICANCE: These findings suggest that pinocembrin provides neuroprotection against global cerebral ischemic injury with a wide therapeutic time window, which may be attributed to its antioxidative, antiinflammatory and antiexcitotoxic effects.
机译:目的:研究松球蛋白在短暂性全脑缺血/再灌注(I / R)大鼠中的治疗作用以及治疗时间窗。主要方法:成年雄性Sprague-Dawley大鼠通过四支血管闭塞进行全脑缺血20分钟。缺血前30min和再灌注后30min,2h,6h分别静脉注射Pinocembrin(1和5mg / kg)。神经学评分,脑水肿和尼氏染色组织学检查用于评估缺血后的神经元损伤和匹诺贝宁的神经保护作用。用比色法检测脑组织中的超氧化物歧化酶(SOD),髓过氧化物酶(MPO)和丙二醛(MDA)的活性。通过高效液相色谱-电化学方法确定神经递质的变化。主要发现:Pinocembrin可以显着改善神经功能缺损和脑水肿,并在整体脑I / R后24小时缓解海马神经元丢失的程度,并具有广阔的治疗时间范围。已发现用匹诺贝宁治疗以剂量依赖的方式降低了SOD活性的补偿性增加并降低了MDA水平和MPO活性。兴奋素和抑制性氨基酸之间的代谢平衡通过匹诺贝林处理来调节。意义:这些发现表明,匹诺贝林在广泛的治疗时间范围内提供了针对全脑缺血性损伤的神经保护作用,这可能归因于其抗氧化,抗炎和抗兴奋性毒性作用。

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