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新生大鼠缺氧缺血性脑损伤HIF-1α表达与去铁胺的作用机制

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摘要 目的研究缺氧缺血性脑损伤(hypoxia-ischemia brain damage,HIBD)时低氧诱导因子-1α(HIF-1α)表达与去铁胺(deferoxamine,DFO)的作用。方法将120只7日龄Wistar大鼠随机分为3组。假手术组(n=8)、HIBD组及DFO组,后两组根据处死时间分为3h、6h、12h、24h、48h、3d、7d亚组(每组8只)。应用免疫组织化学法检测HIF-1α、Caspase-3的表达,应用原位末端标记法(TUNEL)检测凋亡细胞。结果 HIBD组HIF-1α,3h轻微增高,12h达高峰,后逐渐降低,其各时间点表达高于假手术组(P<0.05);DFO组则6h达高峰,后逐渐降低,与HIBD组比较各时间点HIF-1α表达均增多(P<0.05)。HIBD组脑组织Caspase-3,3h开始表达,6h明显升高,12h和24h仍在较高水平,7d后降低,且各时间点表达高于假手术组(P<0.05);DFO组各时间点Caspcse-3表达低于HIBD组(P<0.05)。结论在新生鼠HIBD后,DFO可通过升高HIF-1α的表达而发挥抗凋亡作用,发挥其脑保护作用。
出处 《中西医结合心脑血管病杂志》 2012年第7期846-848,共3页 Chinese Journal of Integrative Medicine on Cardio-Cerebrovascular Disease
基金 山西省回国留学人员科技基金资助项目(No.2011-095) 山西省卫生厅科技攻关基金项目(No.2011-018)
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