氯化钴预处理小鼠海马组织缺氧诱导因子-1α表达时间的依赖性研究

Effect of CoCl2 on induction hypoxia inducible factor-1α in mice hippocampus depend on time delay

目的 观测小鼠注射氯化钴（ CoC12）后不同时间点小鼠海马组织中缺氧诱导因子-1（HIF1α）蛋白质的表达.方法 小鼠腹腔注射CoCl2后不同的时间点（0、1h、2h、3h、4h、5h和6h）取海马组织,应用Western Blot、免疫荧光激光共聚焦显微镜等技术,检测小鼠海马组织内HIF-1α的蛋白表达变化.结果实验发现海马组织内HIF-1α蛋白表达量随时间的变化发生变化,其各个时间点HIF-1α蛋白相对丰度值分别是0.135±0.01,0.572±0.01,0.595±0.03,1.09±0.03,1.30±0.04,1.275±0.03,0.947±0.03,4h时达到相对峰值,5～6h后其表达开始下降；HIF-1 αFITC免疫荧光强度值分别为13.33±3.42,30.95±7.86,46.50±9.65,61.50±10.02,88.30±15.69,71.39±11.28,67.41±10.78,荧光强度同样在4h时达到高峰,在5～6h时间段内逐渐减少.结论 CoCl2预处理小鼠海马组织中HIF-1α表达具有时间依赖性.

Objective To observe the effects of CoC12 treatment on the expression of Hypoxia-inducible factor-1（HIF-1α） in mice hippocampus at different time point.Methods Balb/c mice were injected with CoCl2 and the change of HIF-1 α was detected by western blot and immunofluorescence and confocal laser scanning microscope at different time point（0h,1h,2h,3h,4h,5h and 6h） after injection.Results The relative protein level of HIF-1α was 0.135 ±0.01,0.572 ±0.01,0.595 ±0.03,1.09 ±0.03,1.30 ＋0.04,1.275 ±0.03,0.947 ±0.03respectively at different time point after the injection.The HIF-1α protein level reached its peak value at 4 h and decreased at 5h and 6h.Fluorescence intensity of HIF-1α was 13.33 ± 3.42,30.95 ± 7.86,46.50 ± 9.65,61.50± 10.02,88.30 ＋ 15.69,71.39 ± 11.28,67.41 ± 10.78 respectively at different time point after the injection.The HIF-1α fluorescence intensity also reached its peak value at 4 h and decreased at 5h and 6h.Conclusion Time dependent HIF-1α accumulation was in close correlation with the CoCl2.