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应用图象处理系统对深低温停循环后神经细胞中钙颗粒定量分析 |
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李莉 邵新立 刘春新 汪艳
摘 要 目的 用草酸-焦锑酸钾细胞化学法显示深低温(18℃)停循环(DHCA)120分 钟后脑神经细胞内Ca2+的分布及超微结构改变。方法 利用图象处理系统同时对正常组、对照 组及保护组细胞内钙颗粒的体密度、数密度及颗粒大小等进行定量分析。结果 DHCA 120分钟 后脑神经细胞超微结构破坏严重,细胞内钙颗粒明显增加。但在DHCA期间应用1,6-二磷酸果 糖(FDP)脑保护液后,细胞内钙颗粒明显减少,超微结构破坏明显减轻。结论 在DHCA中, FDP可以有效地防止脑细胞的损伤。 关键词 细胞化学;神经生理学;钙/代谢;低温,人工;神经元/超微结构;二磷酸盐类/治疗 应用;狗 中图号 R318.03;R338.25
Quantitative Study on Ca2+ Granules in Neuron after Deep Hypothermic Circulatory Arrest by Using Image Processing System Li Li, Shao Xinli, Liu Chunxin, et al.Center of Analysis & Measurement, Wuhan University, Wuhan 430072 Abstract Objective The distribution of Ca2+ and ultrastructural changes in brain neuron after 120 minutes of deep hypothermic (18℃) circulatory arrest (DHCA) were determined by using K-pyroantimonate cytochemistry method. Methods The image processing system was employed to measure the volume density, count density as well as the size of the intracellular Ca2+ granules of the normal group, contrasting group and the protected group. Results The ultrastructure of brain neuron was damaged severely, and the intracellular Ca2+ granules increased significantly after 120 minutes of DHCA. When fructose-1,6-diphosphate (FDP) cerebro-protection liquid was employed during DHCA, the number of intracellular Ca2+ granules decreased significantly while the damage to the ultrastructure was reduced to a great degree. Conclusion FDP can efficiently protect brain neuron in DHCA. Key words cytochemistry;neurophysiology;calcium/metab;hypothermia,induced;neurons/ultrastruct; diphosphonates/ther use;dogs
钙内流及随后的细胞内钙超载,能导致一定类型的细胞死亡,这已被认为是缺血缺氧性细 胞损伤的一个基本原因。近年来临床与实验研究表明,在15℃ ~18℃的深低温下,脑组织可以 耐受缺血缺氧的时限为45~60分钟〔1〕,然而停循环时间太短,许多复杂畸形的修复手术又不 能顺利完成。本实验采用犬DHCA模型,结合焦锑酸钾组化技术,观察DHCA 120分钟后脑神经 细胞内Ca2+分布和超微结构改变,并应用图象处理系统对细胞内钙颗粒的数密度、体密度及颗 粒大小等参数进行[1] [2] 下一页 上一个医学论文: 共焦镜同时检测细胞内Ca2 和pH的变化 下一个医学论文: 不同剂量微波热凝后面神经变化的观察
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