冰冻干燥红细胞超微结构的分析

本研究的目的是探讨冰冻干燥红细胞在电镜下的形态变化。全血采自健康献血者 ,实验分为 3组。组 1:新鲜红细胞 ,4℃保存不超过 2 4小时 ;组 2 :红细胞中加入终浓度为 35 %的甘油 ,- 80℃保存 2 4小时 ;组 3:红细胞经过预处理 ,冰冻干燥 16小时。对解冻红细胞或水化重悬冰冻干燥的红细胞进行计数 ,电镜下观察 3组红细胞超微结构 ,并对电镜下红细胞平均直径、平均光密度及积分光密度进行图像分析。平均光密度及积分光密度代表细胞内血红蛋白的相对含量。结果表明 ,冰冻干燥后红细胞回收率为 5 3% ,红细胞具有圆盘状的结构。组 1红细胞平均直径(μm)、平均光密度及积分光密度分别为 4 .7± 0 .4 ,0 .14± 0 .0 2 ,1.5 8± 0 .4 6 ;组 2红细胞平均直径 (μm)、平均光密度及积分光密度分别为 4 .6± 0 .7,0 .14± 0 .0 2 ,2 .35± 0 .6 4 ;组 3红细胞平均直径 (μm)、平均光密度及积分光密度分别为 4 .4± 0 .4 ,0 .17± 0 .0 5和 2 .35± 0 .4 6。对电镜下红细胞平均直径、平均光密度及积分光密度数据进行统计学处理 ,三元方差分析的Wilks′Lambda检验显示 ,组 3与组 2之间无显著差异 ,组 3与组 1相比较差异显著。结论 :冰冻干燥红细胞具有相对完整的超微结构 ,平均直径及血红蛋白的含量与冰冻保存红细胞相

Analysis on Ultrastructure of Lyophilized Red Blood Cells

The objective of the present study was designed to evaluate lyophilized red blood cells of the ultrastructure. Blood was drawn from healthy adult. In group 1, sample was fresh blood; in group 2, sample was added 35% glycerine, stored at -80 degrees C for 24 hours; in group 3, red blood cells stored at 4 degrees C for 5 hours, then were lyophilized for 16 hour. The sample was resuspended for measurements of count and electron microscopy study. The result showed that lyophilized red blood cells possessed relative integrated structure, red blood cell recovery was 53%. The mean diameter, optical density and integral optical density of red blood cell were 4.7 +/- 0.4, 0.14 +/- 0.03 and 1.58 +/- 0.46 in group 1; 4.6 +/- 0.7, 0.14 +/- 0.02 and 2.35 +/- 0.64 in group 2; 4.4 +/- 0.4, 0.17 +/- 0.05 and 2.35 +/- 0.46 in group 3, respectively. There was no significant difference in lyophilized and frozen group, but there was significant difference in lyophilized group and normal group. In conclusion, human red blood cells could be successfully lyophilized and possess relative integrated structure. The mean diameter, optical density and integral optical density of lyophilized red blood cells were similar to that of cryopreservation red cells.