小鼠受精卵显微操作方法的改进

Improvement on micro-manipulation of fertilized eggs of mice

目的 :改进小鼠受精卵显微操作方法 ,提高小鼠受精卵的存活率、假孕母鼠生产率及得仔率。方法 :以一定长度大小及浓度的 DNA片段为材料 ,分别进行常规及改进的显微操作后 ,统计分析受精卵存活率、假孕母鼠生产率及得仔率。 结果 :经改进后缩短操作时间的显微操作法与常规显微操作法相比 ,小鼠受精卵的存活率由 6 0 .3%提高至 79.5 %、假孕母鼠生产率由 35 .7%提高至 5 6 .8%、得仔率由 10 .1%提高至 14.1%,均有显著差别 (P<0 .0 1)。 结论 :改进的显微操作法可推广应用于常规的转基因小鼠制备。

Objective: To improve the micro-manipulation of mouse fertilized eggs,promoting its survival rate and productivity in pseudo-pregnant mice. Methods: DNA fragments of definite concentration and size were used for micro-manipulation with conventional and improved methods, then their survival rate of manupulated eggs and productivity of pseudo-pregnant mice were analyzed and compared. Results: With improved methods, the survival rate of eggs increased from 60.3% to 79.5%, the productivity of pseudo-pregnant mice and offspring increased from 35.7% to 56.8% and 10.1% to 14.1% respectively. Conclusion: The improved methods of micro-manipulation can be used in transgenic mouse production.