牛血清白蛋白对小鼠原核期胚胎玻璃化冷冻的影响

以小鼠原核期胚胎为对象,以胚胎的存活率、卵裂率、囊胚率以及囊胚细胞数作为检测指标,在M2液的基础上添加8种浓度(0,2,4,8,16,32,64,96mg/mL)牛血清白蛋白(BSA)配置防冻液,探讨防冻液和玻璃化冷冻后对胚胎发育的影响。BSA防冻液对胚胎发育影响的实验结果表明,8个浓度组间以及与对照组间胚胎的卵裂率、囊胚率以及囊胚细胞数无显著差异(P>0.05),说明在防冻液中加入一定浓度的BSA对小鼠胚胎无毒性作用。防冻液经玻璃化冷冻后对胚胎发育影响的实验表明,8个浓度组间冷冻胚胎复苏后的存活率、卵裂率、囊胚率及囊胚细胞数无显著差异(P>0.05)。表明BSA在这种防冻液中没有明显的保护作用。从经济、实用、生物安全角度考虑,不支持在玻璃化防冻液中添加BSA。

Effect of Bovine Serum Albumin on Vitrification of Pronuclear-Stage Mouse Embryo

The cryoprotective effect and toxicity of Bovine Serum Albumin (BSA) at 8 concentrations (0, 2, 4, 8, 16, 32, 64, 96 mg/mL, respectively) supplemented in cryoprotectant solutions on mouse pronuclear-stage embryo vitrification were studied. Survival rate, cleavage rate, blastocyst rate and mean cell numbers of blastocyst of vitrified embryos were used as criterion to evaluate the effect of BSA on the post-thawed embryos development. The results showed that no statistical differences of survival rate, cleavage rate, blastocyst rate and mean cell numbers of blastocyst of vitrified groups both in the toxic effect assay (P>0.05) and the vitrification assay (P>0.05). The results indicated that BSA in this cryoprotectant solutions has no effect on the viability of pronuclear-stage embryos. Economical, practical and biosecure considerations do not support the use of BSA in vitrificationsolutions.