【摘要】 目的：探讨玻璃化冷冻方法中冷冻保护剂及制冷速度对家兔第二次减数分裂中期卵母细胞纺锤体的影响。方法：以冷冻环为载体，单用乙二醇(ethylene glycol，EG)或乙二醇与二甲基亚砜(dimethyl sulphoxide，DMSO)联合作冷冻保护剂，用直投液氮或使用玻璃化冷冻仪高速制冷冷冻家兔卵母细胞；解冻2h 后固定并免疫荧光法染色纺锤丝及染色体；用共聚焦扫描显微镜观察纺锤体形态。结果：在单用 EG 以及 EG 和 DMSO 联合直投液氮的方案中，纺锤体损伤较严重，但在 EG 和 DMSO 联合应用并采用玻璃化冷冻仪提高制冷速度的方案中，纺锤体形态正常的比例与对照组相似 结论：玻璃化冷冻方法中采用冷冻保护剂联合及采用玻璃化冷冻仪高速制冷对保持解冻后家兔卵母细胞纺锤体形态效果最好。更多还原

【Abstract】 SUMMARY Objective:To investigate the influence of cryoprotectants and cooling rates in vitrificationmethod on the spindles of rabbit M Ⅱ oocytes.Methods:Rabbit oocytes were verified by using cryoloopwith ethylene glycol(EG)singly or EG combined with dimethyl sulphoxide(DMSO)as cryoprotectants,and cooled by taking oocytes directly into liquid nitrogen or by vitrification machine.After frozen rabbit o-ocytes thawed,the microtubulin and chromosome of the spindles were fixation and stained by immunofluo-rescent method.Confocal microscope was used to reveal spindle configuration.Results:In the two proto-cols of single EG used and EG combined with DMSO,the spindles were severely injured.But in protocolof EG combined with DMSO and at ultra-rapid cooling rate,the normal configuration of spindle rate ofthawed rabbit oobytes was similar to that of the control group.Conclusion:The protocol of EG combinedwith DMSO as cryoprotectants and with extremely high cooling rate by vitrification machine can producethe best effect on conservation of spindle configuration in vitrification of rabbit oocytes.更多还原