摘要
目的 :观察Ca2 + 载体A2 31 87对受精失败人类成熟卵母细胞的补救激活及激活后的胚胎发育情况。方法 :收集常规体外受精 (IVF)及卵浆内单精子注射 (ICSI)后 2 4h仍无受精征象的成熟卵母细胞作为研究对象 ,5μmol/LCa2 + 载体A2 31 87中处理 5min,观察第二极体排出及原核形成情况 ,激活后卵母细胞在体外继续培养 2d。结果 :IVF组及ICSI组卵母细胞激活率分别为 64 9% (2 4 / 37)和 73 2 % (30 / 4 1 )。ICSI组受精失败卵母细胞激活后主要表现为二极体二原核 (2PB +2PN) (80 % ,2 4 / 30 ) ,而IVF组仅有 2 0 %的被激活卵母细胞表现为 2PB +2PN ,两组间差异具极显著 (P <0 0 1 )。 31个 2PN卵母细胞继续培养 ,2 5个发生分裂 ,1 1个发育到 2 - 4细胞 ,8个发育到 4 - 8细胞 ,6个发育到 8-细胞以上阶段。结论 :Ca2 + 载体A2 31 87能够有效地激活ICSI后受精失败卵母细胞恢复受精并继续发育成胚胎。
AIM: To explore the activation effect of calcium ionophore A23187 on unfertilized human mature oocytes after conventional in-vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI). METHODS: Thirty-seven unfertilized mature oocytes from IVF and 41 after ICSI were included in our experiment. They were incubated in 5 μmol/L calcium ionophore A23187 for 5 minutes. Second polar body extrusion and pronuclear formation were recorded 12-16 hours later. The activated oocytes were cultured for another 2 days in vitro. RESULTS: Activation rate of unfertilized oocytes from conventional IVF and ICSI were 64.9%(24/37)and 73.2%(30/41), respectively. Among 41 unfertilized oocytes after ICSI treated with A23187, 30 were activated and 24 had 2 polar body (PB) and 2 pronuclear (PN). But for the unfertilized oocytes from conventional IVF only 20% activated oocytes had 2 PN and 2 PB. The percentage difference of oocytes containing 2 PB and 2 PN between the two groups was significant ( P< 0.01). When all 31 activated oocytes containing 2 pronuclei were cultured in IVF-20 for additional 48 hours, 25 cleaved. Among them 11 developed to 2-4 cell stage, 8 to 4-8 cell stage and 6 to 8-cell stage. CONCLUSION: Calcium ionophore A23187 was effective in activating unfertilized human oocytes after IVF or ICSI. The activated oocytes had further developmental potential.
出处
《中国病理生理杂志》
CAS
CSCD
北大核心
2003年第2期260-262,共3页
Chinese Journal of Pathophysiology
基金
广东省自然科学基金资助项目 (No.2 0 0 0 1 339)
