Author： Zhou Xiaomei Yin Mingru Jiang Weihua Jiang Manxi Li Shangang Li Heping Chen Xuejin
Publisher： Springer Publishing Company
ISSN： 1058-0468
Source： Journal of Assisted Reproduction and Genetics, Vol.30, Iss.12, 2013-12, pp. : 1605-1610
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
We investigated the effect of electrical stimulation on rabbit oocyte activation using intracytoplasmic sperm injection (ICSI) to determine whether viable offspring can be produced from deceased rabbit sperm using ICSI.Sperm were collected from a heterozygote GFP male rabbit 5 h after sacrifice and cryopreserved in liquid nitrogen. Mature oocytes were fertilized using ICSI. A series of electrical pulse procedures were used to activate oocytes before and/or after ICSI. Following ICSI, zygotes were cultured in B2 medium for 4 days or transferred into the oviducts of recipient rabbits at the 2- or 4-cell stage.The blastocyst formation rate was significantly greater in oocytes that received one or two pulses prior to ICSI compared to controls and other electrically stimulated groups. In the single pulse before ICSI group, 23 % of the blastocysts expressed GFP, which was significantly greater than all other groups. However, those that received treatment before and after, or just following ICSI, showed a significant decrease in embryo survival. Finally, embryos from the single pulse before ICSI group were transferred into recipient female rabbits and a full-term kit was successfully delivered.One pulse of electrical stimulation prior to sperm injection was an effective method to activate rabbit oocytes for fertilization. Sperm collected from a deceased rabbit is able to produce viable embryos through ISCI that are capable of normal fetal and kit development.
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