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- W2135339964 abstract "In rats, the success of in vitro fertilization (IVF) was reported 40 years ago. Although it has been demonstrated in papers that these IVF oocytes using sperm freshly collected from cauda epididymides can be developed to term via embryo transfer, successful IVF with cryopreserved rat sperm has never been reported to date. Here, we report establishment of a successful IVF system using frozen/thawed rat spermatozoa. Our data showed that intracellular cAMP and free cholesterol levels in frozen/thawed rat sperm were maintained low, suppressing capacitation-associated tyrosine phosphorylation. The treatment of methyl-beta-cyclodextrin improved removal of free cholesterol from the membrane in frozen/thawed sperm but not induction of capacitation-associated tyrosine phosphorylation in the sperm. Treatment with a phosphodiesterase inhibitor, 3-isobutyl-1-methyl-xanthin (IBMX), dramatically increased cAMP and tyrosine phosphorylation levels in frozen/thawed rat sperm. When the IBMX-treated frozen/thawed sperm were used for IVF, the proportions of pronuclear formation and blastocyst formation were significantly higher than those of frozen/thawed sperm treated without IBMX (P < 0.05). The embryos were developed to term at a high success rate equivalent to the rate obtained with IVF using fresh sperm. Thus, we established for the first time a successful IVF system in rats using cryopreserved spermatozoa." @default.
- W2135339964 created "2016-06-24" @default.
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- W2135339964 date "2009-03-01" @default.
- W2135339964 modified "2023-10-18" @default.
- W2135339964 title "Generation of Live Rats Produced by In Vitro Fertilization Using Cryopreserved Spermatozoa1" @default.
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- W2135339964 doi "https://doi.org/10.1095/biolreprod.108.072918" @default.
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