Rescue in vitro fertilization method for legacy stock of frozen mouse sperm.
Sperm cryopreservation has been widely adopted for maintenance of the genetically engineered mouse (GEM). The cryopreserved sperm are being exchanged among many institutes worldwide. However, the recipients are not always able to obtain high fertilization rates with the frozen sperm shipped from senders. In this study, we cryopreserved mouse sperm via various methods and performed in vitro fertilization (IVF) in which the combination of methyl-beta-cyclodextrin for sperm preincubation and reduced glutathione for insemination was used (the MBCD-GSH IVF). In addition, frozen sperm sent from the Jackson Laboratory (USA) were thawed and used for IVF in the same manner. The fertilization rates of both the sperm cryopreserved via the methods applied in some countries and the cryopreserved GEM sperm improved when used with the MBCD-GSH IVF method. Therefore, we strongly believe that the MBCD-GSH IVF method brings about relatively high fertilization rates with any strain of frozen mouse sperm.
Division of Reproductive Engineering, Center for Animal Resources and Development (CARD), Kumamoto 860-0811, Japan.
Naomi
N
Nakagata
Toru
T
Takeo
Kiyoko
K
Fukumoto
Yukie
Y
Haruguchi
Tomoko
T
Kondo
Yumi
Y
Takeshita
Yuko
Y
Nakamuta
Tomoko
T
Umeno
Shuuji
S
Tsuchiyama
D000818:Animals; D030801:Animals, Genetically Modified; D015925:Cryopreservation / Q000379:methods*; D003451:Cryoprotective Agents / Q000494:pharmacology*; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods; D005978:Glutathione / Q000494:pharmacology*; D008297:Male; D008810:Mice, Inbred C57BL; D012662:Semen Preservation / Q000379:methods*; D047392:beta-Cyclodextrins / Q000494:pharmacology*
D003451:Cryoprotective Agents; D047392:beta-Cyclodextrins; C108732:methyl-beta-cyclodextrin; D005978:Glutathione