RRC ID 5290
Author Endoh K, Mochida K, Ogonuki N, Ohkawa M, Shinmen A, Ito M, Kashiwazaki N, Ogura A.
Title The developmental ability of vitrified oocytes from different mouse strains assessed by parthenogenetic activation and intracytoplasmic sperm injection.
Journal J Reprod Dev
Abstract Assessment of the developmental ability of oocytes following freezing and thawing is an important step for optimizing oocyte cryopreservation techniques. However, the in vitro fertilization of frozen-thawed mouse oocytes is often inefficient because of incomplete capacitation of spermatozoa in the absence of surrounding cumulus cells. This study was undertaken to determine whether the oocyte cryopreservation efficiency of different strains of mice could be assessed from the development of oocytes following parthenogenetic activation and intracytoplasmic sperm injection (ICSI). Oocytes were collected from hybrid (C57BL/6 x DBA/2) F1 or inbred (C57BL/6J, C3H/HeN, DBA/2J and BALB/cA) strains and were vitrified in a solution containing ethylene glycol, DMSO, Ficoll and sucrose. In the first series of experiments, oocytes were activated parthenogenetically by Sr(2+) treatment after warming. The oocytes from the inbred strains, but not those of the F1 hybrid, were diploidized by cytochalasin treatment to obtain a sufficient number of blastocysts. In all strains tested, parthenogenetic embryos derived from vitrified oocytes developed into blastocysts at rates between 23 and 68%. In the second series of experiments, vitrified oocytes from each strain were injected with homologous spermatozoa after warming. Normal offspring were obtained from all strains at rates between 5 and 26% per embryo transferred. Thus, the feasibility of oocyte cryopreservation protocols can be assessed easily by in vitro development of parthenogenetic embryos or by in vivo development of ICSI embryos. Moreover, the oocytes of these four major inbred strains of mice can be cryopreserved safely for production of offspring.
Volume 53(6)
Pages 1199-206
Published 2007-12-1
DOI 10.1262/jrd.19058
PII JST.JSTAGE/jrd/19058
PMID 17827873
MeSH Animals Cryopreservation / methods* Embryo Culture Techniques Embryo Transfer Female Male Mice Mice, Inbred BALB C Mice, Inbred C3H Mice, Inbred C57BL Mice, Inbred DBA Oocytes / cytology* Oocytes / physiology Parthenogenesis / physiology* Pregnancy Species Specificity Sperm Injections, Intracytoplasmic*
IF 1.735
Times Cited 18