Abstract:
:The rapid expansion of mutant mouse colonies for biomedical research has resulted in lack of space at laboratory animal facilities and increasing risks of losing precious lines. These challenges require cheap and effective methods in addition to freezing embryos and sperm to archive the expanding mutant mouse lines. Cryopreservation of mouse ovarian tissue has been reported, but the application in the diverse mutant lines and genetic backgrounds has not yet been studied. In this study, juvenile ovaries (10-day-old) collected from genetically modified mouse lines were cryopreserved using high concentrations of cryoprotectants (dimethyl sulfoxide (Me(2)SO) and ethylene glycol (EG)) and instrumented ultra-rapid freezing. The validation of the frozen ovary batches was assessed by orthotopically transplanting a thawed ovary into a nearly completely ovariectomized mature female (congenic with the ovary donor). After 2 weeks of recovery, the ovary recipient was continuously paired with a male (congenic with the ovary donor) to evaluate the fertility of the recipient and delivered offspring were genotyped to evaluate the continued functionality of the grafted ovary. The recipient females delivered genetically modified offspring starting 6 weeks after ovary transplantation and lasting up to 6 months. The presented cryopreservation and transplantation protocols enabled retrieval of the genetic modification in 20 (from 22) genetically modified mutant mouse models on a C57BL/6 (17), FVB (2), or BALB/c (1) background. The thawed ovaries functioned after successful orthotopic allotransplantation to congenic wild-type recipients and produced mutant offspring, which allowed recreation of the desired genotype as a heterozygote on the proper genetic background. The results indicate that cryopreservation of mouse ovaries is a promising method to preserve genetic modification of the increasing number of mutant mouse models and can be used as a model for ovary cryopreservation using a variety of mouse mutants.
journal_name
Cryobiologyjournal_title
Cryobiologyauthors
Huang KY,de Groot SA,Woelders H,van der Horst GT,Themmen AP,Colenbrander B,van Vlissingen JMdoi
10.1016/j.cryobiol.2009.10.003subject
Has Abstractpub_date
2010-04-01 00:00:00pages
129-37issue
2eissn
0011-2240issn
1090-2392pii
S0011-2240(09)00141-2journal_volume
60pub_type
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