Glycine increases preimplantation development of mouse oocytes following vitrification at the germinal vesicle stage

Ice-free cryopreservation, referred to as vitrification, is receiving increased attention in the human and animal assisted reproduction. However, it introduces the detrimental osmotic stress by adding and removing high contents of cryoprotectants. In this study, we evaluated the effects of normalizi...

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Bibliographic Details
Published in:Scientific reports 2016-11, Vol.6 (1), p.37262-37262, Article 37262
Main Authors: Cao, Xin-Yan, Rose, Jack, Wang, Shi-Yong, Liu, Yong, Zhao, Meng, Xing, Ming-Jie, Chang, Tong, Xu, Baozeng
Format: Article
Language:English
Subjects:
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Apoptosis
Cell size
Cryopreservation
Cryoprotectors
Fertilization
Glycine
Humanities and Social Sciences
Ice
Mitochondria
multidisciplinary
Oocytes
Osmosis
Osmotic stress
Science
Supplements
Thawing
Vitrification
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Summary:Ice-free cryopreservation, referred to as vitrification, is receiving increased attention in the human and animal assisted reproduction. However, it introduces the detrimental osmotic stress by adding and removing high contents of cryoprotectants. In this study, we evaluated the effects of normalizing cell volume regulation by adding glycine, an organic osmolyte, during vitrification of mouse germinal vesicle stage oocyte and/or subsequent maturation on its development. The data showed that glycine supplementation in either vitrification/thawing or maturation medium significantly improved the cytoplasmic maturation of MII oocytes manifested by spindle assembly, chromosomal alignment, mitochondrial distribution, euploidy rate, and blastocyst development following fertilization in vitro , compared to the control without glycine treatment. Furthermore, glycine addition during both vitrification/thawing and maturation further enhanced the oocyte quality demonstrated by various markers, including ATP contents and embryo development. Lastly, the effect of anti-apoptosis was also observed when glycine was added during vitrification. Our result suggests that reducing osmotic stress induced by vitrification could improve the development of vitrified mouse oocyte.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep37262