Effects of polyvinyl alcohol on vitrification of mature and immature bovine oocytes

Main Article Content

Chatree Chumnandee
Sivilai Sirimungkararat
Weerasak Saksirirat
Karintorn Srijankam

Abstract

The objective of this study was to evaluate the putative effects of low molecular weight (9000-10000 Da) polyvinyl alcohol (PVA) as an ice blocking agent on vitrification of mature (metaphase II stage; MII) and immature (germinal vesicle stage; GV) bovine oocytes. In experiment 1, the effect of two concentrations of PVA (0.1% and 1%) on the viability of vitrified-warmed MII oocytes was determined using fluorescein diacetate staining. The results showed that the viability of vitrified-warmed MII oocytes was not significantly different among the various groups (vitrified control; 65.6%, +0.1 %PVA; 83.3%, and +1.0 %PVA; 73.7%). In experiment 2, the effect of 0.1% PVA on fertilization and developmental competence of vitrified-warmed MII oocytes was determined. The blastocyst development of oocytes in 0.1%PVA group was significantly higher (p£0.05) than that of the vitrified control group (10.1% and 3%, respectively), but significantly lower (p£0.05) than that of the fresh control group (59.1%). In experiment 3, the maturation rate of vitrified-warmed GV oocytes was determined. The percentages of vitrified-warmed GV oocytes reaching the MII stage were not different among three maturation periods (22h IVM; 33.3%, 24 h IVM; 54.5%, and 26 h IVM; 31.3%). In experiment 4, the effect of 0.1% PVA on fertilization and developmental competence of vitrified-warmed GV oocytes was determined. The proportions of blastocysts were not different between the vitrified control and 0.1% PVA groups (1.5% and 0.8%, respectively). In conclusion, the results showed that a low molecular weight PVA at a concentration of 0.1% improved the vitrification of mature bovine oocytes, but lacked a positive effect with immature oocytes.

Article Details

How to Cite
Chumnandee, C., Sirimungkararat, S., Saksirirat, W., & Srijankam, K. (2017). Effects of polyvinyl alcohol on vitrification of mature and immature bovine oocytes. Asia-Pacific Journal of Science and Technology, 22(4), APST–22. https://doi.org/10.14456/apst.2017.33
Section
Research Articles

References

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