Gupta MK, Uhm SJ, Lee HT. Effect of vitrification and beta-mercaptoethanol on reactive oxygen species activity and in vitro development of oocytes vitrified before or after in vitro fertilization.
Fertil Steril 2010;
93:2602-7. [PMID:
20303480 DOI:
10.1016/j.fertnstert.2010.01.043]
[Citation(s) in RCA: 122] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2009] [Revised: 01/13/2010] [Accepted: 01/14/2010] [Indexed: 11/16/2022]
Abstract
OBJECTIVE
To investigate the effect of vitrification and beta-mercaptoethanol (beta-ME) on reactive oxygen species (ROS) activity and in vitro development of oocytes vitrified before or after in vitro fertilization (IVF).
DESIGN
Randomized prospective study.
SETTING
University-based assisted reproductive technology laboratory. ANIMALS(S): Abattoir-derived porcine ovaries.
INTERVENTIONS(S)
Oocytes were vitrified either before or 4 hours after the end of IVF by solid surface vitrification (SSV) without centrifugation and/or delipation procedure. beta-ME was used to inhibit ROS activity.
MAIN OUTCOME MEASURES(S)
Viability was evaluated by membrane integrity and esterase enzyme activity using fluorescein diacetate staining while ROS activity was assessed by 2',7'-dichlorofluorescein assay.
RESULT(S)
Vitrification increased the ROS activity and decreased the viability and in vitro development of vitrified oocytes. Addition of beta-ME to vitrification and culture medium partially annihilated the ROS activity but did not improve the viability of vitrified-warmed oocytes. Furthermore, beta-ME had no effect on improving the fertilization ability of oocytes vitrified at metaphase II stage but significantly increased their ability to cleave. beta-ME also increased the rate of cleavage and blastocyst formation ability of oocytes vitrified 4 hours after the end IVF.
CONCLUSION(S)
Vitrification increases ROS activity in oocytes that can be partially annihilated by beta-ME to obtain enhanced embryonic development.
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