Mukesh Kumar Gupta1, Sang Jun Uhm, Hoon Taek Lee. 1. Department of Animal Biotechnology, Bio-Organ Research Center/Animal Resources Research Center, Konkuk University, Seoul, South Korea.
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. Copyright 2010 American Society for Reproductive Medicine. Published by Elsevier Inc. All rights reserved.
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. Copyright 2010 American Society for Reproductive Medicine. Published by Elsevier Inc. All rights reserved.
Authors: Clementina Cantatore; Jenny S George; Raffaella Depalo; Giuseppe D'Amato; Molly Moravek; Gary D Smith Journal: J Assist Reprod Genet Date: 2021-05-22 Impact factor: 3.357