Abstract
Purpose
Reducing the ischemic damage from free radicals that is inflicted on ovarian tissue is critical for successful ovarian tissue transplantation. Polyethylene glycol-superoxide dismutase (PEG-SOD) is mimetic of superoxide dismutase (SOD) and powerful free radical scavenger acts by reducing superoxide anions. The objective of study was to evaluate effects of PEG-SOD on mouse ovarian tissues in in vitro culture and in autotransplantation.
Methods
Ovaries were collected and randomly divided into four groups that received different doses of PEG-SOD. To assess effects of PEG-SOD on in vitro cultures, four different doses of PEG-SOD were applied to in vitro culture media during in vitro culturing following ovarian tissue vitrification and warming. To evaluate effects of PEG-SOD on ovarian tissue transplantation, four different doses of PEG-SOD were applied for 2, 7, and 21 days to mice following vitrified-warmed mouse ovarian tissue autotransplantation.
Results
The percentage of primordial follicles was maintained at the highest dose of PEG-SOD for 2 h in vitro, and there was a significant decrease in the percentage of apoptotic follicles at 2 h, but not at later time points. The highest dose of PEG-SOD also maintained primordial, primary, and secondary follicles 2 days post-transplantation, but only primordial follicles were maintained up to 21 days after transplantation.
Conclusions
PEG-SOD is protective mainly toward primordial follicles only for a short interval in vitro, presumably via antioxidant effects. PEG-SOD may be a promising additive for preserving ovarian tissue integrity, at least for primordial follicles, up to 21 days post-transplantation.
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Acknowledgement
This study was supported by a grant of the Korea Healthcare Technology R&D Project, Ministry of Health & Welfare, Republic of Korea (HI12C0055).
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Capsule In an animal model system, PEG-SOD is shown to be a promising free-radical scavenging additive for preserving ovarian tissue integrity destined for transplantation.
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Kim, E.J., Lee, H.J., Lee, J. et al. The beneficial effects of polyethylene glycol-superoxide dismutase on ovarian tissue culture and transplantation. J Assist Reprod Genet 32, 1561–1569 (2015). https://doi.org/10.1007/s10815-015-0537-8
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DOI: https://doi.org/10.1007/s10815-015-0537-8