Evidence of metabolic activity during low-temperature ovarian tissue preservation in different media

Purpose Although ovarian tissue transportation has been validated for up to 24 h, there is no standard protocol to date. We aimed to elucidate how existing media currently used for ovarian tissue transportation affect ovarian tissue metabolism and cell viability. Methods Cow ovarian fragments were i...

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Published in:Journal of assisted reproduction and genetics 2020-10, Vol.37 (10), p.2477-2486
Main Authors: Vilela, Janice de M. V., Dolmans, Marie-Madeleine, Maruhashi, Emi, Blackman, Marine C. N. M., Sonveaux, Pierre, Miranda-Vilela, Ana Luisa, Amorim, Christiani A.
Format: Article
Language:English
Subjects:
Fertility Preservation
Gynecology
Human Genetics
Medicine
Medicine & Public Health
Reproductive Medicine
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Summary:Purpose Although ovarian tissue transportation has been validated for up to 24 h, there is no standard protocol to date. We aimed to elucidate how existing media currently used for ovarian tissue transportation affect ovarian tissue metabolism and cell viability. Methods Cow ovarian fragments were immersed in 0.9% NaCl solution, IVF medium, Leibovitz 15 medium (L-15), or PBS for 1, 4, or 24 h at 4 °C. Media were analyzed for pH, lactate dehydrogenase (LDH) activity, and glucose, pyruvate, and lactate concentrations, while apoptosis was assessed by TUNEL assays in fixed fragments. Viability rates were assessed by flow cytometry (FACS). Results There were lower pH levels in NaCl at all time points compared with other media. LDH activity increased with time and was lowest in NaCl at 1 and 4 h. There was no significant difference in glucose levels, but a significant pyruvate decrease in L-15 and a significant lactate increase in all media. TUNEL showed apoptosis rates ranging from 0 to 5%. FACS showed a mean of 4% necrotic cells and 15–19% apoptotic cells after 1 h of incubation, but less than 1% necrotic cells and 2–6% apoptotic cells after 24 h in all media. Conclusion Our results indicate marked metabolic activity in ovarian tissue at 4 °C and suggest that cells use internal sources of energy, which may influence transplantation outcomes. This highlights the importance of better understanding whole tissue dynamics to develop a standard protocol for ovarian tissue transportation. Graphical abstract
ISSN:1058-0468
1573-7330
DOI:10.1007/s10815-020-01935-y