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Igonina, T N; Rakhmanova, T A; Omelchenko, A N; Okotrub, K A; Brusentsev, E Yu; Rozhkova, I N; Amstislavsky, S Ya
Cryo-Letters, 2024 Jan-Feb, Letnik: 45, Številka: 1Journal Article
Intracellular lipids are sensitive to freezing. Lipidome modification is an important tool for studying the role of intracellular lipids in cryotolerance of mammalian oocytes and preimplantation embryos. To study the effects of in vitro exposure of murine embryos to saturated stearic acid (SA) on the lipid content, embryo development and cryotolerance. In vivo derived mouse embryos were cultured with 100 uM SA for 48 h up to the morula/blastocyst stage. Some of the SA-treated embryos were chosen for the evaluation of their development competence and the change in the lipidome, and other embryos were either slowly frozen or rapidly vitrified. Nile red staining combined with confocal laser scanning microscopy revealed a decrease in the total amount of lipids in the SA-treated embryos. Raman measurements showed that the lipid unsaturation was lower in embryos after in vitro SA culture. The addition of SA did not affect the embryo development before cryopreservation, but negatively affected the results of slow freezing cryopreservation and vitrification. In vitro SA exposure lowered the total amount of intracellular lipids and unsaturation in mouse embryos. The changes were accompanied with a significantly lower efficacy of embryo cryopreservation. https://doi.org/10.54680/fr24110110512.
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