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Metabolomic analysis reveals changes in preimplantation embryos following fresh or vitrified transfer

TitleMetabolomic analysis reveals changes in preimplantation embryos following fresh or vitrified transfer
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2020
AuthorsGarcia-Dominguez, X., Diretto Gianfranco, Frusciante Sarah, Vicente J.S., and Marco-Jiménez F.
JournalInternational Journal of Molecular Sciences
Volume21
Pagination1-13
ISSN16616596
KeywordsAnimals, Blastocyst, Cryopreservation, Developmental plasticity, Developmental programming, Embryo manipulation, Embryo Transfer, Embryonic Development, Female, metabolism, metabolomics, Rabbits, stress
Abstract

Although assisted reproduction technologies (ARTs) are recognised as safe, and most of the offspring seem apparently healthy, there is clear evidence that ARTs are associated with changes in the embryo’s developmental trajectory, which incur physiological consequences during the prenatal and postnatal stages of life. The present study aimed to address the influence of early (day3 embryos) embryo transfer and cryopreservation on embryo survival, size, and metabolome at the preimplantation stage (day-6 embryos). To this end, fresh-transferred (FT) and vitrified-transferred (VT) embryos were compared using naturally-conceived (NC) embryos as a control reference. The results show that as in vitro manipulation was increased (NC < FT < VT), both embryo survival rate (0.91 ± 0.02, 0.78 ± 0.05 and 0.63 ± 0.05, for NC, FT, and VT groups, respectively) and embryo size (3.21 ± 0.49 mm, 2.15 ± 0.51 mm, 1.76 ± 0.46 mm of diameter for NC, FT, and VT groups, respectively) were significantly decreased. Moreover, an unbiased metabolomics analysis showed overall downaccumulation in 40 metabolites among the three experimental groups, with embryo transfer and embryo cryopreservation procedures both exerting a cumulative effect. In this regard, targeted metabolomics findings revealed a significant reduction in some metabolites involved in metabolic pathways, such as the Krebs cycle, amino acids, unsaturated fatty acids, and arachidonic acid metabolisms. Altogether, these findings highlight a synergistic effect between the embryo transfer and vitrification procedures in preimplantation embryos. However, the ex vivo manipulation during embryo transfer seemed to be the major trigger of the embryonic changes, as the deviations added by the vitrification process were relatively smaller. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85091678295&doi=10.3390%2fijms21197116&partnerID=40&md5=256466ad18fa4ce665b44293a1533fc6
DOI10.3390/ijms21197116
Citation KeyGarcia-Dominguez20201