Abstract
Purpose
The aim of this study was to analyze the metabolic profiles of blastocoel fluid (BF) obtained from bovine embryos produced in vivo and in vitro.
Methods
Expanded blastocysts (20/group) that were in vitro and in vivo derived at day 7 were used. BF was collected and analyzed under direct infusion conditions using a microTOF-Q® mass spectrometer with electrospray ionization and a mass range of 50–650 m/z.
Results
The spectrometry showed an evident difference in the metabolic profiles of BF from in vivo and in vitro produced embryos. These differences were very consistent between the samples of each group suggesting that embryo fluids can be used to identify the origin of the embryo. Ions 453.15 m/z, 437.18 m/z, and 398.06 m/z were identified as biomarkers for the embryo’s origin with 100% sensitivity and specificity. Although it was not possible to unveil the molecular identity of the differential ions, the resulting spectrometric profiles provide a phenotype capable of differentiating embryos and hence constitute a potential parameter for embryo selection.
Conclusion
To the best of our knowledge, our results showed, for the first time, an evident difference between the spectrometric profiles of the BF from bovine embryos produced in vivo and in vitro.
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Acknowledgements
We would like to thank the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brazil (CAPES) for the scholarship granted to Fernandes GO. This research was only possible due to the assistance of the research team of the Mass Spectrometry Laboratory at Embrapa Genetic Resource and Dr. Marcelo Henrique Soller Ramada, University Catholica de Brasília. The authors thank Dr. José de Lima Cardozo Filho for his valuable advice regarding the analysis and his support during the laboratory work. The authors would also like to thank Dr. Carlos Frederico Martins and Dr. Andrei Fidelis (DVM).
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The Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Brazil for the scholarship of Fernandes GO. The Embrapa Recursos Genéticos e Biotecnologia, Brazil. The Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Brazil.
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Gabriela de Oliveira Fernandes, Otávio Augusto Costa de Faria, Daniel Nogoceke Sifuentes, and Maurício Machaim Franco. The first draft of the manuscript was written by Gabriela de Oliveira Fernandes and Margot Alves Nunes Dode and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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The experiment was approved by the Animal Use Ethics Committee of Embrapa Genetic Resources and Biotechnology (CEUA/CENARGEN) protocol number 004/2017.
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de Oliveira Fernandes, G., de Faria, O.A.C., Sifuentes, D.N. et al. Electrospray mass spectrometry analysis of blastocoel fluid as a potential tool for bovine embryo selection. J Assist Reprod Genet 38, 2209–2217 (2021). https://doi.org/10.1007/s10815-021-02189-y
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DOI: https://doi.org/10.1007/s10815-021-02189-y