MALDI-MS Lipid Profiles of Oocytes Recovered by Ovum Pickup from Bos indicus and 1/2 indicus × taurus with High vs Low Oocyte Yields

Authors

  • KC Silva-Santos,

    1. Laboratório de Biotecnologia da Reprodução Animal (ReproA), DCV-CCA-Universidade Estadual de Londrina (UEL), Londrina, Brazil
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  • CR Ferreira,

    1. ThoMSon Mass Spectrometry Laboratory, Institute of Chemistry, University of Campinas, Londrina, Brazil
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  • GMG Santos,

    1. Laboratório de Biotecnologia da Reprodução Animal (ReproA), DCV-CCA-Universidade Estadual de Londrina (UEL), Londrina, Brazil
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  • MN Eberlin,

    1. ThoMSon Mass Spectrometry Laboratory, Institute of Chemistry, University of Campinas, Londrina, Brazil
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  • LS Siloto,

    1. Laboratório de Biotecnologia da Reprodução Animal (ReproA), DCV-CCA-Universidade Estadual de Londrina (UEL), Londrina, Brazil
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  • CO Rosa,

    1. Laboratório de Biotecnologia da Reprodução Animal (ReproA), DCV-CCA-Universidade Estadual de Londrina (UEL), Londrina, Brazil
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  • TN Marcantonio,

    1. Laboratório de Biotecnologia da Reprodução Animal (ReproA), DCV-CCA-Universidade Estadual de Londrina (UEL), Londrina, Brazil
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  • MM Seneda

    Corresponding author
    1. Laboratório de Biotecnologia da Reprodução Animal (ReproA), DCV-CCA-Universidade Estadual de Londrina (UEL), Londrina, Brazil
    • Author's address (for correspondence): Marcelo Marcondes Seneda, Laboratório de Reprodução Animal (ReproA), DCV-CCA-Universidade Estadual de Londrina (UEL), Londrina, PR 86051-990 Brazil. E-mail: mseneda@uel.br

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Contents

The aim of the present study was to compare the lipid profile in oocytes of indicus and 1/2 indicus × taurus cows with high and low antral follicle count (AFC)/oocyte yields. After an OPU procedure (D0), antral follicles ≥3 mm were counted by ultrasonography (D4, 19, 34, 49, 64), and cows were assigned to groups with either high AFC (≥30 follicles; indicus, NH group; 1/2 indicus × taurus, AH group) or low AFC (≤15 antral follicles; indicus, NL group; 1/2 indicus × taurus, AL group). The lipid profiles of the oocytes were determined by MALDI-MS. For GI, GII and GIII oocytes, the indicus samples tend to cluster separately from the 1/2 indicus × taurus samples. The lipid species [PC (P-38:5) + H]+ and/or [PC (P-36:2) + Na]+, [PC (38:2) + H]+, [PC (38:5) + Na]+ and [TAG (60:8) + NH4]+ were more abundant in indicus (NH and NL groups) than 1/2 indicus × taurus. The higher lipid content in the indicus oocytes likely reflects differences in the rate of lipid metabolism and may contribute to oocyte competence and embryo development.

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