The presence of acylated ghrelin duringin vitromaturation of bovine oocytes induces cumulus cell DNA damage and apoptosis, and impairs early embryo development

Author:

Sirini Matias A.,Anchordoquy Juan Mateo,Anchordoquy Juan Patricio,Pascua Ana M.,Nikoloff Noelia,Carranza Ana,Relling Alejandro E.,Furnus Cecilia C.

Abstract

SummaryThe aim of this study was to investigate the effects of acylated ghrelin supplementation duringin vitromaturation (IVM) of bovine oocytes. IVM medium was supplemented with 20, 40 or 60 pM acylated ghrelin concentrations. Cumulus expansion area and oocyte nuclear maturation were studied as maturation parameters. Cumulus–oocyte complexes (COC) were assessed with the comet, apoptosis and viability assays. Thein vitroeffects of acylated ghrelin on embryo developmental capacity and embryo quality were also evaluated. Results demonstrated that acylated ghrelin did not affect oocyte nuclear maturation and cumulus expansion area. However, it induced cumulus cell (CC) death, apoptosis and DNA damage. The damage increased as a function of the concentration employed. Additionally, the percentages of blastocyst yield, hatching and embryo quality decreased with all acylated ghrelin concentrations tested. Our study highlights the importance of acylated ghrelin in bovine reproduction, suggesting that this metabolic hormone could function as a signal that prevents the progress to reproductive processes.

Publisher

Cambridge University Press (CUP)

Subject

Cell Biology,Developmental Biology

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