Article (Scientific journals)
Impact of pro-oxidant agents on the morula-blastocyst transition in bovine embryos.
Feugang, Jean-Magloire; Donnay, Isabelle; Mermillod, Pascal et al.
2005In Molecular Reproduction and Development, 71 (3), p. 339-46
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Keywords :
Animals; Blastocyst/cytology/metabolism; Cattle; Cells, Cultured; Male; Morula/cytology/metabolism; Oxidants/toxicity; Oxidative Stress/drug effects; Protein Biosynthesis/drug effects
Abstract :
[en] Exposing day 5 bovine morulae to reactive oxygen species induces a delayed degeneration of some blastocysts on day 8 post-insemination (pi) but without affecting the blastocyst rates. The aim of this study was to characterize the resisting and the degenerating population of blastocysts. The kinetics of degeneration of the embryos exposed to the two pro-oxidant agents: 2,2'-azobis (2-amidinopropane) dihydrochloride (AAPH) and buthionine sulfoximine (BSO) was evaluated using time-lapse cinematography. With both agents the first signs of degeneration appeared at day 7.5 pi but the duration of the degeneration process was shorter in presence of AAPH than BSO (4.2 vs. 12.5 hr, ANOVA, P < 0.05). The resisting blastocysts derived from morulae with a larger diameter (mean diameter: 161 vs. 154 microm, ANOVA, P < 0.05) and showed an earlier cavitation (135 vs. 142 hpi, P < 0.05) than the degenerating ones. The profile of protein neosynthesis at day 7 was not affected by the treatment. The proportion of male embryos was more important in the resisting than in the degenerating population (70 vs. 55%, chi2, P < 0.05) especially when the stress was induced by AAPH. The quality of the resisting embryos, measured by the total cell number and the rate of apoptosis, did not seem to be affected when compared to control embryos. In conclusion, resistance to oxidative stress seems related to the kinetics of development and/or the sex of the embryos. Resisting embryos apparently display a quality similar to untreated embryos.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Feugang, Jean-Magloire
Donnay, Isabelle
Mermillod, Pascal
Marchandise, Joelle
Lequarré, Anne-Sophie ;  Université de Liège - ULiège > Département de productions animales > Génomique animale
Language :
English
Title :
Impact of pro-oxidant agents on the morula-blastocyst transition in bovine embryos.
Publication date :
2005
Journal title :
Molecular Reproduction and Development
ISSN :
1040-452X
eISSN :
1098-2795
Publisher :
John Wiley & Sons, Hoboken, United States - New York
Volume :
71
Issue :
3
Pages :
339-46
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 11 May 2009

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