Sujet : Quel est l’influence de la vitrification des ovocytes sur l’épigénétique et l’expression des gènes ?
Auteurs : Julie Barberet, Fatima Barry, Cécile Choux, Magali Guilleman, Sara Karoui, Raymond Simonot, Céline Bruno & Patricia Fauque.
CHU Dijon Bourgogne, Laboratoire de Biologie de la Reproduction, CECOS, 14 rue Gaffarel, 21079, Dijon Cedex, France
Date de mise en ligne : 10 août 2020
Résumé
Children conceived by assisted reproductive technologies (ART) have a moderate risk for a number of adverse events and conditions. The question whether this additional risk is associated with specific procedures used in ART or whether it is related to the intrinsic biological factors associated with infertility remains unresolved. One of the main hypotheses is that laboratory procedures could have an effect on the epigenome of gametes and embryos. This suspicion is linked to the fact that ART procedures occur precisely during the period when there are major changes in the organization of the epigenome. Oocyte freezing protocols are generally considered safe; however, some evidence suggests that vitrification may be associated with modifications of the epigenetic marks. In this manuscript, after describing the main changes that occur during epigenetic reprogramming, we will provide current information regarding the impact of oocyte vitrification on epigenetic regulation and the consequences on gene expression, both in animals and humans. Overall, the literature suggests that epigenetic and transcriptomic profiles are sensitive to the stress induced by oocyte vitrification, and it also underlines the need to improve our knowledge in this field.
Mots clés : DNA methylation, Epigenetics, Gene expression, Oocyte, Vitrification
Citation : : Barberet, J., Barry, F., Choux, C. et al. What impact does oocyte vitrification have on epigenetics and gene expression?. Clin Epigenet 12, 121 (2020). https://doi.org/10.1186/s13148-020-00911-8
Lien : https://clinicalepigeneticsjournal.biomedcentral.com/articles/10.1186/s13148-020-00911-8
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