Diagenode

>>>   Click for Diagenode’s approach to COVID-19

The hypomethylation of imprinted genes in IVF/ICSI placenta samples is associated with concomitant changes in histone modifications.


Choux C, Petazzi P, Sanchez-Delgado M, Hernandez Mora JR, Monteagudo A, Sagot P, Monk D, Fauque P

Although more and more children are born by Assisted Reproductive Technologies (ART), ART safety has not fully been demonstrated. Notably, ART could disturb the delicate step of implantation, and trigger placenta-related adverse outcomes with potential long-term effects, through disrupted epigenetic regulation. We have previously demonstrated that placental DNA methylation was significantly lower after IVF/ICSI than following natural conception at two differentially methylated regions (DMRs) associated with imprinted genes (IGs): and . As histone modifications are critical for placental physiology, the aim of this study was to profile permissive and repressive histone marks in placenta biopsies to reveal a better understanding of the epigenetic changes in the context of ART. Utilizing chromatin immunoprecipitation (ChIP) coupled with quantitative PCR, permissive (H3K4me3, H3K4me2, and H3K9ac) and repressive (H3K9me3 and H3K9me2) post-translational histone modifications were quantified. The analyses revealed a significantly higher quantity of H3K4me2 precipitation in the IVF/ICSI group than in the natural conception group for and DMRs (P = 0.016 and 0.003, respectively). Conversely, the quantity of both repressive marks at and DMRs was significantly lower in the IVF/ICSI group than in the natural conception group (P = 0.011 and 0.027 for ; and P = 0.010 and 0.035 for ). These novel findings highlight that DNA hypomethylation at imprinted DMRs following ART is linked with increased permissive/decreased repressive histone marks, altogether promoting a more permissive chromatin conformation. This concomitant change in epigenetic state at IGs at birth might be an important developmental event because of ART manipulations.

Tags
Antibody

Share this article

Published
June, 2020

Source

Products used in this publication

  • Antibody ChIP-seq grade icon
    C15410003-50
    H3K4me3 Antibody - ChIP-seq Grade
  • Antibody ChIP icon
    C15410060
    H3K9me2 Antibody - ChIP Grade

       Site map   |   Contact us   |   Conditions of sales   |   Conditions of purchase   |   Privacy policy   |   Diagenode Diagnostics