Histone remodeling reflects conserved mechanisms of bovine and human preimplantation development - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Accéder directement au contenu
Article Dans Une Revue EMBO Reports Année : 2023

Histone remodeling reflects conserved mechanisms of bovine and human preimplantation development

Résumé

How histone modifications regulate changes in gene expression during preimplantation development in any species remains poorly understood. Using CUT&Tag to overcome limiting amounts of biological material, we profiled two activating (H3K4me3 and H3K27ac) and two repressive (H3K9me3 and H3K27me3) marks in bovine oocytes, 2-, 4-, and 8-cell embryos, morula, blastocysts, inner cell mass, and trophectoderm. In oocytes, broad bivalent domains mark developmental genes, and prior to embryonic genome activation (EGA), H3K9me3 and H3K27me3 co-occupy gene bodies, suggesting a global mechanism for transcription repression. During EGA, chromatin accessibility is established before canonical H3K4me3 and H3K27ac signatures. Embryonic transcription is required for this remodeling, indicating that maternally provided products alone are insufficient for reprogramming. Last, H3K27me3 plays a major role in restriction of cellular potency, as blastocyst lineages are defined by differential polycomb repression and transcription factor activity. Notably, inferred regulators of EGA and blastocyst formation strongly resemble those described in humans, as opposed to mice. These similarities suggest that cattle are a better model than rodents to investigate the molecular basis of human preimplantation development.
Fichier non déposé

Dates et versions

hal-03992249 , version 1 (16-02-2023)

Identifiants

Citer

Chuan Zhou, Michelle Halstead, Amélie Bonnet-Garnier, Richard Schultz, Pablo Ross. Histone remodeling reflects conserved mechanisms of bovine and human preimplantation development. EMBO Reports, 2023, ⟨10.15252/embr.202255726⟩. ⟨hal-03992249⟩
15 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More