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- W2110115944 abstract "Embryonic stem cells (ESCs) maintain unique epigenetic states to maintain their pluripotency. Differentiation of ESCs into specialized cell types requires changes in these epigenetic states. However, the dynamics of epigenetic marks found in hESCs during differentiation are poorly understood. Here, we report the variation in the dynamics of epigenetic modifications associated with the expression of lineage-specific genes during differentiation of hESCs to hepatocytes in vitro. The promoter regions of pluripotency marker genes characterized by permissive histone marks such as trimethylation of H3 at lysine 4 (H3K4me3) and acetylation of H3 at lysine 9 (H3K9ac) in hESCs were instead enriched with repressive histone marks such as dimethylation of H3 at lysine 9 (H3K9me2), trimethylation of H3 at lysine 9 (H3K9me3) and trimethylation of H3 at lysine 27 (H3K27me3) during differentiation to hepatocytes. Interestingly, expression of definitive endoderm marker genes containing bivalent and non-bivalent domains may be modulated by a marked reduction in H3K27me3 and a significant enhancement of permissive marks such as H3K4me3 and H3K9ac during hESC differentiation. Expression of hepatocyte marker genes regulated by histone modifications was similar to that of pluripotency marker genes. Our findings provide insight into the epigenetic mechanisms regulating expression of developmental genes. Of particular interest, they may be differentially regulated either in a bivalent or non-bivalent domain manner during hESC differentiation." @default.
- W2110115944 created "2016-06-24" @default.
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- W2110115944 date "2010-11-08" @default.
- W2110115944 modified "2023-09-27" @default.
- W2110115944 title "Epigenetic signatures and temporal expression of lineage-specific genes in hESCs during differentiation to hepatocytes in vitro" @default.
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- W2110115944 doi "https://doi.org/10.1093/hmg/ddq476" @default.
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