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• W2992130567 abstract "Epigenetic modification and expression of key pluripotent factors are critical for development, cell fate determination, and differentiation in early embryos. In this study, we systematically examined the dynamic patterns of histone modifications (H3K4me3 and H3K27me3) and Nanog expression during the development of preimplantation rabbit embryos. Rabbit oocytes, 1-, 2-, 4-, 8-, and 16-cell embryos, morulae, and blastocysts were collected at specific time points following superovulation and assessed for nuclear H3K4me3, H3K27me3, and Nanog expression by immunofluorescence microscopy. The frequency of H3K4me3-positive nuclear staining was highest in oocytes through 4-cell embryos (100%), decreased in 8-cell (97.2%) and 16-cell (94.4%) embryos (P > 0.05), declined dramatically in morulae (86.7%) (1- through 8-cell embryos vs morulae, P < 0.05), and was the lowest in blastocysts (76.2%) (P < 0.05). Nuclear staining of H3K27me3 was negative in oocytes and embryos through the 16-cell stage but was positive in 25.9% of morulae and 34.2% of blastocyst (P < 0.05). Similarly, rabbit oocytes and embryos through the 16-cell stage did not express Nanog, but Nanog was expressed in 24.9% of morulae and 36.5% of blastocysts (P < 0.05). The observed decrease in H3K4me3 and increase in H3K27me3 as development progressed in preimplantation rabbit embryos, together with late Nanog expression, indicates a correlation of these factors with early embryonic cell fate determination and differentiation. Our study provides a specific and dynamic profile of histone modifications and gene expression that will be important for the derivation of rabbit embryonic stem cells and improving rabbit cloning by somatic cell nuclear transfer." @default.
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• W2992130567 date "2019-01-01" @default.
• W2992130567 modified "2023-10-14" @default.
• W2992130567 title "Dynamic patterns of H3K4me3, H3K27me3, and Nanog during rabbit embryo development." @default.
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