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Epigenetic modulation on cat-cow interspecies somatic cell nuclear transfer embryos by treatment with trichostatin A.
Animal Science Journal 2017 April
This study aimed to determine the acetylation at lysine 9/18/23 of histone H3 (H3K9ac/H3K18ac/H3K23ac; H3K9/18/23 ac) and the di-methylation at lysine 9 of histone H3 (H3K9me2) during early embryogenesis among trichostatin A (TSA)-treated interspecies somatic cell nuclear transfer (iSCNT) cat-cow (TSA-iSCNT) embryos, TSA-untreated iSCNT cat-cow control (control) embryos and bovine in vitro fertilization (IVF) embryos, because TSA-iSCNT embryos can develop to blastocysts. Compared to the control embryos, higher expressions of H3K9/18/23 ac were observed in TSA-iSCNT embryos and IVF embryos at most following stages (2 h post-fusion / post-insemination (PF/PI) to eight-cell stage). At 6 h PF/PI the expression of H3K9/23 ac in TSA-iSCNT embryos and IVF embryos were lower than those in control embryos, and the expression of H3K18ac was no difference among the three groups. The expression of H3K9/23 ac increased in TSA-iSCNT embryos and IVF embryos at pronuclear (PN) stages. The expression of H3K9me2 in TSA-iSCNT embryos resembled that of IVF embryos at 2 h PF/PI to PN stages, and these expression levels were greater than those of control embryos. These results suggest that treatment of iSCNT embryos with TSA modifies the patterns of histone modification at certain lysine residues in a manner that is comparable with that seen in IVF during early embryogenesis.
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