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- W2048618744 abstract "Genomic imprinting plays a very important role during development and its abnormality may heavily undermine the developmental potential of bovine embryos. Because of limited resources of the cow genome, bovine genomic imprinting, both in normal development and in somatic cell nuclear transfer (SCNT) cloning, is not well documented. DNA methylation is thought to be a major factor for the establishment of genomic imprinting. In our study, we determined the methylation status of differential methylated regions (DMRs) of four imprinted genes in four spontaneously aborted SCNT-cloned fetuses (AF). Firstly, abnormal methylation imprints were observed in each individual to different extents. In particular, Peg3 and MAOA were either seriously demethylated or showed aberrant methylation patterns in four aborted clones we tested, but Xist and Peg10 exhibited relatively better maintained methylation status in AF1 and AF4. Secondly, two aborted fetuses, AF2 and AF3 exhibited severe aberrant methylation imprints of four imprinted genes. Finally, MAOA showed strong heterogeneous methylation patterns of its DMR in normal somatic adult tissue, but largely variable methylation levels and relatively homogeneous methylation patterns in aborted cloned fetuses. Our data indicate that the aborted cloned fetuses exhibited abnormal methylation imprints, to different extent, in aborted clones, which partially account for the higher abortion and developmental abnormalities during bovine cloning. Mol. Reprod. Dev. 75: 598–607, 2008. © 2007 Wiley-Liss, Inc." @default.
- W2048618744 created "2016-06-24" @default.
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- W2048618744 date "2008-01-01" @default.
- W2048618744 modified "2023-09-27" @default.
- W2048618744 title "Aberrant DNA methylation imprints in aborted bovine clones" @default.
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- W2048618744 doi "https://doi.org/10.1002/mrd.20803" @default.
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