DNA methylation pattern in pig in vivo produced embryos |
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Authors: | Josef Fulka Helena Fulka Tomas Slavik Konosuke Okada Josef Fulka Jr |
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Institution: | (1) Center for Cell Therapy and Tissue Repair, IAPG Czech Academy of Sciences, 277 21 Libechov, Czech Republic;(2) Institute of Animal Production, Pratelstvi 815, POB 1, 104 01 Prague 114, Czech Republic;(3) Institute of Experimental Medicine, Czech Academy of Sciences, Videnska 1083, 142 20 Prague 4, Czech Republic |
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Abstract: | DNA methylation/demethylation pattern, determined by 5-methylcytosine (5-MeC) immunostaining, was evaluated in porcine “in vivo” produced embryos from zygote up to the blastocyst stage. In one-cell stage embryos, only the maternal pronucleus showed a positive labeling whilst the paternal pronucleus showed almost no labeling. The intensity of labeling is high until the late morula stage. Blastocysts containing less than 100 cells showed the same intensity of labeling in both the inner cell mass (ICM) nuclei and the trophectodermal (TE) cell nuclei. Interestingly, with further cell multiplication, cells of the ICM became more intensively labeled when compared to TE cells. This distinct methylation pattern is even more profound in blastocysts containing about 200–300 cells and is not caused by the difference in the cell volume of ICM and TE cells.An erratum to this article can be found at |
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Keywords: | Methylation DNA Embryos Pig |
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