Abstract:
:The recent identification of an intragenic differentially methylated region (DMR) within the last exon of the bovine Insulin-like growth factor 2 (IGF2) gene provides a diagnostic tool for in-depth investigation of bovine imprinting and regulatory mechanisms which are active during embryo development. Here, we used bisulfite sequencing to compare sex-specific DNA methylation patterns within this DMR in bovine blastocysts produced in vivo, by in vitro fertilization and culture, SCNT, androgenesis or parthenogenesis. In in vivo derived embryos, DNA methylation was removed from this intragenic DMR after fertilization, but partially replaced by the time the embryo reached the blastocyst stage. Among embryos developing in vivo, the level of DNA methylation was significantly lower in female than in male blastocysts. This sexual dimorphism was also found between parthenogenetic and androgenetic embryos, and followed the donor cell sex in SCNT derived blastocysts and is evidence for correct methylation reprogramming in SCNT embryos.
journal_name
Genomicsjournal_title
Genomicsauthors
Gebert C,Wrenzycki C,Herrmann D,Gröger D,Thiel J,Reinhardt R,Lehrach H,Hajkova P,Lucas-Hahn A,Carnwath JW,Niemann Hdoi
10.1016/j.ygeno.2009.03.004subject
Has Abstractpub_date
2009-07-01 00:00:00pages
63-9issue
1eissn
0888-7543issn
1089-8646pii
S0888-7543(09)00061-5journal_volume
94pub_type
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