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Journal Article
Research Support, Non-U.S. Gov't
Prenatal exposure to ethanol: a specific effect on the H19 gene in sperm.
Reproductive Toxicology 2011 May
Alcohol exposure during pregnancy induces a range of disorders in the offspring. Methylation changes in imprinted genes may play a role in the teratogenic effects of alcohol. We evaluated the possible effects of alcohol administration in pregnant mice on the methylation pattern of 5 imprinted genes (H19, Gtl2, Peg1, Snrpn and Peg3) in somatic and sperm cell DNAs of the male offspring. The effects observed were a 3% (p < 0.005) decrease in the number of methylated CpGs of H19 in the F1 offspring sperm, a 4% (p < 0.005) decrease in the number of methylated CpGs of H19 in the F2 offspring brain and a 26% (p < 0.05) decrease in the mean sperm concentration. CpGs 1 and 2 of the H19 CTCF-binding site 2 exhibited significant methylation percentage losses. H19 CTCF-binding sites are important for the regulation of Igf2 gene expression. The hypomethylation of H19 may contribute to the decreased spermatogenesis in the offspring.
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