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Expression of DNA methyltransferases in the mouse uterus during early pregnancy and susceptibility to dietary folate deficiency.
MedLine Citation:
PMID:  22580371     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
We have characterized the uterine expression of DNA methyltransferases (DNMTs) during early pregnancy in mice and determined whether a folate-deficient diet can affect DNMTs in this context. Within endometrial cells, expression of DNA methyltransferase (cytosine-5) 1 (Dnmt1), Dnmt3a and Dnmt3b were significantly elevated during the pre-receptive phase of pregnancy but generally returned to baseline levels during receptive and post-implantation periods. As such, the transcription of DNMT genes is temporally regulated during early pregnancy. When comparisons were made between implantation sites (IS) and Inter-IS on days 5 of pregnancy, lower levels of Dnmt3a were detected at IS. Comparisons between IS and Inter-IS did not reveal significant expression differences for other DNMT genes. When tissue sections were examined, DNMT3A was specifically lower in the stroma of IS. Reduced DNMT1 and DNMT3B levels were also observed in the luminal and glandular epithelia of IS, whereas no obvious differences in the stroma were detected. In pseudo-pregnant mice subjected to a folate-deficient diet, levels of Dnmt1 and Dnmt3a (but not Dnmt3b) were significantly upregulated in endometrial tissues, as compared with controls. When tissues from these folate-deficient mice were examined, DNMT1 levels were elevated in both the luminal and glandular epithelia, whereas DNMT3A was upregulated in the luminal epithelium and the stroma. A slight increase in DNMT3B levels was detected in the glandular epithelium. These results indicate that DNMTs may regulate the transcription of endometrial genes associated with embryo implantation and that levels of DNMTs are affected by dietary folate in mice.
Authors:
Yubin Ding; Junlin He; Xueqing Liu; Xuemei Chen; Chunlan Long; Yingxiong Wang
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-5-10
Journal Detail:
Title:  Reproduction (Cambridge, England)     Volume:  -     ISSN:  1741-7899     ISO Abbreviation:  -     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-5-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100966036     Medline TA:  Reproduction     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Y Ding, School of Public Health, Chongqing Medical University, Chongqing, 400016, China.
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