Abstract:
:The aim of the present was to evaluate the effects of DNA methylation and histone acetylation on 2,3,7,8‑tetrachlorodibenzo‑p‑dioxin (TCDD)‑induced cleft palate in fetal mice. Pregnant mice (n=10) were randomly divided into two groups: i) TCDD group, mice were treated with 28 µg/kg TCDD on gestation day (GD) 10 by oral gavage; ii) control group, mice were treated with an equal volume of corn oil. On GD 16.5, the fetal mice were evaluated for the presence of a cleft palate. An additional 36 pregnant mice were divided into the control and TCDD groups, and palate samples were collected on GD 13.5, GD 14.5 and GD 15.5, respectively. Transforming growth factor‑β3 (TGF‑β3) mRNA expression, TGF‑β3 promoter methylation, histone acetyltransferase (HAT) activity and histone H3 (H3) acetylation in the palates were evaluated in the two groups. The incidence of a cleft palate in the TCDD group was 93.55%, and no cases of cleft palate were identified in the control group. On GD 13.5 and GD 14.5, TGF‑β3 mRNA expression, HAT activity and acetylated H3 levels were significantly increased in the TCDD group compared with the control. Methylated bands were not observed in the TCDD or control groups. In conclusion, at the critical period of palate fusion (GD 13.5‑14.5), TCDD significantly increased TGF‑β3 gene expression, HAT activity and H3 acetylation. Therefore, histone acetylation may be involved in TCDD‑induced cleft palate formation in fetal mice.
journal_name
Mol Med Repjournal_title
Molecular medicine reportsauthors
Yuan X,Qiu L,Pu Y,Liu C,Zhang X,Wang C,Pu W,Fu Ydoi
10.3892/mmr.2016.5348subject
Has Abstractpub_date
2016-08-01 00:00:00pages
1139-45issue
2eissn
1791-2997issn
1791-3004journal_volume
14pub_type
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