Histone acetylation is involved in TCDD‑induced cleft palate formation in fetal mice.

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 Rep

authors

Yuan X,Qiu L,Pu Y,Liu C,Zhang X,Wang C,Pu W,Fu Y

doi

10.3892/mmr.2016.5348

subject

Has Abstract

pub_date

2016-08-01 00:00:00

pages

1139-45

issue

2

eissn

1791-2997

issn

1791-3004

journal_volume

14

pub_type

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