Estrogen-enhanced peptidylarginine deiminase type IV gene (PADI4) expression in MCF-7 cells is mediated by estrogen receptor-α-promoted transfactors activator protein-1, nuclear factor-Y, and Sp1

被引:52
作者
Dong, Sijun
Zhang, Zilian
Takahara, Hidenari [1 ]
机构
[1] Ibaraki Univ, Sch Agr, Dept Appl Biol Resource Sci, Ami, Ibaraki 30003, Japan
[2] Natl Inst Adv Ind Sci & Technol, Res Inst Cell Engn, Tsukuba, Ibaraki 305, Japan
关键词
D O I
10.1210/me.2006-0550
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Human peptidylarginine deiminase type IV (PAD4), a Ca2+-dependent enzyme known to convert arginine residues to citrulline residues in histones, has been shown to be associated with the development of rheumatoid arthritis. Recently, it was noted that the human peptidylarginine deiminase type IV gene (PADI4) regulates the expression of estrogenresponsive genes by modifying the methylated arginine sites in histones H3 and H4. In this study, we demonstrated that PADI4 was expressed in MCF-7 cells and was responsive to estrogen at the transcriptional level. Using the luciferase reporter gene fused to wild-type or mutated 5'-flanking region of PADI4, we characterized that as few as 348 bp upstream from the transcription initiation site were sufficient to direct transcription of the reporter gene. Chromatin immunoprecipitation and small interfering RNA assays revealed that activator protein-1, Sp1/Sp3, and nuclear factor-Y were cis-acting factors bound to the minimal promoter of PADI4 and that they regulated gene expression in a cooperative manner. Moreover, it was indicated that estrogen stimulated PADI4 expression through binding of estrogen receptor (ER)-alpha to the upstream of the PADI4 gene and ER alpha-mediated enhancement of activator protein-1, Sp1, and nuclear factor-Y levels. These findings indicated that estrogen stimulated PADI4 expression through both of the classical and nonclassical ER-mediated pathways.
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页码:1617 / 1629
页数:13
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