scholarly journals Differential Effects of Progesterone on COX-2 and Mn-SOD Expressions Are Associated with Histone Acetylation Status of the Promoter Region in Human Endometrial Stromal Cells

2011 ◽  
Vol 96 (7) ◽  
pp. E1073-E1082 ◽  
Author(s):  
Isao Tamura ◽  
Toshiaki Taketani ◽  
Lifa Lee ◽  
Fumie Kizuka ◽  
Ken Taniguchi ◽  
...  
Keyword(s):  
Histone Acetylation ◽  
Stromal Cells ◽  
Promoter Region ◽  
Endometrial Stromal Cells ◽  
Differential Effects ◽  
Acetylation Status ◽  
Cox 2

scholarly journals Induction of IGFBP-1 Expression by cAMP Is Associated with Histone Acetylation Status of the Promoter Region in Human Endometrial Stromal Cells

Endocrinology ◽  
2012 ◽  
Vol 153 (11) ◽  
pp. 5612-5621 ◽  
Author(s):  
Isao Tamura ◽  
Hiromi Asada ◽  
Ryo Maekawa ◽  
Manabu Tanabe ◽  
Lifa Lee ◽  
...  
Keyword(s):  
Dna Methylation ◽  
Histone Acetylation ◽  
Stromal Cells ◽  
Promoter Region ◽  
Binding Protein ◽  
Methylation Status ◽  
Cell Types ◽  
Promoter Regions ◽  
Endometrial Stromal Cells ◽  
Acetylation Status

Abstract Many genes are up- or down-regulated in human endometrial stromal cells (ESCs) undergoing decidualization. IGF-binding protein-1 (IGFBP-1) and prolactin (PRL) are preferentially expressed during decidualization and are recognized as specific markers of decidualization. This study investigated the involvement of epigenetic mechanisms in the regulation of IGFBP-1 and PRL induction by decidualization in ESCs. ESCs isolated from the proliferative phase endometrium were incubated with cAMP to induce decidualization. Human dermal fibroblasts (HDFs) were used as a nonendometrial control. cAMP induced the expressions of both genes in ESCs but induced the expression of only PRL in HDFs. Histone acetylation levels of the IGFBP-1 promoter region evaluated by chromatin immunoprecipitation assay were higher in ESCs than in HDFs. The IGFBP-1 promoter regions in the two cell types showed similar levels of DNA hypomethylation. The histone acetylation levels and DNA methylation status of the PRL promoter and enhancer regions were similar in the two cell types. cAMP had no significant effects on the histone acetylation levels and DNA methylation status of the IGFBP-1 promoter and the PRL promoter and enhancer regions in ESCs. Cotreatment of HDF with cAMP and histone deacetylase inhibitors induced IGFBP-1 expression, which was accompanied by an increased histone acetylation level and recruitment of CCAAT/enhancer-binding protein-β to the promoter region. These results show that, during decidualization in ESCs, high histone acetylation status of the promoter regions of IGFBP-1 and PRL is associated with the induction of the IGFBP-1 and PRL genes by making the promoter regions accessible to transcriptional factors.

scholarly journals Importance of C/EBPβ Binding and Histone Acetylation Status in the Promoter Regions for Induction of IGFBP-1, PRL, and Mn-SOD by cAMP in Human Endometrial Stromal Cells

Endocrinology ◽  
2014 ◽  
Vol 155 (1) ◽  
pp. 275-286 ◽  
Author(s):  
Isao Tamura ◽  
Shun Sato ◽  
Maki Okada ◽  
Manabu Tanabe ◽  
Lifa Lee ◽  
...  
Keyword(s):  
Histone Acetylation ◽  
Stromal Cells ◽  
Manganese Superoxide Dismutase ◽  
Mrna Levels ◽  
Epigenetic Mechanisms ◽  
Promoter Regions ◽  
Gene Expressions ◽  
Endometrial Stromal Cells ◽  
Acetylation Status ◽  
Igf Binding

Dynamic changes of gene expressions occur in human endometrial stromal cells (ESCs) during decidualization. CCAAT/enhancer-binding proteinβ (C/EBPβ) regulates the expression of a number of decidualization-related genes. In addition to transcription factors, it is important to know the role of epigenetic mechanisms, such as histone modifications in the regulation of decidualization-related genes. This study investigated the molecular and epigenetic mechanisms by which cAMP up-regulates the expression of IGF-binding protein-1 (IGFBP-1), prolactin (PRL), and manganese superoxide dismutase (Mn-SOD) in ESC. ESCs isolated from proliferative phase endometrium were incubated with cAMP to induce decidualization. IGFBP-1, PRL, and Mn-SOD mRNA expressions were determined by real-time RT-PCR. The C/EBPβ binding and histone modification status (acetylation of histone-H3 lysine-27 [H3K27ac]) in the promoter were examined by chromatin immunoprecipitation assay. Knockdowns of C/EBPβ were performed using the small interfering RNA method. cAMP induced mRNA expressions of IGFBP-1 and PRL accompanied by the increases in both C/EBPβ binding activities and H3K27ac levels in the promoters. The stimulatory effects of cAMP on mRNA levels and H3K27ac levels were completely abolished by C/EBPβ knockdown. cAMP increased Mn-SOD mRNA levels and C/EBPβ binding activities in the enhancer region. C/EBPβ knockdown inhibited Mn-SOD mRNA levels. The H3K27ac levels in the enhancer were high before cAMP stimulus but were not further increased by cAMP and were not inhibited by C/EBPβ knockdown. These results show that C/EBPβ regulates the expression of IGFBP-1 and PRL by altering the histone acetylation status of their promoters but differently regulates Mn-SOD gene expression in human ESC during decidualization.

Peritoneal fluid of patients with endometriosis promotes proliferation of endometrial stromal cells and induces COX-2 expression

2011 ◽  
Vol 95 (5) ◽  
pp. 1836-1838 ◽  
Author(s):  
Yuhuan Liu ◽  
Jingjing Hu ◽  
Wei Shen ◽  
Jiaqi Wang ◽  
Chao Chen ◽  
...  
Keyword(s):  
Stromal Cells ◽  
Peritoneal Fluid ◽  
Endometrial Stromal Cells ◽  
Cox 2

Atypical expression of COX-2, StAR, CYP19A1 and apoptotic regulators in CD90 positive endometrial stromal cells from women with endometriosis

2013 ◽  
Vol 5 (2) ◽  
pp. 77-85
Author(s):  
Balamuthu Kadalmani ◽  
Hugh S. Taylor ◽  
Graciela Krikun ◽  
Kavitha Palanivel
Keyword(s):  
Stromal Cells ◽  
Endometrial Stromal Cells ◽  
Cox 2

Effects of Celecoxib and Nimesulide on the Proliferation of Ectopic Endometrial Stromal Cells in vitro

2008 ◽  
Vol 36 (5) ◽  
pp. 1032-1038 ◽  
Author(s):  
B Kong ◽  
Y Tian ◽  
W Zhu ◽  
S Su ◽  
Y Kan
Keyword(s):  
Cell Cycle ◽  
Stromal Cells ◽  
Prostaglandin E ◽  
Apoptotic Cells ◽  
Dependent Manner ◽  
Selective Inhibitors ◽  
Endometrial Stromal Cells ◽  
Cox 2 ◽  
Dose Dependent

The effects of cyclooxygenase 2 (COX-2) selective inhibitors on the proliferation of ectopic endometrial stromal cells in vitro were investigated. Ectopic endometrial stromal cells were treated with either celecoxib or nimesulide for 24 and 48 h. The results showed that (i) both celecoxib and nimesulide inhibited the proliferation of ectopic endometrial stromal cells in vitro in a time- and dose-dependent manner; (ii) the expression of prostaglandin E2 was significantly inhibited by both celecoxib and nimesulide in a dose-dependent manner; (iii) the percentage of apoptotic cells was significantly higher for cells treated with celecoxib or nimesulide than for untreated cells; and (iv) the percentage of the cells in the G0/G1 phase increased after the cells were treated with either agent in a dose-dependent manner. These data suggest that celecoxib and nimesulide inhibited proliferation of ectopic endometrial stromal cells by inducing apoptosis and blocking the cell cycle at the G0/G1 phase.

scholarly journals Ubiquitin-Proteasomal Degradation of COX-2 in TGF-β Stimulated Human Endometrial Cells Is Mediated Through Endoplasmic Reticulum Mannosidase I

Endocrinology ◽  
2012 ◽  
Vol 153 (1) ◽  
pp. 426-437 ◽  
Author(s):  
Mohan Singh ◽  
Parvesh Chaudhry ◽  
Sophie Parent ◽  
Eric Asselin
Keyword(s):  
Endoplasmic Reticulum ◽  
Stromal Cells ◽  
Small Interfering Rna ◽  
Proteasomal Degradation ◽  
26S Proteasome ◽  
Dependent Manner ◽  
Endometrial Stromal Cells ◽  
Endometrial Cells ◽  
Cox 2 ◽  
Interfering Rna

Cyclooxygenase (COX)-2 is a key regulatory enzyme in the production of prostaglandins (PG) during various physiological processes. Mechanisms of COX-2 regulation in human endometrial stromal cells (human endometrial stromal cells) are not fully understood. In this study, we investigate the role of TGF-β in the regulation of COX-2 in human uterine stromal cells. Each TGF-β isoform decreases COX-2 protein level in human uterine stromal cells in Smad2/3-dependent manner. The decrease in COX-2 is accompanied by a decrease in PG synthesis. Knockdown of Smad4 using specific small interfering RNA prevents the decrease in COX-2 protein, confirming that Smad pathway is implicated in the regulation of COX-2 expression in human endometrial stromal cells. Pretreatment with 26S proteasome inhibitor, MG132, significantly restores COX-2 protein and PG synthesis, indicating that COX-2 undergoes proteasomal degradation in the presence of TGF-β. In addition, each TGF-β isoform up-regulates endoplasmic reticulum (ER)-mannosidase I (ERManI) implying that COX-2 degradation is mediated through ER-associated degradation pathway in these cells. Furthermore, inhibition of ERManI activity using the mannosidase inhibitor (kifunensine), or small interfering RNA-mediated knockdown of ERManI, prevents TGF-β-induced COX-2 degradation. Taken together, these studies suggest that TGF-β promotes COX-2 degradation in a Smad-dependent manner by up-regulating the expression of ERManI and thereby enhancing ER-associated degradation and proteasomal degradation pathways.

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