The Bromodomain and extraterminal (BET) inhibitor attenuates inflammatory response and cell migration in human microglia
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ABSTRACT:
PROVIDER: PRJNA649597 | ENA |
REPOSITORIES: ENA
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Project description:We investigated the mechanisms underlying the anti-inflammatory and anti-migratory function and genes targeted by JQ1 in lipopolysaccharide (LPS)-activated human microglia HMC3 cells using RNA sequencing. The BET inhibitor JQ1 attenuates the LPS-induced inflammatory and migratory response. In addition, LPS-induced IRF1 was inhibited by JQ1, and IRF1 suppressed microglial migration by regulating inflammation and migration genes.
2021-04-28 | GSE155408 | GEO
Project description:Purpose: Identification of core transcriptional regulatory programs and bromodomain and extraterminal (BET) protein dependency in liposarcoma (LPS) Methods: ChIP-seq and RNA-seq were performed on LPS cells. Antibodies against H3K27ac, H3K4me1, H3K4me3, RNA-Pol2, BRD2, BRD3, BRD4, FOSL2, pan-RUNX, and DDIT3 (FUS-DDIT3) were used for ChIP-seq assays. The transcriptome responses of LPS141 and MLS402 cells to OTX015 and ARV-825 were compared. Result: We generated genome-wide chromatin-state maps of LPS cells. By charting the super-enhancer structures, we identify a bromodomain and extraterminal (BET) protein-cooperated FUS-DDIT3 function in myxoid LPS and a BET protein-dependent core transcriptional regulatory circuitry consisting of FOSL2, MYC, and RUNX1 in de-differentiated LPS. This study also provides a framework for discovering and targeting of core oncogenic transcriptional programs.
2019-04-01 | GSE111253 | GEO
Project description:Purpose: Identification of core transcriptional regulatory programs and bromodomain and extraterminal (BET) protein dependency in liposarcoma (LPS) Methods: ChIP-seq and RNA-seq were performed on LPS cells. Antibodies against H3K27ac, H3K4me1, H3K4me3, RNA-Pol2, BRD2, BRD3, BRD4, FOSL2, pan-RUNX, and DDIT3 (FUS-DDIT3) were used for ChIP-seq assays. The transcriptome responses of LPS141 and MLS402 cells to OTX015 and ARV-825 were compared. Result: We generated genome-wide chromatin-state maps of LPS cells. By charting the super-enhancer structures, we identify a bromodomain and extraterminal (BET) protein-cooperated FUS-DDIT3 function in myxoid LPS and a BET protein-dependent core transcriptional regulatory circuitry consisting of FOSL2, MYC, and RUNX1 in de-differentiated LPS. This study also provides a framework for discovering and targeting of core oncogenic transcriptional programs.
2019-04-01 | GSE111252 | GEO
Project description:The bromodomain and extraterminal (BET) protein Brd4 is a validated drug target in leukemia, yet its regulatory function in this disease is not well understood. Here, we show that Brd4 chromatin occupancy in acute myeloid leukemia closely correlates with the hematopoietic transcription factors (TFs) Pu.1, Fli1, Erg, C/EBPα, C/EBPβ, and Myb at nucleosome-depleted enhancer and promoter regions. We provide evidence that these TFs, in conjunction with the lysine acetyltransferase activity of p300/CBP, facilitate Brd4 recruitment to their occupied sites to promote transcriptional activation. Moreover, chemical inhibition of BET bromodomains is found to suppress the functional output each hematopoietic TF, thereby interfering with essential lineage-specific transcriptional circuits in this disease. These findings reveal a chromatin-based signaling cascade comprised of hematopoietic TFs, p300/CBP, and Brd4, which supports leukemia maintenance and is suppressed by BET bromodomain inhibition. PolyA selected RNA-Seq for drug treated or shRNA-expressing MLL-AF9 transformed acute myeloid leukemia cells (RN2)
2015-05-01 | E-GEOD-66068 | biostudies-arrayexpress
Project description:The bromodomain and extraterminal (BET) protein Brd4 is a validated drug target in leukemia, yet its regulatory function in this disease is not well understood. Here, we show that Brd4 chromatin occupancy in acute myeloid leukemia closely correlates with the hematopoietic transcription factors (TFs) Pu.1, Fli1, Erg, C/EBPα, C/EBPβ, and Myb at nucleosome-depleted enhancer and promoter regions. We provide evidence that these TFs, in conjunction with the lysine acetyltransferase activity of p300/CBP, facilitate Brd4 recruitment to their occupied sites to promote transcriptional activation. Moreover, chemical inhibition of BET bromodomains is found to suppress the functional output each hematopoietic TF, thereby interfering with essential lineage-specific transcriptional circuits in this disease. These findings reveal a chromatin-based signaling cascade comprised of hematopoietic TFs, p300/CBP, and Brd4, which supports leukemia maintenance and is suppressed by BET bromodomain inhibition. ChIP-Seq for regulatory factors of Brd4 in MLL-AF9 transformed acute myeloid leukemia cells (RN2)
2015-05-01 | E-GEOD-66122 | biostudies-arrayexpress
Project description:Bromodomain inhibition comprises a promising therapeutic strategy in cancer, particularly for hematologic malignancies. To date, however, genomic biomarkers to direct clinical translation have been lacking. We conducted a cell-based screen of genetically-defined cancer cell lines using a prototypical inhibitor of BET bromodomains. Integration of genetic features with chemosensitivity data revealed a robust correlation between MYCN amplification and sensitivity to bromodomain inhibition. We characterized the mechanistic and translational significance of this finding in neuroblastoma, a childhood cancer with frequent amplification of MYCN. Genome-wide expression analysis demonstrated downregulation of the MYCN transcriptional program accompanied by suppression of MYCN transcription. Functionally, bromodomain-mediated inhibition of MYCN impaired growth and induced apoptosis in neuroblastoma. BRD4 knock-down phenocopied these effects, establishing BET bromodomains as transcriptional regulators of MYCN. BET inhibition conferred a significant survival advantage in three in vivo neuroblastoma models, providing a compelling rationale for developing BET bromodomain inhibitors in patients with neuroblastoma. Significance: Biomarkers of response to small-molecule inhibitors of BET bromodomains, a new compound class with promising anti-cancer activity, have been lacking. Here, we reveal MYCN amplification as a strong genetic predictor of sensitivity to BET bromodomain inhibitors, demonstrate a mechanistic rationale for this finding, and provide a translational framework for clinical trial development of BET bromodomain inhibitors for pediatric patients with MYCN-amplified neuroblastoma. JQ1 is a novel thieno-triazolo-1,4-diazepine, which displaces BET bromodomains from chromatin by competitively binding to the acetyl lysine recognition pocket. BE(2)-C and Kelly cells were treated in triplicate with 1 µM JQ1 or DMSO for 24 hours. RNA was extracted and a decrease in MYCN transcript was confirmed by real time RT-PCR as described above. The samples were profiled using the Affymetrix PrimeView Human Gene Expression Array (Affymetrix) at Beth Israel Deaconess Medical Center (Boston, MA, USA).
2013-02-25 | E-GEOD-43392 | biostudies-arrayexpress
Project description:Recent studies revealed that the bromodomain and extraterminal (BET) epigenetic reader proteins resemble key regulators in the underlying pathophysiology of cancer, diabetes or cardiovascular disease. However, whether they also regulate vascular remodeling processes by direct effects on vascular cells is unknown. In this study we investigated the effects of the BET proteins on neointima formation in response to vascular injury in vivo and on human smooth muscle cell function in vitro. In this study we showed that the selective inhibition of BETs by the small molecule (+)-JQ1 dose dependently reduced proliferation and migration of SMCs without apoptotic or toxic effects caused by cell cycle arrest in the G0/G1 phase. Whole genome microarray expression profiling analysis revealed a substantial transcriptional regulation of gene sets controlled by the FOXO1-transcription factor. Additional data confirmed that the BET protein BRD4 directly binds to FOXO1 and regulates FOXO1 transactivational capacity. Inhibition of BET epigenetic reader proteins might represent a promising therapeutic strategy to prevent adverse vascular remodeling.
2020-03-27 | GSE138323 | GEO
Project description:We report that the bromodomain and extraterminal domain (BET) inhibitor JQ1 inhibits PD-1 expression in Jurkat T cells, primary T cells, and a T cell exhaustion model. Furthermore, JQ1 dramatically impaired the expression of PD-1 and T cell immunoglobulin mucin-domain-containing-3 (Tim-3), and promoted the secretion of cytokines in T cells from patients with acute myeloid leukemia (AML).
2022-08-16 | GSE205605 | GEO
Project description:Small molecule inhibitors of the bromodomain and extraterminal (BET) family of proteins are in clinical trials for a variety of cancers, but patient selection strategies are limited. This is due in part to the heterogeneity of response following BET inhibition (BETi), which includes differentiation, senescence, and cell death in subsets of cancer cell lines. To elucidate the dominant features defining response to BETi, we carried out phenotypic and gene expression analysis of both treatment naïve cell lines and engineered tolerant lines. We found that both de novo and acquired tolerance to BET inhibition are driven by the robustness of the apoptotic response and that genetic or pharmacological manipulation of the apoptotic signaling network can modify the phenotypic response to BETi. We further identify that ordered expression of the apoptotic genes BCL2, BCL2L1, and BAD significantly predicts response to BETi. Our findings highlight the role of the apoptotic network in response to BETi, providing a molecular basis for patient stratification and combination therapies. Gene expression profiling of A375 melanoma cells or NOMO-1 AML cells treated with DMSO or the BET inhibitor, CPI203. Also, gene expression profiling of the respective derived BETi-tolerant cells treated with DMSO or CPI203.
2016-01-07 | E-GEOD-69383 | biostudies-arrayexpress