Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Synthetic lethal and resistance interactions with BET bromodomain inhibitors [ChIP-Seq]

ABSTRACT: BET bromodomain inhibitors (BBDI) are promising therapeutic agents in triple-negative breast cancer (TNBC). However, not all tumors respond and acquired resistance emerges rapidly even in the responders. Using CRISPR and small molecule inhibitor screens combined with comprehensive molecular profiling of BBDI response and resistance in TNBC cell lines, we identified numerous synthetic lethal interactions with BBDIs as well as genes that when deleted confer resistance. The most prominent and consistent synergy was observed with CDK4/6 inhibitors and paclitaxel. We also uncovered functional similarities and differences between BBD proteins BRD2, BRD4, and BRD7, whereas deletion of BRD2 and BRD4 enhances sensitivity to BBDIs, BRD7 loss leads to resistance. Lastly, single cell RNA-seq and cellular barcoding analysis of BBDI responses in sensitive and resistant cell lines highlight heterogeneity among samples and demonstrate that BBDI resistance can be both pre-existing and acquired.

ORGANISM(S): Homo sapiens

PROVIDER: GSE131097 | GEO | 2020/03/30

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Synthetic lethal and resistance interactions with BET bromodomain inhibitors [scRNA-Seq]

Project description:BET bromodomain inhibitors (BBDI) are promising therapeutic agents in triple-negative breast cancer (TNBC). However, not all tumors respond and acquired resistance emerges rapidly even in the responders. Using CRISPR and small molecule inhibitor screens combined with comprehensive molecular profiling of BBDI response and resistance in TNBC cell lines, we identified numerous synthetic lethal interactions with BBDIs as well as genes that when deleted confer resistance. The most prominent and consistent synergy was observed with CDK4/6 inhibitors and paclitaxel. We also uncovered functional similarities and differences between BBD proteins BRD2, BRD4, and BRD7, whereas deletion of BRD2 and BRD4 enhances sensitivity to BBDIs, BRD7 loss leads to resistance. Lastly, single cell RNA-seq and cellular barcoding analysis of BBDI responses in sensitive and resistant cell lines highlight heterogeneity among samples and demonstrate that BBDI resistance can be both pre-existing and acquired.

2020-03-30 | GSE131135 | GEO

Synthetic lethal and resistance interactions with BET bromodomain inhibitors [RNA-Seq]

2020-03-30 | GSE131099 | GEO

Synthetic lethal and resistance interactions with BET bromodomain inhibitors [CRISPR screen]

2020-03-30 | GSE131091 | GEO

Synthetic lethal and resistance interactions with BET bromodomain inhibitors [Barcode_seq]

2020-03-30 | GSE131030 | GEO

Synthetic lethal and resistance interactions with BET bromodomain inhibitors [ATAC-Seq]

2020-03-30 | GSE131026 | GEO

Response and resistance to BET bromodomain inhibitors in triple negative breast cancer [ChIP-Seq]

Project description:Triple negative breast cancer (TNBC) is a heterogeneous and clinically aggressive disease for which there is no targeted therapy. Here we report the preferential and high sensitivity of TNBCs to BET bromodomain inhibitors such as JQ1 manifested by cell cycle arrest in early G1, apoptosis, and induction of markers of luminal epithelial differentiation in vitro and in vivo. The sensitivity of TNBC and other tumor types to BET inhibition establishes a rationale for clinical investigation, and a motivation to understand mechanisms of resistance. After engendering acquired resistance to BET inhibition in previously sensitive TNBCs, we utilized integrative approaches to identify a unique mechanism of epigenomic resistance to this epigenetic therapy. Resistant cells remain dependent on BRD4, confirmed by RNA interference. However, TNBC cells adapt to BET bromodomain inhibition by re-recruitment of unmutated BRD4 to super-enhancers, now in a bromodomain-independent manner. Proteomic studies of resistant TNBC identify hyper-phosphorylation of BRD4 and strong association with MED1. Together, these studies provide a rationale for BET inhibition in TNBC and argue for combination strategies to anticipate clinical drug resistance. ChIP-seq in parental and JQ1 resistant triple negative breast cancer (TNBC) in response to DMSO or JQ1 treatment

2016-01-07 | E-GEOD-63581 | biostudies-arrayexpress

Response and resistance to BET bromodomain inhibitors in triple negative breast cancer [Chem-Seq]

Project description:Triple negative breast cancer (TNBC) is a heterogeneous and clinically aggressive disease for which there is no targeted therapy. Here we report the preferential and high sensitivity of TNBCs to BET bromodomain inhibitors such as JQ1 manifested by cell cycle arrest in early G1, apoptosis, and induction of markers of luminal epithelial differentiation in vitro and in vivo. The sensitivity of TNBC and other tumor types to BET inhibition establishes a rationale for clinical investigation, and a motivation to understand mechanisms of resistance. After engendering acquired resistance to BET inhibition in previously sensitive TNBCs, we utilized integrative approaches to identify a unique mechanism of epigenomic resistance to this epigenetic therapy. Resistant cells remain dependent on BRD4, confirmed by RNA interference. However, TNBC cells adapt to BET bromodomain inhibition by re-recruitment of unmutated BRD4 to super-enhancers, now in a bromodomain-independent manner. Proteomic studies of resistant TNBC identify hyper-phosphorylation of BRD4 and strong association with MED1. Together, these studies provide a rationale for BET inhibition in TNBC and argue for combination strategies to anticipate clinical drug resistance. Chem-Seq in parental and JQ1 resistant triple negative breast cancer (TNBC)

2016-01-07 | E-GEOD-63284 | biostudies-arrayexpress

Response and resistance to BET bromodomain inhibitors in triple negative breast cancer [RNA-Seq]

Project description:Triple negative breast cancer (TNBC) is a heterogeneous and clinically aggressive disease for which there is no targeted therapy. Here we report the preferential and high sensitivity of TNBCs to BET bromodomain inhibitors such as JQ1 manifested by cell cycle arrest in early G1, apoptosis, and induction of markers of luminal epithelial differentiation in vitro and in vivo. The sensitivity of TNBC and other tumor types to BET inhibition establishes a rationale for clinical investigation, and a motivation to understand mechanisms of resistance. After engendering acquired resistance to BET inhibition in previously sensitive TNBCs, we utilized integrative approaches to identify a unique mechanism of epigenomic resistance to this epigenetic therapy. Resistant cells remain dependent on BRD4, confirmed by RNA interference. However, TNBC cells adapt to BET bromodomain inhibition by re-recruitment of unmutated BRD4 to super-enhancers, now in a bromodomain-independent manner. Proteomic studies of resistant TNBC identify hyper-phosphorylation of BRD4 and strong association with MED1. Together, these studies provide a rationale for BET inhibition in TNBC and argue for combination strategies to anticipate clinical drug resistance. RNA-Seq in parental and JQ1 resistant triple negative breast cancer (TNBC) in response to DMSO or JQ1 treatment over time

2016-01-07 | E-GEOD-63582 | biostudies-arrayexpress

Response and resistance to BET bromodomain inhibitors in triple negative breast cancer [RNA-Seq]

2016-01-07 | GSE63582 | GEO

Response and resistance to BET bromodomain inhibitors in triple negative breast cancer [ChIP-Seq]

2016-01-07 | GSE63581 | GEO