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Three quarters of all breast cancer cases express the estrogen receptor (ER, ESR1 gene), which promotes tumor growth and constitutes a direct target for endocrine therapies. ESR1 mutations have been implicated in therapy resistance in metastatic breast cancers, in particular to aromatase inhibitors....
ORGANISM(S): Homo sapiens (Human) 
2024-03-26 | PXD032404 | Pride
Three quarters of all breast cancer cases express the estrogen receptor (ER, ESR1 gene), which promotes tumor growth and constitutes a direct target for endocrine therapies. ESR1 mutations have been implicated in therapy resistance in metastatic breast cancers, in particular to aromatase inhibitors....
ORGANISM(S): Homo sapiens (Human) 
2024-03-26 | PXD032369 | Pride
Targeting ESR1 mutation-induced transcriptional addiction with BET inhibition
End-stage breast cancers are clonally heterogeneous and harbor many poorly-understood treatment resistance mechanisms. We therefore established multiple Patient-Derived-Xenograft (PDX) models to study genomic events driving advanced disease. Comparative whole-genome sequencing of paired primary tu...
ORGANISM(S): Homo sapiens 
Estrogen receptor-α (ERα) is an important driver of breast cancer and is the target for hormonal therapies, anti-estrogens and drugs that limit estrogen biosynthesis (aromatase inhibitors). Mutations in the ESR1 gene identified in metastatic breast cancer provide a potential mechanism for acquired...
ORGANISM(S): Homo sapiens 
Estrogen receptor-α (ERα) is an important driver of breast cancer and is the target for hormonal therapies, anti-estrogens and drugs that limit estrogen biosynthesis (aromatase inhibitors). Mutations in the ESR1 gene identified in metastatic breast cancer provide a potential mechanism for acquired...
ORGANISM(S): Homo sapiens 
We investigated the therapeutic potential of BET inhibition to target ESR1 mutation-induced “transcriptional addiction” in ER-positive breast cancer. Our studies show that ESR1 mutant (Y537S and D538G) cells activate unique transcriptional programs that are targeted by OTX015, a BET inhibitor
ORGANISM(S): Homo sapiens 
2022-06-18 | GSE206185 | GEO
MCF-7 cells long-term treated with Fulv plus Abema acquired ESR1 Y537S mutation and exhibited defective RSR and DDR
MCF-7 ESR1 drug response scRNA
MCF-7 ESR1 drug response bulk RNA
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