Clinical perspectives of BET inhibition in ovarian cancer
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Updated: Nov 20, 2025

Evaluating the Angiogenetic Properties of Ovarian Cancer Stem-Like Cells using the Three-Dimensional Co-Culture System, NICO-1
Published on: December 5, 2020
Angeliki Andrikopoulou1,2, Michalis Liontos1,2, Konstantinos Koutsoukos1,2
1Department of Clinical Therapeutics, Alexandra Hospital, National and Kapodistrian University of Athens, 11528, Athens, Greece.
Background:
Bromodomain and extra-terminal (BET) proteins are epigenetic readers that bind to acetylated lysines of histones and regulate gene transcription. BET protein family members mediate the expression of various oncogenic drivers in ovarian cancer, such as the MYC and Neuregulin 1 (NRG1) genes. BRD4, the most thoroughly studied member of the BET family, is amplified in a significant subset of high-grade serous carcinomas (HGSC) of the ovary. It has been reported that BET inhibitors can attenuate the proliferation and dissemination of ovarian cancer cells by inhibiting oncogenic pathways, such as the FOXM1 and JAK/STAT pathways. BET inhibition can re-sensitize resistant ovarian cancer cells to already approved anticancer agents, including cisplatin and PARP inhibitors. This synergism was also confirmed in vivo in animal models. These and other preclinical results provide a promising basis for the application of BET inhibitors in ovarian cancer treatment. Currently, Phase I/II clinical trials explore the safety and efficacy profiles of BET inhibitors in various solid tumors, including ovarian tumors. Here, we review current knowledge on the molecular effects and preclinical activities of BET inhibitors in ovarian tumors.
Conclusions:
BET proteins have emerged as new druggable targets for ovarian cancer. BET inhibitors may enhance antitumor activity when co-administered with conventional treatment regimens. Results from ongoing Phase I/II studies are anticipated to confirm this notion.
Insights
Bromodomain and extra-terminal (BET) inhibitors show promise for ovarian cancer treatment by targeting oncogenic pathways. These inhibitors may resensitize resistant cancer cells to existing therapies, with ongoing clinical trials expected to confirm their efficacy.
Area of Science:
- Epigenetics
- Molecular Oncology
- Pharmacology
Background:
- Bromodomain and extra-terminal (BET) proteins are epigenetic readers regulating gene transcription, including oncogenic drivers like MYC and Neuregulin 1 (NRG1) in ovarian cancer.
- BRD4 amplification is observed in high-grade serous carcinomas (HGSC) of the ovary.
- BET inhibitors have demonstrated potential in preclinical models to inhibit ovarian cancer cell proliferation and dissemination.
Purpose of the Study:
- To review the molecular effects of BET inhibitors in ovarian tumors.
- To summarize preclinical activities of BET inhibitors in ovarian cancer.
- To discuss the potential of BET inhibitors as a therapeutic strategy for ovarian cancer.
Main Methods:
- Review of existing literature on BET inhibitors and ovarian cancer.
- Analysis of preclinical data on BET inhibitor efficacy.
- Summary of ongoing clinical trials for BET inhibitors in ovarian cancer.
Main Results:
- BET inhibitors attenuate ovarian cancer cell proliferation and dissemination by inhibiting pathways like FOXM1 and JAK/STAT.
- BET inhibition can re-sensitize cisplatin- and PARP inhibitor-resistant ovarian cancer cells.
- Preclinical studies, including in vivo animal models, support the efficacy of BET inhibitors.
Conclusions:
- BET proteins represent novel druggable targets for ovarian cancer therapy.
- Co-administration of BET inhibitors with conventional treatments may enhance antitumor activity.
- Ongoing Phase I/II clinical trials are crucial for validating these findings.
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