CREPT is required for the metastasis of triple-negative breast cancer through a co-operational-chromatin loop-based gene regulation
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View abstract on PubMed
Summary
This summary is machine-generated.CREPT/RPRD1B drives aggressive triple-negative breast cancer (TNBC) metastasis by altering genome structure. Targeting CREPT disrupts these changes, offering a potential therapy for TNBC.
Area Of Science
- Oncology
- Molecular Biology
- Genomics
Background
- Triple-negative breast cancer (TNBC) is highly aggressive, with metastasis mechanisms poorly understood.
- Somatic gene copy-number amplifications and elevated expression of CREPT/RPRD1B are observed in TNBC.
- CREPT/RPRD1B expression correlates with poor patient survival and is implicated in TNBC metastasis.
Purpose Of The Study
- To investigate the role of CREPT/RPRD1B in TNBC metastasis.
- To elucidate the molecular mechanisms by which CREPT/RPRD1B promotes metastasis.
- To evaluate CREPT/RPRD1B as a therapeutic target for metastatic TNBC.
Main Methods
- Analysis of gene copy-number and expression data in TNBC.
- Demonstration of CREPT/RPRD1B's effect on three-dimensional genome structure (TADs, chromatin loops).
- Validation of chromatin loops using HiChIP and Tn5-FISH.
- CRISPR-dCas9 to disrupt chromatin loops and AAV-based shRNA to deplete CREPT in mouse models.
Main Results
- CREPT/RPRD1B amplifications and elevated expression are linked to poor TNBC patient survival.
- CREPT/RPRD1B alters 3D genome organization, mediating 1082 co-operational chromatin loops.
- These loops enhance metastatic gene expression by orchestrating RNAPII activity.
- Disrupting these loops or depleting CREPT suppresses TNBC metastasis in vivo.
Conclusions
- CREPT/RPRD1B is a key driver of TNBC metastasis through 3D genome structural alterations.
- Targeting CREPT/RPRD1B to disrupt these aberrant chromatin loops presents a novel therapeutic strategy.
- This approach holds promise for treating patients with metastatic triple-negative breast cancer.
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