Similar Datasets
Project description:Prostate cancer is driven by oncogenic transcription factor enhanceosomes comprising chromatin and epigenetic regulators. The lysine acetyltransferases p300 and CBP are key cofactors that activate enhancers through histone acetylation. Here, we identify p300/CBP-mediated multisite acetylation of the histone H2B N-terminus (H2BNTac) as a defining feature of oncogenic enhanceosomes in androgen receptor (AR)-positive prostate cancer. p300/CBP are essential for AR and ERG transcriptional activity, and their dual degradation eliminates H2BNTac and H3K27ac marks at hyperactive enhancers more effectively than targeting either paralog or bromodomains alone. Cytotoxicity profiling across >900 cell lines revealed that tumors with high H2BNTac, including AR-positive prostate cancer, are selectively dependent on p300/CBP. In preclinical models, systemic p300/CBP degradation inhibited tumor growth, synergized with AR antagonists, and showed no evident toxicity. These findings position H2BNTac as a key epigenetic marker of enhancer addiction and support dual p300/CBP degradation as a promising therapy for enhancer-driven cancers.
2025-07-28 | PXD065292 | Pride
Project description:Prostate cancer is driven by oncogenic transcription factor enhanceosomes comprising chromatin and epigenetic regulators. The lysine acetyltransferases p300 and CBP are key cofactors that activate enhancers through histone acetylation. Here, we identify p300/CBP-mediated multisite acetylation of the histone H2B N-terminus (H2BNTac) as a defining feature of oncogenic enhanceosomes in androgen receptor (AR)-positive prostate cancer. p300/CBP are essential for AR and ERG transcriptional activity, and their dual degradation eliminates H2BNTac and H3K27ac marks at hyperactive enhancers more effectively than targeting either paralog or bromodomains alone. Cytotoxicity profiling across >900 cell lines revealed that tumors with high H2BNTac, including AR-positive prostate cancer, are selectively dependent on p300/CBP. In preclinical models, systemic p300/CBP degradation inhibited tumor growth, synergized with AR antagonists, and showed no evident toxicity. These findings position H2BNTac as a key epigenetic marker of enhancer addiction and support dual p300/CBP degradation as a promising therapy for enhancer-driven cancers.
2025-07-28 | PXD065228 | Pride
Project description:Prostate cancer (PCa) is driven by oncogenic transcription factor enhanceosomes comprising chromatin and epigenetic regulators. The lysine acetyltransferases p300 and CBP are key cofactors that activate enhancers through histone acetylation. Here, we identify p300/CBP-mediated multisite acetylation of the histone H2B N-terminus (H2BNTac) as a defining feature of oncogenic enhanceosomes in androgen receptor (AR)-positive prostate cancerPCa. p300/CBP are essential for AR and ERG transcriptional activity, and their dual degradation eliminates H2BNTac and H3K27ac marks at hyperactive enhancers, leading to stronger suppression of oncogenic transcription more effectively than targeting either paralog or bromodomains alone. Cytotoxicity profiling across >900 cell lines revealed that tumors with high H2BNTac, including AR-positive prostate cancerPCa, are selectively dependent on p300/CBP. In preclinical models, systemic p300/CBP degradation inhibited tumor growth, synergized with AR antagonists, and showed no evident toxicity. These findings position H2BNTac as an key epigenetic marker of enhancer addiction and establish support dual p300/CBP degradation as a promising therapeutic strategypy for enhancer-driven cancers.
2025-06-26 | GSE255133 | GEO
Project description:Prostate cancer (PCa) is driven by oncogenic transcription factor enhanceosomes comprising chromatin and epigenetic regulators. The lysine acetyltransferases p300 and CBP are key cofactors that activate enhancers through histone acetylation. Here, we identify p300/CBP-mediated multisite acetylation of the histone H2B N-terminus (H2BNTac) as a defining feature of oncogenic enhanceosomes in androgen receptor (AR)-positive prostate cancerPCa. p300/CBP are essential for AR and ERG transcriptional activity, and their dual degradation eliminates H2BNTac and H3K27ac marks at hyperactive enhancers, leading to stronger suppression of oncogenic transcription more effectively than targeting either paralog or bromodomains alone. Cytotoxicity profiling across >900 cell lines revealed that tumors with high H2BNTac, including AR-positive prostate cancerPCa, are selectively dependent on p300/CBP. In preclinical models, systemic p300/CBP degradation inhibited tumor growth, synergized with AR antagonists, and showed no evident toxicity. These findings position H2BNTac as an key epigenetic marker of enhancer addiction and establish support dual p300/CBP degradation as a promising therapeutic strategypy for enhancer-driven cancers.
2025-06-26 | GSE255132 | GEO
Project description:Prostate cancer (PCa) is driven by oncogenic transcription factor enhanceosomes comprising chromatin and epigenetic regulators. The lysine acetyltransferases p300 and CBP are key cofactors that activate enhancers through histone acetylation. Here, we identify p300/CBP-mediated multisite acetylation of the histone H2B N-terminus (H2BNTac) as a defining feature of oncogenic enhanceosomes in androgen receptor (AR)-positive prostate cancerPCa. p300/CBP are essential for AR and ERG transcriptional activity, and their dual degradation eliminates H2BNTac and H3K27ac marks at hyperactive enhancers, leading to stronger suppression of oncogenic transcription more effectively than targeting either paralog or bromodomains alone. Cytotoxicity profiling across >900 cell lines revealed that tumors with high H2BNTac, including AR-positive prostate cancerPCa, are selectively dependent on p300/CBP. In preclinical models, systemic p300/CBP degradation inhibited tumor growth, synergized with AR antagonists, and showed no evident toxicity. These findings position H2BNTac as an key epigenetic marker of enhancer addiction and establish support dual p300/CBP degradation as a promising therapeutic strategypy for enhancer-driven cancers.
2025-06-26 | GSE255131 | GEO
Project description:Targeting histone H2B acetylated enhanceosomes via p300/CBP degradation in prostate cancer
| PRJNA1073574 | ENA
Project description:Targeting histone H2B acetylated enhanceosomes via p300/CBP degradation in prostate cancer (ChIP-Seq)
| PRJNA1073576 | ENA
Project description:Targeting histone H2B acetylated enhanceosomes via p300/CBP degradation in prostate cancer (RNA-Seq)
| PRJNA1073579 | ENA
Project description:Targeting histone H2B acetylated enhanceosomes via p300/CBP degradation in prostate cancer (ATAC-Seq)
| PRJNA1073577 | ENA
Project description:Resistance to androgen receptor (AR) blockade in castration-resistant prostate cancer (CRPC) is associated with sustained AR signaling, including through alternative splicing of AR (AR-SV). Inhibitors of transcriptional coactivators that regulate AR activity, including the paralog histone acetyltransferase proteins p300 and CBP, are attractive therapeutic targets for lethal prostate cancer. Herein, we validate targeting p300/CBP as a therapeutic strategy for lethal prostate cancer and describe CCS1477, a novel small-molecule inhibitor of the p300/CBP conserved bromodomain. We show that CCS1477 inhibits cell proliferation in prostate cancer cell lines and decreases AR- and C-MYC-regulated gene expression. In AR-SV-driven models, CCS1477 has antitumor activity, regulating AR and C-MYC signaling. Early clinical studies suggest that CCS1477 modulates KLK3 blood levels and regulates CRPC biopsy biomarker expression. Overall, CCS1477 shows promise for the treatment of patients with advanced prostate cancer. SIGNIFICANCE: Treating CRPC remains challenging due to persistent AR signaling. Inhibiting transcriptional AR coactivators is an attractive therapeutic strategy. CCS1477, an inhibitor of p300/CBP, inhibits growth and AR activity in CRPC models, and can affect metastatic CRPC target expression in serial clinical biopsies.See related commentary by Rasool et al., p. 1011.This article is highlighted in the In This Issue feature, p. 995.
| S-EPMC8102310 | biostudies-literature