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HOXB13 epigenome in castration-resistant prostate cancer

ABSTRACT: HOXB13 epigenome in castration-resistant prostate cancer

PROVIDER: PRJNA715287 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR13995147.fastq.gz	Fastqsanger.gz
	SRR13995148.fastq.gz	Fastqsanger.gz
	SRR13995149.fastq.gz	Fastqsanger.gz
	SRR13995150.fastq.gz	Fastqsanger.gz
	SRR13995151.fastq.gz	Fastqsanger.gz

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HOXB13 epigenome in castration-resistant prostate cancer

Project description:Treatment induced-resistance of CRPC is an imminent undesirable outcome in patients. Tissue and lineage-specific super-enhancers (SEs) determine cell fate and plasticity during development and disease respectively. However, the identity and function of CRPC-specific SEs (CSEs) regulated genes is unknown. Herein we report the lysine 13 acetylation of the prostate-enriched transcription factor HOXB13 (acK13-HOXB13) mediated by the histone acetyl transferase (HAT) CBP/p300 as a critical mechanism of CSE establishment. Mechanistically, acK13-HOXB13 establishes the CRPC enhanceosome comprising chromatin remodeling bromo-domain proteins SMARCA2/BAZ2B and the HAT p300/CBP which enable histone and non-histone protein acetylation at CSEs. Such CSEs sprout at tyrosine kinase genes encoding ACK1/TNK2, VEGFA, and ANGPT2/ANGPTL3 to increase pathogenic output in primary human tumors. These tyrosine kinase mediated signaling cascades establish robust networks to conduce growth, survival and androgen-bypass. Consistently, the loss of function acK13-HOXB13 mutants show significant reduction of proliferation, spheroid formation, and xenograft tumor growth that correlates with the high sensitivity to the AR-antagonist Enzalutamide. Targeting HOXB13 acetylation mediated CRPC-SE establishment at critical tyrosine kinase genes could therefore have significant clinical implications in preventing PC recurrence.

2022-09-22 | GSE169132 | GEO

Diverse AR-V7 cistromes in castration-resistant prostate cancer are governed by HoxB13

Project description:The constitutively active androgen receptor (AR) splice variant 7 (AR-V7) plays an important role in the progression of castration-resistant prostate cancer (CRPC). Although biomarker studies established the role of AR-V7 in resistance to AR-targeting therapies, how AR-V7 mediates genomic functions in CRPC remains largely unknown. Using a ChIP-exo approach, we show AR-V7 binds to distinct genomic regions and recognizes a full-length androgen-responsive element in CRPC cells and patient tissues. Remarkably, we find dramatic differences in AR-V7 cistromes across diverse CRPC cells and patient tissues, regulating different target gene sets involved in CRPC progression. Surprisingly, we discover that HoxB13 is universally required for and colocalizes with AR-V7 binding to open chromatin across CRPC genomes. HoxB13 pioneers AR-V7 binding through direct physical interaction, and collaborates with AR-V7 to up-regulate target oncogenes. Transcriptional coregulation by HoxB13 and AR-V7 was further supported by their coexpression in tumors and circulating tumor cells from CRPC patients. Importantly, HoxB13 silencing significantly decreases CRPC growth through inhibition of AR-V7 oncogenic function. These results identify HoxB13 as a pivotal upstream regulator of AR-V7-driven transcriptomes that are often cell context-dependent in CRPC, suggesting that HoxB13 may serve as a therapeutic target for AR-V7-driven prostate tumors.

2018-05-31 | GSE99378 | GEO

HOXB13 lysine 13 acetylation regulated transcriptional targets in castration-resistant prostate cancer

Project description:HOXB13 lysine 13 acetylation regulated transcriptional targets in castration-resistant prostate cancer

| PRJNA731930 | ENA

Targeted Escalation of Tyrosine Kinase Super-Enhancer Network Engineered by Acetylated HOXB13 Spurs Prostate Tumor Autonomy

Project description:While tissue and lineage-specific super-enhancers (SEs) regulate cell fate decision during development, the nature of Castration Resistant Prostate Cancer (CRPC)-specific SEs (CSEs) is unknown. Herein we report the lysine 13 (K13) acetylation of HOXB13 mediated by the histone acetyltransferase CBP/p300 regulates prostate tumor autonomy. The acK13-HOXB13 shadows H3K27ac at lineage specific SEs and surpasses it at CSEs. In contrast, mutation of HOXB13 at K13 sensitizes CRPCs to Enzalutamide, disables spheroid and xenograft tumor formation. Mechanistically, the acK13-HOXB13 interacts with chromatin remodeling bromodomain proteins to regulate tumor-specific CSE selection. These CSEs sprout at critical lineage genes NKX3-1, Androgen receptor (AR), AR regulator ACK1 tyrosine kinase and tyrosine kinase ligands regulating angiogenesis. Single-cell transcriptomic analysis of human prostate tumor organoids reveal ACK1 expression underlies sensitivity to the small molecule inhibitor (R)-9b over AR-targeted agents. Collectively, our studies reveal acK13-HOXB13 regulated epigenome as a key cog in prostate cancer cell autonomy.

2022-09-22 | GSE167506 | GEO

Expression data from Hoxb13+ Prostate Luminal Epithelial Cells

Project description:A subpopulation of prostate luminal epithelial cells has been previously reported to be sufficient to regenerate prostatic architecture following consecutive rounds of androgen deprivation/repletion. This functional characteristic suggest prostate luminal epithelial cells as the putative cell-of-origin for castration-resistant prostate cancer - which more notizable fenotype is the lack of response to androgen deprivation thereapy. We used microarrays to profile the androgen-induced transcripts in luminal prostate epithelial cells involved in a cycle of prostate regression/regeneration in Hoxb13-rtTA|TetO-H2BGFP transgenic mice.

2021-04-06 | GSE171490 | GEO

Targeted Escalation of an Acetylated HOXB13-dependent Tyrosine Kinase Super-Enhancer Network Promotes Prostate Tumor Autonomy

Project description:While tissue and lineage-specific super-enhancers (SEs) regulate cell fate decision during development, the nature of Castration Resistant Prostate Cancer (CRPC)-specific SEs (CSEs) that drive resistance to AR-targeted therapies is unknown. Herein we report the lysine 13 (K13)-acetylation of Homeodomain transcription factor HOXB13 as a critical feature underlying CSE exclusivity. The histone acetyltransferase (HAT) CBP/p300 specifically acetylates HOXB13 (acK13-HOXB13) in prostate cancer cells. The acK13-HOXB13 enriched CSEs sprout at critical lineage genes such as the NKX3-1, Androgen receptor (AR), AR regulator ACK1/TNK2 a tyrosine-kinase and tyrosine kinase ligands associated with angiogenesis, including VEGFA and ANGPT2/ANGPTL3 to expedite prostate tumor autonomy.

2022-09-22 | GSE169133 | GEO

Mitoribosome sensitivity to HSP70 inhibition uncovers metabolic liabilities of castration-resistant prostate cancer

Project description:TMT-MS of whole cell lysate collected from 22Rv1 castration-resistant prostate cancer cells treated with 5 µM JG-98 for 4 hours.

2023-04-25 | PXD038684 | JPOST Repository

A whole-blood RNA transcript based prognostic model in castration-resistant prostate cancer

Project description:Peripheral blood from 62 men with castration resistant prostate cancer was collected between 8/2006 and 6/2008. A panel of 168 inflammation-related and prostate cancer related genes was assessed with quantitative PCR to assess biomarkers predictive of survival. qPCR profiling of whole blood from patients with castration-resistant prostate cancer.

2013-04-02 | E-GEOD-45705 | biostudies-arrayexpress

A landscape of circular RNAs expression in the castration-resistant prostate cancer

Project description:Prostate cancer is one of the major cancers that seriously affect men's health. It has high morbidity and high mortality, but there is still no ideal molecular markers for the diagnosis and prognosis of prostate cancer. Castration-resistant prostate cancer is associated with wide variations in survival. To determine whether differentially expressed circRNAs in plasma exosomes can be used as a novel biomarker for castration-resistant prostate cancer prognosis, we performed high-throughput circRNA sequencing on 15 pairs of plasma exosomes from 30 metastatic castration-resistant prostate cancer patients, with or without early progression, to screen differentially expressed circRNAs.

2023-04-05 | GSE125256 | GEO

HOXB13 inhibits lipid metabolism through HDAC3-mediated epigenetic reprogramming [RNA-Seq]

Project description:HOXB13 is a homeodomain transcription factor with prostate-specific expression. It is essential for normal prostate epithelium differentiation during development and functions as a key regulator of androgen-dependent cell growth in adult and cancerous prostate. Previous studies have demonstrated that HOXB13 is a pioneer factor of the androgen receptor (AR) and also a critical cofactor of AR variant v7 in castration-resistant prostate cancer (PCa). However, the intrinsic function of HOXB13 as a DNA-binding protein in an AR-independent context has not been elucidated. Here, our data reveal HOXB13, but not G84E mutant, recruits HDAC3 to specific genomic regions to catalyze histone de-acetylation and chromatin remodeling. We demonstrate a predominant function of HOXB13 in transcriptional repression of lipogenic genes requiring HDAC3.

2022-04-01 | GSE153585 | GEO

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