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FOXA2/AP-1 drives prostate cancer lineage plasticity

ABSTRACT: FOXA2/AP-1 drives prostate cancer lineage plasticity

PROVIDER: PRJNA972713 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR24572400_1.fastq.gz	Fastqsanger.gz
	SRR24572400_2.fastq.gz	Fastqsanger.gz
	SRR24572500.fastq.gz	Fastqsanger.gz
	SRR24572401_1.fastq.gz	Fastqsanger.gz
	SRR24572401_2.fastq.gz	Fastqsanger.gz

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Project description:FOXA (Forkhead Box Protein A) family proteins function as pioneer transcription factors by loosening the compact chromatin structure and facilitating access for other transcription factors. The role of FOXA1 has been intensively studied in normal prostate epithelial cells and the adenocarcinoma subtype of prostate cancer (PCa) where it acts as a critical pioneer factor for the chromatin binding of androgen receptor (AR). Recent studies have indicated the emergence of FOXA2 as an adaptive response to AR signaling inhibition, particularly in prostate tumors that have undergone lineage reprogramming to a neuroendocrine PCa subtype. However, the molecular basis for this transition from FOXA1 to FOXA2 and its role in regulating the development of PCa lineage plasticity remains unclear. In this study, we show that FOXA2 binds to distinct chromatin regions in multiple AR-null PCa models with different molecular subtypes and that its binding is dependent on an epigenetic factor, LSD1. More importantly, we demonstrate that FOXA2 can function as a major pioneer factor of JUN and govern the chromatin binding of AP-1 complex in PCa exhibiting lineage plasticity. Mechanistically, differential reprogramming of JUN activates lineage-specific super-enhancers that may promote PCa progression by enhancing cell state transitions to multiple lineages. Overall, our study reveals a pivotal function of the LSD1-FOXA2 axis in rewiring AP-1 to induce differential transcriptional reprogramming required for PCa lineage plasticity.

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