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Squamous trans-differentiation of pancreatic cancer cells promotes stromal inflammation (ChIP-seq)

ABSTRACT: Squamous trans-differentiation of pancreatic cancer cells promotes stromal inflammation (ChIP-seq)

PROVIDER: PRJNA589902 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR10466226.fastq.gz	Fastqsanger.gz
	SRR10466227.fastq.gz	Fastqsanger.gz
	SRR10466228.fastq.gz	Fastqsanger.gz
	SRR10466229.fastq.gz	Fastqsanger.gz

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Squamous trans-differentiation of pancreatic cancer cells promotes stromal inflammation

Project description:Squamous trans-differentiation of pancreatic cancer cells promotes stromal inflammation

| PRJNA589900 | ENA

Squamous trans-differentiation of pancreatic cancer cells promotes stromal inflammation (ChIP-seq)

Project description:A highly aggressive subset of pancreatic ductal adenocarcinomas undergo trans-differentiation into the squamous lineage during disease progression. While the tumorigenic consequences of this aberrant cell fate transition are poorly understood, recent studies have identified a role for the master regulator TP63 in this process. Here, we investigated whether squamous trans- differentiation of pancreatic cancer cells can influence the phenotype of non-neoplastic cells in the tumor microenvironment. Conditioned media experiments revealed that squamous-subtype pancreatic cancer cells secrete factors that convert quiescent pancreatic stellate cells into a specialized subtype of cancer-associated fibroblasts (CAFs) that express inflammatory genes at high levels. We use gain- and loss-of-function approaches in vivo to show that squamous-subtype pancreatic tumor models become enriched with inflammatory CAFs and neutrophils in a TP63- dependent manner. These non cell-autonomous effects occur, at least in part, through TP63- mediated activation of enhancers at pro-inflammatory cytokine loci, which includes IL1A as a key target. Taken together, our findings reveal enhanced tissue inflammation as a consequence of squamous trans-differentiation in pancreatic cancer, thus highlighting an instructive role of tumor cell lineage in reprogramming the stromal microenvironment.

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Squamous trans-differentiation of pancreatic cancer cells promotes stromal inflammation (RNA-seq)

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Squamous trans-differentiation of pancreatic cancer cells promotes stromal inflammation (RNA-seq)

Project description:Squamous trans-differentiation of pancreatic cancer cells promotes stromal inflammation (RNA-seq)

| PRJNA589903 | ENA

Squamous trans-differentiation of pancreatic cancer cells promotes stromal inflammation.

Project description:A highly aggressive subset of pancreatic ductal adenocarcinomas undergo trans-differentiation into the squamous lineage during disease progression. Here, we investigated whether squamous trans-differentiation of human and mouse pancreatic cancer cells can influence the phenotype of non-neoplastic cells in the tumor microenvironment. Conditioned media experiments revealed that squamous pancreatic cancer cells secrete factors that recruit neutrophils and convert pancreatic stellate cells into cancer-associated fibroblasts (CAFs) that express inflammatory cytokines at high levels. We use gain- and loss-of-function approaches to show that squamous-subtype pancreatic tumor models become enriched with neutrophils and inflammatory CAFs in a p63-dependent manner. These effects occur, at least in part, through p63-mediated activation of enhancers at pro-inflammatory cytokine loci, which includes IL1A and CXCL1 as key targets. Taken together, our findings reveal enhanced tissue inflammation as a consequence of squamous trans-differentiation in pancreatic cancer, thus highlighting an instructive role of tumor cell lineage in reprogramming the stromal microenvironment.

| S-EPMC7200154 | biostudies-literature

Squamous trans-differentiation of pancreatic cancer cells promotes stromal inflammation

Project description:This SuperSeries is composed of the SubSeries listed below.

2020-04-27 | GSE140484 | GEO

Histological Pattern of Tumor Inflammation and Stromal Density Correlate with Patient’s Demographics and Immuno-Oncologic Transcriptional Profile in Oral Squamous Cell Carcinoma

Project description:The aim of this work is to demonstrate the correlation of Oral Squamous Cell Carcinoma (OSCC) tumor inflammation and stromal density with patient demographics and with the differential gene expression (DGE) analysis of 8 OSCC tumor tissue. Using the IO-360 nanoString platform, we showed that at a transcriptional level, decreased cytokine signaling and activation of oncogenic pathways were observed in immune excluded tumors and absence of peritumoral stromal inflammation. Smokers, and males correlated with decreased global levels of immune cells and predominance of myeloid populations.

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TP63-mediated enhancer reprogramming drives the squamous subtype of pancreatic ductal adenocarcinoma

Project description:The aberrant expression of squamous lineage markers in pancreatic ductal adenocarcinoma (PDA) has been correlated with poor clinical outcomes. However, the functional role of this putative trans-differentiation event in PDA pathogenesis remains unclear. Here, we show that expression of the transcription factor TP63 (ΔN isoform) is sufficient to install and sustain the enhancer landscape and transcriptional signature of the squamous lineage in human PDA cells. In addition, we demonstrate that TP63-driven enhancer reprogramming promotes aggressive tumor phenotypes, including enhanced cell motility and invasion and an accelerated growth of primary PDA tumors and metastases in vivo. Conversely, we provide evidence that squamous PDA remains addicted to TP63 to sustain the growth of primary tumors and metastases. Taken together, our study validates the functional significance of squamous trans-differentiation in PDA, and reveals TP63-based reprogramming of PDA cells as an experimental tool for investigating vulnerabilities linked to this cell fate transition.

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TP63-mediated enhancer reprogramming drives the squamous subtype of pancreatic ductal adenocarcinoma (RNA-seq)

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TP63-mediated enhancer reprogramming drives the squamous subtype of pancreatic ductal adenocarcinoma (ChIP-seq)

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