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Squamous trans-differentiation of pancreatic cancer cells promotes stromal inflammation

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Mus musculus Homo sapiens

PROVIDER: GSE140484 | GEO | 2020/04/27

REPOSITORIES: GEO

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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 (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.

2020-04-27 | GSE140481 | GEO

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

2020-04-27 | GSE140482 | GEO

Squamous trans-differentiation of pancreatic cancer cells promotes stromal inflammation

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

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

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

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Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

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