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Differential Activity of MAPK signalling Defines Fibroblast Subtypes in Pancreatic Cancer

ABSTRACT: Differential Activity of MAPK signalling Defines Fibroblast Subtypes in Pancreatic Cancer

PROVIDER: PRJNA1032959 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26552220_1.fastq.gz	Fastqsanger.gz
	SRR26552220_2.fastq.gz	Fastqsanger.gz
	SRR26552221_1.fastq.gz	Fastqsanger.gz
	SRR26552221_2.fastq.gz	Fastqsanger.gz
	SRR26552222_1.fastq.gz	Fastqsanger.gz

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Differential Activity of MAPK signalling Defines Fibroblast Subtypes in Pancreatic Cancer (RNA-Seq)

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Differential Activity of MAPK signalling Defines Fibroblast Subtypes in Pancreatic Cancer (Spatial Transcriptomics)

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Differential Activity of MAPK signalling Defines Fibroblast Subtypes in Pancreatic Cancer (scRNA-Seq)

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Differential Activity of MAPK signalling Defines Fibroblast Subtypes in Pancreatic Cancer (Spatial Transcriptomics)

Project description:Fibroblast heterogeneity is increasingly recognised across cancer conditions. Given their important contribution to disease progression, mapping fibroblasts’ heterogeneity is critical to devise effective anti-cancer therapies. Cancer-associated fibroblasts (CAFs) represent the most abundant cell population in pancreatic ductal adenocarcinoma (PDAC). Whether CAF phenotypes are differently specified by PDAC cell lineages remains to be elucidated. Here, we reveal an important role for the MAPK signalling pathway in defining PDAC CAF phenotypes. We show that epithelial MAPK activity promotes the myofibroblastic differentiation of CAFs by sustaining the expression and secretion of TGF-β1. We integrate single-cell profiling of post-perturbation transcriptional responses from mouse models with cellular and spatial profiles of human tissues to define a MAPKhigh CAF (mapCAF) phenotype. We show that this phenotype associates with basal-like tumour cells and reduced frequency of CD8+ T cells. In addition to elevated MAPK activity, this mapCAF phenotype is characterized by TGF-b signalling, hypoxia responsive signatures, and immunoregulatory gene programs. Furthermore, the mapCAF signature is enriched in myofibroblastic CAFs from various cancer conditions and correlates with reduced response to immune checkpoint inhibition in melanoma Altogether, our data expand our knowledge on CAF phenotype heterogeneity and reveal a potential strategy for targeting of myofibroblastic CAFs in vivo.

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Differential Activity of MAPK signalling Defines Fibroblast Subtypes in Pancreatic Cancer (scRNA-Seq)

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Differential activity of MAPK signalling defines fibroblast subtypes in pancreatic cancer.

Project description:Fibroblast heterogeneity is increasingly recognised across cancer conditions. Given their important contribution to disease progression, mapping fibroblasts' heterogeneity is critical to devise effective anti-cancer therapies. Cancer-associated fibroblasts (CAFs) represent the most abundant cell population in pancreatic ductal adenocarcinoma (PDAC). Whether CAF phenotypes are differently specified by PDAC cell lineages remains to be elucidated. Here, we reveal an important role for the MAPK signalling pathway in defining PDAC CAF phenotypes. We show that epithelial MAPK activity promotes the myofibroblastic differentiation of CAFs by sustaining the expression and secretion of TGF-β1. We integrate single-cell profiling of post-perturbation transcriptional responses from mouse models with cellular and spatial profiles of human tissues to define a MAPKhigh CAF (mapCAF) phenotype. We show that this phenotype associates with basal-like tumour cells and reduced frequency of CD8+ T cells. In addition to elevated MAPK activity, this mapCAF phenotype is characterized by TGF-β signalling, hypoxia responsive signatures, and immunoregulatory gene programs. Furthermore, the mapCAF signature is enriched in myofibroblastic CAFs from various cancer conditions and correlates with reduced response to immune checkpoint inhibition in melanoma. Altogether, our data expand our knowledge on CAF phenotype heterogeneity and reveal a potential strategy for targeting myofibroblastic CAFs in vivo.

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Differential Activity of MAPK signalling Defines Fibroblast Subtypes in Pancreatic Cancer

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