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KRAS drives immune evasion in a genetic model of pancreatic cancer [bulk RNA-seq]

ABSTRACT: KRAS drives immune evasion in a genetic model of pancreatic cancer [bulk RNA-seq]

PROVIDER: PRJNA611623 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR11278072_1.fastq.gz	Fastqsanger.gz
	SRR11278072_2.fastq.gz	Fastqsanger.gz
	SRR11278073_1.fastq.gz	Fastqsanger.gz
	SRR11278073_2.fastq.gz	Fastqsanger.gz
	SRR11278074_1.fastq.gz	Fastqsanger.gz

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KRAS drives immune evasion in a genetic model of pancreatic cancer [bulk RNA-seq]

Project description:Immune evasion is a hallmark of KRAS-driven cancers, but underlying mechanism and clinical implications remain unclear.

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KRAS drives immune evasion in a genetic model of pancreatic cancer

Project description:We used CRISPR/Cas9 genome editing to inactivate KRAS in pancreatic cancer cells and isolated cell populations that still produce tumors in mice. We show that the malignant phenotype of KRAS knockout cells is stable. However, KRAS deficient cancer cells fail to avoid detection and elimination by the host immune system, indicating that a key aspect of tumor maintenance by oncogenic KRAS is to promote immune evasion. Our study uncovers changes both in cancer cells and stromal immunoreactive cells attributable to KRAS expression. Complementation studies indicate that BRAF, AKT and MYC are causative drivers of KRAS-mediated immune suppression. These results show that combination treatments that both target KRAS signaling and boost antitumor immunity will be an effective strategy to treat PDAC.

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KRAS drives immune evasion in a genetic model of pancreatic cancer

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Expression profiling of KRas ablation surviving cells and matched Kras expressing spheres in pancreatic tumors

Project description:In this dataset, we include the expression data obtained from KRas expressing tumors, matched Kras expressing tumor spheres, surviving cells and surviving cells after KRas re-expression for 24hs Data reported here are obtained from 5 independent tumors (from 1 to 5). For each tumor, expression data for the original Tumor (in vivo bulk tumor lesion), the KRas Expressing Spheres derived from the bulk tumor, the matched surviving cells after 8 days of KRas ablation (SCs) and Surviving Cells after 24 hours of KRas re-expression are reported.

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cAMP response element-binding protein mediates immune-evasion of KRAS-mutant lung adenocarcinomas

Project description:We discovered that KRAS-mutant lung adenocarcinomas (LADC) co-opt CREB in order to evade the innate immune system: KRAS-driven CREB activation in LADC suppresses the expression of CXCR1 ligands that would otherwise recruit neutrophils to the tumor site. CREB was overexpressed in murine KRAS-mutant LADC, pulmonary Creb1-deletion inhibited disease development, and Creb1-overexpression boosted the tumorigenicity of KRAS-mutant cells. Conditional Creb1 deletion in Kras-mutant LADC cells caused overexpression of CXCR1/2 ligands, and lung tumor-bearing Creb1-deleted mice displayed increased pulmonary neutrophils. Cxcr1-deficient mice were selectively permissive to KRAS-mutant tumor growth and showed defective neutrophil recruitment. The pro-tumor effects of CREB required intact host-Cxcr1 and those of host-Cxcr1 necessitated mutant KRAS in cancer cells. Pharmacologic CREB blockade prevented tumor growth and restored neutrophil recruitment only when initiated before immune evasion of KRAS-mutant LADC cells. CREB and CXCR1 expression were respectively restricted to tumor and stromal cells of human LADC, while CREB-controlled genes profoundly impacted survival. In summary, CREB-mediated immune evasion of KRAS-mutant LADC rests on signaling to myeloid CXCR1 and is actionable.

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Glycosphingolipid synthesis mediates immune evasion in Kras-driven cancer

Project description:Glycosphingolipid synthesis mediates immune evasion in Kras-driven cancer

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Breast Cancer Stem Cells Regulated Metabolism Remodeling of Bulk Tumor Cells Drives Immune Evasion

Project description:Reprogramming of energy metabolism plays pivotal roles in cancer progression and immune surveillance. Here, we demonstrated that breast cancer cells showed positive feedback enhanced aerobic glycolysis in hypoxia condition. Further investigation suggested that breast cancer stem cells (BCSCs) induced by hypoxia stimulate aerobic glycolysis in bulk tumor cells. Cells cultured with hypoxic tumor cell- or BCSC-secretome exhibited similar gene expression patterns, with global remodeling of metabolism pathways, particularly glycolysis. BCSCs regulated glycolysis promoted breast cancer progression and evasion of immune surveillance. Screening of BCSC secretome identified MIF as a pivotal factor that potentiated glycolysis by increasing the expression of ALDOC. Breast cancer cell–intrinsic MIF depletion inhibited tumor progression and augmented intratumoral cytolytic CD8+ T cells and pro-inflammatory macrophages. Targeting MIF optimized immune checkpoint therapy of breast cancer in both syngeneic mouse models and humanized mouse model. Hence, this study delineates the contribution of BCSC regulated bulk tumor cell glycolysis in immune surveillance; and thereby proposes strategies to optimize immunotherapy in breast cancer.

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