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ABSTRACT: Single Cell RNA Sequencing of CT26, CT26-OVA, and CT26-LMP1 mouse tumors

PROVIDER: PRJNA736082 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR14763270_1.fastq.gz	Fastqsanger.gz
	SRR14763270_2.fastq.gz	Fastqsanger.gz
	SRR14763271_1.fastq.gz	Fastqsanger.gz
	SRR14763271_2.fastq.gz	Fastqsanger.gz
	SRR14763272_1.fastq.gz	Fastqsanger.gz

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The exonuclease TREX1 constitutes an innate immune checkpoint limiting cGAS/STING-mediated anti- tumor immunity

Project description:Given that TREX1-deficient tumor cells showed a growth delay in immunocompetent but not immunodeficient hosts, we characterize the consequences of CT26 tumor-intrinsic TREX1 loss on the host immune system by performing single-cell RNA sequencing on intra-tumoral immune cells sorted from control and TREX1 KO CT26 tumors.

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Project description:Single-cell RNA sequencing of immune infiltrates in CT26 tumors (combined administration)

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Single-cell mRNA sequencing of anti-PD-1 GITR-L bispecific antibody treated CT26 mouse tumor model infiltrating leukocytes

Project description:Single-cell mRNA sequencing of anti-PD-1 GITR-L bispecific antibody treated CT26 mouse tumor model infiltrating leukocytes

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Multiome analysis (ATAC + Gene Expression (GEX)) of SUN1 knockout and control CT26 tumors grown in syngeneic mouse model

Project description:T cell infiltration is essential for immune checkpoint inhibitors to be effective in treating solid cancers. Through a bioinformatic pipeline, we identified a target gene SUN1 that might relate to modulating immune cell infiltration and immune response. Thus, we generated one Sun1_knockout CT26 cell line (Sun1_KO) using CRISPR-Cas9. By performing multiome single nuclei sequencing using tumors grown in syngeneic model, we set out to understand how mouse Sun1 can affect the regulatory network in tumor cells in vivo.

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RNA-Seq analysis of SUN1 knockout and control CT26 cells and tumors

Project description:T cell infiltration is essential for immune checkpoint inhibitors to be effective in treating solid cancers. Through a bioinformatic pipeline, we identified a target gene SUN1 that might relate to modulating immune cell infiltration and immune response. Thus, we generated one Sun1_knockout CT26 cell line (Sun1_KO) and two control CT26 cell lines (Sun1_Control) using CRISPR-Cas9. By performing RNA-seq on cultured cells, tumors grown in syngeneic model, and purified tumor cells from tumors grown in syngeneic model, we set out to understand how mouse Sun1 can affect immune-related pathways and immune cell infiltration and anti-PD1 efficacy in BALB/c mice.

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RNA sequencing data of CT26-shppp2r1a and CT26-scr samples

Project description:Goal: Microsatellite-instable (MSI) tumors are one of the few cancers that respond to immune checkpoint blockade (ICB); however, the mechanism of MSI status development is unclear. Here, we report that protein phosphatase 2A (PP2A) deletion or inactivation converted cold microsatellite-stable (MSS) into MSI tumors. Objectives: Using RNA sequencing data of three CT26-shppp2r1a data and a CT26-scr data, we demonstrate that these intestinal tumors display differential core driver pathways.

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Subclone of resistant CT26 murine tumor shows high sensitivity to VA7 virotherapy: A novel system to study innate immunity and antigen dominance in oncolytic immuno-virotherapy

Project description:Recently, attenuated Semliki Forest virus vector VA7 completely eliminated type I interferon (IFN) unresponsive human U87 glioma xenografts while IFN responsive mouse GL261 and CT-2A gliomas proved refractory to the oncolytic virotherapy. Here we describe in two clones of a well established Balb/c mouse tumor cell line, CT26 murine colon carcinoma, diametrically opposed IFN responsiveness and sensitivity to oncolytic virus. Both CT26WT and CT26LacZ clones secreted biologically active type I IFN in vitro upon infection but virus replication was self-limiting only in CT26WT cells. Total transcriptome sequencing (RNA-Seq) and western blotting experiments revealed that in sharp contrast to CT26LacZ cells, CT26WT cells had strong constitutive expression of 56 different genes associated with pattern recognition and type I interferon signaling pathways, spanning two reported anti-RNA virus gene signatures and22 genes that have been reported to have direct anti-Alphaviral activity. Correspondingly, only CT26LacZ tumors were infectable in vivo, resulting in rapid central necrosis of the tumors by 96 hours post infection and complete tumor eradication both in immunocompetent and in SCID mice. CT26LacZ tumor eradication by oncolysis induced 100% protective immunity against homologous CT26LacZ challenge but only 50% protection against heterologous CT26WT challenge, indicating LacZ immune dominance over shared antigens. We believe the two clone CT26 system described herein constitutes a challenging yet realistic model for clonally and immunologically heterogeneous cancer where a strong therapy efficacy bias toward sensitive tumor subpopulations might falsely predict therapeutic success on a broad patient scale highlighting the necessity of successful pre-screening for responsive tumors. RNA-Seq in CT26 tumor cell line

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