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PD-L1 is an IFNγ-independent maturation marker on tumor-associated macrophages and associates with good clinical outcome in human breast cancer

ABSTRACT: PD-L1 is an IFNγ-independent maturation marker on tumor-associated macrophages and associates with good clinical outcome in human breast cancer

PROVIDER: PRJNA1043167 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26894378.fastq.gz	Fastqsanger.gz
	SRR26894379.fastq.gz	Fastqsanger.gz
	SRR26894380.fastq.gz	Fastqsanger.gz
	SRR26894381.fastq.gz	Fastqsanger.gz

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UBIQUITIN LIGASE STUB1 DESTABILIZES IFNγ-RECEPTOR COMPLEX TO SUPPRESS TUMOR IFNγ SIGNALING

Project description:The cytokine IFNγ differentially impacts on tumors upon immune checkpoint blockade (ICB). Despite our understanding of downstream signaling events, less is known about 36 regulation of its receptor (IFNγ-R1). With an unbiased genome-wide CRISPR/Cas9 screen for critical regulators of IFNγ-R1 cell surface abundance, we identified STUB1 as an E3 ubiquitin ligase for IFNγ-R1 in complex with its signal-relaying kinase JAK1. STUB1 mediates ubiquitination-dependent proteasomal degradation of IFNγ-R1/JAK1 complex through IFNγ-R1K285 and JAK1K249. Conversely, STUB1 inactivation amplifies IFNγ signaling, sensitizing tumor cells to cytotoxic T cells in vitro. This was corroborated by an anticorrelation between STUB1 expression and IFNγ response in ICB-treated patients. Consistent with the context-dependent effects of IFNγ in vivo, anti-PD-1 response was increased in heterogenous tumors comprising both wildtype and STUB1-deficient cells but not full STUB1 knockout tumors. These results uncover STUB1 as a critical regulator of IFNγ-R1, and highlight the context-dependency of STUB1-regulated IFNγ signaling for ICB outcome.

2022-03-07 | PXD030580 | Pride

PD-L1 is an IFNγ-independent maturation marker on tumor-associated macrophages and associates with good clinical outcome in human breast cancer

Project description:ER+ breast cancer is an immune cold cancer. We utilized single-cell RNA-sequencing to learn the cell heterogeneity in ER+ breast tumor microenvironment.

2024-01-08 | GSE248288 | GEO

STUB1 dampens IFNγ response in tumors by destabilizing the IFNγ receptor complex

Project description:Despite its success, immune checkpoint blockade (ICB) cannot induce durable responses in most patients. This is partially attributed to reduced sensitivity to interferon gamma (IFNγ). Thus, elevating tumor IFNγ-receptor 1 (IFNγ-R1) expression to enhance IFNγ-mediated cytotoxicity is of clinical interest. Here, we demonstrate higher IFNγ-R1 expression to sensitize tumors to IFNγ-mediated killing. To unveil the largely undefined mechanisms of IFNγ-R1 expression, we performed a genome-wide CRISPR/Cas9 knockout screen for suppressors of IFNγ-R1 tumor cell surface abundance. We uncovered STUB1 as key mediator for proteasomally degrading IFNγ-R1/JAK1 complex. Conversely, STUB1 inactivation in tumor cells amplified IFNγ signaling and sensitized to cytotoxic T cells, but permitted IFNγ-induced PD-L1 expression. Rationally combining STUB1 inactivation with anti-PD-1 treatment effectively eliminated tumors in vivo. Clinically corroborating this is a STUB1 transcriptomic signature that associates with response to anti-PD-1 treatment in two patient cohorts. Thus, uncovering STUB1 as a pivotal regulator of IFNγ signaling and a synergistic target for anti-PD-1 treatment.

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Losses of chromosome 5q and 14q mark a subset of gastric cancers with good clinical outcome

Project description:Purpose: To improve clinical outcome of gastric cancer patients, most emphasis is on improving therapeutic regimens, including more extensive surgery as well as (neo)adjuvant chemotherapy. The present study set out to identify, based on DNA copy number profiling, subgroups of patients with different clinical outcomes who thus would qualify for different therapy intensities. Experimental Design: DNA of 206 gastric cancer patients was isolated and analyzed by genome wide array comparative genomic hybridization. DNA copy number profiles were evaluated and correlated to lymph node status and survival. In addition, HSP90 protein expression was analyzed and correlated to survival in 290 gastric cancer patients. Results: Frequent (>20%) DNA copy number gains were observed on chromosomes 1p, 6p, 7p, 7q, 8q, 11q, 12q, 13q, 16p, 16q, 17q, 19p, 19q, 20p, 20q, 21q and 22q, and losses on chromosomes 4p, 4q, 6p, 6q, 9p, 13q and 21q. Lymph node negative gastric cancers showed significantly more losses on chromosomes 5q11.2-q35.1, 10q11.23-21.3 and 14q32.11-q32.33. In addition, losses on 5q11.2-q31.3 and 14q32.11-q32.33 were highly correlated to good clinical outcome, in both lymph node negative and positive gastric cancer patients. Loss of expression of HSP90, located on chromosome 14q32.2, correlated to good survival time. Conclusion: Genome wide DNA copy number profiling allows to identify a subgroup of gastric cancers, marked by losses on chromosomes 5q11.2-q31.3 and 14q32.11-q32.33 that have an excellent clinical outcome after surgery alone, and patients with these tumors are unlikely to benefit from additional intensified therapies. Possible biological mechanisms could involve loss of heat shock proteins, of which the coding genes are located at these chromosomal regions. 183 gastric adenocarcinomas

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Project description:chromatin accessibility (ATAC-seq) experiment. HeLa cells were primed with IFNγ for 24 hours, followed by IFNγ washout. After 48h, naïve and primed cells were induced by IFNγ for 1h and 3h. Cells were harvested at indicated time points and processed for ATAC-seq.

2023-05-06 | E-MTAB-12624 | biostudies-arrayexpress

STAT1 and IRF1 enrichment in naive and primed HeLa cells upon IFNγ treatment

Project description:STAT1 and IRF1 transcription factor enrichment by CUT&RUN. HeLa cells were primed with IFNγ for 24 hours, followed with IFNγ washout. After 48h, naïve and primed cells were induced by IFNγ for 1h and 3h. Cells were harvested at indicated time points and processed for CUT&RUN

2023-05-06 | E-MTAB-12625 | biostudies-arrayexpress

Bulk RNA-seq analysis of IFNγ-PD-L1all, IFNγ+PD-L1all and IFNγ+PD-L1hi PDAC cells

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