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VEGF receptor inhibitor brivanib sensitizes chemotherapy by targeting cGAS to boost antitumor immunity

ABSTRACT: VEGF receptor inhibitor brivanib sensitizes chemotherapy by targeting cGAS to boost antitumor immunity

PROVIDER: PRJNA785581 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR17097322_1.fastq.gz	Fastqsanger.gz
	SRR17097322_2.fastq.gz	Fastqsanger.gz
	SRR17097323_1.fastq.gz	Fastqsanger.gz
	SRR17097323_2.fastq.gz	Fastqsanger.gz
	SRR17097324_1.fastq.gz	Fastqsanger.gz

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VEGF receptor inhibitor brivanib sensitizes chemotherapy by targeting cGAS to boost antitumor immunity

Project description:Chemoresistance challenges the clinical application of most widely used platinum-based cancer chemotherapeutics which canonically function through inducing DNA damage. The DNA sensor cyclic GMP–AMP synthase (cGAS) connects genome instability to type I IFN response which confers vulnerability to platinum treatment. Here, by using a high throughput small-molecule-microarray-based screening of cGAS interacting compounds, we identified brivanib, known as an inhibitor of the vascular endothelial growth factor receptor (VEGFR), as a novel cGAS agonist. Brivanib markedly enhanced platinum-induced STING-TBK1-type I IFN response in tumor cells indispensable of cGAS. Importantly, brivanib synergizes the effect of cisplatin in restricting the growth of xenografted Lewis Lung Cancer (LLC) cells by boosting CD8+ T cell response in a cGAS-dependent manner. Mechanistically, brivanib enhances the DNA binding affinity of cGAS by directly targeting leucine 495 of cGAS. Moreover, leucine 495 of cGAS is essential for brivanib-mediated promoting effect on cisplatin-mediated type I IFN response and inhibition of tumor growth. Clinically, higher expression of cGAS in tumor renders a more favorable response to platinum-based chemotherapeutic regimens and better prognosis in lung cancer patient. Taken together, our findings discover cGAS as an unprecedented target of brivanib and provide a rationale for the combination of brivanib with platinum-based chemotherapeutics in cancer treatment.

2022-12-31 | GSE190016 | GEO

SETDB1-TRIM28 complex suppresses antitumor immunity [RNA-seq]

Project description:Epigenetic mechanism contributes to immune landscapes in cancer. Here we identify the SETDB1-TRIM28 complex as a critical suppressor of antitumor immunity. An epigenetic CRISPR-Cas9 screen of 1,218 chromatin regulators identified TRIM28 as a novel suppressor of PD-L1 expression. We revealed that expression of the SETDB1-TRIM28 complex negatively correlates with infiltration of effector CD8+ T cells. Inhibition of SETDB1-TRIM28 simultaneously upregulates PD-L1 and activates the cGAS-STING innate immune response to increase infiltration of CD8+ T cells. Mechanistically, SETDB1-TRIM28 inhibition leads to micronuclei formation in cytoplasm, a known activator of the cGAS-STING pathway. Thus, SETDB1-TRIM28 inhibition bridges the innate and adaptive immunity. Indeed, SETDB1 knockout enhances the antitumor effects of immune checkpoint blockade anti-PD-L1 in an ovarian cancer mouse model in a cGAS dependent manner. Our findings establish SETDB1-TRIM28 complex as a regulator of antitumor immunity and its loss activates cGAS-STING innate immunity to boost antitumor effects of immune checkpoint blockades.

2021-10-20 | GSE182089 | GEO

SETDB1-TRIM28 complex suppresses antitumor immunity [CRISPR/Cas9 screen]

2021-10-20 | GSE182197 | GEO

VEGF blockade enhances the antitumor effect of BRAFV600E inhibition

Project description:VEGF blockade enhances the antitumor effect of BRAFV600E inhibition

| PRJNA286655 | ENA

Anti-VEGF treatment enhances antitumor responses by targeting regulatory T cells

Project description:Anti-VEGF treatment enhances antitumor responses by targeting regulatory T cells

| PRJNA1051533 | ENA

Gene induction in STAT1-/- fibroblasts transduced with lentiviruses expressing human cGAS

Project description:The hypothesis tested was that lentiviral driven cGAS expression activates antiviral gene expression. Cells were transduced with lentiviruses expressing cGAS or a control (firefly luciferase). Total RNA was harvested 48 h post-transduction and processed for Illumina BeadArray.

2013-12-01 | E-GEOD-52241 | biostudies-arrayexpress

Reactivating cGAS-STING Signaling by Targeting SOS1 Enhances Antitumor Immunity in NRAS-Mutant Tumors

Project description:NRAS is commonly mutated in several different types of human cancer. NRAS-mutant tumors are aggressive and associated with poor outcomes. Although the development of targeted therapies as well as immune checkpoint inhibitors has led to a substantial improvement in the overall survival of patients with NRAS wild-type tumors, current therapies for NRAS-mutant cancers are limited. Here, analysis of RNA-sequencing data revealed a downregulation of the type I interferon response in NRAS-mutant tumors compared with NRAS wild-type tumors, which was associated with poor prognosis in NRAS-mutant melanoma. Knockdown of mutant NRAS, but not wild-type NRAS, enhanced the activation of cGAS-STING signaling. The formation of a trimeric complex between TBK1, STING, and IRF3, which is required for the activation and nuclear translocation, was blocked in NRAS-mutant tumor cells. Inactivation of innate immune signaling by mutant NRAS altered cytokine production, resulting in cell autonomous and non-cell autonomous signaling to prevent tumor cell death and in evasion of tumor immune surveillance. Screening of drugs for the ability to stimulate the release of CXCL10 revealed that SOS1 inhibitors reactivated cGAS-STING signaling in NRAS-mutant tumor cells. Importantly, combining SOS1 inhibitors with STING agonists maximized the activation of cGAS-STING signaling and elicited an increased antitumor immune response in vitro and in vivo. Overall, this study provides insights into the regulation of anti-tumor immunity by mutant NRAS and uncovers a potential strategy for treating NRAS-mutant cancer.

2025-05-11 | GSE290171 | GEO

53BP1 loss elicits cGAS-STING-dependent antitumor immunity in ovarian and pancreatic cancer

Project description:53BP1 loss elicits cGAS-STING-dependent antitumor immunity in ovarian and pancreatic cancer

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Anti-VEGF treatment enhances antitumor responses by targeting regulatory T cells

Project description:Cholangiocarcinoma (CCA) shows limited response to systemic treatments including immunotherapy. We initiated an open-label phase II clinical trial testing bevacizumab (anti-VEGF-A) plus tremelimumab (anti-CTLA-4) and durvalumab (anti-PD-L1) in patients with primary liver cancer. Exceptional responses were observed in patients with CCA that were accompanied with moderate to severe, yet manageable immune-related events in the majority of patients. Correlative studies using paired PBMC and serum samples demonstrated a proinflammatory cytokine profile, reinvigoration of precursor exhausted CD8+ T cells, and expansion of regulatory T cell and non-classical monocyte subsets. We utilized subcutaneous, orthotopic as well as plasmid-induced murine CCA models to better understand how anti-VEGF-A enhances anti-tumor immunity induced by anti-CTLA4 plus anti-PD-L1. We describe a novel multi-modal mechanism of how anti-VEGF-A therapy enhances immune checkpoint inhibitor-induced immune responses. The treatment effect was dependent on an increase in tumor infiltrating B cells and IL-12 causing Treg rewiring towards fragile and unstable states. Using a mouse model that genetically ablates VEGFR2 expression on Tregs, we show that the VEGF /VEGFR2 axis on Tregs contributes to the pro-tumoral function of Tregs and supports tumor progression in a syngeneic CCA model. This study provides clinical evidence that simultaneously targeting three immunosuppressive axes, namely VEGF-A, CTLA-4 and PD-L1, can elicit strong anti-tumor immunity to potentiate CCA regression and merits broader evaluation in other cancers.

2025-03-14 | GSE249974 | GEO

Reactivating cGAS-STING Signaling by Targeting SOS1 Enhances Antitumor Immunity in NRAS-Mutant Tumors

Project description:Reactivating cGAS-STING Signaling by Targeting SOS1 Enhances Antitumor Immunity in NRAS-Mutant Tumors

| PRJNA1226513 | ENA