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STING governs RCC growth through mitochondrial regulation of VDAC2

ABSTRACT: STING governs RCC growth through mitochondrial regulation of VDAC2

PROVIDER: PRJNA788511 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR17224884_1.fastq.gz	Fastqsanger.gz
	SRR17224884_2.fastq.gz	Fastqsanger.gz
	SRR17224885_1.fastq.gz	Fastqsanger.gz
	SRR17224885_2.fastq.gz	Fastqsanger.gz
	SRR17224886_1.fastq.gz	Fastqsanger.gz

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STING governs RCC growth through mitochondrial regulation of VDAC2

Project description:STING is an innate immune sensor for immune surveillance of viral or bacterial infection and maintenance of an immune-friendly microenvironment to unfavored tumorigenesis. Whether and how STING exerts any innate immunity independent function remains elusive. Here, we report that STING expression is increased in RCC patients and STING governs RCC growth through non-canonical innate immune signaling by maintaining mitochondrial ROS and calcium homeostasis. Mechanistically, we identify mitochondrial calcium transporter VDAC2 as a new STING binding partner and downstream effector, through suppression of which STING controls proper mitochondrial ROS/calcium levels. We also find palmitoylation of STING-C88/C91 residues is critical to mediate STING interaction with VDAC2 and inhibiting STING palmitoyl-transferases ZDHHCs by 2-BP significantly impedes RCC cell growth. Together, our studies reveal an innate immunity-independent function of STING in regulating RCC mitochondrial function and growth. We hope our study provides a rationale to apply palmitoylation inhibitors to treating RCC.

2022-11-29 | GSE190816 | GEO

STING Suppresses Mitochondrial VDAC2 to Govern RCC Growth Independent of Innate Immunity.

Project description:STING is an innate immune sensor for immune surveillance of viral/bacterial infection and maintenance of an immune-friendly microenvironment to prevent tumorigenesis. However, if and how STING exerts innate immunity-independent function remains elusive. Here, the authors report that STING expression is increased in renal cell carcinoma (RCC) patients and governs tumor growth through non-canonical innate immune signaling involving mitochondrial ROS maintenance and calcium homeostasis. Mitochondrial voltage-dependent anion channel VDAC2 is identified as a new STING binding partner. STING depletion potentiates VDAC2/GRP75-mediated MERC (mitochondria-ER contact) formation to increase mitochondrial ROS/calcium levels, impairs mitochondria function, and suppresses mTORC1/S6K signaling leading to RCC growth retardation. STING interaction with VDAC2 occurs through STING-C88/C91 palmitoylation and inhibiting STING palmitoyl-transferases ZDHHCs by 2-BP significantly impedes RCC cell growth alone or in combination with sorafenib. Together, these studies reveal an innate immunity-independent function of STING in regulating mitochondrial function and growth in RCC, providing a rationale to target the STING/VDAC2 interaction in treating RCC.

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Targeting Vdac2 enables IFNg-mediated destruction and inflammatory remodeling of tumors to overcome immune evasion [microarray 6]

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2025-03-19 | GSE280185 | GEO

Targeting Vdac2 enables IFNg-mediated destruction and inflammatory remodeling of tumors to overcome immune evasion [ATAC-seq2]

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Targeting VDAC2 enables IFNg-mediated destruction and inflammatory remodeling of tumors to overcome immune evasion [microarray 5]

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Inflammation-Driven Carcinogenesis is Mediated through STING [MEFs]

Project description:Chronic stimulation of innate immune pathways by microbial agents or damaged tissue is known to promote inflammation-driven tumorigenesis by unclarified mechanisms1-3. Here we demonstrate that mutagenic 7,12-dimethylbenz(a)anthracene (DMBA), etoposide or cisplatin induces nuclear DNA leakage into the cytosol to intrinsically activate STING (Stimulator of Interferon Genes) dependent cytokine production. Inflammatory cytokine levels were subsequently augmented in a STING-dependent extrinsic manner by infiltrating phagocytes purging dying cells. Consequently, STING-/- mice, or wild type mice adoptively transferred with STING-/- bone marrow, were almost completely resistant to DMBA-induced skin carcinogenesis compared to their wild type counterparts. Our data emphasizes, for the first time, a role for STING in the induction of cancer, sheds significant insight into the causes of inflammation-driven carcinogenesis, and may provide therapeutic strategies to help prevent malignant disease Total RNA obtained from wild type murine embryonic fibroblasts (WT MEFs), STING deficient MEFs (SKO), Trex1 deficient MEFs (TKO), and both STING and Trex1 deficient MEFs (STKO) treated with DMBA and examined cytokine production by these cells.

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Inflammation-Driven Carcinogenesis is Mediated through STING [skin]

Project description:Chronic stimulation of innate immune pathways by microbial agents or damaged tissue is known to promote inflammation-driven tumorigenesis by unclarified mechanisms1-3. Here we demonstrate that mutagenic 7,12-dimethylbenz(a)anthracene (DMBA), etoposide or cisplatin induces nuclear DNA leakage into the cytosol to intrinsically activate STING (Stimulator of Interferon Genes) dependent cytokine production. Inflammatory cytokine levels were subsequently augmented in a STING-dependent extrinsic manner by infiltrating phagocytes purging dying cells. Consequently, STING-/- mice, or wild type mice adoptively transferred with STING-/- bone marrow, were almost completely resistant to DMBA-induced skin carcinogenesis compared to their wild type counterparts. Our data emphasizes, for the first time, a role for STING in the induction of cancer, sheds significant insight into the causes of inflammation-driven carcinogenesis, and may provide therapeutic strategies to help prevent malignant disease Total RNA obtained from DMBA or acetone treated wild type (WT) or STING deficient (SKO) mouse skin or skin tumor was examined for gene expression.

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