GO:0141111 positive regulation of cGAS/STING signaling pathway: Immune Amplification Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0141111 describes any process that activates or increases the frequency, rate or extent of cGAS/STING signaling, a cytosolic DNA-sensing cascade that drives type I interferon and inflammatory gene expression.
• Positive regulation of cGAS/STING signaling is essential for antitumor immunity, as cGAS-STING-mediated DNA sensing maintains CD8+ T cell stemness and promotes responsiveness to T cell therapy.
• Multiple post-translational modifiers, including HERC5-catalyzed ISGylation, potentiate cGAS-mediated innate immunity and represent direct positive regulators of this pathway.
• Metabolic and cell-death inputs, such as aspartate deficiency and ZBP1-MLKL necroptotic signaling, can amplify intratumoral STING activation and enhance radiation-induced antitumor immunity.
• Positive regulation of cGAS/STING signaling extends beyond oncology: it shapes endothelial-T cell cross-talk and tertiary lymphoid structure formation, and modulates intestinal inflammation and ferroptosis in colitis.
• Dysregulated amplification of this pathway contributes to atherosclerosis-associated endothelial inflammation and pancreatic cancer progression, making it a context-dependent therapeutic target.
Description
The cGAS/STING signaling pathway is a cytosolic DNA-sensing cascade that converts the detection of aberrant DNA into type I interferon and inflammatory responses. GO:0141111, positive regulation of cGAS/STING signaling pathway, captures all processes that activate or increase the frequency, rate or extent of this cascade. Understanding these positive regulators is central to immunology and oncology because the magnitude and duration of STING output determine whether the response is protective or pathogenic. Positive regulation of cGAS/STING signaling is not a single molecular event but an emergent property of many inputs. These include post-translational modification of cGAS itself, metabolic cues such as aspartate availability, cell-death signaling through ZBP1-MLKL, and intercellular communication between endothelial cells and T cells. Each input can shift the pathway from a transient antiviral response to a sustained immunostimulatory state. For researchers, GO:0141111 provides a structured framework to annotate genes that enhance rather than merely participate in cGAS/STING signaling. This distinction matters for target discovery: positive regulators are candidate agonists for cancer immunotherapy, whereas their inhibition may be desirable in inflammatory or autoimmune settings. The sections below integrate the QuickGO definition with verified experimental literature to map the mechanisms, genes, disease links and CRISPR-based methods relevant to this GO term.
positive regulation of cGAS/STING signaling pathway At A Glance
| GO ID | GO:0141111 |
|---|---|
| GO term | positive regulation of cGAS/STING signaling pathway |
| Ontology | biological_process |
| Synonym | None listed in QuickGO |
| Major function | Activates or increases the frequency, rate or extent of cGAS/STING signaling |
| Pathway context | Cytosolic DNA sensing leading to type I interferon and inflammatory gene expression |
| Representative positive regulators | HERC5, ZBP1-MLKL signaling, aspartate metabolism, endothelial-T cell cross-talk |
| Disease relevance | Antitumor immunity, colitis, atherosclerosis, pancreatic cancer, tertiary lymphoid structures |
| Research methods | Knockout, point mutation, knock-in, overexpression, CRISPR library screening, transcriptomics and imaging |
What Is GO:0141111?
GO:0141111 (positive regulation of cGAS/STING signaling pathway) is a biological process term defined as any process that activates or increases the frequency, rate or extent of cGAS/STING signaling. In practical terms, it covers gene products and cellular events that amplify DNA sensing, enhance STING activation, or prolong downstream interferon and NF-kB signaling. It is distinct from the core cGAS/STING signaling term itself, because it specifically requires a positive, regulatory effect on the pathway rather than direct participation in it.
Why Is positive regulation of cGAS/STING signaling pathway Important in Cell Biology?
Positive regulation of cGAS/STING signaling determines the strength and durability of innate immune activation, which in turn shapes adaptive antitumor immunity and inflammatory pathology. cGAS-STING-mediated DNA sensing maintains CD8+ T cell stemness and is required for effective antitumor T cell therapy, so identifying positive regulators can reveal strategies to boost immunotherapy responses. Conversely, excessive or chronic amplification of the pathway contributes to endothelial inflammation in atherosclerosis and supports pancreatic cancer progression, making these regulators context-dependent drug targets. Because positive regulators include enzymes, metabolic sensors and cell-death effectors, they offer diverse entry points for therapeutic modulation and for CRISPR-based functional genomics.
• Sustains CD8+ T cell stemness and improves antitumor T cell therapy outcomes.
• Potentiates radiation-induced antitumor immunity through intratumoral STING activation.
• Links metabolic stress, such as aspartate deficiency, to enhanced cGAS-STING signaling in antitumor immunity.
• Drives endothelial cell-T cell cross-talk and tertiary lymphoid structure formation.
• Modulates intestinal inflammation and ferroptosis in colitis models.
• Contributes to aortic endothelial inflammation and atherosclerosis when dysregulated.
• Supports pancreatic cancer progression through modulation of cGAS-STING signaling.
• Provides candidate targets for agonist-based cancer immunotherapy and antagonist-based anti-inflammatory strategies.
• Enables functional genomics screens to separate positive regulators from core pathway components.
What Happens During positive regulation of cGAS/STING signaling pathway?
Amplification of cytosolic DNA sensing by post-translational modifiers
In simple terms: Certain enzymes tag cGAS with chemical marks that make it work harder.
Positive regulation of cGAS/STING signaling can begin with direct modification of cGAS. HERC5-catalyzed ISGylation potentiates cGAS-mediated innate immunity, demonstrating that ubiquitin-like conjugation is a bona fide positive regulatory input to this pathway. Such modifications increase the efficiency with which cGAS detects cytosolic DNA and initiates downstream signaling, thereby raising the frequency and extent of pathway activation.
Metabolic and stress-dependent enhancement of STING output
In simple terms: The cell's metabolic state can turn up the volume on STING signaling.
Aspartate deficiency amplifies cGAS-STING signaling in antitumor immunity, showing that nutrient stress can act as a positive regulator of this pathway. Similarly, ZBP1-MLKL necroptotic signaling potentiates radiation-induced antitumor immunity via intratumoral STING pathway activation, linking cell-death machinery to enhanced STING output. These examples illustrate that positive regulation integrates metabolic and stress signals rather than relying solely on DNA detection.
Intercellular cross-talk that sustains pathway activation
In simple terms: Different cell types talk to each other to keep the DNA-sensing alarm ringing.
cGAS-activated endothelial cell-T cell cross-talk initiates tertiary lymphoid structure formation, indicating that positive regulation can operate at the tissue level through intercellular communication. In this setting, activation of cGAS in endothelial cells promotes recruitment and organization of T cells, creating a positive feedback loop that sustains cGAS/STING signaling and downstream lymphoid tissue formation.
Context-dependent amplification in inflammation and cancer
In simple terms: The same amplification that fights tumors can worsen inflammation or support cancer growth.
Neuropeptide substance P attenuates colitis by suppressing inflammation and ferroptosis via the cGAS-STING signaling pathway, indicating that modulation of this pathway can be protective in intestinal inflammation. In contrast, UNC93B1 promotes pancreatic cancer progression through modulation of cGAS-STING signaling, and NCOA4-linked endothelial ferritinophagy and ferroptosis aggravate aortic endothelial inflammation and atherosclerosis. Thus, positive regulation of cGAS/STING signaling has disease-specific consequences that depend on cell type and tissue context.
Key Genes Involved in GO:0141111 positive regulation of cGAS/STING signaling pathway
The following genes and proteins have been experimentally linked to positive regulation or modulation of cGAS/STING signaling in the verified literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| CGAS | Cytosolic DNA sensor that initiates cGAS/STING signaling | Core pathway component whose activity is enhanced by positive regulators |
| STING1 | Adaptor that activates TBK1-IRF3 and NF-kB signaling | Central node whose activation is amplified by metabolic and cell-death inputs |
| HERC5 | ISGylation enzyme that potentiates cGAS-mediated innate immunity | Direct positive regulator of cGAS function |
| ZBP1 | Necroptotic sensor that potentiates radiation-induced STING activation | Links cell-death signaling to intratumoral STING pathway activation |
| MLKL | Necroptosis effector downstream of ZBP1 | Mediates ZBP1-dependent enhancement of STING-driven antitumor immunity |
| UNC93B1 | Endosomal trafficking protein that modulates cGAS-STING signaling | Promotes pancreatic cancer progression via pathway modulation |
| NCOA4 | Ferritinophagy receptor linked to ferroptosis | Regulates endothelial inflammation and atherosclerosis with cGAS-STING involvement |
| TAC1 | Precursor of substance P neuropeptide | Substance P attenuates colitis via cGAS-STING signaling |
| CD8A | Marker of CD8+ T cells | cGAS-STING-mediated DNA sensing maintains CD8+ T cell stemness |
| TBK1 | Kinase activated downstream of STING | Transduces positive regulatory signals into IRF3 activation |
| IRF3 | Transcription factor driving type I interferon expression | Readout of enhanced cGAS/STING signaling |
| NFKB1 | Transcription factor mediating inflammatory gene expression | Downstream effector of amplified STING signaling |
| ISG15 | Ubiquitin-like modifier conjugated by HERC5 | Required for HERC5-mediated potentiation of cGAS |
| GSDMD | Gasdermin pore-forming protein in pyroptosis | Potential effector of inflammatory amplification in colitis models |
| ACSL4 | Lipid metabolism enzyme involved in ferroptosis | Linked to ferroptosis modulation via cGAS-STING in colitis |
| GPX4 | Glutathione peroxidase protecting against ferroptosis | Ferroptosis-related node in cGAS-STING-dependent inflammation |
| VIM | Cytoskeletal protein released during cell death | Potential damage signal amplifying STING activation |
| HMGB1 | Nuclear protein released as a danger signal | Candidate amplifier of cGAS/STING signaling in inflammatory contexts |
How Is positive regulation of cGAS/STING signaling pathway Regulated?
Positive regulation of cGAS/STING signaling is controlled at multiple levels. Post-translational modification is a direct mechanism: HERC5-catalyzed ISGylation potentiates cGAS-mediated innate immunity, effectively increasing the sensitivity of DNA sensing. Metabolic regulation provides a second layer, as aspartate deficiency amplifies cGAS-STING signaling in antitumor immunity, indicating that nutrient availability can set the threshold for pathway activation. Cell-death signaling constitutes a third layer, where ZBP1-MLKL necroptotic signaling potentiates radiation-induced antitumor immunity via intratumoral STING pathway activation. Finally, intercellular and tissue-level regulation occurs through cGAS-activated endothelial cell-T cell cross-talk that initiates tertiary lymphoid structure formation, creating a positive feedback loop. These layers collectively determine whether cGAS/STING signaling remains transient or becomes sustained, and they are modulated in disease contexts such as colitis, atherosclerosis and pancreatic cancer.
positive regulation of cGAS/STING signaling pathway and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CGAS | Antitumor immunity and CD8+ T cell stemness | Knockout and overexpression in tumor and T cell lines |
| STING1 | Radiation-induced antitumor immunity | Point mutation and knock-in models of STING activation |
| UNC93B1 | Pancreatic cancer progression | Knockout in pancreatic cancer cell lines and xenografts |
| NCOA4 | Atherosclerosis and endothelial inflammation | Endothelial cell knockout and ferroptosis assays |
| HERC5 | Innate immune potentiation via ISGylation | Overexpression and knockout in innate immune cells |
Cancer immunotherapy and antitumor immunity
Positive regulation of cGAS/STING signaling is a determinant of antitumor immunity. cGAS-STING-mediated DNA sensing maintains CD8+ T cell stemness and promotes antitumor T cell therapy, so enhancing this pathway could broaden immunotherapy efficacy. ZBP1-MLKL necroptotic signaling potentiates radiation-induced antitumor immunity via intratumoral STING pathway activation, and aspartate deficiency amplifies cGAS-STING signaling in antitumor immunity. However, UNC93B1 promotes pancreatic cancer progression through modulation of cGAS-STING signaling, illustrating that amplification can be tumor-promoting in some contexts.
Inflammatory bowel disease and colitis
Neuropeptide substance P attenuates colitis by suppressing inflammation and ferroptosis via the cGAS-STING signaling pathway, indicating that modulation of this pathway influences intestinal inflammation. This study links positive regulation of cGAS/STING signaling to ferroptosis-related pathology in the colon, suggesting that pathway activity must be tightly controlled to avoid excessive inflammatory damage.
Atherosclerosis and endothelial inflammation
NCOA4 linked to endothelial cell ferritinophagy and ferroptosis is a key regulator that aggravates aortic endothelial inflammation and atherosclerosis, with cGAS-STING signaling implicated in the inflammatory response. This positions positive regulation of cGAS/STING signaling as a contributor to vascular pathology when chronically activated in endothelial cells.
Tertiary lymphoid structure formation
cGAS-activated endothelial cell-T cell cross-talk initiates tertiary lymphoid structure formation, a process relevant to chronic inflammation and antitumor immunity. Positive regulation of cGAS/STING signaling in this setting promotes organized immune cell aggregates, which can be beneficial for tumor control but may also sustain inflammatory disease.
From positive regulation of cGAS/STING signaling pathway-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is a candidate gene required for cGAS/STING signaling? | CRISPR knockout in reporter cell lines |
| Does a specific residue mediate positive regulation? | Point mutation knock-in at the endogenous locus |
| Does a modifier enhance pathway output when tagged? | Tagged knock-in for interaction and localization studies |
| Can a gene amplify STING signaling when overexpressed? | Doxycycline-inducible overexpression in cancer cell lines |
| Which genes positively regulate the pathway at genome scale? | CRISPR library screening with interferon reporter readouts |
| Does pathway amplification alter immune cell cross-talk? | Co-culture of endothelial cells and T cells with knockout or overexpression |
How to Study the positive regulation of cGAS/STING signaling pathway Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA sequencing | Interferon and inflammatory gene expression | Profiling pathway amplification after gene knockout or overexpression |
| Luciferase reporter assay | Transcriptional activity of ISRE or NF-kB | Quantifying positive regulation in high-throughput format |
| Western blot | STING, TBK1, IRF3 phosphorylation | Confirming pathway activation at protein level |
| Immunoprecipitation-mass spectrometry | Protein interactions and ISGylation | Identifying direct modifiers of cGAS |
| CRISPR library screening | Genome-wide regulators of pathway output | Discovering novel positive regulators |
| Co-culture imaging | Endothelial-T cell interaction and aggregation | Modeling tertiary lymphoid structure formation |
| Metabolic profiling | Aspartate and related metabolite levels | Linking nutrient stress to STING amplification |
| Ferroptosis assays | Lipid peroxidation and cell death | Studying cGAS-STING-linked ferroptosis in inflammation |
Transcriptomic and interferon signature profiling
RNA sequencing of cells with knockout or overexpression of candidate positive regulators can quantify type I interferon and NF-kB target gene signatures downstream of cGAS/STING signaling. This approach helps distinguish genes that amplify the pathway from those that merely participate in DNA sensing.
Functional reporter assays for pathway activity
Interferon or NF-kB luciferase reporters, together with STING phosphorylation and IRF3 nuclear translocation readouts, provide quantitative measures of positive regulation. These assays are compatible with CRISPR knockout, point mutation and overexpression models to test causality.
Proteomic and post-translational modification analysis
Mass spectrometry-based proteomics can identify ISGylation and other modifications that potentiate cGAS function, as shown for HERC5-catalyzed ISGylation. Such analyses reveal direct molecular mechanisms of positive regulation.
Imaging and co-culture systems
Live-cell imaging and endothelial-T cell co-culture can capture intercellular cross-talk that initiates tertiary lymphoid structure formation downstream of cGAS activation. These methods are valuable for studying tissue-level positive regulation of cGAS/STING signaling.
How CRISPR Can Be Used to Study GO:0141111 positive regulation of cGAS/STING signaling pathway
Knockout
CRISPR knockout of candidate genes such as HERC5, UNC93B1 or NCOA4 can test whether they are required for positive regulation of cGAS/STING signaling. Loss-of-function models combined with interferon reporter assays reveal whether a gene is necessary for pathway amplification.
Point Mutation
Point mutation knock-in can dissect specific residues required for positive regulation, for example within STING or cGAS domains that mediate enhanced signaling. Such models distinguish catalytic activity from scaffolding functions.
Knock-in
Tagged knock-in of genes such as HERC5 or STING allows tracking of protein localization, interaction partners and post-translational modifications in the context of endogenous regulation. This approach preserves physiological expression levels while enabling mechanistic studies.
Overexpression
Overexpression of candidate positive regulators, including HERC5 or metabolic modifiers, can test sufficiency for enhancing cGAS/STING signaling and antitumor immunity. Inducible systems help avoid confounding effects of chronic pathway activation.
How EDITGENE Supports positive regulation of cGAS/STING signaling pathway Research
Researchers studying positive regulation of cGAS/STING signaling pathway-related genes often need to determine whether a candidate gene is causally involved in amplifying DNA sensing or is merely a downstream marker. CRISPR-based knockout, point mutation, knock-in and overexpression models provide the causal evidence required for publication-grade conclusions, while library screening and bioinformatics can nominate novel regulators for follow-up.
Contact EDITGENE today to design your custom CRISPR model for positive regulation of cGAS/STING signaling pathway research.
Frequently Asked Questions About positive regulation of cGAS/STING signaling pathway
What is GO:0141111 positive regulation of cGAS/STING signaling pathway?
GO:0141111 is a biological process term describing any process that activates or increases the frequency, rate or extent of cGAS/STING signaling, the cytosolic DNA-sensing cascade that drives type I interferon and inflammatory responses.
What genes are involved in positive regulation of cGAS/STING signaling?
Genes include CGAS, STING1, HERC5, ZBP1, MLKL, UNC93B1, NCOA4 and TAC1, based on experimental studies linking them to pathway amplification or modulation.
How does HERC5 regulate cGAS/STING signaling?
HERC5-catalyzed ISGylation potentiates cGAS-mediated innate immunity, making HERC5 a direct positive regulator of the pathway.
Why is positive regulation of cGAS/STING signaling important in cancer?
It maintains CD8+ T cell stemness, promotes antitumor T cell therapy, and can be amplified by radiation-induced necroptosis or aspartate deficiency to enhance antitumor immunity.
Can cGAS/STING signaling be harmful?
Yes, dysregulated amplification contributes to colitis-associated inflammation, atherosclerosis and pancreatic cancer progression, depending on context.
What methods are used to study positive regulation of cGAS/STING signaling?
Common methods include RNA sequencing, luciferase reporter assays, western blotting, immunoprecipitation-mass spectrometry, CRISPR library screening and co-culture imaging.
What is the role of ZBP1-MLKL signaling in STING activation?
ZBP1-MLKL necroptotic signaling potentiates radiation-induced antitumor immunity via intratumoral STING pathway activation.
How does aspartate deficiency affect cGAS-STING signaling?
Aspartate deficiency amplifies cGAS-STING signaling in antitumor immunity, linking metabolic stress to enhanced pathway output.
What CRISPR models are suitable for studying this pathway?
Knockout, point mutation, knock-in and overexpression models are all suitable, and CRISPR library screening can identify novel positive regulators.
Is positive regulation of cGAS/STING signaling involved in atherosclerosis?
NCOA4-linked endothelial ferritinophagy and ferroptosis aggravate aortic endothelial inflammation and atherosclerosis, with cGAS-STING signaling implicated in the inflammatory response.
Conclusion
GO:0141111 positive regulation of cGAS/STING signaling pathway defines the diverse inputs that amplify cytosolic DNA sensing into robust interferon and inflammatory responses. Verified studies show that this amplification is driven by post-translational modifiers such as HERC5, metabolic stress such as aspartate deficiency, cell-death signaling through ZBP1-MLKL, and intercellular cross-talk between endothelial cells and T cells. These mechanisms are central to antitumor immunity but can also promote colitis, atherosclerosis and pancreatic cancer progression, underscoring the need for context-specific targeting. CRISPR-based knockout, point mutation, knock-in and overexpression models, combined with library screening and bioinformatics, provide the causal evidence needed to distinguish true positive regulators from bystanders. EDITGENE supports these workflows to accelerate functional validation of cGAS/STING pathway amplifiers in cancer, inflammation and vascular disease research.
References
- 1. Lan J et al.. 2024. Neuropeptide substance P attenuates colitis by suppressing inflammation and ferroptosis via the cGAS-STING signaling pathway.. Int J Biol Sci 20(7):2507-2531 PMID: 38725846
- 2. Zhao R et al.. 2024. cGAS-activated endothelial cell-T cell cross-talk initiates tertiary lymphoid structure formation.. Sci Immunol 9(98):eadk2612 PMID: 39093956
- 3. Yang H et al.. 2026. UNC93B1 promotes pancreatic cancer progression through modulation of cGAS-STING signaling.. Front Immunol 17:1718849 PMID: 41716413
- 4. Li W et al.. 2020. cGAS-STING-mediated DNA sensing maintains CD8(+) T cell stemness and promotes antitumor T cell therapy.. Sci Transl Med 12(549) PMID: 32581136
- 5. Yang Y et al.. 2021. ZBP1-MLKL necroptotic signaling potentiates radiation-induced antitumor immunity via intratumoral STING pathway activation.. Sci Adv 7(41):eabf6290 PMID: 34613770
- 6. Liao Y et al.. 2026. Aspartate deficiency amplifies cGAS-STING signaling in antitumor immunity.. J Clin Invest 136(11) PMID: 42222880
- 7. Zhu L et al.. 2025. NCOA4 linked to endothelial cell ferritinophagy and ferroptosis:a key regulator aggravate aortic endothelial inflammation and atherosclerosis.. Redox Biol 79:103465 PMID: 39700692
- 8. Chu L et al.. 2024. HERC5-catalyzed ISGylation potentiates cGAS-mediated innate immunity.. Cell Rep 43(3):113870 PMID: 38421872
