GO:0050777 negative regulation of immune response: Mechanism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0050777 (negative regulation of immune response) describes any process that stops, prevents, or reduces the frequency, rate or extent of the immune response.
• Negative regulation is essential to prevent immunopathology and autoimmunity, and is often hijacked by pathogens to evade host defense [1, 2, 3].
• Key mechanisms include degradation of signaling adaptors (e.g., MAVS, IRF3), induction of negative feedback by cytokines (e.g., IL-2), and suppression by SOCS proteins [2, 3, 6, 8].
• Dysregulation of negative regulation contributes to viral replication, chronic infection, and potentially autoimmune diseases [2, 4, 5, 8].
• CRISPR knockout, point mutation, knock-in, and overexpression models enable causal dissection of negative regulators in immune cells [1, 2, 3, 4, 7, 8].
• EDITGENE provides custom cell models and CRISPR library screening to study negative regulation of immune response at scale.
Description
The immune response is a double-edged sword: it must be strong enough to eliminate pathogens, yet tightly controlled to avoid collateral damage to host tissues. The Gene Ontology term GO:0050777, negative regulation of immune response, captures the biological processes that stop, prevent, or reduce the frequency, rate or extent of the immune response. This term encompasses diverse mechanisms, from intracellular degradation of signaling adaptors to extracellular cytokine-mediated feedback, and is conserved from insects to mammals [1, 6]. Understanding these processes is critical because pathogens often exploit them to evade immunity, and their failure can lead to autoimmunity or chronic inflammation [2, 3, 5, 8]. Research into negative regulation of immune response has revealed a complex network of E3 ligases, phosphatases, and feedback inhibitors that fine-tune immune signaling [3, 7, 8]. For example, the E3 ligase RNF5 negatively regulates MAVS-mediated antiviral innate immune response in black carp, while WDR77 inhibits prion-like aggregation of MAVS to limit antiviral signaling. Similarly, SOCS proteins participate in the regulation of innate immune response caused by viruses. These findings highlight the importance of negative regulation in maintaining immune homeostasis and preventing excessive inflammation. For researchers, GO:0050777 provides a framework to systematically study how immune responses are restrained. By combining CRISPR-based genetic models with functional assays, it is possible to identify novel negative regulators, dissect their mechanisms, and evaluate their potential as therapeutic targets in infectious diseases, cancer, and autoimmunity [1, 2, 4, 5, 6].
negative regulation of immune response At A Glance
| GO ID | GO:0050777 |
|---|---|
| GO term | negative regulation of immune response |
| Ontology | biological_process |
| Synonym | down regulation of immune response, down-regulation of immune response, downregulation of immune response, inhibition of immune response |
| Major function | Stops, prevents, or reduces the frequency, rate or extent of the immune response. |
| Related processes | Regulation of innate and adaptive immunity, cytokine signaling, pathogen evasion. |
| Key regulators | E3 ligases (e.g., RNF5), SOCS proteins, IL-2 feedback, viral proteins (e.g., FMDV VP1). |
| Disease relevance | Viral pathogenesis, autoimmunity, chronic inflammation, cancer. |
What Is GO:0050777?
According to the QuickGO definition, negative regulation of immune response (GO:0050777) refers to any process that stops, prevents, or reduces the frequency, rate or extent of the immune response, the immunological reaction of an organism to an immunogenic stimulus. In other words, it is the set of biological mechanisms that put the brakes on immune activation, ensuring that immune reactions are appropriately terminated or kept in check.
Why Is negative regulation of immune response Important in Cell Biology?
Negative regulation of immune response is crucial for maintaining immune homeostasis and preventing immunopathology. Without proper negative regulation, immune responses can become excessive, leading to tissue damage, autoimmunity, or chronic inflammatory diseases [1, 5, 6]. Conversely, pathogens often exploit negative regulatory pathways to suppress host immunity and establish infection [2, 3, 4, 8]. Therefore, understanding GO:0050777 is essential for developing therapies that either enhance immunity against pathogens or dampen harmful immune reactions.
• Prevents autoimmunity by restraining self-reactive immune responses [1, 5].
• Limits immunopathology during infection by reducing excessive inflammation [1, 6].
• Is exploited by viruses to evade host defense, e.g., FMDV VP1 degrades YTHDF2 to regulate IRF3 activity.
• Involves E3 ligases such as RNF5 that negatively regulate MAVS-mediated antiviral signaling.
• Includes cytokine-mediated feedback, such as IL-2-dependent negative feedback.
• SOCS proteins are key negative regulators of innate immune response caused by viruses.
• Dysregulation is linked to chronic viral infections and potentially cancer [2, 4, 8].
• Provides targets for immunotherapy and vaccine adjuvants [5, 8].
• Conserved across species, from Drosophila to mammals.
• Enables researchers to study immune balance using CRISPR models [1, 2, 3, 4, 7, 8].
What Happens During negative regulation of immune response?
Initiation of negative feedback
In simple terms: After an immune response starts, signals are sent to turn it off.
Negative regulation of immune response often begins with the activation of feedback inhibitors. For example, the quantal theory of immunity proposes that interleukin-2 (IL-2) produced by activated T cells subsequently acts as a negative feedback regulator to limit the immune response. Similarly, in Drosophila, negative regulators are induced upon immune challenge to prevent overactivation.
Degradation of signaling adaptors
In simple terms: Some proteins destroy key immune signaling molecules to shut down the response.
A major mechanism of negative regulation is the targeted degradation of signaling adaptors. The E3 ligase RNF5 negatively regulates MAVS-mediated antiviral innate immune response by promoting MAVS degradation in black carp. In another example, foot-and-mouth disease virus VP1 degrades YTHDF2 through autophagy to regulate IRF3 activity, thereby suppressing antiviral immunity. WDR77 inhibits prion-like aggregation of MAVS to limit antiviral innate immune response.
Suppression by SOCS proteins
In simple terms: SOCS proteins act as brakes on immune signaling pathways.
Suppressor of cytokine signaling (SOCS) proteins are key negative regulators of innate immune response caused by viruses. They are induced by cytokines and act in a negative feedback loop to inhibit JAK-STAT signaling, thereby dampening immune activation.
Viral evasion through negative regulation
In simple terms: Viruses can hijack the brakes to avoid being attacked.
Many viruses encode proteins that mimic or enhance negative regulation of immune response. For instance, finTRIM82 in orange spotted grouper negatively regulates the interferon response, likely aiding viral replication. Similarly, FMDV VP1 degrades YTHDF2 to regulate IRF3 activity for viral replication. These examples illustrate how pathogens exploit GO:0050777 to evade host immunity.
Resolution of immune response
In simple terms: Once the threat is gone, the immune response is turned off to restore peace.
Negative regulation is essential for resolving immune responses after pathogen clearance. In Cryptococcus neoformans infection, cytokines and costimulatory molecules mediate both positive and negative regulation of the immune response, ensuring that inflammation subsides. Failure of this resolution can lead to chronic inflammation or autoimmunity [1, 5].
Key Genes Involved in GO:0050777 negative regulation of immune response
The following genes and proteins are experimentally validated participants in negative regulation of immune response (GO:0050777).
| Gene | Major Role | Research Relevance |
|---|---|---|
| RNF5 | E3 ligase that negatively regulates MAVS-mediated antiviral innate immune response | Target for enhancing antiviral immunity |
| YTHDF2 | m6A reader degraded by FMDV VP1 to regulate IRF3 activity | Viral evasion mechanism |
| IRF3 | Transcription factor regulated by YTHDF2; its activity is modulated during viral infection | Interferon signaling |
| MAVS | Mitochondrial antiviral signaling adaptor; target of negative regulation by RNF5 and WDR77 | Antiviral innate immunity [3, 7] |
| WDR77 | Inhibits prion-like aggregation of MAVS to limit antiviral innate immune response | Negative regulator of MAVS aggregation |
| SOCS1 | Suppressor of cytokine signaling; inhibits JAK-STAT pathway | Negative feedback in innate immunity |
| SOCS3 | Suppressor of cytokine signaling; regulates cytokine responses | Inflammation control |
| IL-2 | Cytokine that mediates negative feedback regulation of immune response | T cell homeostasis |
| finTRIM82 | TRIM family protein that negatively regulates interferon response in grouper | Fish antiviral immunity |
| Cryptococcus neoformans antigens | Induce cytokines and costimulatory molecules that mediate negative regulation | Fungal infection immunity |
| Drosophila immune regulators | Positive and negative regulators of Drosophila immune response | Innate immunity model |
How Is negative regulation of immune response Regulated?
Negative regulation of immune response is itself tightly regulated. For example, IL-2 acts as a negative feedback regulator of the immune response, and its production is controlled by the strength and duration of T cell receptor signaling. SOCS proteins are induced by cytokines and then inhibit JAK-STAT signaling, forming a negative feedback loop. Additionally, viral proteins such as FMDV VP1 can actively degrade negative regulators like YTHDF2 to modulate IRF3 activity, thereby fine-tuning the immune response. These layers of regulation ensure that immune responses are appropriately balanced.
negative regulation of immune response and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| YTHDF2 | Foot-and-mouth disease virus replication | Knockout of YTHDF2 in porcine cells followed by FMDV infection |
| RNF5 | Antiviral innate immunity in fish | Knockout of RNF5 in black carp cells to assess MAVS signaling |
| SOCS1/SOCS3 | Viral infections and inflammation | Knockout mice or cell lines to study JAK-STAT regulation |
| IL-2 | Autoimmunity and T cell homeostasis | IL-2 knockout or knock-in reporter mice |
| finTRIM82 | Interferon response in grouper | Overexpression and knockout in grouper cells |
Viral pathogenesis
Many viruses exploit negative regulation of immune response to evade host defense. Foot-and-mouth disease virus VP1 degrades YTHDF2 through autophagy to regulate IRF3 activity, promoting viral replication. Similarly, finTRIM82 negatively regulates the interferon response in orange spotted grouper, likely aiding viral infection. SOCS proteins also participate in the regulation of innate immune response caused by viruses, and their dysregulation can lead to uncontrolled viral replication.
Autoimmunity and chronic inflammation
Failure of negative regulation can lead to autoimmunity and chronic inflammatory diseases. The immune response to Cryptococcus neoformans involves both positive and negative regulation; an imbalance may result in excessive inflammation. The quantal theory of immunity highlights that IL-2-dependent negative feedback is crucial to prevent overactivation of T cells, and its disruption may contribute to autoimmune conditions.
Cancer
Negative regulation of immune response can also impact cancer immunosurveillance. While direct evidence from the provided citations is limited, the general principle that negative regulators such as SOCS proteins can suppress antitumor immunity is well established. Further research is needed to link specific negative regulators to cancer outcomes.
From negative regulation of immune response-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X negatively regulate antiviral innate immunity? | Knockout cell line (e.g., RNF5 KO) followed by viral infection |
| How does a point mutation in a negative regulator affect its function? | Point mutation knock-in using CRISPR [2, 7] |
| What is the effect of overexpressing a negative regulator on immune response? | Overexpression cell model (e.g., WDR77 overexpression) |
| Where does a negative regulator localize during immune activation? | Tagged knock-in (e.g., GFP fusion) and imaging [1, 7] |
| Which genes are essential for negative regulation of immune response? | CRISPR library screening [1, 8] |
| How does a viral protein hijack negative regulation? | Knock-in of viral gene into host cells [2, 4] |
How to Study the negative regulation of immune response Process
| Method | What It Measures | Typical Application |
|---|---|---|
| CRISPR knockout screening | Loss-of-function phenotypes for all genes | Identify negative regulators of immune response [1, 8] |
| RNA-seq | Transcriptional changes | Define gene expression programs upon negative regulator perturbation |
| Proteomics | Protein abundance and interactions | Discover degradation targets and interactors [2, 3] |
| Immunoblotting | Protein levels and phosphorylation | Validate degradation of signaling adaptors [2, 3] |
| Luciferase reporter assay | Transcription factor activity (e.g., IRF3, NF-kB) | Quantify immune response suppression [3, 4] |
| Confocal microscopy | Subcellular localization and aggregation | Visualize MAVS aggregation inhibited by WDR77 |
| Flow cytometry | Immune cell activation markers | Assess T cell responses and IL-2 feedback |
| Co-immunoprecipitation | Protein-protein interactions | Confirm E3 ligase-substrate relationships |
CRISPR knockout screening
Genome-wide CRISPR knockout screens can identify genes that negatively regulate immune response. For example, screens in Drosophila cells have uncovered both positive and negative regulators of the immune response. In mammalian cells, similar screens can be used to find novel negative regulators of antiviral or inflammatory pathways.
RNA-seq and transcriptomics
RNA sequencing can reveal transcriptional changes in immune cells upon perturbation of candidate negative regulators. For instance, knockout of SOCS proteins leads to altered expression of interferon-stimulated genes. This method helps define the downstream effects of negative regulation.
Proteomics and interactomics
Mass spectrometry-based proteomics can identify protein-protein interactions and post-translational modifications involved in negative regulation. For example, the interaction between RNF5 and MAVS was likely identified through such approaches. Similarly, degradation of YTHDF2 by FMDV VP1 was demonstrated using proteomic and autophagy assays.
Imaging and reporter assays
Live-cell imaging of tagged proteins (e.g., GFP-MAVS) can visualize aggregation and localization during negative regulation. Reporter assays for interferon or NF-kB activation are commonly used to quantify immune response suppression [3, 4].
How CRISPR Can Be Used to Study GO:0050777 negative regulation of immune response
Knockout
CRISPR knockout of candidate negative regulators (e.g., RNF5, SOCS1) can be used to assess their role in immune response. For example, RNF5 knockout in black carp cells would be expected to enhance MAVS-mediated antiviral signaling. Similarly, SOCS1 knockout leads to prolonged JAK-STAT activation.
Point Mutation
Point mutations can dissect specific domains or residues required for negative regulation. For instance, mutating the catalytic cysteine of RNF5 would abolish its E3 ligase activity, preventing MAVS degradation. Such models help distinguish enzymatic from scaffolding functions.
Knock-in
Knock-in of tagged versions (e.g., GFP, HA) of negative regulators allows visualization and biochemical analysis. For example, a GFP-MAVS knock-in cell line can be used to monitor aggregation in real time upon WDR77 expression. Knock-in of viral proteins (e.g., FMDV VP1) can model viral evasion.
Overexpression
Overexpression of negative regulators (e.g., WDR77, finTRIM82) can suppress immune signaling and viral replication. For example, overexpression of WDR77 inhibits MAVS aggregation and limits antiviral innate immune response. Overexpression of finTRIM82 negatively regulates interferon response in grouper cells.
How EDITGENE Supports negative regulation of immune response Research
Researchers studying negative regulation of immune response-related genes often need to determine whether a candidate gene is causally involved in suppressing immune signaling. EDITGENE provides a comprehensive suite of CRISPR services to generate precisely engineered cell models, enabling functional validation of negative regulators in relevant immune contexts.
Contact EDITGENE today to design your custom CRISPR model for negative regulation of immune response research.
Frequently Asked Questions About negative regulation of immune response
What is negative regulation of immune response (GO:0050777)?
It is any process that stops, prevents, or reduces the frequency, rate or extent of the immune response, the immunological reaction of an organism to an immunogenic stimulus.
What genes are involved in negative regulation of immune response?
Key genes include RNF5, YTHDF2, WDR77, SOCS1, SOCS3, IL-2, and finTRIM82, among others [2, 3, 4, 6, 7, 8].
How does negative regulation of immune response prevent autoimmunity?
By restraining self-reactive immune cells and limiting excessive inflammation, negative regulation helps maintain tolerance and prevent tissue damage [1, 5, 6].
What diseases are associated with defective negative regulation of immune response?
Defective negative regulation can contribute to autoimmunity, chronic inflammation, and increased susceptibility to viral infections [2, 4, 5, 8].
How do viruses exploit negative regulation of immune response?
Viruses can encode proteins that enhance negative regulation, such as FMDV VP1 degrading YTHDF2 to suppress IRF3, or finTRIM82 inhibiting interferon response [2, 4].
What is the role of SOCS proteins in negative regulation of immune response?
SOCS proteins are induced by cytokines and inhibit JAK-STAT signaling, thereby dampening innate immune responses caused by viruses.
How can CRISPR be used to study negative regulation of immune response?
CRISPR knockout, point mutation, knock-in, and overexpression models allow functional dissection of candidate negative regulators in immune cells [1, 2, 3, 4, 7, 8].
What model organisms are used to study negative regulation of immune response?
Drosophila, fish (e.g., black carp, orange spotted grouper), and mammalian cell lines are commonly used [1, 3, 4].
What is the quantal theory of immunity?
It is a theory proposing that IL-2 produced by activated T cells acts as a negative feedback regulator to limit the immune response.
How does WDR77 negatively regulate antiviral innate immunity?
WDR77 inhibits prion-like aggregation of MAVS, thereby limiting antiviral innate immune response.
Conclusion
Negative regulation of immune response (GO:0050777) is a fundamental biological process that balances immune activation and suppression. It involves diverse mechanisms, from E3 ligase-mediated degradation of signaling adaptors to cytokine feedback and SOCS-mediated inhibition [1, 2, 3, 6, 7, 8]. Dysregulation of this process is linked to viral pathogenesis, autoimmunity, and chronic inflammation [2, 4, 5, 8]. By leveraging CRISPR-based models and functional genomics, researchers can uncover new negative regulators and translate these findings into therapeutic strategies. EDITGENE stands ready to support these efforts with custom cell models and screening services.
References
- 1. Aggarwal K et al.. 2008. Positive and negative regulation of the Drosophila immune response.. BMB Rep 41(4):267-77 PMID: 18452646
- 2. Liu H et al.. 2024. Foot-and-mouth disease virus VP1 degrades YTHDF2 through autophagy to regulate IRF3 activity for viral replication.. Autophagy 20(7):1597-1615 PMID: 38516932
- 3. Yan J et al.. 2023. Negatively regulation of MAVS-mediated antiviral innate immune response by E3 ligase RNF5 in black carp.. Fish Shellfish Immunol 134:108583 PMID: 36740081
- 4. Lv S et al.. 2019. Negative regulation of the interferon response by finTRIM82 in the orange spotted grouper.. Fish Shellfish Immunol 88:391-402 PMID: 30853655
- 5. Vecchiarelli A. 2000. Cytokines and costimulatory molecules: positive and negative regulation of the immune response to Cryptococcus neoformans.. Arch Immunol Ther Exp (Warsz) 48(6):465-72 PMID: 11197600
- 6. Smith KA et al.. 2008. The quantal theory of immunity and the interleukin-2-dependent negative feedback regulation of the immune response.. Immunol Rev 224:124-40 PMID: 18759924
- 7. Li J et al.. 2023. WDR77 inhibits prion-like aggregation of MAVS to limit antiviral innate immune response.. Nat Commun 14(1):4824 PMID: 37563140
- 8. Huang S et al.. 2020. SOCS Proteins Participate in the Regulation of Innate Immune Response Caused by Viruses.. Front Immunol 11:558341 PMID: 33072096
