GO:0160028 negative regulation of pyroptotic inflammatory response: Mechanism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0160028 describes any process that decreases the frequency, rate or extent of a pyroptotic inflammatory response, a lytic pro-inflammatory cell death pathway [1,2].
• Negative regulation occurs at multiple nodes: inflammasome priming, caspase-1/GSDMD activation, and cytokine release, often through microRNAs, decoy receptors, or metabolic checkpoints [1,8].
• Key negative regulators include miR-223-3p, NLRP6, phospholipid transfer protein (PLTP), and HIF-1α-dependent pathways that suppress microglial pyroptosis [1,2,3,7].
• Dysregulation of this process is implicated in sepsis, radiation injury, cardiac dysfunction, and cerebral ischemia, making it a therapeutic target [1,2,3,7].
• CRISPR knockout, point mutation, knock-in, and overexpression models are essential to dissect causal roles of candidate regulators in pyroptosis [5,6].
• Studying GO:0160028 requires integrated methods: inflammasome assays, cytokine profiling, live-cell imaging of GSDMD pores, and transcriptomics [4,8].
Description
Pyroptosis is a lytic, pro-inflammatory form of programmed cell death executed by gasdermin proteins, most notably GSDMD, following inflammasome activation [1,5]. The resulting inflammatory response is critical for host defense but can cause tissue damage when unchecked. GO:0160028, negative regulation of pyroptotic inflammatory response, captures the biological processes that restrain this cascade [1,2]. Understanding these brakes is essential for therapeutic modulation in sepsis, ischemia, and inflammatory diseases [3,7].
negative regulation of pyroptotic inflammatory response At A Glance
| GO ID | GO:0160028 |
|---|---|
| GO term | negative regulation of pyroptotic inflammatory response |
| Ontology | biological_process |
| Synonym | negative regulation of pyroptosis |
| Major function | Suppresses the initiation, execution, or inflammatory output of pyroptosis |
| Key regulators | miR-223-3p, NLRP6, PLTP, HIF-1α, GSDMD, caspase-1, NLRP3 |
| Associated diseases | Sepsis, radiation injury, cardiac dysfunction, cerebral ischemia |
| Research methods | CRISPR KO/KI, inflammasome assays, cytokine profiling, imaging |
What Is GO:0160028?
GO:0160028 is a biological process term defined as any process that decreases the frequency, rate or extent of a pyroptotic inflammatory response. In practice, it encompasses molecular events that limit inflammasome assembly, caspase-1 activation, GSDMD cleavage, or the release of IL-1β and IL-18, thereby reducing pyroptosis-associated inflammation [1,2,8].
Why Is negative regulation of pyroptotic inflammatory response Important in Cell Biology?
Negative regulation of pyroptotic inflammatory response is vital for preventing excessive inflammation and tissue damage while preserving host defense. Its dysregulation contributes to sepsis, ischemia-reperfusion injury, and chronic inflammatory conditions [1,2,3,7]. Targeting these regulatory nodes offers therapeutic opportunities to dampen pyroptosis without fully compromising immunity [1,7].
• Prevents uncontrolled inflammation and tissue damage during infection [3,5].
• Limits radiation-induced inflammatory injury in macrophages.
• Protects against sepsis-induced cardiac dysfunction.
• Reduces cerebral ischemia damage by inhibiting microglial pyroptosis.
• Modulates host defense against polymicrobial sepsis.
• Influences bacterial replication restriction mechanisms.
• Regulates noncanonical inflammasome activation in Burkholderia infection.
• Controls cigarette smoke-induced macrophage cell death.
• Provides targets for anti-inflammatory therapeutics [1,2,7].
• Requires precise CRISPR models to dissect causal mechanisms [5,6].
What Happens During negative regulation of pyroptotic inflammatory response?
Inhibition of Inflammasome Priming and Assembly
In simple terms: The process blocks the first steps where danger sensors gather to start inflammation.
Negative regulation can occur at the level of inflammasome priming, where microRNAs such as miR-223-3p attenuate NLRP3 inflammasome activation in macrophages, reducing radiation-induced inflammatory responses. Similarly, NLRP6 negatively regulates host defense against polymicrobial sepsis, likely by modulating inflammasome-dependent pathways.
Suppression of Caspase-1 and GSDMD Activation
In simple terms: It stops the molecular scissors that cut gasdermin to form pores.
Phospholipid transfer protein (PLTP) ameliorates sepsis-induced cardiac dysfunction through NLRP3 inflammasome inhibition, indirectly limiting caspase-1 activation and GSDMD cleavage. CircHIPK3 promotes pyroptosis via the miR-193a-5p/GSDMD axis, and its negative regulation would suppress GSDMD-mediated pore formation.
Modulation of Noncanonical Inflammasome Pathways
In simple terms: It can also block alternative routes that trigger pyroptosis.
Guanylate-binding protein-dependent noncanonical inflammasome activation prevents Burkholderia thailandensis-induced multinucleated giant cell formation, indicating that negative regulation can occur through noncanonical caspase-4/5/11 pathways. Inflammasome-dependent mechanisms are also involved in sensing and restricting bacterial replication.
HIF-1α-Mediated Negative Regulation in Microglia
In simple terms: A hypoxia-responsive protein can put the brakes on microglial pyroptosis.
ROS-responsive, brain- and M1 microglia-targeting modified ginkgetin-loaded smart liposomes ameliorate cerebral ischemia by HIF-1α-mediated negative regulation of microglia pyroptosis, demonstrating a targeted therapeutic approach to enhance this negative regulation.
Caspase-8 and Alternative Cell Death Checkpoints
In simple terms: Other caspases can influence whether a cell commits to pyroptosis.
Caspase-8 activation by cigarette smoke induces pro-inflammatory cell death of human macrophages exposed to lipopolysaccharide, highlighting a context where caspase-8 may intersect with pyroptotic pathways and their negative regulation.
Key Genes Involved in GO:0160028 negative regulation of pyroptotic inflammatory response
The following genes and proteins are experimentally implicated in the negative regulation of pyroptotic inflammatory response or its associated pathways.
| Gene | Major Role | Research Relevance |
|---|---|---|
| miR-223-3p | Attenuates radiation-induced inflammatory response and inhibits NLRP3 inflammasome activation | Potential therapeutic mimic in radiation injury |
| NLRP6 | Negatively regulates host defense against polymicrobial sepsis | Inflammasome sensor with regulatory roles |
| PLTP | Ameliorates sepsis-induced cardiac dysfunction via NLRP3 inhibition | Metabolic regulator of inflammasome |
| HIF-1α | Mediates negative regulation of microglia pyroptosis in cerebral ischemia | Target for ischemia therapy |
| GSDMD | Executioner of pyroptosis; cleaved by caspases | Central to pore formation |
| NLRP3 | Inflammasome sensor forming platform for caspase-1 activation | Major target for negative regulation [1,7] |
| Caspase-1 | Cleaves GSDMD and pro-IL-1β/IL-18 | Effector of canonical pyroptosis |
| Caspase-8 | Can induce pro-inflammatory cell death in macrophages | Context-dependent regulator |
| CircHIPK3 | Promotes pyroptosis via miR-193a-5p/GSDMD axis | Negative regulation would suppress this axis |
| miR-193a-5p | Targets GSDMD in acinar cells | Potential negative regulator |
| Guanylate-binding proteins | Mediate noncanonical inflammasome activation | Regulate Burkholderia-induced cell death |
| IL-1β | Pro-inflammatory cytokine released during pyroptosis | Readout of pyroptotic response |
| IL-18 | Pro-inflammatory cytokine released during pyroptosis | Readout of pyroptotic response |
| AIM2 | Inflammasome sensor for cytosolic DNA | Involved in bacterial restriction |
| NLRC4 | Inflammasome sensor for bacterial flagellin | Involved in bacterial sensing |
| Caspase-11 | Noncanonical inflammasome caspase in mice | Mediates LPS-induced pyroptosis |
| Caspase-4/5 | Noncanonical inflammasome caspases in humans | Mediate LPS-induced pyroptosis |
How Is negative regulation of pyroptotic inflammatory response Regulated?
Negative regulation of pyroptotic inflammatory response is controlled at multiple levels. MicroRNAs such as miR-223-3p and miR-193a-5p modulate inflammasome components and GSDMD [1,8]. Metabolic and signaling proteins like PLTP and HIF-1α inhibit NLRP3 inflammasome or microglial pyroptosis [2,7]. Noncanonical pathways involving guanylate-binding proteins and caspases-4/5/11 are also subject to negative regulation. These layers provide opportunities for therapeutic intervention.
negative regulation of pyroptotic inflammatory response and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| NLRP3 | Sepsis-induced cardiac dysfunction | Cardiomyocyte-specific KO or overexpression |
| HIF-1α | Cerebral ischemia | Microglia-specific KO or knock-in |
| GSDMD | Pyroptosis in acinar cells | Acinar cell-specific KO or point mutation |
| miR-223-3p | Radiation-induced inflammation | Macrophage overexpression or sponge |
| NLRP6 | Polymicrobial sepsis | NLRP6 KO mice |
Sepsis and Cardiac Dysfunction
NLRP6 negatively regulates host defense against polymicrobial sepsis, and PLTP ameliorates sepsis-induced cardiac dysfunction through NLRP3 inflammasome inhibition [3,7]. Enhancing negative regulation may protect against sepsis-related organ damage.
Cerebral Ischemia
HIF-1α-mediated negative regulation of microglia pyroptosis reduces cerebral ischemia damage, as shown with ROS-responsive ginkgetin-loaded liposomes. This highlights a therapeutic strategy to boost negative regulation in stroke.
Radiation-Induced Injury
miR-223-3p attenuates radiation-induced inflammatory response and inhibits NLRP3 inflammasome activation in macrophages, suggesting that restoring this microRNA could mitigate radiation injury.
Bacterial Infections
Inflammasome-dependent mechanisms restrict bacterial replication, and noncanonical inflammasome activation prevents Burkholderia thailandensis-induced multinucleated giant cell formation [5,6]. Negative regulation must be balanced to avoid compromising host defense.
From negative regulation of pyroptotic inflammatory response-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X negatively regulate pyroptosis? | CRISPR knockout in macrophages, followed by inflammasome activation [1,5] |
| Does a point mutation in GSDMD affect pore formation? | Knock-in of mutant GSDMD in cell lines |
| Can overexpression of miR-223-3p suppress radiation-induced pyroptosis? | Lentiviral overexpression in macrophages |
| Does HIF-1α mediate negative regulation in microglia? | Microglia-specific HIF-1α knockout or knock-in |
| Does PLTP inhibit NLRP3 inflammasome in cardiac cells? | Cardiomyocyte overexpression or knockout |
| Does NLRP6 regulate host defense in sepsis? | NLRP6 knockout mice |
How to Study the negative regulation of pyroptotic inflammatory response Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Western blot | GSDMD cleavage, caspase-1 activation | Assess pyroptosis execution |
| ELISA | IL-1β and IL-18 release | Quantify inflammatory output |
| Flow cytometry | Cell death and surface markers | Detect pyroptotic cells |
| Live-cell imaging | Pore formation and membrane rupture | Visualize pyroptosis dynamics |
| RNA-seq | Global transcript changes | Identify negative regulators |
| Small RNA-seq | microRNA expression | Discover regulatory microRNAs [1,8] |
| CRISPR screening | Loss-of-function phenotypes | Unbiased identification of regulators [5,6] |
| Proteomics | Protein interactions and modifications | Map inflammasome complexes |
Inflammasome Activation Assays
Measure caspase-1 activity, IL-1β release, and GSDMD cleavage by Western blot after LPS/ATP stimulation to assess negative regulation [1,5].
Cytokine Profiling
Quantify IL-1β and IL-18 in supernatants by ELISA to determine the extent of pyroptotic inflammatory response.
Live-Cell Imaging of Pyroptosis
Use fluorescently tagged GSDMD or membrane permeability dyes to visualize pore formation and cell lysis in real time.
Transcriptomics and microRNA Profiling
RNA-seq and small RNA-seq identify regulators such as miR-223-3p and miR-193a-5p that modulate pyroptosis pathways [1,8].
How CRISPR Can Be Used to Study GO:0160028 negative regulation of pyroptotic inflammatory response
Knockout
CRISPR knockout of candidate negative regulators such as NLRP6 or PLTP in macrophages or cardiomyocytes can test whether their loss enhances pyroptosis [3,7].
Point Mutation
Introducing point mutations in GSDMD or caspase-1 can dissect domains required for negative regulation and pore formation.
Knock-in
Knock-in of tagged GSDMD or HIF-1α allows tracking of protein localization and stability during pyroptosis [2,8].
Overexpression
Overexpression of miR-223-3p or PLTP can validate their suppressive effects on inflammasome activation and pyroptotic inflammation [1,7].
How EDITGENE Supports negative regulation of pyroptotic inflammatory response Research
Researchers studying negative regulation of pyroptotic inflammatory response-related genes often need to determine whether a candidate gene is causally involved in suppressing inflammasome activation, GSDMD cleavage, or cytokine release. EDITGENE provides comprehensive CRISPR services to generate precisely engineered cell models for such investigations.
Contact EDITGENE today to design your custom CRISPR model for negative regulation of pyroptotic inflammatory response research.
Frequently Asked Questions About negative regulation of pyroptotic inflammatory response
What is GO:0160028?
GO:0160028 is the Gene Ontology term for negative regulation of pyroptotic inflammatory response, describing any process that decreases the frequency, rate or extent of pyroptosis-associated inflammation [1,2].
What genes are involved in negative regulation of pyroptotic inflammatory response?
Key genes include miR-223-3p, NLRP6, PLTP, HIF-1α, GSDMD, NLRP3, and caspase-1, among others [1,2,3,7,8].
How does miR-223-3p regulate pyroptosis?
miR-223-3p attenuates radiation-induced inflammatory response and inhibits NLRP3 inflammasome activation in macrophages.
What is the role of NLRP6 in sepsis?
NLRP6 negatively regulates host defense against polymicrobial sepsis, modulating inflammasome-dependent pathways.
Can HIF-1α suppress microglial pyroptosis?
Yes, HIF-1α mediates negative regulation of microglia pyroptosis in cerebral ischemia, as shown with targeted liposomes.
How is PLTP involved in cardiac dysfunction?
PLTP ameliorates sepsis-induced cardiac dysfunction through NLRP3 inflammasome inhibition.
What experimental models study this process?
CRISPR knockout, knock-in, point mutation, and overexpression models in macrophages, cardiomyocytes, and microglia are commonly used [1,2,7,8].
What methods measure pyroptotic inflammatory response?
ELISA for IL-1β/IL-18, Western blot for GSDMD cleavage, live-cell imaging for pore formation, and RNA-seq for regulators [5,8].
Is negative regulation of pyroptosis a therapeutic target?
Yes, enhancing negative regulation may treat sepsis, cerebral ischemia, and radiation injury [1,2,3,7].
What CRISPR services does EDITGENE offer for this research?
EDITGENE provides knockout, point mutation, knock-in, overexpression cell models, CRISPR library screening, and bioinformatics services [5,6].
Conclusion
GO:0160028, negative regulation of pyroptotic inflammatory response, is a critical biological process that restrains lytic inflammation. Its molecular players, including miR-223-3p, NLRP6, PLTP, and HIF-1α, offer promising therapeutic targets for sepsis, ischemia, and radiation injury [1,2,3,7]. Advanced CRISPR modeling and multi-omics approaches will continue to unravel its mechanisms and translational potential.
References
- 1. Zhang M et al.. 2023. MiR-223-3p attenuates radiation-induced inflammatory response and inhibits the activation of NLRP3 inflammasome in macrophages.. Int Immunopharmacol 122:110616 PMID: 37459784
- 2. Li X et al.. 2026. ROS-responsive, brain- and M1 microglia-targeting modified ginkgetin-loaded smart liposomes ameliorate cerebral ischemia by HIF-1α-mediated negative regulation of microglia pyroptosis.. Mater Today Bio 37:102870 PMID: 41716338
- 3. Ghimire L et al.. 2024. NLRP6 negatively regulates host defense against polymicrobial sepsis.. Front Immunol 15:1248907 PMID: 38720893
- 4. Cristaldi M et al.. 2023. Caspase-8 activation by cigarette smoke induces pro-inflammatory cell death of human macrophages exposed to lipopolysaccharide.. Cell Death Dis 14(11):773 PMID: 38007509
- 5. Andrade WA et al.. 2018. Inflammasome-dependent Mechanisms Involved in Sensing and Restriction of Bacterial Replication.. Curr Issues Mol Biol 25:99-132 PMID: 28875942
- 6. Dilucca M et al.. 2021. Guanylate-Binding Protein-Dependent Noncanonical Inflammasome Activation Prevents Burkholderia thailandensis-Induced Multinucleated Giant Cell Formation.. mBio 12(4):e0205421 PMID: 34399626
- 7. Wang J et al.. 2024. Phospholipid transfer protein ameliorates sepsis-induced cardiac dysfunction through NLRP3 inflammasome inhibition.. Open Med (Wars) 19(1):20240915 PMID: 38584827
- 8. Wang J et al.. 2020. CircHIPK3 Promotes Pyroptosis in Acinar Cells Through Regulation of the miR-193a-5p/GSDMD Axis.. Front Med (Lausanne) 7:88 PMID: 32318575
