GO:0060264 regulation of respiratory burst involved in inflammatory response: Mechanism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0060264 describes the biological process that modulates the rate, frequency, or extent of the respiratory burst during an inflammatory response, leading to NADPH oxidase-dependent production of superoxide, hydrogen peroxide, and hydroxyl radicals.
• The respiratory burst is a central innate immune defense mechanism used by neutrophils and macrophages to kill pathogens, and its dysregulation contributes to chronic inflammation and tissue damage.
• Key regulators include pro- and anti-inflammatory cytokines, which fine-tune the intensity and duration of the oxidative burst in human neutrophils.
• The NADPH oxidase complex (e.g., CYBB/gp91phox, NCF1, NCF2, NCF4, RAC1/2) is the principal enzymatic source of superoxide during the respiratory burst, and its assembly and activity are tightly regulated.
• Mitochondrial permeability transition pore and Arf6-mediated energy metabolism are emerging as additional layers of respiratory burst regulation in neutrophils.
• Studying GO:0060264 requires integrated approaches such as CRISPR knockout/knock-in models, live-cell imaging of ROS production, and transcriptomic/proteomic profiling of inflammatory pathways.
Description
The respiratory burst is a rapid increase in oxygen consumption that occurs in phagocytes such as neutrophils and macrophages during an inflammatory response, resulting in the production of reactive oxygen species (ROS) that kill invading microorganisms. The Gene Ontology term GO:0060264, regulation of respiratory burst involved in inflammatory response, captures any process that modulates the rate, frequency, or extent of this elevated metabolic activity, specifically the NADH-dependent production of hydrogen peroxide (H2O2), superoxide anions, and hydroxyl radicals. Understanding this regulatory process is critical because excessive or insufficient respiratory burst activity underlies a wide range of inflammatory and infectious diseases. At the molecular level, the respiratory burst is driven by the NADPH oxidase complex, which transfers electrons from NADPH to molecular oxygen to generate superoxide. Regulation occurs at multiple levels, including assembly of the oxidase complex, post-translational modifications, and modulation by cytokines and other inflammatory mediators. For example, pro-inflammatory cytokines such as TNF-alpha and IL-1beta can prime neutrophils for enhanced respiratory burst, while anti-inflammatory cytokines like IL-10 suppress it. Recent studies have also implicated metabolic regulators such as Arf6 in controlling neutrophil energy metabolism and respiratory burst capacity. Researchers studying GO:0060264 aim to dissect how specific genes and signaling pathways control ROS production during inflammation, with implications for developing therapies against chronic inflammatory diseases, immunodeficiencies, and infections. This article provides a comprehensive overview of the mechanisms, key genes, disease associations, and experimental methods used to investigate this process, with a focus on CRISPR-based approaches for functional validation.
regulation of respiratory burst involved in inflammatory response At A Glance
| GO ID | GO:0060264 |
|---|---|
| GO term | regulation of respiratory burst involved in inflammatory response |
| Ontology | biological_process |
| Synonym | regulation of respiratory burst involved in acute inflammatory response |
| Major function | Modulates the rate, frequency, or extent of NADH-dependent production of superoxide, H2O2, and hydroxyl radicals during inflammation |
| Cellular context | Primarily occurs in phagocytes such as neutrophils and macrophages |
| Key enzymatic source | NADPH oxidase complex (e.g., CYBB, NCF1, NCF2, NCF4, RAC1/2) |
| Regulatory inputs | Pro- and anti-inflammatory cytokines, metabolic signals, and mitochondrial factors |
| Disease relevance | Chronic granulomatous disease, inflammatory disorders, and infections |
What Is GO:0060264?
GO:0060264, regulation of respiratory burst involved in inflammatory response, is defined as any process that modulates the rate, frequency, or extent of a phase of elevated metabolic activity during which oxygen consumption increases as a defense response. This regulation leads to the production, by an NADH-dependent system, of hydrogen peroxide (H2O2), superoxide anions, and hydroxyl radicals. In simpler terms, it is the control of the oxidative burst that immune cells use to destroy pathogens during inflammation.
Why Is regulation of respiratory burst involved in inflammatory response Important in Cell Biology?
GO:0060264 is important because the respiratory burst is a double-edged sword in immunity: it is essential for killing pathogens, but its dysregulation can cause severe tissue damage and chronic inflammation. Understanding how this process is regulated at the molecular level can reveal therapeutic targets for inflammatory diseases, immunodeficiencies, and infections.
• Defects in respiratory burst regulation cause chronic granulomatous disease, characterized by recurrent bacterial and fungal infections.
• Excessive respiratory burst contributes to tissue damage in autoimmune and inflammatory conditions such as rheumatoid arthritis and inflammatory bowel disease.
• Cytokine-mediated regulation of respiratory burst is critical for balancing pathogen clearance and host tissue protection.
• Metabolic regulators like Arf6 link cellular energy status to neutrophil respiratory burst capacity, revealing crosstalk between metabolism and immunity.
• Mitochondrial permeability transition pore opening modulates oxidative burst and NETosis, connecting mitochondrial dysfunction to inflammatory responses.
• CD38, an NAD+ glycohydrolase, influences immune cell metabolism and may impact respiratory burst regulation in inflammatory contexts such as COVID-19.
• Nicotinic receptor signaling can modulate neutrophil functions including respiratory burst at inflammatory sites.
• Tissue inhibitor of metalloproteinases 1 (TIMP1) is involved in ROS-mediated inflammation, highlighting extracellular matrix regulation of oxidative stress.
• CRISPR-based screens can identify novel regulators of GO:0060264, accelerating target discovery for anti-inflammatory therapies.
• Bioinformatics integration of transcriptomic and proteomic data can uncover signaling networks controlling respiratory burst.
What Happens During regulation of respiratory burst involved in inflammatory response?
Initiation and Priming of the Respiratory Burst
In simple terms: Before immune cells unleash their full oxidative attack, they get primed by signals from the inflammatory environment.
The respiratory burst in phagocytes is initiated upon exposure to inflammatory stimuli such as pathogens or cytokines. Priming agents, including pro-inflammatory cytokines like TNF-alpha and GM-CSF, enhance the responsiveness of neutrophils to subsequent activation. This priming involves phosphorylation events and translocation of cytosolic oxidase components to the membrane, preparing the cell for rapid ROS production. Studies have shown that Arf6 regulates energy metabolism in neutrophils, which may influence their capacity for respiratory burst.
Assembly and Activation of the NADPH Oxidase Complex
In simple terms: The enzyme complex that produces ROS must be assembled from multiple parts before it can work.
The NADPH oxidase complex is composed of membrane-bound subunits (CYBB/gp91phox and CYBA/p22phox) and cytosolic subunits (NCF1/p47phox, NCF2/p67phox, NCF4/p40phox, and RAC1/2). Upon activation, the cytosolic subunits translocate to the membrane, where they assemble with the membrane components to form the active enzyme. This assembly is tightly regulated by phosphorylation and lipid interactions, ensuring that ROS production is spatially and temporally controlled.
Electron Transfer and ROS Production
In simple terms: Once assembled, the enzyme transfers electrons to oxygen to create superoxide, a reactive molecule that kills microbes.
The activated NADPH oxidase transfers electrons from NADPH to molecular oxygen, generating superoxide anions (O2-). Superoxide can spontaneously or enzymatically dismutate to hydrogen peroxide (H2O2), which can further react to form hydroxyl radicals (OH-). These ROS are highly toxic to phagocytosed pathogens. The regulation of this electron transfer step determines the intensity and duration of the respiratory burst.
Termination and Resolution of the Respiratory Burst
In simple terms: After the threat is neutralized, the oxidative burst must be shut down to prevent damage to the host.
Termination of the respiratory burst involves dephosphorylation of oxidase components, disassembly of the complex, and scavenging of ROS by antioxidants. Anti-inflammatory cytokines such as IL-10 promote resolution by suppressing oxidase activity. Mitochondrial permeability transition pore opening has been implicated in regulating oxidative burst and NETosis, suggesting a role for mitochondrial signals in termination. Dysregulation of termination can lead to chronic inflammation and tissue injury.
Regulation by Cytokines and Inflammatory Mediators
In simple terms: Chemical signals from the immune system can turn the respiratory burst up or down.
Pro-inflammatory cytokines (e.g., TNF-alpha, IL-1beta, IFN-gamma) generally enhance respiratory burst capacity, while anti-inflammatory cytokines (e.g., IL-10, TGF-beta) suppress it. Nicotinic receptor signaling has also been shown to modulate neutrophil functions, including respiratory burst, at inflammatory sites. CD38, which regulates NAD+ levels, may influence immune cell metabolism and oxidative burst in conditions like COVID-19. These regulatory inputs ensure that ROS production is appropriate to the inflammatory context.
Key Genes Involved in GO:0060264 regulation of respiratory burst involved in inflammatory response
The following genes and proteins are key players in the regulation of respiratory burst involved in inflammatory response, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| CYBB | Membrane subunit gp91phox of NADPH oxidase; catalytic core | Mutations cause chronic granulomatous disease; target for functional studies |
| CYBA | Membrane subunit p22phox; stabilizes gp91phox | Essential for oxidase assembly; studied in inflammation models |
| NCF1 | Cytosolic subunit p47phox; organizer of complex assembly | Phosphorylation target; regulates oxidase activation |
| NCF2 | Cytosolic subunit p67phox; activator of electron transfer | Required for superoxide production; disease relevance |
| NCF4 | Cytosolic subunit p40phox; modulates oxidase activity | Involved in fine-tuning ROS production |
| RAC1 | Small GTPase; regulates oxidase assembly and activity | Key switch for respiratory burst; studied in neutrophils |
| RAC2 | Hematopoietic-specific GTPase; activates NADPH oxidase | Mutations linked to immunodeficiency |
| ARF6 | Regulates energy metabolism in neutrophils | Links metabolic state to respiratory burst capacity |
| TNF | Pro-inflammatory cytokine; primes respiratory burst | Therapeutic target in inflammatory diseases |
| IL10 | Anti-inflammatory cytokine; suppresses respiratory burst | Regulates resolution of inflammation |
| CD38 | NAD+ glycohydrolase; modulates immune metabolism | Potential regulator of oxidative burst in COVID-19 |
| TIMP1 | Inhibitor of metalloproteinases; involved in ROS-mediated inflammation | Modulates extracellular matrix and oxidative stress |
| MMP1 | Matrix metalloproteinase; regulated by TIMP1 in ROS inflammation | Effector of tissue remodeling in inflammation |
| CHRNA7 | Nicotinic acetylcholine receptor subunit; modulates neutrophil functions | Regulates respiratory burst at inflammatory sites |
| VDAC1 | Mitochondrial porin; involved in permeability transition | Links mitochondrial dysfunction to oxidative burst |
| PPIF | Cyclophilin D; regulator of mitochondrial permeability transition pore | Modulates NETosis and oxidative burst |
How Is regulation of respiratory burst involved in inflammatory response Regulated?
The regulation of respiratory burst involved in inflammatory response is a multi-layered process. At the transcriptional level, expression of NADPH oxidase components can be induced by inflammatory stimuli. Post-translationally, phosphorylation of cytosolic subunits (e.g., NCF1) controls complex assembly. Cytokines provide an additional regulatory layer: pro-inflammatory cytokines enhance priming, while anti-inflammatory cytokines suppress activity. Metabolic regulators such as Arf6 influence neutrophil energy metabolism, thereby affecting respiratory burst capacity. Mitochondrial permeability transition pore opening, regulated by PPIF and VDAC1, modulates oxidative burst and NETosis. Nicotinic receptor signaling also contributes to regulation at inflammatory sites. Together, these mechanisms ensure that ROS production is tightly controlled in time and space.
regulation of respiratory burst involved in inflammatory response and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CYBB | Chronic granulomatous disease; defective respiratory burst | CRISPR knockout in HL-60 or PLB-985 cells; knock-in of patient mutations |
| NCF1 | CGD; impaired oxidase assembly | Point mutation knock-in in neutrophil-like cell lines |
| TNF | Rheumatoid arthritis; enhanced respiratory burst | Overexpression in macrophage cell lines; cytokine stimulation assays |
| IL10 | Inflammatory bowel disease; suppressed respiratory burst | Knockout in primary macrophages; ROS measurement |
| CD38 | COVID-19; immune dysregulation | CRISPR knockout in monocytes; NAD+ and ROS profiling |
Chronic Granulomatous Disease (CGD)
Chronic granulomatous disease is a primary immunodeficiency caused by mutations in NADPH oxidase components (e.g., CYBB, NCF1, NCF2, CYBA), leading to defective respiratory burst and recurrent bacterial and fungal infections. Studying GO:0060264 helps understand how loss of regulation contributes to CGD pathology and guides gene therapy approaches.
Inflammatory and Autoimmune Diseases
Excessive or poorly regulated respiratory burst contributes to tissue damage in autoimmune diseases such as rheumatoid arthritis and inflammatory bowel disease. Cytokine imbalances, such as elevated TNF-alpha or reduced IL-10, can exacerbate oxidative stress. Targeting regulators of GO:0060264 may offer therapeutic strategies to dampen chronic inflammation.
COVID-19 and Metabolic Dysregulation
CD38, an NAD+ glycohydrolase, has been implicated in immune dysregulation during COVID-19, potentially affecting respiratory burst and inflammatory responses. Understanding how CD38 modulates GO:0060264 could inform treatments for severe viral infections.
Mitochondrial Dysfunction and NETosis
Mitochondrial permeability transition pore opening regulates oxidative burst and NETosis in neutrophils, linking mitochondrial dysfunction to inflammatory pathologies. This connection expands the scope of GO:0060264 to include mitochondrial regulators as modulators of respiratory burst.
From regulation of respiratory burst involved in inflammatory response-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of CYBB abolish respiratory burst? | CRISPR knockout in PLB-985 or HL-60 cells differentiated to neutrophils |
| How do patient mutations in NCF1 affect oxidase assembly? | Point mutation knock-in in neutrophil-like cell lines |
| Can a tagged NCF1 reveal real-time complex assembly? | Knock-in of fluorescent tag (e.g., GFP) at NCF1 locus |
| Does overexpression of RAC2 enhance ROS production? | Overexpression in macrophage cell lines; live-cell ROS imaging |
| What is the role of Arf6 in neutrophil energy metabolism? | CRISPR knockout or overexpression in primary neutrophils |
| How does CD38 modulate respiratory burst in COVID-19? | Knockout in monocyte-derived macrophages; SARS-CoV-2 infection model |
How to Study the regulation of respiratory burst involved in inflammatory response Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Luminol chemiluminescence | Extracellular and intracellular ROS production | Quantifying respiratory burst in neutrophils |
| DCFH-DA flow cytometry | Intracellular ROS levels | High-throughput screening of genetic variants |
| Subcellular fractionation | Translocation of cytosolic oxidase subunits | Assessing oxidase assembly |
| Phospho-specific immunoblotting | Phosphorylation status of NCF1 and other subunits | Monitoring activation state |
| RNA-seq | Transcriptional changes in inflammatory pathways | Identifying regulators of GO:0060264 |
| CRISPR knockout screens | Genes required for respiratory burst | Discovery of novel regulators |
| Live-cell imaging | Real-time ROS production and localization | Kinetic analysis of respiratory burst |
| Co-immunoprecipitation | Protein-protein interactions in oxidase complex | Validating assembly and regulation |
Live-Cell Imaging of ROS Production
Live-cell imaging using fluorescent probes such as DCFH-DA or luminol-based chemiluminescence allows real-time monitoring of respiratory burst in neutrophils and macrophages. This method can quantify the kinetics of ROS production and assess the impact of genetic perturbations.
Transcriptomic and Proteomic Profiling
RNA-seq and mass spectrometry-based proteomics can identify global changes in gene and protein expression associated with respiratory burst regulation. These approaches reveal signaling networks and potential therapeutic targets.
CRISPR Screens for Regulators
Genome-wide CRISPR knockout or activation screens coupled with ROS-sensitive reporters can uncover novel regulators of GO:0060264. Hits can be validated individually using targeted knockout or overexpression.
Functional Assays for Oxidase Assembly
Subcellular fractionation and co-immunoprecipitation can assess translocation of cytosolic subunits (e.g., NCF1, NCF2) to the membrane upon activation. Phosphorylation-specific antibodies can monitor post-translational modifications.
How CRISPR Can Be Used to Study GO:0060264 regulation of respiratory burst involved in inflammatory response
Knockout
CRISPR knockout of candidate genes (e.g., CYBB, NCF1, ARF6) in neutrophil-like cell lines or primary macrophages can definitively test their requirement for respiratory burst. Knockout models help distinguish essential versus redundant regulators.
Point Mutation
Introducing patient-specific point mutations (e.g., in CYBB or NCF1) via CRISPR base editing or homology-directed repair allows precise modeling of CGD and other disorders. These models reveal how single amino acid changes affect oxidase assembly and ROS production.
Knock-in
Knock-in of fluorescent tags (e.g., GFP, mCherry) at endogenous loci (e.g., NCF1, NCF2) enables real-time tracking of protein localization and complex assembly during respiratory burst. This approach provides spatial and temporal resolution in live cells.
Overexpression
CRISPR activation (CRISPRa) or lentiviral overexpression of genes such as RAC2 or TNF can enhance respiratory burst and model inflammatory conditions. Overexpression studies help identify sufficiency and gain-of-function effects.
How EDITGENE Supports regulation of respiratory burst involved in inflammatory response Research
Researchers studying regulation of respiratory burst involved in inflammatory response-related genes often need to determine whether a candidate gene is causally involved in ROS production, how mutations affect oxidase assembly, or whether overexpression enhances inflammatory responses. EDITGENE provides comprehensive CRISPR-based services to address these questions with precision and reproducibility.
Contact EDITGENE today to design your custom CRISPR model for regulation of respiratory burst involved in inflammatory response research.
Frequently Asked Questions About regulation of respiratory burst involved in inflammatory response
What is GO:0060264 regulation of respiratory burst involved in inflammatory response?
GO:0060264 is a Gene Ontology biological process term that describes any process modulating the rate, frequency, or extent of the respiratory burst during inflammation, leading to NADH-dependent production of superoxide, hydrogen peroxide, and hydroxyl radicals.
What genes are involved in regulation of respiratory burst involved in inflammatory response?
Key genes include CYBB, CYBA, NCF1, NCF2, NCF4, RAC1, RAC2, ARF6, TNF, IL10, CD38, and others that regulate NADPH oxidase assembly and activity.
How is the respiratory burst regulated in neutrophils?
It is regulated by priming with pro-inflammatory cytokines, phosphorylation of cytosolic subunits, assembly of the NADPH oxidase complex, and termination by anti-inflammatory signals.
What diseases are associated with defective respiratory burst regulation?
Chronic granulomatous disease, inflammatory bowel disease, rheumatoid arthritis, and severe COVID-19 have been linked to dysregulated respiratory burst.
What is the role of NADPH oxidase in respiratory burst?
NADPH oxidase transfers electrons from NADPH to oxygen to produce superoxide, the primary ROS in respiratory burst.
How can CRISPR be used to study respiratory burst regulation?
CRISPR knockout, knock-in, point mutation, and overexpression models allow functional dissection of genes involved in GO:0060264.
What methods measure respiratory burst in cells?
Luminol chemiluminescence, DCFH-DA flow cytometry, live-cell imaging, and subcellular fractionation are commonly used.
What is the role of Arf6 in neutrophil respiratory burst?
Arf6 regulates energy metabolism in neutrophils, which can influence their capacity for respiratory burst.
How do cytokines regulate respiratory burst?
Pro-inflammatory cytokines like TNF-alpha enhance priming, while anti-inflammatory cytokines like IL-10 suppress oxidase activity.
What is the connection between mitochondrial permeability transition pore and respiratory burst?
Mitochondrial permeability transition pore opening is involved in oxidative burst and NETosis in human neutrophils.
Conclusion
GO:0060264, regulation of respiratory burst involved in inflammatory response, is a critical biological process that balances pathogen killing and tissue protection. Its dysregulation contributes to immunodeficiency, chronic inflammation, and metabolic disorders. Advances in CRISPR-based models and multi-omics profiling are accelerating the discovery of novel regulators and therapeutic targets. EDITGENE provides end-to-end solutions to study this process with precision and scale.
References
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