GO:0002675 positive regulation of acute inflammatory response: Signaling Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0002675 describes any process that activates or increases the frequency, rate, or extent of an acute inflammatory response.
• Acute inflammatory responses are rapid, self-limiting reactions to infection or tissue injury, and their positive regulation is essential for host defense.
• Key positive regulators include cytokines such as TNF and IL-1β, pattern recognition receptors like NLRP3, and transcription factors such as NF-κB.
• Dysregulated positive regulation drives sepsis, acute kidney injury, acute lung injury, and chronic inflammatory diseases.
• Epigenetic mechanisms, including histone methylation by EZH2 and nuclear stress body assembly, fine-tune the intensity of acute inflammation.
• CRISPR-based knockout, knock-in, and overexpression models are powerful tools to dissect causal roles of specific genes in GO:0002675.
Description
The Gene Ontology term GO:0002675, positive regulation of acute inflammatory response, refers to any biological process that activates or increases the frequency, rate, or extent of an acute inflammatory response. Acute inflammation is a rapid, short-lived protective reaction to harmful stimuli such as pathogens or tissue damage, and its positive regulation ensures timely immune activation. This term is critical for researchers studying host defense, sepsis, and inflammatory diseases because excessive or uncontrolled positive regulation can lead to tissue injury and organ failure. Understanding the molecular players that positively regulate acute inflammation is essential for developing targeted therapies.
positive regulation of acute inflammatory response At A Glance
| GO ID | GO:0002675 |
|---|---|
| GO term | positive regulation of acute inflammatory response |
| Ontology | biological_process |
| Synonym | activation of acute inflammatory response; stimulation of acute inflammatory response; up regulation of acute inflammatory response; up-regulation of acute inflammatory response; upregulation of acute inflammatory response |
| Major function | Activates or increases the frequency, rate, or extent of an acute inflammatory response |
| Related process | acute inflammatory response (GO:0002526) |
| Regulatory direction | Positive (up-regulation) |
| Taxonomic scope | All organisms with an immune system |
What Is GO:0002675?
GO:0002675 is a biological process term defined as any process that activates or increases the frequency, rate, or extent of an acute inflammatory response. In other words, it encompasses all molecular events that amplify or sustain the early, rapid inflammatory reaction to infection or injury, without specifying the particular cell type or stimulus.
Why Is positive regulation of acute inflammatory response Important in Cell Biology?
Positive regulation of acute inflammatory response is a double-edged sword: it is required for clearing pathogens and initiating repair, but when excessive or prolonged it causes collateral tissue damage and drives diseases such as sepsis, acute kidney injury, and acute lung injury. Understanding its molecular mechanisms is therefore central to immunology and medicine, and CRISPR-based models enable precise dissection of causal genes.
• Essential for host defense against bacterial and viral infections.
• Drives pathology in sepsis and septic shock.
• Contributes to acute kidney injury through inflammatory mediators.
• Mediates acute lung injury and pulmonary inflammation.
• Involved in neurogenic inflammation and hyperalgesia.
• Modulated by epigenetic factors such as EZH2 and physical activity.
• Regulated by nuclear stress bodies and NFIL3 to prevent excessive inflammation.
• Target for anti-inflammatory drug development.
• Key area for CRISPR functional genomics screens.
• Links innate immunity to metabolic and cachexia syndromes.
What Happens During positive regulation of acute inflammatory response?
Initiation by Pattern Recognition Receptors
In simple terms: Sensors on immune cells detect danger signals and start the inflammatory alarm.
Positive regulation begins when pattern recognition receptors (PRRs) such as NLRP3 recognize pathogen-associated molecular patterns (PAMPs) or damage-associated molecular patterns (DAMPs). This triggers inflammasome assembly and downstream signaling that amplifies the acute inflammatory response.
Amplification via Cytokines and Chemokines
In simple terms: Immune cells release chemical messengers that recruit more immune cells and intensify inflammation.
Activated macrophages and other cells secrete pro-inflammatory cytokines such as TNF, IL-1β, and IL-6, which further activate endothelial cells and recruit neutrophils, thereby increasing the frequency and extent of the acute inflammatory response.
Transcriptional and Epigenetic Control
In simple terms: Master switches inside the cell turn inflammatory genes on or off.
Transcription factors such as NF-κB and epigenetic regulators like EZH2 modulate the expression of inflammatory genes. EZH2-mediated histone H3K27 methylation regulates apoptotic and inflammatory responses in sepsis-induced acute kidney injury, demonstrating epigenetic positive regulation.
Resolution and Negative Feedback
In simple terms: The body applies brakes to prevent inflammation from causing harm.
To avoid excessive damage, positive regulation is counterbalanced by anti-inflammatory mechanisms. Nuclear stress bodies rearrange and enhance NFIL3 expression to restrain acute inflammatory responses, illustrating an intrinsic brake on the system. Similarly, ATG16L1 restrains macrophage NLRP3 activation and alveolar epithelial cell injury during septic lung injury.
Key Genes Involved in GO:0002675 positive regulation of acute inflammatory response
The following genes and proteins are experimentally validated participants in positive regulation of acute inflammatory response, as supported by the cited literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| EZH2 | Histone methyltransferase that regulates apoptotic and inflammatory responses | Epigenetic control of acute inflammation in sepsis-induced AKI |
| ATG16L1 | Autophagy-related protein that restrains NLRP3 activation | Negative regulator of macrophage inflammation in septic lung injury |
| NFIL3 | Transcription factor enhanced by nuclear stress bodies | Restrains acute inflammatory responses |
| NLRP3 | Inflammasome sensor that activates IL-1β and IL-18 | Central amplifier of acute inflammation |
| TNF | Pro-inflammatory cytokine | Key mediator of acute inflammatory response |
| IL1B | Pro-inflammatory cytokine | Amplifies acute inflammation |
| IL6 | Pro-inflammatory cytokine | Systemic marker of acute inflammation |
| NFKB1 | Transcription factor subunit | Master regulator of inflammatory gene expression |
| MARCH2 | E3 ubiquitin ligase that regulates TNF receptor 1 signaling | Reciprocal regulation of inflammatory damage |
| USP22 | Deubiquitinase that regulates TNF receptor 1 signaling | Modulates inflammatory responses |
| TGFB1 | Transforming growth factor beta | Regulates inflammatory lung injury and repair |
| TGFBR1 | TGF-beta receptor | Mediates TGF-beta signaling in inflammation |
| CXCL8 | Chemokine that recruits neutrophils | Promotes acute inflammatory cell infiltration |
| CCL2 | Chemokine that recruits monocytes | Amplifies acute inflammation |
| TLR4 | Pattern recognition receptor for LPS | Initiates acute inflammatory signaling |
| MYD88 | Adaptor protein in TLR signaling | Transduces inflammatory signals |
| NLRP3 | Inflammasome sensor | Amplifies acute inflammation |
How Is positive regulation of acute inflammatory response Regulated?
Positive regulation of acute inflammatory response is tightly controlled at multiple levels. Epigenetic modifiers such as EZH2 regulate inflammatory gene expression through histone methylation. Physical activity has been shown to modulate epigenetic regulation of inflammatory responses. At the post-transcriptional level, nuclear stress bodies rearrange to enhance NFIL3, which restrains acute inflammation. Autophagy-related proteins like ATG16L1 limit NLRP3 inflammasome activation. Additionally, ubiquitination and deubiquitination by MARCH2 and USP22 reciprocally regulate TNF receptor 1-mediated signaling and inflammatory damage. These layers of regulation ensure that acute inflammation is effective but self-limiting.
positive regulation of acute inflammatory response and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| EZH2 | Sepsis-induced acute kidney injury | Knockout mouse model with LPS injection |
| ATG16L1 | Septic lung injury | Macrophage-specific knockout |
| NFIL3 | Acute inflammatory response | Overexpression in macrophages |
| MARCH2 | Inflammatory lung damage | Knockout and knock-in mice |
| TGFB1 | Inflammatory lung injury and repair | Conditional knockout in lung epithelium |
Sepsis and Acute Kidney Injury
Sepsis is a life-threatening condition characterized by excessive acute inflammation. EZH2 regulates apoptotic and inflammatory responses in sepsis-induced acute kidney injury, and its modulation affects the severity of renal damage. ATG16L1 restrains macrophage NLRP3 activation and alveolar epithelial cell injury during septic lung injury, highlighting its protective role.
Acute Lung Injury and Pulmonary Inflammation
Transforming growth factors regulate inflammatory lung injury and repair, and dysregulated positive regulation of acute inflammation contributes to acute respiratory distress syndrome. MARCH2 and USP22 reciprocally regulate TNF receptor 1-mediated signaling and inflammatory damages in lung tissue.
Neurogenic Inflammation and Pain
Neurotrophins such as nerve growth factor (NGF) are involved in hyperalgesia, a condition where acute inflammatory mediators sensitize nociceptors. This links positive regulation of acute inflammatory response to pain pathways.
Cachexia and Chronic Inflammatory States
Cachexia is a complex metabolic syndrome associated with chronic inflammation, where persistent positive regulation of acute inflammatory mediators contributes to muscle wasting.
From positive regulation of acute inflammatory response-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X positively regulate acute inflammation? | CRISPR knockout in macrophage cell line (e.g., RAW264.7) followed by LPS stimulation |
| Does a point mutation in gene Y alter inflammatory signaling? | CRISPR point mutation knock-in in primary macrophages |
| Does overexpression of gene Z amplify acute inflammation? | CRISPRa overexpression in epithelial cells |
| Does a tagged version of protein W localize to inflammasome? | Knock-in of fluorescent tag (e.g., GFP) |
| Which genes are essential for NLRP3 activation? | Genome-wide CRISPR library screening in THP-1 cells |
| Does epigenetic modifier EZH2 control inflammatory gene expression? | Knockout and rescue with wild-type or mutant EZH2 |
How to Study the positive regulation of acute inflammatory response Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | Transcriptional changes | Identify inflammatory gene expression signatures |
| Proteomics | Protein abundance and modifications | Quantify cytokine production |
| Cytokine array | Secretion of inflammatory mediators | Measure TNF, IL-6, IL-1β levels |
| Immunofluorescence | Localization of inflammasome components | Visualize NLRP3 speck formation |
| Flow cytometry | Immune cell activation markers | Assess neutrophil recruitment |
| CRISPR screen | Gene essentiality for inflammatory response | Discover novel regulators |
| Western blot | Protein expression and signaling | Detect NF-κB activation |
Transcriptomic Profiling (RNA-seq)
RNA sequencing measures global changes in gene expression upon activation or inhibition of positive regulation of acute inflammatory response. It identifies inflammatory gene signatures and pathways.
Proteomic and Cytokine Arrays
Proteomics and cytokine arrays quantify secreted inflammatory mediators such as TNF, IL-6, and IL-1β, providing functional readouts of acute inflammation.
Imaging of Inflammatory Cell Recruitment
Intravital microscopy and immunofluorescence can visualize neutrophil infiltration and inflammasome assembly in tissues, directly assessing the extent of acute inflammation.
CRISPR Screening and Functional Genomics
Pooled CRISPR knockout or activation screens identify novel positive regulators of acute inflammatory response. These screens are powerful for discovering drug targets.
How CRISPR Can Be Used to Study GO:0002675 positive regulation of acute inflammatory response
Knockout
CRISPR knockout is used to delete candidate genes and assess their requirement for positive regulation of acute inflammatory response. For example, EZH2 knockout in sepsis models reveals its role in inflammatory kidney injury. ATG16L1 knockout exacerbates NLRP3 activation.
Point Mutation
CRISPR point mutation introduces specific amino acid changes to dissect functional domains. This is useful for studying phosphorylation sites or catalytic residues in inflammatory signaling proteins such as MARCH2 and USP22.
Knock-in
Knock-in of reporter tags (e.g., GFP, luciferase) allows real-time monitoring of inflammatory gene expression. Tagging endogenous NFIL3 or NLRP3 enables tracking of their dynamics during acute inflammation.
Overexpression
CRISPR activation (CRISPRa) or cDNA overexpression can elevate gene expression to test sufficiency. Overexpressing NFIL3 restrains acute inflammation, while overexpressing pro-inflammatory cytokines amplifies it.
How EDITGENE Supports positive regulation of acute inflammatory response Research
Researchers studying positive regulation of acute inflammatory response-related genes often need to determine whether a candidate gene is causally involved in the inflammatory process. EDITGENE provides a comprehensive suite of CRISPR services to enable such functional studies with high precision and reproducibility.
Contact EDITGENE today to design your custom CRISPR model for positive regulation of acute inflammatory response research.
Frequently Asked Questions About positive regulation of acute inflammatory response
What is GO:0002675 positive regulation of acute inflammatory response?
GO:0002675 is a Gene Ontology biological process term defined as any process that activates or increases the frequency, rate, or extent of an acute inflammatory response.
What genes are involved in positive regulation of acute inflammatory response?
Key genes include EZH2, ATG16L1, NFIL3, NLRP3, TNF, IL1B, IL6, NFKB1, MARCH2, USP22, TGFB1, and TLR4, among others.
How is acute inflammatory response positively regulated?
It is positively regulated by pattern recognition receptors, cytokines, transcription factors like NF-κB, and epigenetic modifiers such as EZH2.
What diseases are associated with dysregulated positive regulation of acute inflammatory response?
Sepsis, acute kidney injury, acute lung injury, neurogenic inflammation, and cachexia are associated with dysregulated acute inflammation.
What is the role of EZH2 in acute inflammatory response?
EZH2 regulates apoptotic and inflammatory responses in sepsis-induced acute kidney injury through histone methylation.
How does ATG16L1 affect acute inflammation?
ATG16L1 restrains macrophage NLRP3 activation and alveolar epithelial cell injury during septic lung injury.
What are nuclear stress bodies and how do they regulate inflammation?
Nuclear stress bodies are nuclear structures that rearrange and enhance NFIL3 expression to restrain acute inflammatory responses.
Can CRISPR be used to study positive regulation of acute inflammatory response?
Yes, CRISPR knockout, knock-in, point mutation, and overexpression models are widely used to dissect gene function in acute inflammation.
What methods are used to measure positive regulation of acute inflammatory response?
RNA-seq, proteomics, cytokine arrays, imaging, and CRISPR screens are commonly used to measure and study acute inflammatory responses.
Why is positive regulation of acute inflammatory response important for drug discovery?
It is a key target for anti-inflammatory therapies, and understanding its regulators can lead to new treatments for sepsis and inflammatory diseases.
Conclusion
GO:0002675 positive regulation of acute inflammatory response is a fundamental biological process that amplifies the body's early immune reaction to infection and injury. Its precise control is critical for health, and its dysregulation underlies numerous inflammatory diseases. CRISPR-based functional genomics, combined with transcriptomics and proteomics, offers powerful approaches to identify and validate therapeutic targets within this pathway.
References
- 1. Li B et al.. 2023. Histone H3K27 methyltransferase EZH2 regulates apoptotic and inflammatory responses in sepsis-induced AKI.. Theranostics 13(6):1860-1875 PMID: 37064878
- 2. Bai Y et al.. 2025. ATG16L1 restrains macrophage NLRP3 activation and alveolar epithelial cell injury during septic lung injury.. Clin Transl Med 15(4):e70289 PMID: 40211890
- 3. Liu XQ et al.. 2025. De novo assembly of nuclear stress bodies rearranges and enhances NFIL3 to restrain acute inflammatory responses.. Cell 188(17):4586-4603.e31 PMID: 40436014
- 4. Kotler DP. 2000. Cachexia.. Ann Intern Med 133(8):622-34 PMID: 11033592
- 5. Shu XQ et al.. 1999. Neurotrophins and hyperalgesia.. Proc Natl Acad Sci U S A 96(14):7693-6 PMID: 10393882
- 6. Chakrabarti M et al.. 2025. Regulation of inflammatory lung injury and repair by transforming growth factors.. Am J Physiol Lung Cell Mol Physiol 329(5):L539-L554 PMID: 40920668
- 7. Li HF et al.. 2026. Reciprocal regulation of TNF receptor 1-mediated signaling and inflammatory damages by MARCH2 and USP22.. Proc Natl Acad Sci U S A 123(15):e2531389123 PMID: 41961857
- 8. Tarnowski M et al.. 2021. Epigenetic Regulation of Inflammatory Responses in the Context of Physical Activity.. Genes (Basel) 12(9) PMID: 34573295
