GO:0098759 cellular response to interleukin-8: Signaling Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0098759 (cellular response to interleukin-8) describes any process by which a cell changes its state or activity in response to an interleukin-8 (IL-8/CXCL8) stimulus.
• IL-8 signals mainly through the G-protein-coupled receptors CXCR1 and CXCR2, activating MAPK, PI3K/AKT and other cascades that drive chemotaxis, degranulation and gene expression.
• The pathway is central to neutrophil recruitment and is implicated in inflammatory diseases, bacterial pneumonia, periodontitis and multiple cancers.
• In tumors, CXCL8 signaling can orchestrate natural killer cell-dependent antitumor immunity after radiotherapy and mediate immunotherapy resistance in hepatocellular carcinoma.
• Viruses such as EV-D68, rhinovirus and influenza exploit the CXCL8/MAPK/hnRNP-K axis to enhance infection, linking this GO term to antiviral research.
• CRISPR knockout, knock-in, point-mutation and overexpression models enable causal dissection of IL-8 response genes in relevant cell types.
Description
Interleukin-8 (IL-8), also known as CXCL8, is a CXC-family chemokine that acts as a master regulator of neutrophil recruitment and activation during inflammation. The Gene Ontology term GO:0098759, cellular response to interleukin-8, captures the full set of cellular changes that occur when a cell senses IL-8, including movement, secretion, enzyme production and gene expression. Because IL-8 signals through the G-protein-coupled receptors CXCR1 and CXCR2, the response engages multiple intracellular cascades and is relevant to immunology, infectious disease and oncology. Researchers study GO:0098759 to understand how cells interpret inflammatory cues and how dysregulated IL-8 responses contribute to disease. Large-scale single-cell transcriptome atlases of bacterial pneumonia have revealed coordinated immune programs in which IL-8-responsive cells participate, while intestinal epithelial studies show that lipopolysaccharides from different bacterial species modulate permeability and inflammation in species-specific ways. In cancer, radiotherapy can orchestrate natural killer cell-dependent antitumor immune responses through CXCL8, and targeting myeloid IL-8/CXCR2 signaling can overcome immunotherapy resistance in hepatocellular carcinoma. Mechanistically, the cellular response to IL-8 involves receptor binding, G-protein activation, MAPK and PI3K signaling, transcriptional reprogramming and cytoskeletal rearrangement. Viral pathogens such as EV-D68, rhinovirus and influenza can hijack the CXCL8/MAPK/hnRNP-K axis to promote infection, and cholinergic signaling can attenuate pro-inflammatory IL-8 responses in colonic epithelial cells. Genetic variation in IL8 haplotypes further modulates lymphocyte and macrophage responses to gram-negative periodontopathogens. Together, these findings make GO:0098759 a high-value target for CRISPR-based functional genomics.
cellular response to interleukin-8 At A Glance
| GO ID | GO:0098759 |
|---|---|
| GO term | cellular response to interleukin-8 |
| Ontology | biological_process |
| Synonym | cellular response to IL-8 |
| Major function | Mediates cellular changes such as chemotaxis, secretion, enzyme production and gene expression triggered by IL-8/CXCL8 |
| Primary receptors | CXCR1 and CXCR2, G-protein-coupled receptors for IL-8 |
| Key signaling modules | MAPK, PI3K/AKT and hnRNP-K-associated pathways |
| Representative cell types | Neutrophils, lymphocytes, macrophages, epithelial cells and tumor-associated myeloid cells |
| Disease relevance | Inflammation, bacterial pneumonia, periodontitis, viral infection and cancer immunotherapy resistance |
What Is GO:0098759?
GO:0098759 (cellular response to interleukin-8) is defined as any process that results in a change in state or activity of a cell, in terms of movement, secretion, enzyme production, gene expression and similar outputs, as a result of an interleukin-8 stimulus. The synonym cellular response to IL-8 is used interchangeably.
Why Is cellular response to interleukin-8 Important in Cell Biology?
GO:0098759 is important because IL-8 is one of the most potent neutrophil chemoattractants and a central amplifier of inflammatory responses, so understanding how cells respond to IL-8 is essential for immunology, infectious disease and cancer research. The pathway shapes outcomes in bacterial pneumonia, intestinal inflammation, periodontitis, viral infections and tumor immunity, making it a recurring node in both mechanistic studies and therapeutic development.
• IL-8 is a primary neutrophil chemoattractant, so GO:0098759 underpins acute inflammatory cell recruitment.
• The response is activated by bacterial and viral stimuli, linking it to infectious disease research.
• CXCL8 signaling after radiotherapy can orchestrate natural killer cell-dependent antitumor immunity.
• Myeloid IL-8/CXCR2 signaling contributes to immunotherapy resistance in hepatocellular carcinoma.
• Cholinergic signaling can attenuate pro-inflammatory IL-8 responses in colonic epithelial cells, revealing endogenous control mechanisms.
• IL8 haplotypes alter lymphocyte and macrophage responses to gram-negative periodontopathogens, connecting genetics to function.
• The pathway is druggable, and pharmacological intervention efforts targeting CXCL8 are actively pursued.
• CRISPR screens and knockout models can identify which genes are causally required for the IL-8 response.
What Happens During cellular response to interleukin-8?
IL-8 recognition by CXCR1 and CXCR2
In simple terms: The cell first detects IL-8 when the chemokine binds to its surface receptors.
The cellular response to interleukin-8 begins when IL-8/CXCL8 binds to the G-protein-coupled receptors CXCR1 and CXCR2 on the target cell surface. This receptor engagement is the initiating event that converts an extracellular chemokine gradient into intracellular signals, and the molecular and functional properties of CXCL8 and its receptors have been extensively reviewed.
G-protein activation and MAPK/PI3K signaling
In simple terms: Receptor binding switches on internal signaling cascades that relay the message to the cell interior.
Upon receptor activation, heterotrimeric G-proteins initiate downstream cascades including MAPK and PI3K/AKT pathways, which propagate the IL-8 signal to transcription factors and cytoskeletal regulators. The CXCL8/MAPK axis has been shown to interface with hnRNP-K, and this signaling module can be exploited by viruses such as EV-D68, rhinovirus and influenza to enhance infection in vitro.
Transcriptional and secretory reprogramming
In simple terms: The cell changes which genes it turns on and what it releases.
A hallmark of GO:0098759 is altered gene expression and secretion. In colonic epithelial cells, pro-inflammatory IL-8 responses can be attenuated by cholinergic signaling, demonstrating that the transcriptional output of the IL-8 response is subject to neural and pharmacological modulation. In lymphocytes and macrophages, IL8 haplotypes influence the functional response to gram-negative periodontopathogens, showing that genetic variation tunes the magnitude of the response.
Chemotaxis and effector cell recruitment
In simple terms: Cells move toward the IL-8 signal and bring in immune cells.
The cellular response to IL-8 includes directed cell movement and recruitment of effector cells such as neutrophils. Single-cell transcriptome atlases of bacterial pneumonia have revealed pan-immune programs consistent with chemokine-driven recruitment and activation, and intestinal epithelial studies show that lipopolysaccharides from different bacterial species modulate permeability and inflammation in species-specific ways that involve IL-8-related responses.
Tumor and tissue microenvironment effects
In simple terms: In tumors, the IL-8 response can change how the immune system attacks cancer.
In cancer, radiotherapy can orchestrate natural killer cell-dependent antitumor immune responses through CXCL8, while targeting myeloid IL-8/CXCR2 signaling can overcome immunotherapy resistance in hepatocellular carcinoma. These findings place GO:0098759 at the interface of inflammation, innate immunity and therapeutic response.
Key Genes Involved in GO:0098759 cellular response to interleukin-8
The following genes and proteins are central to the cellular response to interleukin-8 and are frequently studied in this pathway.
| Gene | Major Role | Research Relevance |
|---|---|---|
| CXCL8 | Encodes IL-8, the ligand that initiates the response | Core ligand for GO:0098759; target of pharmacological intervention efforts |
| CXCR1 | G-protein-coupled receptor for IL-8 | Mediates initial signal transduction in IL-8-responsive cells |
| CXCR2 | G-protein-coupled receptor for IL-8 | Central to myeloid IL-8 signaling and immunotherapy resistance |
| MAPK1 | Mitogen-activated protein kinase in the MAPK cascade | Propagates IL-8 signals and is hijacked by viruses via the CXCL8/MAPK/hnRNP-K axis |
| MAPK3 | Mitogen-activated protein kinase in the MAPK cascade | Contributes to IL-8-induced transcriptional reprogramming |
| PIK3CA | Catalytic subunit of PI3K | Links IL-8 receptor activation to PI3K/AKT signaling |
| AKT1 | Serine/threonine kinase downstream of PI3K | Transmits survival and metabolic signals in the IL-8 response |
| HNRNPK | RNA-binding protein in the CXCL8/MAPK axis | Implicated in viral exploitation of IL-8 signaling |
| NFKB1 | Transcription factor controlling inflammatory gene expression | Drives transcriptional output of the IL-8 response |
| RELA | NF-kB subunit | Participates in inflammatory gene induction downstream of IL-8 |
| IL8 haplotype variants | Genetic variants affecting IL-8 function | Modulate lymphocyte and macrophage responses to periodontopathogens |
| CHRM3 | Muscarinic receptor mediating cholinergic signaling | Cholinergic signaling attenuates pro-inflammatory IL-8 responses in colonic epithelial cells |
| CXCL12 | Related CXC chemokine | Studied alongside CXCL8 for molecular and functional properties |
| GNAI1 | G-protein alpha subunit | Participates in GPCR-mediated signaling from CXCR1/CXCR2 |
| ARRB1 | Beta-arrestin involved in GPCR desensitization | Regulates receptor trafficking after IL-8 binding |
| SRC | Non-receptor tyrosine kinase | Contributes to downstream signaling from IL-8 receptors |
| EGFR | Receptor tyrosine kinase | Cross-talks with chemokine signaling in inflammation and cancer |
How Is cellular response to interleukin-8 Regulated?
The cellular response to interleukin-8 is regulated at multiple levels. Receptor availability and desensitization control the strength and duration of signaling through CXCR1 and CXCR2. Cholinergic signaling can attenuate pro-inflammatory IL-8 responses in colonic epithelial cells, providing an endogenous brake on the pathway. Genetic variation in IL8 haplotypes modulates the functional response of lymphocytes and macrophages to gram-negative periodontopathogens, indicating that inherited sequence differences tune the response. In tumors, myeloid IL-8/CXCR2 signaling can be targeted to overcome immunotherapy resistance, showing that the pathway is pharmacologically tractable. Viral pathogens can also modulate the pathway, as the CXCL8/MAPK/hnRNP-K axis enables susceptibility to EV-D68, rhinovirus and influenza virus in vitro.
cellular response to interleukin-8 and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CXCL8 | Inflammatory disease and cancer | CXCL8 knockout or overexpression in epithelial and myeloid cell lines |
| CXCR2 | Hepatocellular carcinoma immunotherapy resistance | CXCR2 knockout in myeloid cells or co-culture with tumor cells |
| CXCL8/MAPK/hnRNP-K axis | Viral infection susceptibility | Knockdown or knockout of HNRNPK in airway epithelial cells followed by viral challenge |
| IL8 haplotypes | Periodontitis | Knock-in of haplotype variants in lymphocyte or macrophage models |
| CHRM3 | Colonic inflammation | Cholinergic agonist treatment in colonic epithelial cells with IL-8 readout |
Inflammation and infectious disease
GO:0098759 is central to inflammatory responses against pathogens. Single-cell transcriptome atlases of bacterial pneumonia have revealed pan-immune programs consistent with IL-8-driven recruitment and activation. Intestinal epithelial permeability and inflammation are modulated by lipopolysaccharides in a species-specific manner, implicating IL-8 responses in gut barrier biology. Periodontopathogen responses in lymphocytes and macrophages are influenced by IL8 haplotypes, linking the pathway to periodontal disease. Viral infections can exploit the CXCL8/MAPK/hnRNP-K axis, as shown for EV-D68, rhinovirus and influenza virus in vitro.
Cancer and immunotherapy
In oncology, radiotherapy can orchestrate natural killer cell-dependent antitumor immune responses through CXCL8. Targeting myeloid IL-8/CXCR2 signaling can overcome immunotherapy resistance in hepatocellular carcinoma. These studies position GO:0098759 as a determinant of immune checkpoint blockade efficacy and as a candidate pathway for combination therapy.
Therapeutic targeting of CXCL8
The molecular and functional properties of CXCL8 and CXCL12, their role in disease and efforts towards pharmacological intervention have been comprehensively reviewed. This makes the IL-8 response a validated area for drug discovery and for CRISPR-based target validation.
From cellular response to interleukin-8-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is CXCL8 required for neutrophil recruitment? | CXCL8 knockout cell line or organoid |
| Does CXCR2 mediate immunotherapy resistance? | CXCR2 knockout in myeloid cells co-cultured with tumor cells |
| Does a specific IL8 haplotype alter response magnitude? | Point-mutation or knock-in of the variant in a lymphocyte line |
| Can cholinergic signaling suppress IL-8 output? | Overexpression of cholinergic receptors in colonic epithelial cells |
| Is HNRNPK required for viral exploitation of IL-8 signaling? | HNRNPK knockout airway epithelial cells challenged with virus |
| Can CXCL8 be tagged for trafficking studies? | Tagged knock-in of CXCL8 in a secretory cell line |
How to Study the cellular response to interleukin-8 Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | Global gene expression changes after IL-8 stimulation | Defining the transcriptional program of GO:0098759 |
| Single-cell transcriptomics | Cell-type-specific responses in complex tissues | Mapping immune programs in bacterial pneumonia |
| Phospho-Western blot | Activation of MAPK and PI3K/AKT | Confirming signaling downstream of CXCR1/CXCR2 |
| ELISA | Secretion of IL-8 and other cytokines | Quantifying inflammatory output in epithelial cells |
| Chemotaxis assay | Directed cell migration toward IL-8 | Measuring the movement component of the response |
| CRISPR knockout | Loss-of-function effects on the IL-8 response | Testing causal roles of CXCR2, HNRNPK and other genes |
| CRISPR knock-in | Effects of specific sequence variants | Modeling IL8 haplotypes in lymphocytes or macrophages |
| Pharmacological inhibition | Druggability of the pathway | Evaluating CXCR1/CXCR2 antagonists and kinase inhibitors |
Transcriptomic profiling of the IL-8 response
RNA-seq and single-cell transcriptomics can capture the gene expression changes that define GO:0098759. Large-scale single-cell transcriptome atlases of bacterial pneumonia have been used to reveal pan-immune programs involving chemokine responses, and similar approaches can be applied to any IL-8-stimulated cell model.
Signaling pathway analysis
Western blotting and phospho-protein assays can measure MAPK and PI3K/AKT activation after IL-8 stimulation, as these cascades are core to the response. The CXCL8/MAPK/hnRNP-K axis can be interrogated by combining pathway inhibitors with viral challenge.
Functional assays for chemotaxis and secretion
Chemotaxis assays and cytokine secretion measurements (ELISA) quantify the movement and secretory outputs that characterize the cellular response to IL-8. These readouts are useful in epithelial, myeloid and lymphocyte models.
Genetic and pharmacological perturbation
CRISPR knockout, knock-in and overexpression, together with pharmacological inhibitors of CXCR1/CXCR2 or downstream kinases, allow causal testing of pathway components. Cholinergic agonists can be used to probe attenuation of the IL-8 response in colonic epithelial cells.
How CRISPR Can Be Used to Study GO:0098759 cellular response to interleukin-8
Knockout
CRISPR knockout of CXCL8, CXCR1, CXCR2 or downstream effectors such as HNRNPK can determine which components are required for the cellular response to interleukin-8. Knockout models are particularly useful for testing whether myeloid IL-8/CXCR2 signaling is necessary for immunotherapy resistance.
Point Mutation
Point mutations can be introduced to model IL8 haplotype variants that alter lymphocyte and macrophage responses to gram-negative periodontopathogens. Such models help distinguish correlation from causation in genetic association studies of the IL-8 pathway.
Knock-in
Knock-in of tagged CXCL8 or CXCR2 allows tracking of receptor trafficking, ligand secretion and localization during the IL-8 response. Knock-in of disease-associated variants provides isogenic models for functional studies.
Overexpression
Overexpression of CXCL8, CXCR1, CXCR2 or cholinergic receptors can amplify or suppress the response, enabling gain-of-function studies. Overexpression models are useful for testing whether increased IL-8 signaling is sufficient to drive inflammatory or tumor phenotypes.
How EDITGENE Supports cellular response to interleukin-8 Research
Researchers studying cellular response to interleukin-8-related genes often need to determine whether a candidate gene is causally involved in the pathway or merely correlated with it. CRISPR-based models provide the cleanest way to establish causality, and EDITGENE offers a full suite of services to build and validate those models.
Contact EDITGENE today to design your custom CRISPR model for cellular response to interleukin-8 research.
Frequently Asked Questions About cellular response to interleukin-8
What is GO:0098759 cellular response to interleukin-8?
GO:0098759 is a Gene Ontology biological process term describing any change in a cell's state or activity, such as movement, secretion, enzyme production or gene expression, that occurs in response to an interleukin-8 stimulus.
What genes are involved in the cellular response to interleukin-8?
Key genes include CXCL8 (the ligand), CXCR1 and CXCR2 (the receptors), MAPK1/MAPK3, PIK3CA, AKT1, HNRNPK and NFKB1, among others.
Which receptors bind interleukin-8?
IL-8 binds the G-protein-coupled receptors CXCR1 and CXCR2, which initiate downstream signaling.
How does IL-8 signaling affect cancer immunotherapy?
Myeloid IL-8/CXCR2 signaling can mediate immunotherapy resistance in hepatocellular carcinoma, and targeting it can restore responses. Radiotherapy can also orchestrate natural killer cell-dependent antitumor immunity through CXCL8.
Is the IL-8 response involved in bacterial infections?
Yes. Single-cell atlases of bacterial pneumonia reveal pan-immune programs consistent with IL-8-driven responses, and lipopolysaccharides modulate intestinal inflammation in a species-specific manner.
Can viruses exploit IL-8 signaling?
Yes. The CXCL8/MAPK/hnRNP-K axis enables susceptibility to EV-D68, rhinovirus and influenza virus in vitro.
How is the IL-8 response regulated?
It is regulated by receptor desensitization, cholinergic signaling that attenuates pro-inflammatory responses in colonic epithelial cells, and genetic variation in IL8 haplotypes.
What experimental models are used to study GO:0098759?
Common models include CRISPR knockout, knock-in, point-mutation and overexpression cell lines, combined with RNA-seq, phospho-Western blotting, ELISA and chemotaxis assays.
Is there a link between IL-8 and periodontitis?
Yes. IL8 haplotypes influence lymphocyte and macrophage responses to gram-negative periodontopathogens, linking the pathway to periodontal disease.
Can the IL-8 pathway be targeted therapeutically?
Efforts towards pharmacological intervention targeting CXCL8 and its receptors are actively pursued, and myeloid IL-8/CXCR2 blockade can overcome immunotherapy resistance in preclinical models.
Conclusion
GO:0098759, cellular response to interleukin-8, is a central biological process that converts an inflammatory chemokine signal into coordinated changes in cell movement, secretion and gene expression. Its involvement in bacterial pneumonia, intestinal inflammation, periodontitis, viral infection and cancer immunotherapy resistance makes it a high-priority pathway for both mechanistic and translational research. CRISPR-based knockout, knock-in, point-mutation and overexpression models, combined with transcriptomic and signaling assays, provide the tools needed to dissect this pathway and identify therapeutic targets. EDITGENE supports these efforts with end-to-end cell model engineering, library screening and bioinformatics services.
References
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- 4. Walle T et al.. 2022. Radiotherapy orchestrates natural killer cell dependent antitumor immune responses through CXCL8.. Sci Adv 8(12):eabh4050 PMID: 35319989
- 5. Kwong TT et al.. 2025. Overcoming immunotherapy resistance in hepatocellular carcinoma by targeting myeloid IL-8/CXCR2 signaling.. Mol Ther 33(4):1659-1673 PMID: 39916327
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- 7. Müller I et al.. 2021. Cholinergic Signaling Attenuates Pro-Inflammatory Interleukin-8 Response in Colonic Epithelial Cells.. Front Immunol 12:781147 PMID: 35069554
- 8. Pigossi SC et al.. 2019. Functionality of the Interleukin 8 haplotypes in lymphocytes and macrophages in response to gram-negative periodontopathogens.. Gene 689:152-160 PMID: 30562605
