GO:0070498 interleukin-1-mediated signaling pathway: Inflammatory Signaling, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0070498 describes the molecular signal cascade that begins when interleukin-1 (IL-1 alpha or IL-1 beta) binds its receptor on a target cell and ends with regulation of downstream cellular processes such as transcription.
• IL-1 signaling is a master driver of inflammation and is mechanistically linked to osteoarthritis, osteoclastogenesis, lung fibrosis, liver injury, melanoma cell death, and tumor imprinting.
• The pathway converges on NF-kB and MAPK activation, and its intensity can be modulated by receptor activator of NF-kB (RANK) signaling and by sphingomyelin/ceramide metabolism.
• IL-1-mediated signaling can produce inflammatory memory, which may be protective (trained immunity) or maladaptive (tumor imprinting), depending on context.
• CRISPR knockout, point-mutation, knock-in, and overexpression models are essential to dissect which nodes of GO:0070498 are causal in disease.
• EDITGENE provides end-to-end CRISPR cell model and library screening services to study interleukin-1-mediated signaling pathway genes at scale.
Description
Interleukin-1 (IL-1) is one of the most potent initiators of inflammation, and the interleukin-1-mediated signaling pathway (GO:0070498) is the defined biological process that converts IL-1 binding at the cell surface into changes in gene expression and cell behavior. This pathway is triggered by either IL-1 alpha or IL-1 beta and is central to innate immune responses, tissue remodeling, and pathological inflammation. Because dysregulated IL-1 signaling underlies diseases ranging from osteoarthritis to cancer, researchers need precise, reproducible models to map which components of GO:0070498 drive specific outcomes. The pathway is not a simple on/off switch. Studies in articular chondrocytes show that inflammatory signaling sensitizes mechanotransduction channels such as Piezo1, creating a pathogenic feed-forward loop in osteoarthritis. In lung fibroblasts, IL-1-mediated signaling is concordant in some Thy-1 subpopulations and discordant in others, illustrating cell-type-specific wiring. In bone, IL-1-mediated osteoclastogenesis requires receptor activator of nuclear factor kappa-B (RANK) signaling, demonstrating crosstalk between cytokine and differentiation pathways. These examples show why GO:0070498 must be studied with gene-level resolution. For biomedical researchers, GO:0070498 provides a controlled vocabulary anchor for annotating genes, interpreting transcriptomic and proteomic data, and designing CRISPR screens. The pathway intersects with sphingomyelin metabolism and cyclooxygenase gene regulation, with ethanol-induced liver sensitization, with Group B streptococcus-induced senescence in amnion epithelial cells, and with melanoma cell death induced by natural compounds. This article summarizes the authoritative definition, core mechanism, key genes, disease links, and experimental methods for studying interleukin-1-mediated signaling pathway.
interleukin-1-mediated signaling pathway At A Glance
| GO ID | GO:0070498 |
|---|---|
| GO term | interleukin-1-mediated signaling pathway |
| Ontology | biological_process |
| Synonym | IL-1 alpha-mediated signaling pathway; IL-1 beta-mediated signaling pathway; IL-1-mediated signaling pathway; interleukin-1 alpha-mediated signaling pathway; interleukin-1 beta-mediated signaling pathway; interleukin-1-mediated signalling pathway |
| Major function | Transduces IL-1 alpha or IL-1 beta binding at the cell surface into regulation of downstream cellular processes such as transcription |
| Definition source | QuickGO definition: the series of molecular signals initiated by interleukin-1 binding to its receptor on the surface of a target cell, and ending with the regulation of a downstream cellular process, e.g. transcription |
| Pathway class | Cytokine-mediated inflammatory signaling |
| Representative outcomes | NF-kB and MAPK-dependent gene expression, prostaglandin E2 production, osteoclastogenesis, senescence, and cell death |
| Disease relevance | Osteoarthritis, lung fibrosis, liver injury, tumor imprinting, melanoma, and pregnancy-related inflammation |
What Is GO:0070498?
According to the QuickGO definition, GO:0070498 is the series of molecular signals initiated by interleukin-1 binding to its receptor on the surface of a target cell, and ending with the regulation of a downstream cellular process, for example transcription. In other words, it covers everything from ligand-receptor engagement through intracellular relay to a functional cellular outcome. The term includes both IL-1 alpha-mediated and IL-1 beta-mediated signaling, and is synonymous with interleukin-1 alpha-mediated signaling pathway, interleukin-1 beta-mediated signaling pathway, IL-1-mediated signaling pathway, and interleukin-1-mediated signalling pathway.
Why Is interleukin-1-mediated signaling pathway Important in Cell Biology?
GO:0070498 is important because interleukin-1 is a primary alarm cytokine, and the pathway it defines sits at the intersection of infection, sterile inflammation, tissue remodeling, and cancer. Experimental evidence shows that IL-1-mediated signaling sensitizes mechanotransduction in chondrocytes and creates a feed-forward pathogenic loop in osteoarthritis, that it drives osteoclastogenesis through RANK-dependent mechanisms, and that it can imprint inflammatory memory with either protective or maladaptive tumor consequences. Because the pathway is druggable and its components are genetically tractable, it is a high-value target for functional genomics and therapeutic discovery.
• Defines the molecular route from IL-1 alpha or IL-1 beta binding to transcriptional regulation, enabling consistent annotation of inflammatory genes.
• Central to osteoarthritis pathogenesis via a Piezo1-dependent feed-forward mechanism in articular chondrocytes.
• Required for IL-1-mediated osteoclastogenesis and bone resorption through RANK signaling.
• Shows cell-type-specific concordance and discordance in lung fibroblasts, relevant to pulmonary fibrosis.
• Linked to liver inflammation sensitized by chronic ethanol consumption.
• Mediates prostaglandin E2 production and cyclooxygenase gene regulation via sphingomyelin metabolism.
• Contributes to Group B streptococcus-induced cellular senescence in human amnion epithelial cells.
• Can drive melanoma cell death through a partial IL-1-mediated pathway.
• Underlies inflammatory memory that may train immunity or imprint tumors.
• Provides a target set for CRISPR knockout, knock-in, and overexpression screens in inflammation research.
What Happens During interleukin-1-mediated signaling pathway?
Ligand binding and receptor engagement
In simple terms: IL-1 acts like a key that fits a lock on the cell surface, starting the alarm.
The pathway begins when IL-1 alpha or IL-1 beta binds to its receptor on the surface of a target cell, as specified in the QuickGO definition. This ligand-receptor engagement is the initiating event that commits the cell to a signaling response. In chondrocytes, this initial inflammatory signal can sensitize mechanotransduction channels, showing that receptor engagement is coupled to mechanical signaling.
Intracellular relay and NF-kB activation
In simple terms: Once the alarm is triggered, a chain of proteins carries the message to the nucleus.
Following receptor engagement, intracellular adaptors and kinases relay the signal toward transcription factors. IL-1-mediated signaling requires receptor activator of nuclear factor kappa-B (RANK) signaling for osteoclastogenesis, demonstrating that NF-kB activation is a key downstream node. This relay converts a transient extracellular cue into sustained changes in gene expression.
MAPK and inflammatory gene expression
In simple terms: The message reaches the DNA and switches inflammatory genes on.
IL-1-mediated signaling regulates downstream cellular processes such as transcription, including cyclooxygenase gene expression and prostaglandin E2 production. In lung fibroblasts, the pathway shows concordant and discordant responses across Thy-1 subpopulations, indicating that MAPK and NF-kB outputs are context-dependent. These transcriptional outputs define the functional endpoint of GO:0070498.
Metabolic crosstalk and sphingomyelin metabolism
In simple terms: The pathway also changes the cell's fat chemistry, which feeds back on inflammation.
IL-1-mediated PGE2 production is accompanied by sphingomyelin metabolism, and sphingosine and ceramide regulate cyclooxygenase gene expression. This metabolic crosstalk means GO:0070498 is not purely a protein kinase cascade; it intersects with lipid signaling. Such intersections can amplify or dampen the inflammatory output.
Cellular outcomes: senescence, death, and inflammatory memory
In simple terms: Depending on the cell, the same pathway can make cells stop dividing, die, or remember inflammation.
IL-1-mediated signaling can induce cellular senescence in human amnion epithelial cells after Group B streptococcus exposure, and can contribute to melanoma A375-S2 cell death induced by evodiamine. It also establishes inflammatory memory that may be protective training or maladaptive tumor imprinting. These divergent outcomes illustrate the pleiotropic nature of GO:0070498.
Key Genes Involved in GO:0070498 interleukin-1-mediated signaling pathway
The following genes and proteins are experimentally implicated in interleukin-1-mediated signaling pathway (GO:0070498) and its downstream outcomes.
| Gene | Major Role | Research Relevance |
|---|---|---|
| IL1A | IL-1 alpha ligand that initiates the pathway | Studied as an initiator of inflammatory signaling in chondrocytes and other target cells |
| IL1B | IL-1 beta ligand that initiates the pathway | Central to inflammatory memory and tumor imprinting studies |
| IL1R1 | Surface receptor for IL-1 | Required for ligand binding and pathway initiation per GO definition |
| MYD88 | Adaptor that relays IL-1 receptor signals | Core intracellular node of GO:0070498 |
| NFKB1 | Transcription factor activated downstream | Required for IL-1-mediated osteoclastogenesis |
| RANK | Receptor activator of NF-kB | Required for IL-1-mediated osteoclastogenesis |
| PIEZO1 | Mechanotransduction channel sensitized by inflammatory signaling | Feed-forward mechanism in osteoarthritis |
| THY1 | Fibroblast surface marker defining subpopulations | Concordant and discordant IL-1 responses in lung fibroblasts |
| PTGS2 | Cyclooxygenase gene regulated by IL-1 signaling | Linked to PGE2 production and sphingomyelin metabolism |
| SMPD1 | Sphingomyelin metabolism enzyme | Connects IL-1 signaling to ceramide and cyclooxygenase regulation |
| MAPK1 | Kinase in downstream signaling | Contributes to transcriptional regulation in GO:0070498 |
| MAPK3 | Kinase in downstream signaling | Contributes to transcriptional regulation in GO:0070498 |
| TP53 | Senescence and cell death regulator | Linked to IL-1-mediated senescence in amnion epithelial cells |
| CDKN1A | Cell cycle inhibitor in senescence | Relevant to IL-1-mediated senescence |
| CASP3 | Executioner caspase in apoptosis | Relevant to IL-1-mediated melanoma cell death |
| CXCL8 | Inflammatory chemokine induced by IL-1 | Downstream transcriptional output of GO:0070498 |
| IL6 | Inflammatory cytokine induced by IL-1 | Amplifies inflammatory memory and tumor imprinting |
| TNF | Inflammatory cytokine crosstalking with IL-1 | Context for inflammatory signaling networks |
How Is interleukin-1-mediated signaling pathway Regulated?
Interleukin-1-mediated signaling pathway is regulated at multiple levels. In articular chondrocytes, inflammatory signaling sensitizes Piezo1 mechanotransduction, creating a pathogenic feed-forward mechanism that amplifies the pathway in osteoarthritis. In lung fibroblasts, Thy-1 subpopulations show concordant and discordant IL-1-mediated signaling, indicating cell-intrinsic regulation of pathway strength. Chronic ethanol consumption enhances IL-1-mediated signal transduction in rat liver and cultured hepatocytes, showing that metabolic state can upregulate the pathway. Sphingomyelin metabolism and ceramide regulate cyclooxygenase gene expression downstream of IL-1, providing a lipid-based regulatory layer. Finally, inflammatory memory established by IL-1 signaling can be protective or maladaptive, depending on the tissue context.
interleukin-1-mediated signaling pathway and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| PIEZO1 | Osteoarthritis feed-forward inflammation | Knockout chondrocyte cell line with IL-1 stimulation |
| RANK | IL-1-mediated osteoclastogenesis | Knockout osteoclast precursor cells |
| THY1 | Lung fibroblast heterogeneity in fibrosis | Thy-1 positive and negative fibroblast lines |
| PTGS2 | PGE2 production and sphingomyelin metabolism | Overexpression and knockout hepatocyte or fibroblast models |
| TP53 | Group B streptococcus-induced senescence | Knockout amnion epithelial cells |
Osteoarthritis and cartilage degeneration
In osteoarthritis, inflammatory signaling sensitizes Piezo1 mechanotransduction in articular chondrocytes, forming a pathogenic feed-forward mechanism that links GO:0070498 to cartilage degradation. This suggests that IL-1-mediated signaling is not merely a marker of inflammation but an active driver of disease progression.
Bone loss and osteoclastogenesis
IL-1-mediated osteoclastogenesis requires receptor activator of nuclear factor kappa-B (RANK) signaling, directly connecting GO:0070498 to bone resorption and inflammatory bone disease. This molecular basis provides a rationale for targeting both IL-1 and RANK nodes in bone pathology.
Pulmonary fibrosis and fibroblast heterogeneity
Lung fibroblast Thy-1 subpopulations show concordant and discordant IL-1-mediated signaling, which may explain heterogeneous fibrotic responses in the lung. This positions GO:0070498 as a modifier of pulmonary fibrosis progression.
Inflammatory memory and tumor imprinting
IL-1-mediated inflammatory memory can be protective training or maladaptive tumor imprinting, linking GO:0070498 to long-term cancer risk and immune reprogramming. This dual role makes the pathway a context-dependent therapeutic target.
From interleukin-1-mediated signaling pathway-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is a candidate gene required for IL-1-mediated transcription? | CRISPR knockout cell line with IL-1 stimulation and RNA-seq |
| Does a specific point mutation alter pathway output? | Point-mutation knock-in cell line |
| Does a tag affect pathway protein localization? | Tagged knock-in cell line |
| Does overexpression amplify inflammatory memory? | Overexpression cell model |
| Which genes sensitize mechanotransduction? | Knockout chondrocytes plus mechanical loading |
| Does loss of a gene block osteoclastogenesis? | Knockout osteoclast precursors with RANK ligand and IL-1 |
How to Study the interleukin-1-mediated signaling pathway Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | Transcriptional changes downstream of IL-1 | Identify GO:0070498 target genes |
| CRISPR knockout screen | Genes required for IL-1-mediated phenotypes | Discover pathway nodes |
| Western blot | NF-kB and MAPK activation | Validate signaling blockade |
| ELISA | PGE2 and cytokine production | Quantify inflammatory output |
| Senescence assay | Cellular senescence after IL-1 exposure | Model amnion epithelial senescence |
| Apoptosis assay | Cell death after IL-1-mediated signaling | Model melanoma cell death |
| Mechanotransduction assay | Piezo1-dependent calcium flux | Osteoarthritis feed-forward loop |
| Co-culture assay | Cell-cell inflammatory crosstalk | Fibroblast heterogeneity studies |
Transcriptomic profiling of IL-1 responses
RNA-seq after IL-1 stimulation can identify genes whose expression depends on GO:0070498. In lung fibroblasts, concordant and discordant responses across Thy-1 subpopulations were resolved by comparing transcriptional outputs. This method is ideal for defining downstream cellular processes regulated by the pathway.
Functional CRISPR screens
Pooled CRISPR knockout screens can test which genes are required for IL-1-mediated signaling outcomes such as PGE2 production or inflammatory gene expression. Screens in chondrocytes or osteoclast precursors can nominate nodes like PIEZO1 or RANK for validation.
Protein and phospho-signaling assays
Western blotting and phospho-kinase arrays measure activation of NF-kB and MAPK nodes downstream of IL-1 receptor engagement. These assays confirm whether a genetic perturbation blocks the pathway at the signaling level.
Phenotypic assays for senescence and death
Senescence-associated beta-galactosidase staining and apoptosis assays can quantify IL-1-mediated cellular outcomes in amnion epithelial cells and melanoma cells. These readouts connect GO:0070498 to terminal cell fates.
How CRISPR Can Be Used to Study GO:0070498 interleukin-1-mediated signaling pathway
Knockout
CRISPR knockout of IL1R1, MYD88, or RANK can abolish IL-1-mediated signaling and block downstream osteoclastogenesis or inflammatory gene expression. Knockout chondrocyte models can test whether PIEZO1 is required for the feed-forward loop in osteoarthritis.
Point Mutation
Point-mutation knock-in can model patient variants or phospho-site mutations in pathway components to test their effect on NF-kB activation and transcriptional output. This approach is useful when complete knockout is lethal or confounded by compensatory mechanisms.
Knock-in
Tagged knock-in of pathway genes enables live-cell imaging and proteomic pull-down of IL-1 signaling complexes. Knock-in reporters can also quantify pathway activity in real time.
Overexpression
Overexpression of IL1B, IL1A, or downstream effectors can amplify inflammatory memory and tumor imprinting phenotypes for study. Overexpression models are also useful for testing whether a gene is sufficient to drive senescence or cell death.
How EDITGENE Supports interleukin-1-mediated signaling pathway Research
Researchers studying interleukin-1-mediated signaling pathway-related genes often need to determine whether a candidate gene is causally involved in inflammatory signaling or merely correlated with it. EDITGENE provides CRISPR cell model and screening services that let you move from candidate lists to validated mechanism in a controlled, reproducible system.
Contact EDITGENE today to design your custom CRISPR model for interleukin-1-mediated signaling pathway research.
Frequently Asked Questions About interleukin-1-mediated signaling pathway
What is GO:0070498?
GO:0070498 is the Gene Ontology term for interleukin-1-mediated signaling pathway, defined as the series of molecular signals initiated by interleukin-1 binding to its receptor on the surface of a target cell and ending with regulation of a downstream cellular process such as transcription.
What genes are involved in interleukin-1-mediated signaling pathway?
Key genes include IL1A, IL1B, IL1R1, MYD88, NFKB1, RANK, PIEZO1, THY1, PTGS2, and MAPK1/3, based on experimental studies of the pathway.
What does interleukin-1-mediated signaling pathway do?
It converts IL-1 alpha or IL-1 beta binding at the cell surface into changes in gene expression and cell behavior, including inflammation, osteoclastogenesis, senescence, and cell death.
How is interleukin-1-mediated signaling pathway regulated?
It is regulated by feed-forward loops such as Piezo1 sensitization in chondrocytes, by cell-type-specific factors like Thy-1 in fibroblasts, by ethanol exposure in liver, and by sphingomyelin metabolism.
Which diseases are linked to GO:0070498?
Osteoarthritis, inflammatory bone loss, pulmonary fibrosis, liver injury, Group B streptococcus-induced senescence, melanoma, and tumor imprinting have been linked to this pathway.
How do I study interleukin-1-mediated signaling pathway with CRISPR?
CRISPR knockout, point-mutation, knock-in, and overexpression models can test whether specific genes are required or sufficient for IL-1-mediated outcomes such as NF-kB activation and PGE2 production.
What is the role of RANK in IL-1-mediated signaling?
RANK signaling is required for IL-1-mediated osteoclastogenesis, making it a critical node downstream of the IL-1 receptor in bone cells.
Does IL-1 signaling affect mechanotransduction?
Yes, inflammatory signaling sensitizes Piezo1 mechanotransduction in articular chondrocytes, creating a pathogenic feed-forward mechanism in osteoarthritis.
Can IL-1 signaling cause cell death?
IL-1-mediated signaling can contribute to melanoma A375-S2 cell death induced by evodiamine, showing a partial role in apoptotic outcomes.
What is inflammatory memory in IL-1 signaling?
Inflammatory memory is a long-term reprogramming effect of IL-1-mediated signaling that can be protective training or maladaptive tumor imprinting.
Conclusion
GO:0070498 interleukin-1-mediated signaling pathway is a central biological process that translates IL-1 alpha or IL-1 beta binding into transcriptional and cellular outcomes. Its roles in osteoarthritis, osteoclastogenesis, fibrosis, liver injury, senescence, and tumor imprinting make it a high-priority target for functional genomics. By combining CRISPR knockout, point-mutation, knock-in, overexpression, and library screening with bioinformatics, researchers can dissect which nodes of GO:0070498 are causal in disease and which are context-dependent. EDITGENE provides the cell models and screening services needed to accelerate this work.
References
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- 6. Park HR et al.. 2024. Group B streptococcus induces cellular senescence in human amnion epithelial cells through a partial interleukin-1-mediated mechanism.. Biol Reprod 110(2):329-338 PMID: 37903065
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