GO:0038065 collagen-activated signaling pathway: Mechanism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0038065 (collagen-activated signaling pathway) describes the molecular cascade triggered when collagen binds to cell surface receptors, leading to downstream cellular responses such as transcription.
• Key receptors include integrins and discoidin domain receptors (DDR1, DDR2), which initiate signaling upon collagen engagement.
• Downstream effectors such as JAK2, p38-MAPK, and NF-κB mediate collagen-induced platelet activation, keratinocyte migration, and feedback inhibitory signaling.
• Dysregulation of collagen-activated signaling is implicated in cancer progression, fibrosis, and chemotherapy-induced senescence.
• CRISPR-based models (knockout, point mutation, knock-in, overexpression) enable causal interrogation of collagen signaling components in relevant cell types.
• EDITGENE provides comprehensive CRISPR services to accelerate research on collagen-activated signaling pathway genes.
Description
The collagen-activated signaling pathway (GO:0038065) is a biological process defined as the series of molecular signals initiated by collagen binding to a cell surface receptor, culminating in the regulation of downstream cellular processes such as transcription. Collagen, the most abundant protein in the extracellular matrix, serves not only as a structural scaffold but also as a signaling ligand that modulates cell behavior in development, tissue homeostasis, and disease. This pathway is particularly relevant in platelets, where collagen triggers activation and aggregation, and in various cell types where collagen-integrin or collagen-DDR interactions influence migration, proliferation, and differentiation. Understanding the molecular players and regulatory mechanisms of collagen-activated signaling is essential for uncovering therapeutic targets in cancer, fibrosis, and cardiovascular disorders.
collagen-activated signaling pathway At A Glance
| GO ID | GO:0038065 |
|---|---|
| GO term | collagen-activated signaling pathway |
| Ontology | biological_process |
| Synonym | collagen-activated signalling pathway |
| Definition | The series of molecular signals initiated by collagen binding to a cell surface receptor, and ending with the regulation of a downstream cellular process, e.g. transcription. |
| Major function | Transduces extracellular collagen cues into intracellular responses, including transcription, migration, and activation. |
| Key receptors | Integrins, discoidin domain receptors (DDR1, DDR2) |
| Downstream effectors | JAK2, p38-MAPK, NF-κB, TGFβ signaling |
| Disease relevance | Cancer, fibrosis, platelet disorders, chemotherapy-induced senescence |
What Is GO:0038065?
According to the Gene Ontology, GO:0038065 (collagen-activated signaling pathway) refers to the series of molecular signals initiated by collagen binding to a cell surface receptor, and ending with the regulation of a downstream cellular process, e.g. transcription. This process encompasses receptor activation, intracellular signal transduction, and eventual cellular responses such as changes in gene expression, cell migration, or platelet activation.
Why Is collagen-activated signaling pathway Important in Cell Biology?
Collagen-activated signaling is fundamental to how cells sense and respond to their mechanical and biochemical environment. It plays critical roles in platelet activation and hemostasis, in wound healing and keratinocyte migration, and in pathological processes such as tumor progression, fibrosis, and chemotherapy resistance. Targeting this pathway holds therapeutic potential for a range of diseases, making it a vibrant area of biomedical research.
• Mediates platelet activation and aggregation in response to collagen, essential for hemostasis and thrombosis.
• Regulates keratinocyte migration on dermal collagen, critical for wound re-epithelialization.
• Drives cancer cell behaviors including aggressiveness and senescence through DDR1 and integrin signaling.
• Contributes to liver fibrosis via insulin receptor and TGFβ crosstalk in hepatic stellate cells.
• Involved in feedback inhibitory signaling that modulates platelet responses.
• Provides mechanistic insights into extracellular matrix-cell communication.
• Offers targets for anti-cancer and anti-fibrotic therapies.
• Enables study of collagen-receptor specific effects using CRISPR models.
What Happens During collagen-activated signaling pathway?
Collagen Binding and Receptor Activation
In simple terms: Collagen outside the cell attaches to receptors on the cell surface, switching them on.
The pathway begins when collagen binds to cell surface receptors such as integrins or discoidin domain receptors (DDRs). This binding induces receptor clustering, conformational changes, and activation of intrinsic kinase activity (for DDRs) or recruitment of signaling adaptors (for integrins). In platelets, collagen binding to glycoprotein VI and integrin α2β1 triggers intracellular signaling.
Intracellular Signal Transduction
In simple terms: Activated receptors pass the signal to molecules inside the cell, like a relay race.
Upon activation, receptors phosphorylate downstream targets and recruit signaling complexes. Key pathways include JAK2-dependent signaling in platelets, p38-MAPK/SAPK activation in keratinocytes, and NF-κB modulation in platelets. Integrin signaling can also lead to premature senescence in bladder cancer cells.
Regulation of Downstream Cellular Processes
In simple terms: The signal reaches the nucleus or other cellular machinery, changing what the cell does.
The cascade culminates in regulation of transcription factors and other effectors. For example, collagen-activated signaling can induce TGFβ-mediated hepatic stellate cell activation, promote melanoma aggressiveness via DDR1, and modulate liver fibrosis through transcriptomic changes. These downstream effects influence cell migration, proliferation, differentiation, and survival.
Feedback and Crosstalk
In simple terms: The cell can dial down or adjust the signal through feedback loops.
Collagen-activated signaling is subject to feedback inhibition. In platelets, thrombin and collagen induce a feedback inhibitory pathway involving dissociation of protein kinase A catalytic subunit from NF-κB-IκB complex. Crosstalk with insulin receptor signaling governs TGFβ-induced hepatic stellate cell activation, linking metabolic state to fibrosis.
Key Genes Involved in GO:0038065 collagen-activated signaling pathway
The following genes and proteins are central to collagen-activated signaling, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| DDR1 | Collagen receptor tyrosine kinase | Melanoma aggressiveness, cancer progression |
| DDR2 | Collagen receptor tyrosine kinase | Tumor biology, fibrosis |
| ITGB1 (Integrin β1) | Collagen-binding integrin subunit | Chemotherapy-induced senescence |
| ITGA2 (Integrin α2) | Collagen-binding integrin subunit | Platelet activation |
| JAK2 | Janus kinase 2 | Platelet activation signaling |
| MAPK14 (p38α) | Stress-activated protein kinase | Keratinocyte migration on collagen |
| NFKB1 | NF-κB transcription factor | Feedback inhibitory signaling in platelets |
| PRKACA | Protein kinase A catalytic subunit | Feedback inhibition in platelets |
| TGFB1 | Transforming growth factor beta | Hepatic stellate cell activation, fibrosis |
| INSR | Insulin receptor | Crosstalk with TGFβ in liver fibrosis |
| KIND3 (Kindlin-3) | Integrin adaptor protein | Melanoma aggressiveness via DDR1 |
| COL1A1 | Type I collagen | Ligand for collagen receptors |
| COL4A1 | Type IV collagen | Basement membrane component |
| GP6 | Glycoprotein VI | Platelet collagen receptor |
| ITGB3 | Integrin β3 | Platelet aggregation |
| SRC | Proto-oncogene tyrosine kinase | Downstream of integrins |
| PTK2 (FAK) | Focal adhesion kinase | Integrin signaling |
How Is collagen-activated signaling pathway Regulated?
Collagen-activated signaling is regulated at multiple levels. Receptor availability and affinity are modulated by extracellular matrix composition and proteolytic processing. Intracellularly, feedback loops such as the protein kinase A-NF-κB axis in platelets dampen signaling after activation. Crosstalk with metabolic pathways, such as insulin receptor signaling, can amplify or attenuate responses in hepatic stellate cells. Additionally, kindlin-3 inactivation enhances DDR1-mediated signaling in melanoma, illustrating negative regulation.
collagen-activated signaling pathway and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| DDR1 | Melanoma aggressiveness | DDR1 knockout melanoma cell lines |
| ITGB1 | Chemotherapy-induced senescence | Integrin β1 knockdown bladder cancer cells |
| JAK2 | Platelet activation disorders | JAK2 knockout platelets or megakaryocytes |
| TGFB1 | Liver fibrosis | TGFβ1 overexpression in hepatic stellate cells |
| KIND3 | Melanoma progression | Kindlin-3 knockout melanoma cells |
Cancer Progression and Metastasis
Collagen-activated signaling promotes tumor aggressiveness. In melanoma, inactivation of kindlin-3 increases DDR1-mediated signaling, enhancing invasiveness. In bladder cancer, integrin signaling blockade reduces chemotherapy-induced premature senescence in collagen-cultured cells. DDRs are implicated in various cancers, making them therapeutic targets.
Liver Fibrosis
Collagen-activated signaling in hepatic stellate cells drives fibrosis. Insulin resistance instigates liver fibrosis by governing TGFβ-induced hepatic stellate cell activation. The Yiqi Huoxue decoction alleviates liver fibrosis through mechanisms involving collagen-related pathways.
Platelet Disorders and Thrombosis
Collagen-induced platelet activation is critical for hemostasis but can contribute to thrombosis. JAK2-dependent signaling and feedback inhibitory pathways modulate platelet responses to collagen. Targeting these pathways may yield antithrombotic therapies.
Chemotherapy-Induced Senescence
Collagen-activated integrin signaling contributes to chemotherapy-induced premature senescence in bladder cancer cells, suggesting that blocking this pathway could reduce senescence-associated side effects.
From collagen-activated signaling pathway-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does DDR1 mediate collagen-induced melanoma invasion? | DDR1 knockout melanoma cell line |
| What is the role of JAK2 in platelet activation by collagen? | JAK2 knockout megakaryocytes or platelets |
| How does integrin β1 contribute to chemotherapy-induced senescence? | Integrin β1 knockdown bladder cancer cells |
| Can kindlin-3 mutation affect DDR1 signaling? | Kindlin-3 point mutant melanoma cells |
| Does TGFβ1 overexpression drive hepatic stellate cell activation? | TGFβ1 overexpression in hepatic stellate cells |
| What is the effect of collagen on keratinocyte migration? | p38-MAPK knockout keratinocytes |
How to Study the collagen-activated signaling pathway Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | Global gene expression changes | Identify transcriptional targets of collagen signaling |
| Phosphoproteomics | Phosphorylation events | Map kinase cascades |
| Western blot | Protein expression and phosphorylation | Validate signaling activation |
| Immunofluorescence | Protein localization and activation | Visualize receptor clustering |
| Migration assay | Cell movement on collagen | Assess keratinocyte migration |
| Platelet aggregometry | Platelet activation | Study collagen-induced aggregation |
| CRISPR screening | Gene function in pathway | Identify novel regulators |
Transcriptomic Profiling
RNA-seq and microarray analyses can identify gene expression changes downstream of collagen-activated signaling. For example, transcriptomics combined with network pharmacology revealed mechanisms of Yiqi Huoxue decoction against liver fibrosis.
Phosphoproteomics
Mass spectrometry-based phosphoproteomics can map phosphorylation events triggered by collagen binding, uncovering kinase cascades such as JAK2 and p38-MAPK.
Imaging and Migration Assays
Live-cell imaging and scratch wound assays assess cell migration on collagen matrices, as shown for keratinocytes.
Platelet Aggregation Assays
Light transmission aggregometry measures platelet activation in response to collagen, useful for studying JAK2 and feedback inhibition.
How CRISPR Can Be Used to Study GO:0038065 collagen-activated signaling pathway
Knockout
CRISPR knockout of collagen receptors (e.g., DDR1, ITGB1) or downstream kinases (e.g., JAK2) can abolish collagen-activated signaling, revealing essential components. For instance, DDR1 knockout reduces melanoma aggressiveness.
Point Mutation
Introducing point mutations in kinase domains (e.g., DDR1 kinase-dead) or phosphorylation sites (e.g., JAK2) allows precise dissection of signaling mechanisms without complete loss of protein.
Knock-in
Knock-in of tagged receptors (e.g., GFP-DDR1) enables live-cell imaging and proteomic analysis of collagen-activated signaling complexes.
Overexpression
Overexpression of collagen receptors or downstream effectors (e.g., TGFβ1) can amplify signaling and model disease states such as fibrosis.
How EDITGENE Supports collagen-activated signaling pathway Research
Researchers studying collagen-activated signaling pathway-related genes often need to determine whether a candidate gene is causally involved in pathway activation, downstream transcription, or disease phenotypes. EDITGENE provides a comprehensive suite of CRISPR services to enable such investigations with precision and reproducibility.
Contact EDITGENE today to design your custom CRISPR model for collagen-activated signaling pathway research.
Frequently Asked Questions About collagen-activated signaling pathway
What is the collagen-activated signaling pathway?
It is the series of molecular signals initiated by collagen binding to a cell surface receptor, leading to regulation of downstream cellular processes such as transcription (GO:0038065).
What genes are involved in collagen-activated signaling?
Key genes include DDR1, DDR2, ITGB1, ITGA2, JAK2, MAPK14, NFKB1, PRKACA, TGFB1, and INSR, among others.
How does collagen activate platelets?
Collagen binds to glycoprotein VI and integrin α2β1 on platelets, triggering JAK2-dependent signaling and feedback inhibitory pathways.
What is the role of DDR1 in cancer?
DDR1 is a collagen receptor tyrosine kinase that promotes melanoma aggressiveness and tumor progression.
Can CRISPR be used to study collagen signaling?
Yes, CRISPR knockout, point mutation, knock-in, and overexpression models enable precise dissection of collagen-activated signaling components.
What diseases are associated with collagen-activated signaling?
Cancer, liver fibrosis, platelet disorders, and chemotherapy-induced senescence are linked to this pathway.
How is collagen-activated signaling regulated?
It is regulated by feedback loops (e.g., PKA-NF-κB), crosstalk with insulin signaling, and modulators like kindlin-3.
What methods are used to study collagen-activated signaling?
RNA-seq, phosphoproteomics, Western blot, imaging, migration assays, and platelet aggregometry are commonly used.
What is the GO ID for collagen-activated signaling pathway?
The GO ID is GO:0038065.
Why is collagen-activated signaling important for drug discovery?
It offers therapeutic targets for cancer, fibrosis, and thrombosis, and CRISPR models can accelerate target validation.
Conclusion
The collagen-activated signaling pathway (GO:0038065) is a critical biological process that translates extracellular collagen cues into diverse cellular responses. Its dysregulation contributes to cancer, fibrosis, and platelet disorders, making it a prime target for therapeutic intervention. Leveraging CRISPR-based models and multi-omics approaches will continue to unravel its complexities and facilitate drug discovery. EDITGENE stands ready to support these efforts with comprehensive gene editing and screening services.
References
- 1. Gambaryan S et al.. 2010. Thrombin and collagen induce a feedback inhibitory signaling pathway in platelets involving dissociation of the catalytic subunit of protein kinase A from an NFkappaB-IkappaB complex.. J Biol Chem 285(24):18352-63 PMID: 20356841
- 2. Zhang H et al.. 2025. Discoidin Domain Receptors in Tumor Biology and Immunology: Progression and Challenge.. Biomolecules 15(6) PMID: 40563472
- 3. Lu WJ et al.. 2014. Role of a Janus kinase 2-dependent signaling pathway in platelet activation.. Thromb Res 133(6):1088-96 PMID: 24731555
- 4. Deng L et al.. 2022. Blockade of integrin signaling reduces chemotherapy-induced premature senescence in collagen cultured bladder cancer cells.. Precis Clin Med 5(2):pbac007 PMID: 35694719
- 5. Li W et al.. 2001. The p38-MAPK/SAPK pathway is required for human keratinocyte migration on dermal collagen.. J Invest Dermatol 117(6):1601-11 PMID: 11886529
- 6. Lee WH et al.. 2025. Insulin receptor responsiveness governs TGFβ-induced hepatic stellate cell activation: Insulin resistance instigates liver fibrosis.. FASEB J 39(5):e70427 PMID: 40022609
- 7. Reger De Moura C et al.. 2024. Inactivation of kindlin-3 increases human melanoma aggressiveness through the collagen-activated tyrosine kinase receptor DDR1.. Oncogene 43(21):1620-1630 PMID: 38570692
- 8. Mao YY et al.. 2025. Combining transcriptomics with network pharmacology to explore the mechanism of Yiqi Huoxue decoction against liver fibrosis.. PLoS One 20(11):e0337061 PMID: 41296792
