GO:0033627 cell adhesion mediated by integrin: Mechanism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0033627 describes the attachment of a cell to another cell or to the extracellular matrix through integrins, which are heterodimeric alpha/beta adhesion receptors.
• Integrin-mediated adhesion is not passive: it requires conformational activation, extracellular disulfide exchange, and intracellular signaling, including calcium and phosphatidylinositol 4,5-bisphosphate-dependent events.
• Talin-1 is a central activator that links integrins to the actin cytoskeleton, and its levels are regulated by microRNAs such as miRNA-200c-3p.
• Integrin adhesion is dynamically connected to autophagy, cell migration, and invasion, making it a key process in cancer progression and tissue remodeling.
• Disease-associated mutations in matrix proteins such as fibrillin-1 can differentially alter integrin-mediated adhesion, linking this GO term to connective tissue disorders.
• Studying GO:0033627 experimentally requires adhesion assays, live imaging, and genetic models; CRISPR knockout, point mutation, knock-in, and overexpression cell lines are powerful tools for causal testing.
Description
Cell adhesion mediated by integrin (GO:0033627) is the biological process by which a cell attaches either to another cell or to an underlying substrate such as the extracellular matrix via integrins, which are heterodimeric adhesion receptors formed by non-covalent association of particular alpha and beta subunits. This process is fundamental to tissue architecture, cell migration, survival, and differentiation, and it is dynamically regulated rather than constitutive. Integrins sense both extracellular ligands and intracellular signals, allowing cells to respond to mechanical and biochemical cues. Because integrin-mediated adhesion controls cell behavior in development and disease, it is a major focus in cancer biology, immunology, and regenerative medicine. Experimental analysis of this process requires careful adhesion assays and an understanding of the molecular players that activate and regulate integrins. Key regulatory mechanisms include extracellular disulfide exchange catalyzed by protein disulfide isomerase, calcium signaling, and phosphoinositide metabolism. In addition, microRNAs and autophagy-related pathways intersect with integrin adhesion, showing that this process is integrated into broader cellular networks. This article summarizes the definition, mechanism, key genes, disease links, and research methods for GO:0033627, with all statements supported by published literature.
cell adhesion mediated by integrin At A Glance
| GO ID | GO:0033627 |
|---|---|
| GO term | cell adhesion mediated by integrin |
| Ontology | biological_process |
| Synonym | cell adhesion mediated by integrin complex |
| Definition | The attachment of a cell, either to another cell or to an underlying substrate such as the extracellular matrix, via an integrin, a heterodimeric adhesion receptor formed by the non-covalent association of particular alpha and beta subunits. |
| Major function | Integrin-dependent attachment of cells to extracellular matrix or other cells, enabling adhesion, migration, signaling, and tissue organization. |
| Key molecular players | Integrin alpha and beta subunits, talin-1, protein disulfide isomerase, phospholipase C delta1, calcium signaling components. |
| Regulatory inputs | Extracellular disulfide exchange, intracellular calcium, phosphatidylinositol 4,5-bisphosphate levels, microRNAs such as miRNA-200c-3p. |
| Disease relevance | Cancer invasion and metastasis, connective tissue disorders, and other pathologies involving altered cell-matrix adhesion. |
What Is GO:0033627?
GO:0033627, cell adhesion mediated by integrin, is defined as the attachment of a cell, either to another cell or to an underlying substrate such as the extracellular matrix, via an integrin, a heterodimeric adhesion receptor formed by the non-covalent association of particular alpha and beta subunits. In other words, it is the specific form of cell adhesion that depends on integrin receptors, as opposed to adhesion mediated by other classes of adhesion molecules. This process includes the binding of integrins to extracellular ligands, the clustering of integrins at adhesion sites, and the connection to the cytoskeleton and signaling pathways that stabilize or remodel the adhesion.
Why Is cell adhesion mediated by integrin Important in Cell Biology?
Integrin-mediated cell adhesion is essential for normal development and tissue homeostasis, and its dysregulation contributes to major human diseases including cancer, fibrosis, and connective tissue disorders. Because integrins physically link the extracellular environment to the cytoskeleton and to intracellular signaling cascades, this process controls cell survival, proliferation, migration, and differentiation. Understanding GO:0033627 therefore provides mechanistic insight into how cells sense and respond to their surroundings, and it offers therapeutic targets for conditions where adhesion is abnormal.
• Controls cell attachment to extracellular matrix, which is required for tissue integrity and wound healing.
• Regulates cell migration and invasion, key steps in cancer metastasis.
• Integrates mechanical and biochemical signals through calcium and phosphoinositide signaling.
• Is modulated by extracellular disulfide exchange, revealing redox control of adhesion.
• Is post-transcriptionally regulated by microRNAs such as miRNA-200c-3p targeting talin-1.
• Interconnects with autophagy, influencing cell survival under stress.
• Disease-associated mutations in matrix proteins like fibrillin-1 can alter integrin-mediated adhesion.
• Provides a target for experimental manipulation using CRISPR and adhesion assays.
• Relevant to immunology, developmental biology, and regenerative medicine.
• Serves as a paradigm for studying heterodimeric receptor function and signaling.
What Happens During cell adhesion mediated by integrin?
Integrin activation and ligand binding
In simple terms: Integrins must be switched on before they can stick to their targets.
Integrins are heterodimeric receptors that undergo conformational changes to adopt a high-affinity state for extracellular ligands. This activation can be triggered by intracellular signals (inside-out signaling) or by extracellular cues, and it involves separation of the alpha and beta subunit cytoplasmic tails and rearrangement of the ligand-binding domain. Protein disulfide isomerase can regulate integrin function through extracellular disulfide exchange, which is required for efficient adhesion. Calcium signaling also modulates integrin activation and adhesion strength.
Clustering and adhesion plaque formation
In simple terms: Once activated, integrins gather into groups and build an adhesion plaque inside the cell.
After ligand binding, integrins cluster at the plasma membrane and recruit intracellular adaptor proteins such as talin-1, which links integrins to the actin cytoskeleton. This clustering leads to the formation of focal adhesions and related adhesion plaques that stabilize the attachment. The assembly of these structures depends on the availability of phosphatidylinositol 4,5-bisphosphate, which is influenced by phospholipase C delta1. Talin-1 levels are regulated by miRNA-200c-3p, providing a layer of post-transcriptional control.
Cytoskeletal coupling and force transmission
In simple terms: The adhesion site connects to the cell's skeleton, allowing the cell to pull and sense its environment.
Integrin-mediated adhesions transmit mechanical forces between the extracellular matrix and the actin cytoskeleton. Talin-1 and other adaptors connect integrin beta tails to actin filaments, enabling cells to generate traction and to migrate. This coupling is dynamic and is remodeled during cell movement, with integrins cycling between active and inactive states. Calcium signaling contributes to the regulation of these events by affecting integrin affinity and cytoskeletal dynamics.
Signaling and crosstalk with autophagy
In simple terms: Adhesion also sends signals inside the cell and can talk to recycling pathways.
Integrin engagement activates intracellular signaling pathways, including calcium-dependent signals, that regulate cell survival, proliferation, and migration. There is crosstalk between integrin-mediated adhesion and autophagy, with evidence that autophagy can influence adhesion dynamics and vice versa. Phospholipase C delta1 affects integrin-mediated adhesion and migration by altering phosphatidylinositol 4,5-bisphosphate levels, linking lipid signaling to adhesion. These signaling networks allow cells to adapt their adhesion in response to changing conditions.
Adhesion turnover and migration
In simple terms: Adhesions must be broken down at the back of the cell for it to move forward.
Cell migration requires the coordinated assembly of new adhesions at the leading edge and disassembly at the rear. Integrin-mediated adhesion is therefore highly dynamic, with endocytosis and recycling of integrins contributing to turnover. Protein disulfide isomerase-dependent disulfide exchange can also influence adhesion stability. Dysregulation of adhesion turnover leads to excessive or reduced migration, which is relevant to cancer invasion.
Key Genes Involved in GO:0033627 cell adhesion mediated by integrin
The following genes and proteins are central to integrin-mediated cell adhesion and are frequently studied in this context.
| Gene | Major Role | Research Relevance |
|---|---|---|
| ITGB1 | Beta-1 integrin subunit; forms heterodimers with various alpha subunits to bind extracellular matrix ligands | Most widely expressed beta subunit; key for adhesion assays and knockout studies |
| ITGB3 | Beta-3 integrin subunit; partners with alpha-IIb or alpha-V in platelets and other cells | Important in hemostasis and cancer; target for point mutations affecting ligand binding |
| ITGAV | Alpha-V integrin subunit; binds vitronectin, fibronectin, and other ligands | Involved in angiogenesis and tumor progression; used in knock-in models |
| ITGA5 | Alpha-5 integrin subunit; specifically binds fibronectin | Classic model for studying fibronectin-integrin adhesion |
| TLN1 | Talin-1; activates integrins and links them to actin | Regulated by miRNA-200c-3p; knockout reduces adhesion |
| P4HB | Protein disulfide isomerase; catalyzes disulfide exchange | Required for integrin-mediated adhesion; target for inhibition studies |
| PLCD1 | Phospholipase C delta1; modulates phosphatidylinositol 4,5-bisphosphate levels | Affects integrin-mediated adhesion and migration |
| FBN1 | Fibrillin-1; extracellular matrix protein that interacts with integrins | Disease-associated mutations alter integrin-mediated adhesion |
| VCL | Vinculin; cytoskeletal adaptor at focal adhesions | Marker of adhesion plaques; used in imaging studies |
| PTK2 | Focal adhesion kinase (FAK); signaling kinase at integrin adhesions | Key downstream effector; knockout affects migration |
| ACTB | Beta-actin; major cytoskeletal component | Required for force transmission at adhesions |
| RAP1A | Small GTPase that promotes integrin activation | Regulates inside-out signaling; used in overexpression studies |
| RAP1B | Small GTPase that promotes integrin activation | Isoform-specific roles in adhesion |
| FERMT2 | Kindlin-2; co-activator of integrins | Knockout impairs integrin activation and adhesion |
| FERMT1 | Kindlin-1; co-activator of integrins in epithelial cells | Mutations cause Kindler syndrome; adhesion defects |
| CALM1 | Calmodulin; calcium sensor | Mediates calcium-dependent regulation of adhesion |
| ATG5 | Autophagy-related protein; involved in autophagosome formation | Links autophagy to integrin adhesion |
| BECN1 | Beclin-1; autophagy regulator | Crosstalk with adhesion pathways |
How Is cell adhesion mediated by integrin Regulated?
Integrin-mediated adhesion is regulated at multiple levels. Extracellular disulfide exchange catalyzed by protein disulfide isomerase is required for efficient adhesion, indicating redox-dependent control. Intracellular calcium signals modulate integrin affinity and adhesion strength. Phospholipase C delta1 influences adhesion by altering available phosphatidylinositol 4,5-bisphosphate levels. Post-transcriptional regulation by miRNA-200c-3p targets talin-1, reducing integrin-mediated adhesion. Autophagy-related pathways also intersect with adhesion, suggesting bidirectional regulation. These layers allow cells to fine-tune adhesion in response to environmental and intracellular cues.
cell adhesion mediated by integrin and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| ITGB1 | Cancer metastasis, fibrosis | Knockout cell lines and adhesion assays |
| FBN1 | Marfan syndrome, connective tissue disorders | Point mutation knock-in in cell models |
| TLN1 | Cancer progression, adhesion defects | miRNA-200c-3p overexpression or TLN1 knockout |
| PLCD1 | Cancer, adhesion and migration defects | Knockout or overexpression of PLCD1 |
| P4HB | Thrombosis, cancer | Inhibitor treatment and knockdown |
Cancer invasion and metastasis
Integrin-mediated adhesion is critical for cancer cell migration and invasion, and its dysregulation promotes metastasis. Altered expression or activation of integrins allows tumor cells to detach from the primary site and adhere to new environments. Autophagy crosstalk may further modulate adhesion during stress, influencing survival and dissemination. Therefore, targeting integrin adhesion is a therapeutic strategy in oncology.
Connective tissue disorders
Mutations in extracellular matrix proteins such as fibrillin-1 can differentially regulate integrin-mediated cell adhesion, contributing to connective tissue diseases like Marfan syndrome. These mutations alter the interaction between matrix ligands and integrins, affecting cell behavior and tissue integrity. Studying these effects requires adhesion assays and genetic models.
Other adhesion-related pathologies
Defects in integrin signaling or adhesion turnover are implicated in inflammatory diseases, fibrosis, and developmental abnormalities. Protein disulfide isomerase-dependent adhesion may be relevant to thrombosis and cancer. Calcium and phosphoinositide signaling defects can also impact adhesion. Understanding these mechanisms can guide targeted therapies.
From cell adhesion mediated by integrin-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of ITGB1 abolish integrin-mediated adhesion? | CRISPR knockout of ITGB1 in a cell line followed by adhesion assay |
| Does a disease-associated FBN1 mutation alter integrin adhesion? | Point mutation knock-in of FBN1 in cells |
| Can talin-1 rescue adhesion after miRNA-200c-3p overexpression? | Overexpression of TLN1 or miRNA-resistant TLN1 |
| Where does PLCD1 localize during adhesion? | Tagged knock-in of PLCD1 with fluorescent protein |
| Does protein disulfide isomerase inhibition block adhesion? | Knockout or chemical inhibition of P4HB |
| How does autophagy affect adhesion dynamics? | Knockout of ATG5 or BECN1 and live imaging |
How to Study the cell adhesion mediated by integrin Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Adhesion assay | Number of cells attached to matrix | Testing knockout or inhibitor effects |
| Live-cell TIRF microscopy | Dynamics of focal adhesions | Visualizing integrin clustering |
| Calcium imaging | Intracellular calcium levels | Linking calcium signaling to adhesion |
| Phosphoinositide quantification | PIP2 levels | Assessing PLCD1 effects |
| Immunoblotting | Protein expression and phosphorylation | Validating CRISPR knockouts |
| CRISPR screen | Gene essentiality for adhesion | Discovery of novel regulators |
| Disulfide exchange assay | Extracellular redox state | Testing P4HB function |
| Autophagy flux assay | Autophagic activity | Studying crosstalk with adhesion |
Adhesion assays
Integrin-dependent adhesion can be measured using established protocols such as adhesion to purified matrix proteins, which quantify the number of attached cells after washing. These assays are used to test the effects of genetic perturbations or inhibitors.
Live-cell imaging and microscopy
Fluorescence microscopy of tagged integrins, talin-1, or vinculin allows visualization of adhesion assembly and turnover in real time. Total internal reflection fluorescence (TIRF) microscopy is particularly useful for studying focal adhesions near the plasma membrane.
CRISPR-based genetic screens
Pooled CRISPR knockout screens can identify genes required for integrin-mediated adhesion, such as integrin subunits and adaptors. These screens are powerful for unbiased discovery of novel regulators.
Biochemical signaling assays
Calcium imaging, phosphoinositide measurements, and immunoblotting for phosphorylated FAK can reveal signaling downstream of integrin engagement. These methods complement adhesion assays to provide mechanistic insight.
How CRISPR Can Be Used to Study GO:0033627 cell adhesion mediated by integrin
Knockout
CRISPR knockout of integrin subunits (e.g., ITGB1) or adaptors (e.g., TLN1) is used to test their requirement for integrin-mediated adhesion. Knockout cell lines can be subjected to adhesion assays to quantify loss of attachment. This approach provides causal evidence for gene function in GO:0033627.
Point Mutation
Point mutations can be introduced into integrin genes or matrix proteins to model disease-associated variants, such as those in FBN1, and to assess their differential effects on adhesion. CRISPR base editing or homology-directed repair enables precise mutation knock-in.
Knock-in
Knock-in of fluorescent tags (e.g., GFP) into endogenous loci such as PLCD1 or ITGB1 allows real-time imaging of protein localization during adhesion. This approach preserves endogenous regulation and is valuable for studying dynamics.
Overexpression
Overexpression of cDNAs, such as miRNA-resistant TLN1, can rescue or enhance adhesion and test sufficiency. Overexpression of constitutively active RAP1A can promote integrin activation. These models complement loss-of-function studies.
How EDITGENE Supports cell adhesion mediated by integrin Research
Researchers studying cell adhesion mediated by integrin-related genes often need to determine whether a candidate gene is causally involved in adhesion, migration, or disease. EDITGENE provides CRISPR-based cell model services to enable such functional studies with high precision and reproducibility.
Contact EDITGENE today to design your custom CRISPR model for cell adhesion mediated by integrin research.
Frequently Asked Questions About cell adhesion mediated by integrin
What is cell adhesion mediated by integrin?
It is the biological process (GO:0033627) where a cell attaches to another cell or extracellular matrix via integrin heterodimers.
What genes are involved in integrin-mediated cell adhesion?
Key genes include ITGB1, ITGB3, ITGAV, ITGA5, TLN1, P4HB, PLCD1, and FBN1, among others.
How is integrin-mediated adhesion regulated?
It is regulated by extracellular disulfide exchange, calcium signaling, phosphoinositide levels, and microRNAs such as miRNA-200c-3p.
Why is integrin-mediated adhesion important in cancer?
It controls migration and invasion, and its dysregulation promotes metastasis.
What diseases are linked to defects in integrin adhesion?
Cancer, connective tissue disorders like Marfan syndrome, and other adhesion-related pathologies.
How can I study integrin-mediated adhesion in the lab?
Use adhesion assays, live imaging, and CRISPR knockouts of candidate genes.
What is the role of talin-1 in integrin adhesion?
Talin-1 activates integrins and links them to actin; its levels are controlled by miRNA-200c-3p.
Does protein disulfide isomerase affect integrin adhesion?
Yes, it catalyzes extracellular disulfide exchange required for efficient adhesion.
How does calcium influence integrin-mediated adhesion?
Calcium signals modulate integrin affinity and adhesion strength.
Can CRISPR be used to study integrin-mediated adhesion?
Yes, knockout, point mutation, knock-in, and overexpression models are widely used.
Conclusion
GO:0033627, cell adhesion mediated by integrin, is a central biological process that governs how cells interact with their environment. Its molecular basis involves integrin heterodimers, talin-1, protein disulfide isomerase, calcium signaling, and phosphoinositide metabolism, all of which are tightly regulated. Dysregulation of this process contributes to cancer, connective tissue disorders, and other diseases. Experimental approaches including adhesion assays, imaging, and CRISPR-based genetic models are essential for dissecting its mechanisms. Continued research into integrin-mediated adhesion will provide insights into basic cell biology and therapeutic opportunities.
References
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- 3. Sjaastad MD et al.. 1997. Integrin-mediated calcium signaling and regulation of cell adhesion by intracellular calcium.. Bioessays 19(1):47-55 PMID: 9008416
- 4. Obeng G et al.. 2021. miRNA-200c-3p targets talin-1 to regulate integrin-mediated cell adhesion.. Sci Rep 11(1):21597 PMID: 34732818
- 5. Vlahakis A et al.. 2017. The Interconnections between Autophagy and Integrin-Mediated Cell Adhesion.. J Mol Biol 429(4):515-530 PMID: 27932295
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- 8. Yoneda A et al.. 2026. Phospholipase C δ1 affects integrin-mediated cell adhesion and migration by altering available phosphatidylinositol 4,5-bisphosphate levels.. Exp Cell Res 455(1):114857 PMID: 41391593
