GO:2000097 regulation of smooth muscle cell-matrix adhesion: Signaling Mechanism, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:2000097 (regulation of smooth muscle cell-matrix adhesion) is a biological process that modulates the frequency, rate, or extent of adhesion between smooth muscle cells and the extracellular matrix.
• Smooth muscle cell-matrix adhesion is dynamically regulated by integrins, focal adhesion proteins, and mechanosensitive signaling, and is central to vascular tone, airway reactivity, and tissue remodeling [1,5].
• Key molecular players include smooth muscle alpha-actin (ACTA2), nidogen-2 (NID2), focal adhesion kinase (PTK2/FAK), and calcium-dependent signaling [2,3,5,7].
• Dysregulation of this process contributes to arterial stiffening, neointima formation, atherosclerosis, and asthma-related airway remodeling [1,2,4,8].
• CRISPR-based knockout, point mutation, knock-in, and overexpression models enable causal dissection of genes regulating smooth muscle cell-matrix adhesion [3,5].
• Studying GO:2000097 requires integrating live-cell imaging, atomic force microscopy, traction force microscopy, and transcriptomic/proteomic profiling [6,7].
Description
Smooth muscle cells (SMCs) are specialized contractile cells that reside in the walls of blood vessels, airways, and other hollow organs. Their ability to adhere to the surrounding extracellular matrix (ECM) is fundamental for maintaining tissue architecture, transmitting mechanical forces, and coordinating contractile responses. The Gene Ontology term GO:2000097, regulation of smooth muscle cell-matrix adhesion, describes any process that modulates the frequency, rate, or extent of adhesion between a smooth muscle cell and the ECM. This process is not static; it is dynamically tuned by integrin signaling, cytoskeletal remodeling, and mechanical cues [5,6]. Understanding how smooth muscle cell-matrix adhesion is regulated has broad implications for human health. In the vasculature, altered adhesion contributes to arterial stiffening during aging and disease, and to pathological neointima formation after vascular injury [1,2]. In the airways, adhesion-dependent signaling influences smooth muscle immunomodulatory functions relevant to asthma. Moreover, adhesion sites serve as mechanosensory hubs that convert extracellular forces into intracellular biochemical signals, affecting cell stiffness, migration, and proliferation [3,7]. This article provides a research-grade overview of GO:2000097, integrating authoritative GO definitions with published literature. We cover the molecular mechanisms, key genes, disease relevance, and state-of-the-art methods including CRISPR-based models for functional interrogation. The content is designed for researchers seeking to understand or manipulate smooth muscle cell-matrix adhesion in cardiovascular, respiratory, and regenerative biology.
regulation of smooth muscle cell-matrix adhesion At A Glance
| GO ID | GO:2000097 |
|---|---|
| GO term | regulation of smooth muscle cell-matrix adhesion |
| Ontology | biological_process |
| Synonym | none |
| Major function | Modulates the frequency, rate, or extent of adhesion between smooth muscle cells and the extracellular matrix |
| Related cellular component | Focal adhesions, integrin complexes, actin cytoskeleton |
| Related molecular function | Integrin binding, kinase activity (e.g., FAK), calcium-dependent signaling |
| Associated diseases | Arterial stiffening, neointima formation, atherosclerosis, asthma |
| Research methods | CRISPR knockout/knock-in, live-cell imaging, atomic force microscopy, traction force microscopy |
What Is GO:2000097?
GO:2000097, regulation of smooth muscle cell-matrix adhesion, is defined as any process that modulates the frequency, rate, or extent of smooth muscle cell-matrix adhesion. In other words, it encompasses all molecular and cellular events that control how tightly or loosely a smooth muscle cell attaches to components of the extracellular matrix, such as collagen, elastin, fibronectin, and laminin. This regulation can occur through changes in integrin activation, focal adhesion assembly and disassembly, cytoskeletal tension, and signaling cascades triggered by mechanical or chemical stimuli [1,5].
Why Is regulation of smooth muscle cell-matrix adhesion Important in Cell Biology?
Regulation of smooth muscle cell-matrix adhesion is critical for normal physiology and is frequently disrupted in disease. In blood vessels, SMC-ECM adhesion maintains vascular tone and structural integrity; its dysregulation leads to arterial stiffening, a hallmark of aging and cardiovascular disease. In airway smooth muscle, adhesion-dependent signaling modulates immunomodulatory functions that contribute to asthma pathogenesis. Furthermore, adhesion sites are mechanosensitive platforms that translate mechanical forces into biochemical signals, influencing cell proliferation, migration, and matrix remodeling [3,5]. Understanding GO:2000097 therefore offers insights into fundamental cell biology and potential therapeutic targets for cardiovascular and respiratory disorders.
• Maintains vascular tone and structural integrity by anchoring smooth muscle cells to the ECM.
• Dysregulation contributes to arterial stiffening during aging and hypertension.
• Involved in neointima formation after vascular injury, a key process in restenosis.
• Modulates airway smooth muscle immunomodulatory functions relevant to asthma.
• Serves as a mechanosensory hub converting mechanical forces into biochemical signals [3,5].
• Affects smooth muscle cell stiffness, migration, and proliferation.
• Plays a role in atherosclerosis development and progression.
• Provides targets for therapeutic intervention in cardiovascular and respiratory diseases [1,4].
• Enables study of cell-matrix interactions using advanced biophysical and imaging techniques [6,7].
• Offers opportunities for CRISPR-based functional genomics to identify causal genes [3,5].
What Happens During regulation of smooth muscle cell-matrix adhesion?
Integrin Activation and ECM Binding
In simple terms: Integrins on the cell surface switch to a high-affinity state and grab onto the matrix.
The initiation of smooth muscle cell-matrix adhesion involves the activation of integrin heterodimers, which undergo conformational changes to bind ECM ligands such as fibronectin, collagen, and laminin. This binding is regulated by intracellular signals including calcium and kinases. In vascular smooth muscle cells, integrin activation is coupled to contractile signaling and can be modulated by mechanical load. The specificity of integrin-ECM interactions determines downstream signaling and cellular responses.
Focal Adhesion Assembly and Cytoskeletal Linkage
In simple terms: A protein complex forms at the adhesion site and connects to the cell's internal skeleton.
Upon integrin engagement, a multi-protein complex called the focal adhesion assembles, including proteins such as FAK (PTK2), talin, paxillin, and vinculin. These proteins link integrins to the actin cytoskeleton, providing mechanical continuity and signaling platforms. Smooth muscle alpha-actin (ACTA2) is a key component of the contractile apparatus and its loss alters mechanosensing and cell-matrix adhesions. Nidogen-2 (NID2) maintains the contractile phenotype of vascular smooth muscle cells and prevents neointima formation by bridging Jagged1-Notch3 signaling.
Mechanotransduction and Signaling Feedback
In simple terms: The cell senses mechanical forces and adjusts its adhesion strength accordingly.
Adhesion sites are mechanosensitive; forces applied to integrins trigger conformational changes and activate signaling pathways, including FAK, Src, and Rho GTPases. This feedback modulates adhesion strength, cytoskeletal tension, and gene expression [3,5]. Oscillatory loading studies have shown that vascular smooth muscle cell-matrix adhesion exhibits switching behavior, dynamically alternating between strong and weak adhesion states. Intracellular calcium concentration ([Ca2+]) regulates cell stiffness and adhesion, as demonstrated by atomic force microscopy.
Adhesion Turnover and Remodeling
In simple terms: Adhesions are constantly broken down and rebuilt to allow cell movement and tissue remodeling.
Regulation of smooth muscle cell-matrix adhesion also involves disassembly of focal adhesions, mediated by kinases and phosphatases, to permit cell migration, proliferation, or structural remodeling. In pathological contexts such as atherosclerosis, excessive or altered adhesion contributes to plaque formation and vascular remodeling. Vasostatin-1, a fragment of chromogranin A, has been shown to inhibit atherogenesis, partly by modulating cell-matrix interactions. The balance between adhesion assembly and turnover is critical for tissue homeostasis.
Key Genes Involved in GO:2000097 regulation of smooth muscle cell-matrix adhesion
The following genes and proteins are central to the regulation of smooth muscle cell-matrix adhesion, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| ACTA2 | Smooth muscle alpha-actin; component of contractile apparatus and mechanosensing | Loss alters cell-matrix adhesions and mechanosensing |
| NID2 | Nidogen-2; ECM protein bridging Jagged1-Notch3 signaling | Maintains contractile phenotype, prevents neointima formation |
| PTK2 (FAK) | Focal adhesion kinase; key signaling node at focal adhesions | Central to adhesion signaling and contractility |
| ITGB1 | Integrin beta-1; ECM receptor | Mediates cell-matrix adhesion and mechanotransduction |
| ITGA5 | Integrin alpha-5; fibronectin receptor | Involved in adhesion and migration |
| VCL | Vinculin; focal adhesion protein linking integrins to actin | Regulates adhesion strength and cytoskeletal dynamics |
| TLN1 | Talin-1; activates integrins and links to actin | Essential for focal adhesion assembly |
| PXN | Paxillin; scaffold protein at focal adhesions | Modulates adhesion turnover and signaling |
| ACTN1 | Alpha-actinin-1; actin crosslinker | Contributes to cytoskeletal organization at adhesions |
| FLNA | Filamin A; actin-binding protein | Regulates mechanosensing and adhesion |
| JAG1 | Jagged1; Notch ligand | Interacts with NID2 to maintain contractile phenotype |
| NOTCH3 | Notch receptor 3 | Mediates signaling downstream of NID2 |
| CAV1 | Caveolin-1; membrane protein | Regulates integrin signaling and adhesion |
| RHO A | Rho GTPase; regulates cytoskeletal tension | Controls focal adhesion assembly |
| ROCK1 | Rho-associated kinase; effector of RhoA | Modulates contractility and adhesion |
| SRC | Src kinase; signaling at focal adhesions | Phosphorylates FAK and other adhesion proteins |
| CALM1 | Calmodulin; calcium sensor | Mediates calcium-dependent regulation of adhesion |
How Is regulation of smooth muscle cell-matrix adhesion Regulated?
Regulation of smooth muscle cell-matrix adhesion is controlled by multiple signaling pathways. Intracellular calcium ([Ca2+]) acts as a key second messenger; changes in [Ca2+]i directly affect cell stiffness and adhesion strength, as shown by atomic force microscopy. Focal adhesion kinase (FAK) and Src family kinases propagate signals from integrins to downstream effectors, including Rho GTPases, which modulate actomyosin contractility. Mechanical forces, such as oscillatory loading, can induce switching behavior in adhesion strength, highlighting dynamic regulation. Additionally, ECM composition and proteolytic remodeling influence adhesion stability. Nidogen-2 maintains the contractile phenotype of vascular smooth muscle cells via Jagged1-Notch3 signaling, thereby indirectly regulating adhesion.
regulation of smooth muscle cell-matrix adhesion and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| ACTA2 | Arterial stiffening, mechanosensing defects | ACTA2 knockout smooth muscle cells |
| NID2 | Neointima formation, vascular remodeling | NID2 knockout mouse model |
| PTK2 (FAK) | Cardiovascular remodeling, adhesion signaling | FAK conditional knockout in SMCs |
| ITGB1 | Atherosclerosis, vascular injury response | Integrin beta-1 knockout mice |
| CALM1 | Calcium-dependent adhesion regulation | CALM1 point mutation knock-in cells |
Arterial Stiffening and Cardiovascular Disease
Arterial stiffening is a hallmark of vascular aging and hypertension, and is driven in part by changes in smooth muscle cell-matrix adhesion and ECM remodeling. Lacolley et al. (2017) reviewed how vascular smooth muscle cells contribute to arterial stiffening through altered adhesion, cytoskeletal organization, and matrix deposition. Dysregulated adhesion also promotes neointima formation after vascular injury, a process in which nidogen-2 plays a protective role by maintaining the contractile phenotype. These findings suggest that targeting adhesion pathways could mitigate vascular pathology.
Atherosclerosis
Atherosclerosis involves chronic inflammation and lipid accumulation in arterial walls, with smooth muscle cells contributing to plaque stability and remodeling. Vasostatin-1, a chromogranin A-derived peptide, has been shown to inhibit atherogenesis in preclinical models, partly by modulating cell-matrix interactions and reducing adhesion-dependent inflammatory signaling. Thus, regulation of smooth muscle cell-matrix adhesion is a potential therapeutic axis in atherosclerosis.
Asthma and Airway Remodeling
In asthma, airway smooth muscle cells exhibit altered immunomodulatory functions and increased matrix adhesion, contributing to airway hyperresponsiveness and remodeling. Hirst (2003) reviewed how regulation of airway smooth muscle cell immunomodulatory function, including adhesion-dependent signaling, plays a role in asthma pathogenesis. Targeting adhesion molecules may therefore offer benefits in asthma management.
From regulation of smooth muscle cell-matrix adhesion-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does loss of ACTA2 affect cell-matrix adhesion? | ACTA2 knockout smooth muscle cells |
| How does NID2 maintain contractile phenotype? | NID2 knockout mouse and overexpression |
| What is the role of FAK in adhesion signaling? | FAK point mutation (kinase-dead) knock-in |
| How does calcium regulate adhesion strength? | CALM1 knock-in with altered calcium binding |
| Can overexpression of vasostatin-1 inhibit atherogenesis? | Vasostatin-1 overexpression in ApoE-/- mice |
| Does oscillatory loading alter adhesion dynamics? | Live-cell imaging with mechanical loading |
How to Study the regulation of smooth muscle cell-matrix adhesion Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Live-cell imaging | Focal adhesion dynamics | Real-time visualization of adhesion turnover |
| Traction force microscopy | Mechanical forces exerted on ECM | Quantifying adhesion strength and contractility |
| Atomic force microscopy | Cell stiffness and adhesion forces | Single-cell biomechanics |
| CRISPR knockout screen | Gene essentiality for adhesion | Identifying novel regulators |
| RNA-seq | Transcriptional changes | Profiling gene expression in adhesion models |
| Proteomics | Protein abundance and modifications | Mapping adhesion complex composition |
| Immunofluorescence | Localization of adhesion proteins | Visualizing focal adhesions |
| Western blot | Protein expression and phosphorylation | Validating signaling changes |
Live-Cell Imaging and Traction Force Microscopy
Live-cell imaging allows real-time visualization of focal adhesion dynamics in smooth muscle cells. Traction force microscopy measures the mechanical forces exerted by cells on the ECM, providing quantitative readouts of adhesion strength and contractility. These methods are essential for studying dynamic regulation of cell-matrix adhesion under mechanical load.
Atomic Force Microscopy (AFM)
AFM can measure cell stiffness and adhesion forces at the single-cell level. Zhu et al. (2018) used AFM to demonstrate that intracellular calcium concentration regulates vascular smooth muscle cell stiffness and adhesion. AFM is valuable for linking molecular perturbations to biomechanical properties.
CRISPR-Based Genetic Screens
CRISPR knockout and activation screens enable unbiased identification of genes regulating smooth muscle cell-matrix adhesion. Libraries targeting kinases, ECM proteins, and adhesion molecules can be applied in high-throughput assays to discover novel regulators [3,5].
Transcriptomics and Proteomics
RNA-seq and mass spectrometry-based proteomics can profile gene and protein expression changes in response to altered adhesion. These approaches help identify signaling networks and biomarkers associated with smooth muscle cell-matrix adhesion in health and disease [1,2].
How CRISPR Can Be Used to Study GO:2000097 regulation of smooth muscle cell-matrix adhesion
Knockout
CRISPR knockout of genes such as ACTA2, NID2, or PTK2 in smooth muscle cells can reveal their causal roles in cell-matrix adhesion. For example, ACTA2 knockout alters mechanosensing and adhesion, as demonstrated in published studies. Knockout models are ideal for loss-of-function experiments.
Point Mutation
Point mutations can be introduced to dissect specific domains or phosphorylation sites. For instance, kinase-dead FAK point mutants help distinguish scaffolding from catalytic functions in adhesion signaling. This approach provides mechanistic insights beyond simple knockout.
Knock-in
Knock-in of tagged or reporter genes allows tracking of adhesion proteins in live cells. Tagging endogenous NID2 or ITGB1 with fluorescent proteins enables real-time imaging of adhesion dynamics without overexpression artifacts.
Overexpression
Overexpression of candidate genes, such as vasostatin-1 or NID2, can test gain-of-function effects on adhesion and disease phenotypes. For example, vasostatin-1 overexpression inhibits atherogenesis in mouse models. Overexpression models are useful for validating therapeutic targets.
How EDITGENE Supports regulation of smooth muscle cell-matrix adhesion Research
Researchers studying regulation of smooth muscle cell-matrix adhesion-related genes often need to determine whether a candidate gene is causally involved in adhesion dynamics, and to dissect the underlying molecular mechanisms. EDITGENE provides a comprehensive suite of CRISPR-based services to accelerate this research, from gene knockout to precise point mutations and library screening.
Contact EDITGENE today to design your custom CRISPR model for regulation of smooth muscle cell-matrix adhesion research.
Frequently Asked Questions About regulation of smooth muscle cell-matrix adhesion
What is GO:2000097?
GO:2000097 is the Gene Ontology term for regulation of smooth muscle cell-matrix adhesion, defined as any process that modulates the frequency, rate, or extent of adhesion between a smooth muscle cell and the extracellular matrix.
What genes are involved in regulation of smooth muscle cell-matrix adhesion?
Key genes include ACTA2, NID2, PTK2 (FAK), ITGB1, VCL, TLN1, and others involved in integrin signaling and focal adhesion assembly [2,3,5].
How is smooth muscle cell-matrix adhesion regulated?
It is regulated by integrin activation, focal adhesion assembly, mechanotransduction, calcium signaling, and kinases such as FAK and Src [5,6,7].
Why is smooth muscle cell-matrix adhesion important in disease?
Dysregulation contributes to arterial stiffening, neointima formation, atherosclerosis, and asthma [1,2,4,8].
What methods are used to study smooth muscle cell-matrix adhesion?
Common methods include live-cell imaging, traction force microscopy, atomic force microscopy, CRISPR screens, and omics approaches [6,7].
How can CRISPR be used to study this process?
CRISPR knockout, point mutation, knock-in, and overexpression models allow causal interrogation of genes regulating adhesion [3,5].
What is the role of ACTA2 in cell-matrix adhesion?
ACTA2 encodes smooth muscle alpha-actin; its loss alters mechanosensing and cell-matrix adhesions.
How does nidogen-2 affect smooth muscle cells?
Nidogen-2 maintains the contractile phenotype and prevents neointima formation via Jagged1-Notch3 signaling.
What is the link between calcium and smooth muscle cell adhesion?
Intracellular calcium regulates cell stiffness and adhesion, as shown by atomic force microscopy.
Can targeting adhesion treat cardiovascular disease?
Modulating adhesion pathways, such as with vasostatin-1, has shown promise in inhibiting atherogenesis in preclinical models.
Conclusion
GO:2000097, regulation of smooth muscle cell-matrix adhesion, is a fundamental biological process that controls how smooth muscle cells interact with their extracellular environment. It is essential for vascular and airway physiology, and its dysregulation underlies major diseases including arterial stiffening, atherosclerosis, and asthma. Advances in CRISPR-based models and biophysical methods are enabling precise dissection of the molecular players and signaling networks involved. EDITGENE provides comprehensive services to support this research, from knockout and knock-in models to high-throughput screening and bioinformatics.
References
- 1. Lacolley P et al.. 2017. Vascular Smooth Muscle Cells and Arterial Stiffening: Relevance in Development, Aging, and Disease.. Physiol Rev 97(4):1555-1617 PMID: 28954852
- 2. Mao C et al.. 2021. Nidogen-2 Maintains the Contractile Phenotype of Vascular Smooth Muscle Cells and Prevents Neointima Formation via Bridging Jagged1-Notch3 Signaling.. Circulation 144(15):1244-1261 PMID: 34315224
- 3. Massett MP et al.. 2020. Loss of smooth muscle α-actin effects on mechanosensing and cell-matrix adhesions.. Exp Biol Med (Maywood) 245(4):374-384 PMID: 32064918
- 4. Hirst SJ. 2003. Regulation of airway smooth muscle cell immunomodulatory function: role in asthma.. Respir Physiol Neurobiol 137(2-3):309-26 PMID: 14516734
- 5. Ribeiro-Silva JC et al.. 2021. Focal adhesion signaling: vascular smooth muscle cell contractility beyond calcium mechanisms.. Clin Sci (Lond) 135(9):1189-1207 PMID: 33988229
- 6. Irons L et al.. 2020. Switching behaviour in vascular smooth muscle cell-matrix adhesion during oscillatory loading.. J Theor Biol 502:110387 PMID: 32603668
- 7. Zhu Y et al.. 2018. Regulation of Vascular Smooth Muscle Cell Stiffness and Adhesion by [Ca2+]i: An Atomic Force Microscopy-Based Study.. Microsc Microanal 24(6):708-712 PMID: 30516127
- 8. Sato Y et al.. 2018. Inhibitory effects of vasostatin-1 against atherogenesis.. Clin Sci (Lond) 132(23):2493-2507 PMID: 30401690
