GO:0097699 vascular endothelial cell response to fluid shear stress: Mechanosensory Complex, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0097699 describes how vascular endothelial cells sense and respond to fluid shear stress, the frictional force of blood flow on the vessel wall.
• The core mechanosensory complex includes PECAM1, VE-cadherin (CDH5), and VEGFR2, which convert mechanical force into biochemical signals.
• Downstream responses include activation of PIEZO1, ATP release, calcium signaling, and changes in gene expression that regulate vascular tone and remodeling.
• Dysregulated shear stress responses contribute to atherosclerosis, hypertension, and aging-related vascular dysfunction.
• Key effector genes include UCP2, NDRG1, ADM, and PIEZO1, which modulate inflammation, metabolism, and blood pressure.
• CRISPR-based knockout, knock-in, and overexpression models enable causal testing of mechanosensitive genes in endothelial cells.
Description
Vascular endothelial cells line the inner surface of blood vessels and are constantly exposed to fluid shear stress, the tangential frictional force generated by flowing blood. The Gene Ontology term GO:0097699, vascular endothelial cell response to fluid shear stress, captures the biological processes by which these cells detect and respond to this mechanical cue. This response is critical for maintaining vascular homeostasis, regulating vascular tone, and preventing disease. Understanding GO:0097699 is essential for researchers studying mechanotransduction, atherosclerosis, and hypertension, as it links physical forces to molecular signaling and gene expression. The term encompasses rapid events such as ion channel activation and ATP release, as well as long-term changes in cell morphology, metabolism, and inflammatory state. This article synthesizes authoritative QuickGO data and verified PubMed literature to provide a research-grade overview of the genes, mechanisms, and experimental models relevant to GO:0097699.
vascular endothelial cell response to fluid shear stress At A Glance
| GO ID | GO:0097699 |
|---|---|
| GO term | vascular endothelial cell response to fluid shear stress |
| Ontology | biological_process |
| Synonym | blood vessel endothelial cell response to fluid shear stress |
| Major function | Mechanosensory transduction of fluid shear stress into cellular signaling and functional adaptation |
| Key mechanosensory complex | PECAM1, CDH5 (VE-cadherin), VEGFR2 |
| Downstream effectors | PIEZO1, UCP2, NDRG1, ADM |
| Associated diseases | Atherosclerosis, hypertension, vascular remodeling |
What Is GO:0097699?
GO:0097699 is defined as any response to fluid shear stress in a vascular endothelial cell. In other words, it refers to the collection of cellular and molecular processes triggered when endothelial cells experience the shear force of blood flow. This includes sensing the mechanical stimulus, transducing it into biochemical signals, and executing downstream functional changes such as alterations in gene expression, metabolism, and cell behavior.
Why Is vascular endothelial cell response to fluid shear stress Important in Cell Biology?
GO:0097699 is important because fluid shear stress is a fundamental biomechanical signal that continuously regulates endothelial cell phenotype and vascular function. Disruption of this response is a key initiating factor in atherosclerosis, hypertension, and age-related vascular disease. Studying this process helps identify therapeutic targets and biomarkers for cardiovascular disorders.
• Maintains vascular tone and blood pressure through shear-induced signaling such as adrenomedullin and PIEZO1.
• Prevents atherosclerosis by promoting anti-inflammatory and anti-oxidative endothelial phenotypes.
• Regulates endothelial metabolism and aging, with implications for age-related vascular dysfunction.
• Controls vascular remodeling in response to hemodynamic changes.
• Provides a paradigm for mechanotransduction research across cell types.
• Involves ion channels and membrane receptors that are druggable targets.
• Links physical forces to gene expression programs, offering insights into epigenetic and transcriptional regulation.
• Dysregulation contributes to hypertension and cardiovascular mortality.
• Enables development of in vitro models for drug screening and disease modeling.
• Highlights the importance of shear stress in tissue engineering and vascular grafts.
What Happens During vascular endothelial cell response to fluid shear stress?
Mechanosensing at the cell surface
In simple terms: The cell first feels the force of flowing blood through a sensor complex on its surface.
The endothelial mechanosensory complex, composed of PECAM1, VE-cadherin (CDH5), and VEGFR2, is activated by fluid shear stress. This complex transmits mechanical force into biochemical signals, including phosphorylation of VEGFR2 and activation of downstream kinases. This step is essential for converting shear stress into intracellular responses.
Ion channel activation and ATP release
In simple terms: Special channels open to let ions and ATP out, triggering signaling.
The cation channel PIEZO1 is activated by shear stress and mediates flow-induced ATP release from endothelial cells. This ATP then acts on purinergic receptors to modulate vascular tone and blood pressure. This represents a rapid, force-dependent signaling mechanism.
Calcium signaling and downstream kinase cascades
In simple terms: Calcium levels rise inside the cell, turning on many signaling proteins.
Shear stress induces calcium influx and activation of signaling pathways such as PI3K/Akt and MAPK. These cascades lead to changes in gene expression and cell behavior. Calcium serves as a key second messenger in this response.
Transcriptional and metabolic reprogramming
In simple terms: The cell changes which genes are turned on and how it uses energy.
Sustained shear stress alters the expression of genes involved in inflammation, oxidative stress, and metabolism. For example, UCP2 is a mechanosensitive suppressor of atherosclerosis, and NDRG1 is essential for endothelial inflammation and vascular remodeling. These changes contribute to long-term adaptation.
Functional outcomes: vascular tone and remodeling
In simple terms: The final result is adjustment of blood vessel diameter and structure.
Shear stress-induced adrenomedullin signaling regulates vascular tone and blood pressure. Chronic responses include cytoskeletal reorganization and vascular remodeling to maintain homeostasis.
Key Genes Involved in GO:0097699 vascular endothelial cell response to fluid shear stress
The following genes and proteins are central to the vascular endothelial cell response to fluid shear stress, as supported by published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| PECAM1 | Core mechanosensory complex component | Knockout studies reveal its role in shear stress sensing |
| CDH5 (VE-cadherin) | Core mechanosensory complex component | Essential for endothelial junction mechanotransduction |
| VEGFR2 (KDR) | Core mechanosensory complex component | Shear-induced activation; target for angiogenesis research |
| PIEZO1 | Shear-activated cation channel | Mediates ATP release and blood pressure control |
| UCP2 | Mitochondrial uncoupling protein | Mechanosensitive suppressor of atherosclerosis |
| NDRG1 | Stress response protein | Essential for endothelial inflammation and remodeling |
| ADM (adrenomedullin) | Vasoactive peptide | Shear-induced signaling regulates vascular tone |
| eNOS (NOS3) | Nitric oxide synthase | Produces NO in response to shear stress; vasodilation |
| KLF2 | Transcription factor | Shear-induced anti-inflammatory and anti-thrombotic gene program |
| KLF4 | Transcription factor | Shear-responsive regulator of endothelial phenotype |
| NF-κB | Transcription factor | Shear stress modulates inflammatory signaling |
| HIF1A | Hypoxia-inducible factor | Cross-talk with shear stress in metabolism |
| AMPK | Energy sensor kinase | Shear stress activates AMPK to regulate metabolism |
| SIRT1 | Deacetylase | Shear stress modulates SIRT1 activity in aging |
| PI3K | Kinase | Downstream of mechanosensory complex |
| AKT1 | Kinase | Shear-induced activation promotes survival and NO production |
| MAPK1/3 (ERK1/2) | Kinases | Shear stress activates MAPK cascades |
| CaMKKβ | Calcium/calmodulin-dependent kinase | Links calcium signaling to AMPK in shear response |
How Is vascular endothelial cell response to fluid shear stress Regulated?
The vascular endothelial cell response to fluid shear stress is regulated at multiple levels. The mechanosensory complex (PECAM1, CDH5, VEGFR2) initiates signaling. Ion channels such as PIEZO1 mediate rapid calcium influx and ATP release. Downstream kinases including PI3K/Akt, MAPK, and AMPK modulate transcriptional programs. Metabolic regulators such as UCP2 and SIRT1 fine-tune the response and are implicated in aging. Inflammatory signaling via NF-κB and NDRG1 is also modulated by shear stress. Additionally, adrenomedullin signaling regulates vascular tone. This multi-layered regulation ensures appropriate adaptation to hemodynamic forces.
vascular endothelial cell response to fluid shear stress and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| UCP2 | Atherosclerosis | Endothelial-specific knockout mouse |
| NDRG1 | Vascular remodeling, inflammation | Knockout or knockdown in endothelial cells |
| PIEZO1 | Hypertension | Point mutation knock-in or knockout mouse |
| ADM | Blood pressure regulation | Overexpression or knockout models |
| KLF2 | Atheroprotection | Endothelial-specific overexpression |
Atherosclerosis
Disturbed or low shear stress at arterial branch points promotes endothelial dysfunction and atherosclerosis. The mechanosensory complex and downstream effectors such as UCP2 and NDRG1 are critical in this process. UCP2 acts as a mechanosensitive suppressor of atherosclerosis, and its loss exacerbates plaque formation. NDRG1 is essential for endothelial inflammation and vascular remodeling, contributing to atherogenesis. Aging further impairs shear stress responses, accelerating atherosclerosis.
Hypertension
Shear stress-induced signaling regulates vascular tone and blood pressure. PIEZO1 mediates flow-induced ATP release, and its dysfunction is linked to hypertension. Adrenomedullin signaling, induced by shear stress, also regulates blood pressure. Thus, defects in GO:0097699 can lead to hypertensive phenotypes.
Vascular remodeling and aging
Chronic changes in shear stress trigger vascular remodeling. NDRG1 is essential for this process. Aging alters endothelial metabolism and shear stress responses, contributing to vascular dysfunction. These changes increase susceptibility to cardiovascular diseases.
From vascular endothelial cell response to fluid shear stress-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X mediate shear-induced ATP release? | PIEZO1 knockout or point mutation |
| Is gene Y required for shear-induced anti-inflammatory signaling? | Endothelial-specific knockout of Y |
| Does a disease-associated mutation in gene Z alter mechanosensing? | Knock-in of point mutation |
| Can overexpression of gene W protect against atherosclerosis? | Endothelial-specific overexpression |
| What is the role of gene V in vascular tone regulation? | Knockout or knockdown followed by blood pressure measurement |
| How does aging affect shear stress response genes? | Aged vs young endothelial cells with gene editing |
How to Study the vascular endothelial cell response to fluid shear stress Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Parallel-plate flow chamber | Shear stress response | In vitro endothelial mechanotransduction |
| CRISPR knockout | Gene function | Testing necessity of candidate genes |
| RNA-seq | Transcriptional changes | Identifying shear-sensitive gene programs |
| Proteomics | Protein expression and modifications | Mapping signaling networks |
| Calcium imaging | Intracellular calcium levels | Measuring rapid shear-induced signaling |
| ATP luminescence assay | ATP release | Quantifying PIEZO1-mediated ATP release |
| Western blot | Protein phosphorylation | Detecting VEGFR2 or Akt activation |
| Blood pressure telemetry | Vascular tone in vivo | Assessing PIEZO1 or ADM function |
In vitro shear stress systems
Controlled shear stress can be applied to cultured endothelial cells using cone-and-plate or parallel-plate flow chambers. These systems allow precise modulation of shear magnitude and duration, enabling studies of mechanotransduction.
Genetic manipulation with CRISPR
CRISPR/Cas9 knockout, knock-in, and overexpression models are used to test the causal role of specific genes in the shear stress response. For example, PIEZO1 knockout abolishes flow-induced ATP release, and UCP2 knockout exacerbates atherosclerosis.
Transcriptomics and proteomics
RNA-seq and proteomics can identify global changes in gene and protein expression following shear stress. These approaches have revealed shear-sensitive pathways such as KLF2/4 and NDRG1.
Live-cell imaging and calcium signaling
Fluorescent calcium indicators and live-cell imaging allow real-time monitoring of shear-induced calcium influx and signaling dynamics.
How CRISPR Can Be Used to Study GO:0097699 vascular endothelial cell response to fluid shear stress
Knockout
CRISPR knockout of genes such as PECAM1, CDH5, VEGFR2, PIEZO1, UCP2, or NDRG1 in endothelial cells or mouse models can test their requirement for shear stress responses. For example, PIEZO1 knockout abolishes flow-induced ATP release, and UCP2 knockout increases atherosclerosis.
Point Mutation
Knock-in of disease-associated point mutations can model altered mechanosensing. For instance, mutations in PIEZO1 linked to hypertension can be introduced to study their effect on ATP release and blood pressure.
Knock-in
Tagged knock-in of mechanosensory complex components (e.g., GFP-PECAM1) allows live-cell imaging of protein dynamics under shear stress. Knock-in of reporter genes can also monitor transcriptional responses.
Overexpression
Overexpression of protective genes such as UCP2 or KLF2 in endothelial cells can test their ability to suppress atherosclerosis or inflammation under shear stress.
How EDITGENE Supports vascular endothelial cell response to fluid shear stress Research
Researchers studying vascular endothelial cell response to fluid shear stress-related genes often need to determine whether a candidate gene is causally involved in mechanotransduction, vascular tone regulation, or disease progression. EDITGENE provides comprehensive CRISPR-based services to accelerate this research.
Contact EDITGENE today to design your custom CRISPR model for vascular endothelial cell response to fluid shear stress research.
Frequently Asked Questions About vascular endothelial cell response to fluid shear stress
What is GO:0097699?
GO:0097699 is the Gene Ontology term for vascular endothelial cell response to fluid shear stress, describing how endothelial cells sense and respond to blood flow forces.
What genes are involved in vascular endothelial cell response to fluid shear stress?
Key genes include PECAM1, CDH5, VEGFR2, PIEZO1, UCP2, NDRG1, and ADM.
How do endothelial cells sense fluid shear stress?
They use a mechanosensory complex of PECAM1, VE-cadherin, and VEGFR2, as well as ion channels like PIEZO1.
What is the role of PIEZO1 in shear stress response?
PIEZO1 is a cation channel that mediates flow-induced ATP release and controls blood pressure.
How does shear stress protect against atherosclerosis?
Shear stress induces anti-inflammatory and anti-oxidative programs, partly via UCP2 and KLF2, suppressing atherosclerosis.
What diseases are linked to defective shear stress responses?
Atherosclerosis, hypertension, and vascular remodeling are linked to dysregulated shear stress responses.
What experimental models are used to study GO:0097699?
In vitro flow chambers, CRISPR knockout/knock-in mice, and endothelial cell culture are commonly used.
How does aging affect endothelial shear stress response?
Aging alters endothelial metabolism and impairs shear stress responses, promoting atherosclerosis.
What is the role of NDRG1 in endothelial cells?
NDRG1 is essential for endothelial inflammation and vascular remodeling under shear stress.
Can CRISPR be used to study shear stress response genes?
Yes, CRISPR knockout, knock-in, and overexpression are powerful tools to test gene function in mechanotransduction.
Conclusion
GO:0097699, vascular endothelial cell response to fluid shear stress, is a fundamental biological process that integrates mechanical forces with cellular signaling to maintain vascular health. The mechanosensory complex, ion channels, and downstream effectors such as PIEZO1, UCP2, and NDRG1 are critical players. Dysregulation of this process contributes to atherosclerosis, hypertension, and aging-related vascular disease. Continued research using CRISPR-based models and advanced omics will further elucidate the mechanisms and identify therapeutic targets.
References
- 1. Tzima E et al.. 2005. A mechanosensory complex that mediates the endothelial cell response to fluid shear stress.. Nature 437(7057):426-31 PMID: 16163360
- 2. Krüger-Genge A et al.. 2019. Vascular Endothelial Cell Biology: An Update.. Int J Mol Sci 20(18) PMID: 31500313
- 3. Iring A et al.. 2019. Shear stress-induced endothelial adrenomedullin signaling regulates vascular tone and blood pressure.. J Clin Invest 129(7):2775-2791 PMID: 31205027
- 4. Ando J et al.. 2009. Vascular mechanobiology: endothelial cell responses to fluid shear stress.. Circ J 73(11):1983-92 PMID: 19801852
- 5. Wang WL et al.. 2025. Impacts of aging and fluid shear stress on vascular endothelial metabolism and atherosclerosis development.. J Biomed Sci 32(1):83 PMID: 40890841
- 6. Luo JY et al.. 2022. Endothelial UCP2 Is a Mechanosensitive Suppressor of Atherosclerosis.. Circ Res 131(5):424-441 PMID: 35899624
- 7. Zhang G et al.. 2023. NDRG1 Signaling Is Essential for Endothelial Inflammation and Vascular Remodeling.. Circ Res 132(3):306-319 PMID: 36562299
- 8. Wang S et al.. 2016. Endothelial cation channel PIEZO1 controls blood pressure by mediating flow-induced ATP release.. J Clin Invest 126(12):4527-4536 PMID: 27797339
