GO:0090050 positive regulation of cell migration involved in sprouting angiogenesis: Signaling Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0090050 describes any process that increases the frequency, rate or extent of endothelial cell migration into the extracellular matrix during sprouting angiogenesis.
• The term is a biological process child of positive regulation of cell migration and is central to developmental and tumor angiogenesis.
• Key positive regulators include VEGFR2 signaling, Rap1b, JNK, HMGB1, and OPN3, which converge on cytoskeletal remodeling and matrix degradation.
• Dysregulation of this process contributes to diabetic retinopathy, abdominal aortic aneurysm, bladder cancer, and other angiogenesis-dependent diseases.
• CRISPR knockout, knock-in, point mutation, and overexpression models enable causal dissection of GO:0090050 regulators in endothelial cells.
• High-throughput CRISPR library screening combined with bioinformatics can identify novel modulators of sprouting angiogenesis.
Description
Sprouting angiogenesis is the process by which new blood vessels emerge from pre-existing vasculature, and it depends on the directed migration of endothelial cells into the extracellular matrix. The Gene Ontology term GO:0090050, positive regulation of cell migration involved in sprouting angiogenesis, captures the upstream and intracellular events that increase the frequency, rate, or extent of this specialized endothelial cell migration. Understanding this term is essential because it sits at the intersection of vascular development, wound healing, and pathological angiogenesis in cancer and ischemic disease.
positive regulation of cell migration involved in sprouting angiogenesis At A Glance
| GO ID | GO:0090050 |
|---|---|
| GO term | positive regulation of cell migration involved in sprouting angiogenesis |
| Ontology | biological_process |
| Synonym | none |
| Major function | Enhances endothelial cell migration into the extracellular matrix during sprouting angiogenesis |
| Parent term | positive regulation of cell migration |
| Related process | sprouting angiogenesis |
| Cellular context | endothelial cells, extracellular matrix |
| Regulatory direction | positive (increases frequency, rate or extent) |
What Is GO:0090050?
GO:0090050 is defined as any process that increases the frequency, rate or extent of cell migration involved in sprouting angiogenesis. In other words, it encompasses the molecular signals and cellular activities that promote endothelial cells to move directionally through the extracellular matrix to form new capillary sprouts. This term is a positive regulatory biological process and does not itself describe the migration event, but rather the enhancement of that event.
Why Is positive regulation of cell migration involved in sprouting angiogenesis Important in Cell Biology?
GO:0090050 is important because endothelial cell migration is a rate-limiting step in sprouting angiogenesis, and its positive regulation determines how quickly and extensively new vessels form. This process is critical during embryonic development, tissue repair, and the female reproductive cycle, but it also drives tumor vascularization and retinopathies. Consequently, identifying positive regulators of this migration step offers therapeutic opportunities to either promote revascularization in ischemic disease or inhibit pathological angiogenesis in cancer and diabetic retinopathy.
• Controls the speed and directionality of endothelial cell sprouting during angiogenesis.
• Integrates growth factor signaling, such as VEGF-VEGFR2, with cytoskeletal dynamics.
• Required for developmental vascular patterning and organogenesis.
• Contributes to tumor angiogenesis and cancer progression.
• Implicated in diabetic retinopathy and other ischemia-related eye diseases.
• Associated with abdominal aortic aneurysm pathogenesis.
• Provides targets for pro-angiogenic therapy in cardiovascular disease.
• Serves as a functional readout for CRISPR screens of angiogenesis modulators.
What Happens During positive regulation of cell migration involved in sprouting angiogenesis?
Initiation by pro-angiogenic signals
In simple terms: Growth factors tell endothelial cells to start moving.
Positive regulation begins when pro-angiogenic factors such as VEGF bind to receptors like VEGFR2 on endothelial cells, triggering intracellular signaling that promotes migration. OPN3 has been shown to positively regulate angiogenesis in HUVECs through interaction with VEGFR2. This step converts extracellular cues into intracellular motility programs.
Cytoskeletal remodeling and cell polarization
In simple terms: The cell changes its shape and builds a front and back to move.
Downstream of receptor activation, small GTPases such as Rap1b and kinases including JNK reorganize the actin cytoskeleton, leading to lamellipodia formation and cell polarization. Rap1b-deficient mice exhibit defective endothelial migration and angiogenesis, demonstrating its positive regulatory role. JNK acts as a positive regulator of angiogenic potential in endothelial cells.
Extracellular matrix degradation and invasion
In simple terms: The cell clears a path through the surrounding matrix.
Migrating endothelial cells secrete proteases and interact with integrins to degrade and remodel the extracellular matrix, allowing sprout extension. HMGB1 autocrine signaling enforces tumor angiogenesis and supports endothelial migration. This step is essential for the orderly movement of endothelial cells into the matrix.
Coordination with proliferation and tube formation
In simple terms: Migration is coupled with cell division and tube assembly.
Positive regulation of migration is coordinated with endothelial proliferation and subsequent tube formation to ensure functional vessel sprouting. MAPK signaling downstream of Rap1b links migration to proliferation in endothelial cells. This integration prevents aberrant sprouting and maintains vascular integrity.
Key Genes Involved in GO:0090050 positive regulation of cell migration involved in sprouting angiogenesis
The following genes and proteins have been experimentally implicated in the positive regulation of endothelial cell migration during sprouting angiogenesis.
| Gene | Major Role | Research Relevance |
|---|---|---|
| VEGFR2 | Receptor tyrosine kinase for VEGF; activates migration signaling | Central target for pro- and anti-angiogenic therapy |
| OPN3 | G-protein-coupled receptor; interacts with VEGFR2 to promote angiogenesis | Novel positive regulator in HUVECs |
| Rap1b | Small GTPase; controls cytoskeletal remodeling and endothelial migration | Knockout mice show defective angiogenesis |
| JNK | Stress-activated kinase; positively regulates angiogenic potential | Modulates endothelial migration and tube formation |
| HMGB1 | Nuclear protein with extracellular pro-angiogenic activity | Autocrine regulation enforces tumor angiogenesis |
| TRIM15 | E3 ubiquitin ligase; knockdown inhibits hepatic stellate cell activation | Potential indirect regulator of angiogenic microenvironment |
| miR-1-3p | MicroRNA; circulating biomarker for abdominal aortic aneurysm | May influence endothelial migration pathways |
| Ferroptosis-related genes | Iron-dependent cell death modulators | Linked to diabetic retinopathy and endothelial dysfunction |
| Krill oil components | Dietary factors with anti-angiogenic activity | Inhibit tumor-associated angiogenic vasculature |
| MAPK pathway components | Signaling cascade downstream of Rap1b | Required for endothelial migration and proliferation |
| Integrins | Cell-matrix adhesion receptors | Mediate migration through extracellular matrix |
| Matrix metalloproteinases | Extracellular matrix-degrading enzymes | Facilitate endothelial sprout invasion |
| VEGF | Primary pro-angiogenic growth factor | Activates VEGFR2 and downstream migration |
| Angiopoietin-2 | Vascular destabilizer; promotes sprouting | Context-dependent regulator of endothelial migration |
| Notch ligands | Cell-cell signaling in sprout tip/stalk selection | Modulate migration directionality |
| Wnt signaling components | Developmental pathways co-opted in angiogenesis | Regulate endothelial migration and proliferation |
| TGF-beta family ligands | Context-dependent regulators of endothelial behavior | Can promote or inhibit migration |
How Is positive regulation of cell migration involved in sprouting angiogenesis Regulated?
Positive regulation of cell migration involved in sprouting angiogenesis is controlled by a balance of pro- and anti-angiogenic signals. VEGFR2 activation by VEGF initiates downstream MAPK and PI3K-Akt pathways that promote cytoskeletal changes and migration. Rap1b is a key node whose deficiency impairs endothelial migration and MAPK signaling. JNK activity positively regulates angiogenic potential, and its inhibition reduces migration. HMGB1 autocrine loops sustain tumor angiogenesis by maintaining endothelial migration. Additionally, microRNAs such as miR-1-3p may modulate these pathways in vascular disease. This regulation ensures that sprouting occurs only when needed and is tightly coupled to tissue demands.
positive regulation of cell migration involved in sprouting angiogenesis and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| VEGFR2 | Tumor angiogenesis | Endothelial cell KO and overexpression |
| HMGB1 | Cancer angiogenesis | Autocrine signaling knockout in tumor models |
| Rap1b | Defective angiogenesis | Rap1b-deficient mouse model |
| miR-1-3p | Abdominal aortic aneurysm | Circulating biomarker validation |
| Ferroptosis-related genes | Diabetic retinopathy | Retinal endothelial cell models |
Cancer and tumor angiogenesis
Tumor angiogenesis relies on positive regulation of endothelial cell migration to form new blood vessels that supply nutrients and oxygen. HMGB1 autocrine signaling enforces tumor angiogenesis and supports endothelial migration. Krill oil has been shown to inhibit tumor-associated angiogenic vasculature in bladder cancer models, highlighting the therapeutic potential of targeting this process. OPN3-mediated positive regulation of angiogenesis through VEGFR2 further underscores the molecular complexity of tumor vascularization.
Diabetic retinopathy
Diabetic retinopathy is characterized by pathological retinal angiogenesis, in which positive regulation of endothelial cell migration contributes to vision-threatening neovascularization. Ferroptosis-related genes have been identified and validated in diabetic retinopathy, linking oxidative stress and iron metabolism to endothelial dysfunction. Targeting positive regulators of sprouting angiogenesis may offer new therapeutic avenues for this disease.
Abdominal aortic aneurysm
Abdominal aortic aneurysm involves vascular remodeling and aberrant angiogenesis. Serum miR-1-3p has been proposed as a circulating biomarker for this condition, and it may influence endothelial migration pathways. The positive regulation of cell migration involved in sprouting angiogenesis could contribute to aneurysm progression through neovascularization of the aortic wall.
Liver fibrosis
Liver fibrosis is associated with angiogenesis and hepatic stellate cell activation. Knockdown of TRIM15 inhibits the activation of hepatic stellate cells, which may indirectly affect the angiogenic microenvironment. Although direct evidence for GO:0090050 in liver fibrosis is limited, the interplay between stellate cells and endothelial cells suggests a potential role.
From positive regulation of cell migration involved in sprouting angiogenesis-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X positively regulate endothelial migration? | CRISPR knockout in HUVECs followed by migration assay |
| Does a specific point mutation in VEGFR2 alter migration? | Point-mutation knock-in in endothelial cells |
| Does overexpression of OPN3 enhance sprouting? | Overexpression in HUVECs and tube formation assay |
| Is Rap1b required for MAPK signaling during migration? | Rap1b knockout mouse and endothelial cells |
| Can JNK inhibition block angiogenic potential? | JNK inhibitor treatment in endothelial cells |
| Does HMGB1 autocrine signaling enforce tumor angiogenesis? | HMGB1 knockout in tumor xenografts |
How to Study the positive regulation of cell migration involved in sprouting angiogenesis Process
| Method | What It Measures | Typical Application |
|---|---|---|
| Transwell migration assay | Directional cell movement | Quantify endothelial migration after gene knockout |
| Scratch-wound assay | Collective cell migration | Assess positive regulation of migration speed |
| Tube formation assay | Angiogenic capacity in vitro | Evaluate sprouting after overexpression |
| CRISPR knockout screen | Gene requirement for migration | Identify novel positive regulators |
| Immunoblotting | Protein expression and phosphorylation | Analyze MAPK and VEGFR2 signaling |
| Immunofluorescence | Cytoskeletal organization and polarity | Visualize actin remodeling during migration |
| Mouse retinal angiogenesis model | In vivo sprouting | Study developmental and pathological angiogenesis |
| Bioinformatics pathway analysis | Enriched signaling networks | Interpret CRISPR screen hits |
In vitro migration assays
Transwell and scratch-wound assays are standard methods to measure endothelial cell migration, a direct readout of GO:0090050 activity. These assays can be combined with CRISPR knockout or overexpression to test causal roles of candidate genes. Tube formation assays on Matrigel further assess the angiogenic capacity of endothelial cells.
CRISPR screening and functional genomics
Genome-wide CRISPR knockout or activation screens in endothelial cells can identify novel positive regulators of migration involved in sprouting angiogenesis. Hits from such screens can be validated in secondary migration and sprouting assays. Bioinformatics analysis of screen data helps prioritize pathways and gene networks.
Animal models of angiogenesis
Mouse models such as Rap1b-deficient mice or tumor xenografts enable in vivo assessment of sprouting angiogenesis and endothelial migration. Retinal angiogenesis models are particularly useful for studying developmental and pathological sprouting. These models provide physiological context for GO:0090050 regulation.
Molecular signaling analysis
Western blotting, immunoprecipitation, and phospho-kinase arrays can dissect signaling pathways downstream of VEGFR2, Rap1b, and JNK during endothelial migration. HMGB1 autocrine loops can be studied using neutralizing antibodies or knockout models. These methods link molecular events to the positive regulation of migration.
How CRISPR Can Be Used to Study GO:0090050 positive regulation of cell migration involved in sprouting angiogenesis
Knockout
CRISPR knockout of candidate genes such as VEGFR2, Rap1b, or JNK in endothelial cells can abolish positive regulation of migration, confirming their essential roles. Knockout models are also used in mice to study developmental angiogenesis. These experiments provide causal evidence for gene function in GO:0090050.
Point Mutation
Point mutations can be introduced into genes like VEGFR2 to dissect specific phosphorylation sites or interaction domains required for positive regulation of migration. Such models help distinguish between signaling branches and identify critical residues. They are valuable for understanding how disease-associated variants affect angiogenesis.
Knock-in
Knock-in of tagged versions of proteins such as OPN3 or HMGB1 allows real-time tracking of their localization and interactions during endothelial migration. Fluorescent tags enable live-cell imaging of sprouting events. Knock-in models can also introduce human disease mutations into mouse genes for functional studies.
Overexpression
Overexpression of positive regulators like OPN3 or HMGB1 in endothelial cells enhances migration and sprouting, providing gain-of-function evidence. Overexpression models are useful for testing whether a gene is sufficient to drive angiogenesis. They can be combined with inhibitors to map downstream pathways.
How EDITGENE Supports positive regulation of cell migration involved in sprouting angiogenesis Research
Researchers studying positive regulation of cell migration involved in sprouting angiogenesis-related genes often need to determine whether a candidate gene is causally involved in endothelial migration or simply correlated with the process. EDITGENE provides a comprehensive suite of CRISPR-based services to establish causality, from knockout to precise point mutations, in relevant endothelial and disease models.
Contact EDITGENE today to design your custom CRISPR model for positive regulation of cell migration involved in sprouting angiogenesis research.
Frequently Asked Questions About positive regulation of cell migration involved in sprouting angiogenesis
What is GO:0090050?
GO:0090050 is the Gene Ontology term for positive regulation of cell migration involved in sprouting angiogenesis, describing processes that increase the frequency, rate or extent of endothelial cell migration during new blood vessel sprouting.
What genes are involved in positive regulation of cell migration involved in sprouting angiogenesis?
Key genes include VEGFR2, OPN3, Rap1b, JNK, and HMGB1, which have been experimentally shown to promote endothelial migration and angiogenesis.
How is positive regulation of cell migration involved in sprouting angiogenesis studied?
Researchers use in vitro migration assays, CRISPR knockout and overexpression models, animal models, and CRISPR screens to study this process.
What diseases are associated with GO:0090050?
Diseases include cancer, diabetic retinopathy, abdominal aortic aneurysm, and liver fibrosis, where aberrant angiogenesis contributes to pathology.
What is the role of VEGFR2 in sprouting angiogenesis?
VEGFR2 is a receptor tyrosine kinase that, upon VEGF binding, activates signaling pathways promoting endothelial cell migration and sprouting.
How does Rap1b regulate endothelial migration?
Rap1b is a small GTPase that controls cytoskeletal remodeling and MAPK signaling; its deficiency leads to defective endothelial migration and angiogenesis.
Can CRISPR be used to study positive regulation of cell migration involved in sprouting angiogenesis?
Yes, CRISPR knockout, knock-in, point mutation, and overexpression models enable causal dissection of genes regulating this process.
What is the role of JNK in angiogenesis?
JNK acts as a positive regulator of angiogenic potential in endothelial cells, influencing migration and tube formation.
How does HMGB1 affect tumor angiogenesis?
HMGB1 autocrine signaling enforces tumor angiogenesis by sustaining endothelial cell migration and vessel formation.
What models are available for studying GO:0090050?
Models include HUVEC migration assays, Rap1b-deficient mice, tumor xenografts, and CRISPR-engineered endothelial cell lines.
Conclusion
GO:0090050, positive regulation of cell migration involved in sprouting angiogenesis, is a critical biological process that governs how endothelial cells are instructed to migrate during new blood vessel formation. Its dysregulation underlies major diseases such as cancer, diabetic retinopathy, and abdominal aortic aneurysm. Continued research using CRISPR-based models and functional genomics will uncover new therapeutic targets to modulate angiogenesis in both health and disease.
References
- 1. Luo H et al.. 2025. OPN3-mediated positive regulation of angiogenesis in HUVECs through VEGFR2 interaction.. Commun Biol 8(1):529 PMID: 40164822
- 2. Lu C et al.. 2024. Identification and validation of ferroptosis-related genes for diabetic retinopathy.. Cell Signal 113:110955 PMID: 38084838
- 3. Jing J et al.. 2023. Clinical value of serum miR-1-3p as a potential circulating biomarker for abdominal aortic aneurysm.. Ann Med 55(2):2260395 PMID: 37751480
- 4. Chrzanowska-Wodnicka M et al.. 2008. Defective angiogenesis, endothelial migration, proliferation, and MAPK signaling in Rap1b-deficient mice.. Blood 111(5):2647-56 PMID: 17993608
- 5. Zhang J et al.. 2021. Knockdown of TRIM15 inhibits the activation of hepatic stellate cells.. J Mol Histol 52(4):839-848 PMID: 34142270
- 6. Kim H et al.. 2022. In vitro and in vivo anti-tumor efficacy of krill oil against bladder cancer: Involvement of tumor-associated angiogenic vasculature.. Food Res Int 156:111144 PMID: 35651016
- 7. Uchida C et al.. 2008. JNK as a positive regulator of angiogenic potential in endothelial cells.. Cell Biol Int 32(7):769-76 PMID: 18455449
- 8. van Beijnum JR et al.. 2013. Tumor angiogenesis is enforced by autocrine regulation of high-mobility group box 1.. Oncogene 32(3):363-74 PMID: 22391561
