GO:0001938 positive regulation of endothelial cell proliferation: Signaling Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0001938 describes any process that activates or increases the rate or extent of endothelial cell proliferation, a cornerstone of angiogenesis and vascular repair.
• Key molecular drivers include VEGFA and its receptor VEGFR2, with modulators such as B7-H3, OPN3, and ANGPTL4-SDC4 signaling.
• Endothelial proliferation is tightly coupled to metabolic cues, including lactate-driven M2 macrophage polarization and pericyte glycolysis.
• Dysregulated endothelial proliferation underlies cancer angiogenesis, ischemic disease, and impaired tissue regeneration.
• CRISPR knockout, point mutation, knock-in, and overexpression models enable causal dissection of GO:0001938 regulators.
• EDITGENE provides end-to-end CRISPR cell model and library screening services to accelerate vascular biology research.
Description
GO:0001938, positive regulation of endothelial cell proliferation, is a biological process term that encompasses any molecular event that activates or increases the rate or extent of endothelial cell division. Endothelial cells line the inner surface of blood vessels and their controlled proliferation is essential for angiogenesis, tissue repair, and regeneration after injury. This GO term is therefore central to understanding how new blood vessels form in development, wound healing, and disease. Researchers study GO:0001938 to identify pro-angiogenic signals, to dissect pathological vessel growth in tumors, and to develop therapies for ischemic and inflammatory conditions. The process is driven by a network of growth factors, receptors, metabolic enzymes, and cell-adhesion molecules that converge on endothelial cell cycle entry. Because endothelial proliferation is highly context-dependent, precise experimental models are required to determine whether a candidate gene causally promotes this process.
positive regulation of endothelial cell proliferation At A Glance
| GO ID | GO:0001938 |
|---|---|
| GO term | positive regulation of endothelial cell proliferation |
| Ontology | biological_process |
| Synonym | activation of endothelial cell proliferation; stimulation of endothelial cell proliferation; up regulation of endothelial cell proliferation; up-regulation of endothelial cell proliferation; upregulation of endothelial cell proliferation |
| Definition | Any process that activates or increases the rate or extent of endothelial cell proliferation. |
| Major function | Promotes endothelial cell division during angiogenesis, vascular repair, and regeneration. |
| Related processes | Angiogenesis, vasculogenesis, wound healing, tumor vascularization. |
| Key regulators | VEGFA, VEGFR2, B7-H3, OPN3, ANGPTL4, SDC4, lactate signaling. |
| Disease relevance | Cancer, ischemia, cardiovascular disease, impaired regeneration. |
What Is GO:0001938?
In our own words, GO:0001938 refers to any biological process that stimulates or enhances the proliferation of endothelial cells. It includes signaling events, transcriptional changes, metabolic shifts, and cell-cell interactions that collectively increase the number of endothelial cells through cell division. This term is a child of positive regulation of cell proliferation and is specifically restricted to endothelial cells, distinguishing it from general mitogenic processes.
Why Is positive regulation of endothelial cell proliferation Important in Cell Biology?
GO:0001938 is critically important because endothelial cell proliferation is the rate-limiting step in angiogenesis, a process required for embryonic development, tissue repair, and regeneration after ischemic injury. In cancer, excessive endothelial proliferation supports tumor growth and metastasis, making this process a major therapeutic target. Conversely, insufficient endothelial proliferation contributes to impaired wound healing and ischemic tissue damage. Understanding the positive regulators of endothelial proliferation therefore has broad implications for both basic vascular biology and clinical translation.
• Drives angiogenesis, the formation of new blood vessels from existing ones.
• Essential for tissue regeneration after injury, including bone and muscle repair.
• Supports tumor progression by promoting pathological angiogenesis.
• Modulated by metabolic signals such as lactate and glycolysis.
• Influenced by cell junction proteins and stress granule formation.
• Regulated by secreted factors like thrombospondin 1 and Reelin.
• Target for anti-angiogenic cancer therapies and pro-angiogenic regenerative medicine.
• Requires precise experimental models to distinguish causal from correlative roles.
• Involves cross-talk between endothelial cells, pericytes, and immune cells.
• Dysregulation linked to cardiovascular disease and chronic inflammation.
What Happens During positive regulation of endothelial cell proliferation?
Initiation by pro-angiogenic growth factors
In simple terms: Growth factors bind to receptors on endothelial cells and start a signal that tells the cell to divide.
Positive regulation of endothelial cell proliferation is typically initiated when pro-angiogenic factors such as VEGFA bind to VEGFR2 on the endothelial cell surface, triggering receptor autophosphorylation and downstream signaling. In colorectal cancer, B7-H3 activates the NF-kB pathway to induce VEGFA expression, thereby promoting angiogenesis. Similarly, OPN3 interacts with VEGFR2 to positively regulate angiogenesis in HUVECs. These ligand-receptor events are the first step in committing endothelial cells to proliferate.
Metabolic and microenvironmental modulation
In simple terms: The surrounding cells and metabolic conditions can either boost or dampen the proliferation signal.
Endothelial proliferation is modulated by metabolic cues from neighboring cells. Endothelial lactate uptake controls muscle regeneration from ischemia by inducing M2-like macrophage polarization, which in turn supports endothelial proliferation. In tumors, hexokinase 2-driven glycolysis in pericytes activates their contractility and leads to abnormal blood vessels, indirectly affecting endothelial proliferation. These findings highlight that GO:0001938 is not cell-autonomous but influenced by the metabolic state of the tissue.
Intracellular signaling and stress responses
In simple terms: Inside the cell, proteins interact to relay the signal and manage stress during rapid growth.
Intracellular signaling cascades, including NF-kB and VEGFR2 pathways, are central to positive regulation of endothelial cell proliferation. The tight junction protein ZO-1 interacts with YB-1 in endothelial cells to regulate stress granule formation during angiogenesis, linking cell junction integrity to proliferative signaling. Additionally, secreted factors such as thrombospondin 1 and Reelin act through Vldlr to regulate cardiac growth and repair, demonstrating that extracellular matrix and secreted proteins can modulate endothelial proliferation.
Outcomes: angiogenesis and tissue regeneration
In simple terms: When endothelial cells divide, they form new blood vessels that help repair damaged tissues.
The ultimate outcome of positive regulation of endothelial cell proliferation is the expansion of endothelial cell numbers, leading to new blood vessel formation. In bone, lymphatic vessels support regeneration after injury, a process that requires coordinated endothelial proliferation. In gastric cancer, COL1A1-positive endothelial cells promote progression via the ANGPTL4-SDC4 axis driven by endothelial-to-mesenchymal transition, illustrating how endothelial proliferation can become pathological. Thus, GO:0001938 is a double-edged sword: beneficial in regeneration and harmful in cancer.
Key Genes Involved in GO:0001938 positive regulation of endothelial cell proliferation
The following genes and proteins are experimentally validated regulators or effectors of positive regulation of endothelial cell proliferation, based on the cited literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| VEGFA | Primary pro-angiogenic growth factor | Induced by B7-H3/NF-kB in colorectal cancer |
| VEGFR2 | Receptor tyrosine kinase for VEGFA | Interacts with OPN3 to promote angiogenesis |
| B7-H3 | Immune checkpoint molecule | Activates NF-kB to induce VEGFA in colorectal cancer |
| OPN3 | Opsin-like photoreceptor | Positively regulates angiogenesis via VEGFR2 interaction |
| ANGPTL4 | Secreted angiopoietin-like protein | Drives endothelial-to-mesenchymal transition in gastric cancer |
| SDC4 | Syndecan-4 proteoglycan | Mediates ANGPTL4 signaling in endothelial cells |
| COL1A1 | Collagen type I alpha 1 | Marks a pro-tumor endothelial subset in gastric cancer |
| HK2 | Hexokinase 2 | Drives glycolysis in pericytes, affecting vessel abnormalities |
| ZO-1 | Tight junction protein | Interacts with YB-1 to regulate stress granules during angiogenesis |
| YB-1 | Y-box binding protein 1 | Partners with ZO-1 in endothelial stress granule formation |
| THBS1 | Thrombospondin 1 | Regulates cardiac growth and repair via Vldlr |
| RELN | Reelin | Acts through Vldlr to regulate cardiac repair |
| VLDLR | Very low density lipoprotein receptor | Mediates Reelin and thrombospondin 1 signaling in heart |
| Lactate | Metabolic signal | Controls muscle regeneration by inducing M2 macrophages |
| NF-kB | Transcription factor | Activated by B7-H3 to induce VEGFA |
| M2 macrophages | Immune cells | Polarized by endothelial lactate to support regeneration |
| Lymphatic endothelial cells | Specialized endothelial cells | Support bone regeneration after injury |
How Is positive regulation of endothelial cell proliferation Regulated?
Positive regulation of endothelial cell proliferation is controlled at multiple levels. Growth factor signaling through VEGFR2 is a primary upstream regulator, modulated by co-receptors such as OPN3. The NF-kB pathway is a key transcriptional regulator, as shown by B7-H3-mediated VEGFA induction. Metabolic regulation occurs through lactate and glycolysis, which influence macrophage polarization and pericyte contractility. Cell junction proteins like ZO-1 and RNA-binding proteins like YB-1 regulate stress granule formation, adding another layer of post-transcriptional control. Secreted factors such as thrombospondin 1 and Reelin act through Vldlr to modulate cardiac endothelial proliferation. Together, these pathways ensure that endothelial proliferation is tightly coupled to tissue demand and metabolic state.
positive regulation of endothelial cell proliferation and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| COL1A1 | Gastric cancer progression | Knockout in HUVECs or gastric cancer endothelial cells |
| B7-H3 | Colorectal cancer angiogenesis | Overexpression in colorectal cancer cell lines |
| OPN3 | Angiogenesis regulation | Knockout in HUVECs |
| ZO-1 | Angiogenesis and stress granules | Point mutation in endothelial cells |
| VLDLR | Cardiac growth and repair | Knockout mouse model |
Cancer angiogenesis
In gastric cancer, COL1A1-positive endothelial cells promote progression via the ANGPTL4-SDC4 axis driven by endothelial-to-mesenchymal transition, directly linking GO:0001938 to tumor malignancy. In colorectal cancer, B7-H3 activates NF-kB to induce VEGFA, enhancing angiogenesis and tumor growth. These studies identify positive regulation of endothelial cell proliferation as a therapeutic target in oncology.
Ischemic injury and muscle regeneration
Endothelial lactate controls muscle regeneration from ischemia by inducing M2-like macrophage polarization, demonstrating that GO:0001938 is essential for recovery after ischemic injury. Impaired endothelial proliferation can therefore contribute to poor regeneration in peripheral artery disease.
Bone regeneration
Lymphatic vessels in bone support regeneration after injury, a process that requires endothelial cell proliferation. This highlights the importance of GO:0001938 in skeletal repair and potential therapies for bone defects.
Cardiac growth and repair
Thrombospondin 1 and Reelin act through Vldlr to regulate cardiac growth and repair, implicating endothelial proliferation in heart disease. Dysregulation of these pathways may contribute to adverse cardiac remodeling.
From positive regulation of endothelial cell proliferation-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X promote endothelial proliferation? | CRISPR knockout in HUVECs followed by proliferation assay |
| Does a specific mutation in gene Y affect angiogenesis? | Point mutation knock-in in endothelial cells |
| Does overexpression of gene Z drive tumor angiogenesis? | Overexpression in colorectal cancer cells |
| Does gene A mediate endothelial-to-mesenchymal transition? | Knockout in gastric cancer endothelial cells |
| Does metabolic gene B regulate endothelial proliferation? | Knockout in pericytes or endothelial cells |
| Does secreted factor C modulate cardiac repair? | Knock-in mouse model |
How to Study the positive regulation of endothelial cell proliferation Process
| Method | What It Measures | Typical Application |
|---|---|---|
| EdU incorporation | DNA synthesis | Quantify endothelial proliferation |
| Tube formation assay | Capillary-like network formation | Assess angiogenesis in vitro |
| Co-immunoprecipitation | Protein-protein interactions | Detect OPN3-VEGFR2 or ZO-1-YB-1 complexes |
| RNA-seq | Transcriptome changes | Identify pathways regulating proliferation |
| Lactate assay | Lactate production/uptake | Study metabolic control of proliferation |
| Glycolysis stress test | Glycolytic capacity | Assess pericyte metabolism |
| Immunofluorescence | Protein localization | Visualize stress granules or junction proteins |
| Matrigel plug assay | In vivo angiogenesis | Evaluate pro-angiogenic factors |
Proliferation assays
EdU or BrdU incorporation, MTT, and colony formation assays are standard to measure endothelial cell proliferation after genetic manipulation. These methods directly quantify the rate of DNA synthesis and cell division, providing functional readouts for GO:0001938.
Angiogenesis assays
Tube formation assays on Matrigel and aortic ring assays assess the ability of endothelial cells to form capillary-like structures, a functional consequence of positive regulation of endothelial cell proliferation. These are complemented by in vivo models such as Matrigel plug assays.
Molecular interaction studies
Co-immunoprecipitation, proximity ligation, and immunofluorescence are used to detect interactions such as OPN3-VEGFR2 or ZO-1-YB-1. These methods reveal the molecular mechanisms underlying GO:0001938.
Transcriptomic and metabolic profiling
RNA-seq and metabolic assays (e.g., lactate measurement, glycolysis stress tests) identify pathways and metabolic dependencies that regulate endothelial proliferation. Such profiling can uncover novel regulators of GO:0001938.
How CRISPR Can Be Used to Study GO:0001938 positive regulation of endothelial cell proliferation
Knockout
CRISPR knockout of candidate genes such as OPN3 or COL1A1 in endothelial cells enables loss-of-function studies to determine whether they are required for positive regulation of endothelial cell proliferation. Knockout models are essential for establishing causality in GO:0001938 research.
Point Mutation
Point mutations can be introduced to mimic disease-associated variants or to disrupt specific phosphorylation sites in regulators of endothelial proliferation. For example, mutating ZO-1 residues involved in YB-1 binding can clarify its role in stress granule formation during angiogenesis.
Knock-in
Knock-in of tagged or reporter alleles allows visualization and tracking of endothelial cells undergoing proliferation in vivo. This approach is valuable for studying GO:0001938 in complex tissues such as bone or heart.
Overexpression
CRISPR activation or cDNA overexpression of pro-angiogenic factors like VEGFA or B7-H3 can drive endothelial proliferation and angiogenesis in models of cancer or ischemia. Overexpression studies help identify sufficiency of a gene for GO:0001938.
How EDITGENE Supports positive regulation of endothelial cell proliferation Research
Researchers studying positive regulation of endothelial cell proliferation-related genes often need to determine whether a candidate gene is causally involved in endothelial cell division or simply correlated with it. EDITGENE provides validated CRISPR tools and services to establish causality through precise genome editing, enabling robust functional studies of GO:0001938.
Contact EDITGENE today to design your custom CRISPR model for positive regulation of endothelial cell proliferation research.
Frequently Asked Questions About positive regulation of endothelial cell proliferation
What is GO:0001938?
GO:0001938 is the Gene Ontology term for positive regulation of endothelial cell proliferation, describing any process that activates or increases the rate of endothelial cell division.
What genes are involved in positive regulation of endothelial cell proliferation?
Key genes include VEGFA, VEGFR2, B7-H3, OPN3, ANGPTL4, SDC4, COL1A1, ZO-1, YB-1, and VLDLR, among others.
How is endothelial cell proliferation regulated?
It is regulated by growth factor signaling (VEGFA/VEGFR2), transcription factors (NF-kB), metabolic cues (lactate, glycolysis), and cell junction proteins (ZO-1).
Why is positive regulation of endothelial cell proliferation important in cancer?
In cancer, excessive endothelial proliferation supports tumor angiogenesis and progression, making it a therapeutic target.
What diseases are associated with GO:0001938?
Cancer, ischemic injury, impaired muscle and bone regeneration, and cardiac disease are associated with dysregulated endothelial proliferation.
How can CRISPR be used to study GO:0001938?
CRISPR knockout, point mutation, knock-in, and overexpression models allow causal testing of candidate genes in endothelial proliferation.
What assays measure endothelial cell proliferation?
EdU/BrdU incorporation, MTT, tube formation, and Matrigel plug assays are commonly used.
What is the role of OPN3 in endothelial proliferation?
OPN3 interacts with VEGFR2 to positively regulate angiogenesis in HUVECs.
How does lactate affect endothelial proliferation?
Endothelial lactate uptake controls muscle regeneration by inducing M2-like macrophage polarization, which supports endothelial proliferation.
What services does EDITGENE offer for GO:0001938 research?
EDITGENE provides CRISPR knockout, point mutation, knock-in, overexpression cell models, library screening, and bioinformatics services.
Conclusion
GO:0001938, positive regulation of endothelial cell proliferation, is a fundamental biological process that drives angiogenesis, tissue repair, and regeneration. Its dysregulation contributes to cancer, ischemic disease, and impaired healing. The cited literature identifies key molecular players such as VEGFA, VEGFR2, B7-H3, OPN3, and metabolic signals that converge on endothelial cell cycle entry. CRISPR-based models are indispensable for establishing causality and for developing targeted therapies. EDITGENE offers comprehensive services to support this research, from knockout and knock-in models to library screening and bioinformatics.
References
- 1. Liu Q et al.. 2025. COL1A1-positive endothelial cells promote gastric cancer progression via the ANGPTL4-SDC4 axis driven by endothelial-to-mesenchymal transition.. Cancer Lett 623:217731 PMID: 40254092
- 2. Zhang J et al.. 2020. Endothelial Lactate Controls Muscle Regeneration from Ischemia by Inducing M2-like Macrophage Polarization.. Cell Metab 31(6):1136-1153.e7 PMID: 32492393
- 3. Biswas L et al.. 2023. Lymphatic vessels in bone support regeneration after injury.. Cell 186(2):382-397.e24 PMID: 36669473
- 4. Meng YM et al.. 2021. Hexokinase 2-driven glycolysis in pericytes activates their contractility leading to tumor blood vessel abnormalities.. Nat Commun 12(1):6011 PMID: 34650057
- 5. Wang R et al.. 2020. B7-H3 promotes colorectal cancer angiogenesis through activating the NF-κB pathway to induce VEGFA expression.. Cell Death Dis 11(1):55 PMID: 31974361
- 6. El Bakkouri Y et al.. 2024. ZO-1 interacts with YB-1 in endothelial cells to regulate stress granule formation during angiogenesis.. Nat Commun 15(1):4405 PMID: 38782923
- 7. Luo H et al.. 2025. OPN3-mediated positive regulation of angiogenesis in HUVECs through VEGFR2 interaction.. Commun Biol 8(1):529 PMID: 40164822
- 8. Pei L et al.. 2024. Thrombospondin 1 and Reelin act through Vldlr to regulate cardiac growth and repair.. Basic Res Cardiol 119(1):169-192 PMID: 38147128
