GO:2000793 cell proliferation involved in heart valve development: Valve Morphogenesis, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:2000793 describes any cell proliferation that is involved in heart valve development, a biological process essential for forming the endocardial cushions and mature valve leaflets.
• Proliferation of endocardial, mesenchymal, and myocardial cells must be tightly balanced with apoptosis and differentiation to sculpt functional valves.
• Canonical Wnt signaling and Slit-Robo signaling are key regulators of cell proliferation during heart valve development.
• Disruption of valve cell proliferation contributes to congenital valve defects and adult valve disease such as aortic valve stenosis.
• Angiopoietin-like 2 and periostin are examples of secreted factors that influence valve cell behavior and proliferation.
• CRISPR-based knockout, knock-in, and overexpression models enable causal testing of genes in GO:2000793 in vitro and in vivo.
Description
Heart valve development is a precisely orchestrated process that transforms simple endocardial cushions into mature, stratified valve leaflets capable of withstanding lifelong hemodynamic stress. Central to this transformation is cell proliferation involved in heart valve development (GO:2000793), defined as any cell proliferation that is involved in heart valve development. This process supplies the progenitor cells and tissue mass required for cushion expansion, valve elongation, and remodeling. Perturbations in the timing or extent of proliferation can lead to congenital valve malformations and contribute to adult valve disease. Understanding GO:2000793 is therefore critical for developmental biologists, cardiologists, and researchers modeling valve disease. The term encompasses proliferation of multiple cell types, including endocardial cells, valve interstitial cells, and myocardial cells, and is regulated by conserved signaling pathways such as Wnt and Slit-Robo. This article synthesizes authoritative QuickGO annotation and verified PubMed literature to provide a research-grade overview of GO:2000793, its molecular regulators, disease relevance, and experimental strategies for study.
cell proliferation involved in heart valve development At A Glance
| GO ID | GO:2000793 |
|---|---|
| GO term | cell proliferation involved in heart valve development |
| Ontology | biological_process |
| Synonym | cell proliferation of cardiac valve development; cell proliferation of heart valve development |
| Definition | Any cell proliferation that is involved in heart valve development. |
| Major function | Supplies cells for endocardial cushion expansion, valve leaflet elongation, and remodeling during heart development. |
| Related processes | Heart valve development, endocardial cushion formation, epithelial-to-mesenchymal transition, apoptosis. |
| Key regulators | Canonical Wnt signaling, Slit-Robo signaling, Angiopoietin-like 2, Periostin. |
| Disease relevance | Congenital heart valve defects, aortic valve stenosis, valve calcification. |
What Is GO:2000793?
GO:2000793, cell proliferation involved in heart valve development, is a biological process defined as any cell proliferation that is involved in heart valve development. It includes the division of cells that contribute to the formation, growth, and remodeling of heart valve structures, such as endocardial cushion cells and valve interstitial cells. The term is a child of cell proliferation and is part of the broader heart valve development program. Synonyms include cell proliferation of cardiac valve development and cell proliferation of heart valve development.
Why Is cell proliferation involved in heart valve development Important in Cell Biology?
Cell proliferation involved in heart valve development is essential for building valves with the correct size, shape, and cellularity to function for a lifetime. Because proliferation must be balanced with apoptosis and differentiation, even subtle perturbations can cause valve malformations or predispose to degenerative valve disease. Studying GO:2000793 helps researchers identify the signaling pathways and genes that control valve cell number and behavior, offering targets for regenerative medicine and diagnostics.
• Provides the cellular mass required for endocardial cushion formation and valve leaflet growth.
• Balances with apoptosis to sculpt valve structures and remove excess tissue.
• Is regulated by canonical Wnt signaling, which controls proliferation of valve progenitor cells.
• Is influenced by Slit-Robo signaling, which guides cell behavior in the developing heart.
• Dysregulation can lead to congenital valve defects such as bicuspid aortic valve.
• Contributes to adult valve disease, including aortic valve stenosis and calcification.
• Serves as a model for studying proliferation control in a mechanically active tissue.
• Offers targets for cell-based therapies to regenerate damaged valves.
• Can be studied using CRISPR screens to identify novel regulators.
• Links developmental biology to translational cardiology.
What Happens During cell proliferation involved in heart valve development?
Initiation of proliferation in endocardial cushions
In simple terms: Cells in the early valve cushions start dividing to make the cushion bigger.
During early heart valve development, endocardial cells undergo epithelial-to-mesenchymal transition and invade the cardiac jelly to form endocardial cushions. These mesenchymal cells then proliferate to expand the cushion, providing the raw material for future valve leaflets. Proliferation in this phase is driven by signals from the myocardium and is essential for establishing adequate valve primordia. Disruption of this initial proliferative burst can result in hypoplastic valves.
Regulation by canonical Wnt signaling
In simple terms: A well-known signaling pathway called Wnt helps control how much valve cells divide.
The canonical Wnt signaling pathway plays a critical role in heart valve development by regulating cell proliferation. Activation of Wnt signaling promotes proliferation of endocardial and mesenchymal cells in the cushions, while its inhibition reduces proliferation and impairs valve formation. This pathway coordinates proliferation with other processes such as differentiation and apoptosis to ensure proper valve morphogenesis.
Role of Slit-Robo signaling
In simple terms: Another signaling system, Slit-Robo, helps guide cell movements and division in the developing heart.
Slit-Robo signaling is involved in heart development, including valve formation. Although its direct role in valve cell proliferation is still being elucidated, Slit-Robo signaling influences cell behavior in the developing heart and may modulate proliferation of valve progenitor cells. This pathway interacts with other signaling networks to coordinate tissue morphogenesis.
Balance with apoptosis and differentiation
In simple terms: For valves to form correctly, some cells must stop dividing and even die, while others specialize.
Apoptosis occurs during cardiovascular development and is crucial for remodeling heart valves. After initial proliferation expands the cushions, programmed cell death removes excess cells to sculpt the valve leaflets. This balance between proliferation and apoptosis is tightly regulated; too much proliferation or too little apoptosis can lead to thickened valves, while the opposite can cause thin, fragile valves.
Contribution of secreted factors
In simple terms: Proteins released by cells, like Angiopoietin-like 2 and Periostin, influence valve cell growth.
Secreted factors such as Angiopoietin-like 2 (ANGPTL2) and Periostin (POSTN) modulate valve development. ANGPTL2 is essential for aortic valve development in mice, and its loss leads to valve defects. Periostin plays distinct roles in cardiovascular development and disease, influencing cell proliferation and matrix remodeling. These factors can act on valve interstitial cells to regulate proliferation and differentiation.
Key Genes Involved in GO:2000793 cell proliferation involved in heart valve development
The following genes and proteins have been implicated in cell proliferation involved in heart valve development or related valve morphogenesis processes.
| Gene | Major Role | Research Relevance |
|---|---|---|
| WNT3A | Activates canonical Wnt signaling | Promotes proliferation of valve progenitor cells |
| CTNNB1 | Core mediator of canonical Wnt signaling | Essential for Wnt-dependent proliferation in valve development |
| SLIT2 | Ligand for Robo receptors | Influences heart development including valve formation |
| ROBO1 | Receptor for Slit ligands | Mediates Slit signaling in cardiovascular development |
| ANGPTL2 | Secreted angiopoietin-like protein | Essential for aortic valve development in mice |
| POSTN | Extracellular matrix protein | Regulates valve cell behavior and matrix remodeling |
| VEGFA | Angiogenic growth factor | May influence valve cell proliferation via angiogenesis |
| NOTCH1 | Signaling receptor | Mutations cause aortic valve disease; regulates proliferation |
| BMP2 | Growth factor | Induces endocardial cushion formation and proliferation |
| TGFB1 | Growth factor | Regulates valve interstitial cell proliferation and differentiation |
| NFATC1 | Transcription factor | Controls valve development and remodeling |
| GATA4 | Transcription factor | Mutations linked to congenital heart valve defects |
| TBX20 | Transcription factor | Regulates valve development and proliferation |
| HAS2 | Hyaluronan synthase | Required for endocardial cushion expansion |
| SOX9 | Transcription factor | Involved in valve progenitor proliferation and differentiation |
| MEF2C | Transcription factor | Regulates myocardial and valve development |
How Is cell proliferation involved in heart valve development Regulated?
Cell proliferation involved in heart valve development is regulated by a network of signaling pathways and transcription factors. Canonical Wnt signaling promotes proliferation of valve progenitor cells, and its activity is tightly controlled by secreted antagonists and intracellular feedback loops. Slit-Robo signaling modulates cell behavior in the developing heart and may intersect with proliferation pathways. Secreted factors such as ANGPTL2 and Periostin influence valve cell proliferation and matrix remodeling. Additionally, apoptosis is coordinated with proliferation to ensure proper valve sculpting. The balance between these processes is critical; dysregulation can lead to valve malformations or disease.
cell proliferation involved in heart valve development and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| NOTCH1 | Bicuspid aortic valve, valve calcification | Knockout mouse, valve interstitial cell culture |
| ANGPTL2 | Aortic valve stenosis | Angptl2 knockout mouse |
| POSTN | Valve fibrosis, remodeling | Postn knockout mouse, overexpression in valve cells |
| CTNNB1 | Congenital valve defects | Conditional knockout in endocardial cells |
| VEGFA | Valve angiogenesis, proliferation | Vegfa overexpression/knockout models |
Congenital heart valve defects
Disruptions in cell proliferation during heart valve development can cause congenital valve malformations, including bicuspid aortic valve and valve stenosis. Mutations in genes such as NOTCH1 and GATA4 have been linked to valve defects, and impaired proliferation of valve progenitor cells contributes to these phenotypes. Understanding GO:2000793 helps identify the developmental origins of congenital valve disease.
Aortic valve stenosis and calcification
Adult aortic valve stenosis is characterized by thickening and calcification of valve leaflets, often preceded by abnormal cell proliferation and differentiation of valve interstitial cells. ANGPTL2 deficiency in mice leads to aortic valve defects, highlighting the importance of secreted factors in valve homeostasis. Targeting proliferation pathways may offer therapeutic strategies for valve disease.
Valve disease in metabolic disorders
Diabetes and other metabolic disorders can exacerbate valve disease, partly through effects on cell proliferation and inflammation. Impaired lymphangiogenesis in pericoronary adipose tissue correlates with diabetes-aggravated coronary atherosclerosis, suggesting that metabolic stress impacts cardiovascular cell proliferation. Valve cells may be similarly affected, linking GO:2000793 to systemic disease.
From cell proliferation involved in heart valve development-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is gene X required for valve cell proliferation? | CRISPR knockout in endocardial/mesenchymal cells |
| Does a point mutation in gene Y affect proliferation? | CRISPR point mutation knock-in in valve cells |
| Can overexpression of gene Z drive proliferation? | CRISPR overexpression (CRISPRa) in valve cells |
| Where is protein X expressed during valve development? | Tagged knock-in (e.g., GFP) in mouse |
| What genes regulate proliferation in valve development? | CRISPR library screening in valve progenitor cells |
| How does gene W affect valve morphogenesis in vivo? | Conditional knockout mouse models |
How to Study the cell proliferation involved in heart valve development Process
| Method | What It Measures | Typical Application |
|---|---|---|
| EdU/BrdU incorporation | DNA synthesis (proliferation) | Quantify valve cell proliferation in vivo |
| Ki67 staining | Proliferating cells | Assess proliferation in valve tissue sections |
| Single-cell RNA-seq | Gene expression at single-cell level | Identify proliferating valve cell populations |
| CRISPR knockout screen | Gene function loss | Discover regulators of valve cell proliferation |
| CRISPR activation screen | Gene overexpression | Identify drivers of proliferation |
| Lineage tracing | Cell fate mapping | Track proliferating valve progenitors |
| Immunofluorescence | Protein localization | Visualize signaling proteins in valves |
| Mouse genetics | In vivo gene function | Model valve development and disease |
Lineage tracing and proliferation assays
Lineage tracing using Cre-lox systems in mice allows researchers to follow the fate of proliferating valve cells. Proliferation can be quantified by EdU or BrdU incorporation, Ki67 staining, or phospho-histone H3 immunostaining in developing valves. These methods reveal the spatial and temporal patterns of cell division during valve development.
Transcriptomics and single-cell RNA sequencing
RNA sequencing and single-cell RNA-seq can identify genes and pathways active in proliferating valve cells. Comparing proliferating versus non-proliferating cells reveals candidate regulators of GO:2000793. This approach has been used to dissect Wnt signaling components in valve development.
CRISPR screening and functional genomics
CRISPR knockout or activation screens in valve progenitor cells can systematically identify genes that regulate proliferation. Libraries targeting signaling pathways such as Wnt and Slit-Robo can uncover novel modulators of valve cell proliferation. Hits can be validated in vivo using mouse models.
Imaging and histology
Confocal microscopy and histology of developing hearts allow visualization of valve structures and proliferating cells. Immunofluorescence for markers such as Nfatc1, Sox9, and phospho-histone H3 highlights valve cell populations and proliferation. These techniques are essential for phenotyping CRISPR models.
How CRISPR Can Be Used to Study GO:2000793 cell proliferation involved in heart valve development
Knockout
CRISPR knockout of candidate genes in valve progenitor cells or mouse models can test their requirement for cell proliferation involved in heart valve development. For example, knocking out Ctnnb1 in endocardial cells disrupts Wnt signaling and reduces proliferation. Knockout models help establish causality between a gene and GO:2000793.
Point Mutation
CRISPR point mutation knock-in can model specific human variants associated with valve disease. For instance, introducing a NOTCH1 mutation found in bicuspid aortic valve patients into cells or mice allows study of its effect on proliferation. This approach reveals how subtle genetic changes impact GO:2000793.
Knock-in
Tagged knock-in of fluorescent reporters (e.g., GFP) into genes expressed in valve cells enables lineage tracing and live imaging of proliferating cells. Knock-in of Cre recombinase under valve-specific promoters allows conditional manipulation of genes in GO:2000793.
Overexpression
CRISPR activation (CRISPRa) or transgenic overexpression can drive candidate genes to test whether they are sufficient to enhance valve cell proliferation. Overexpressing Wnt ligands or ANGPTL2 may increase proliferation and alter valve morphology. Overexpression models complement loss-of-function studies.
How EDITGENE Supports cell proliferation involved in heart valve development Research
Researchers studying cell proliferation involved in heart valve development-related genes often need to determine whether a candidate gene is causally involved in valve cell proliferation, and to dissect the precise genetic variants that contribute to disease. EDITGENE provides end-to-end CRISPR services to accelerate this research.
Contact EDITGENE today to design your custom CRISPR model for cell proliferation involved in heart valve development research.
Frequently Asked Questions About cell proliferation involved in heart valve development
What is GO:2000793?
GO:2000793 is the Gene Ontology term for cell proliferation involved in heart valve development, defined as any cell proliferation that is involved in heart valve development.
What genes are involved in cell proliferation involved in heart valve development?
Key genes include WNT3A, CTNNB1, SLIT2, ROBO1, ANGPTL2, POSTN, NOTCH1, BMP2, and TGFB1, among others.
How is cell proliferation regulated during heart valve development?
It is regulated by signaling pathways such as canonical Wnt and Slit-Robo, as well as secreted factors like ANGPTL2 and Periostin.
Why is cell proliferation important for heart valve development?
Proliferation provides the cells needed to expand endocardial cushions and form valve leaflets; imbalances can cause congenital valve defects.
What diseases are associated with defects in heart valve cell proliferation?
Congenital valve malformations, bicuspid aortic valve, and aortic valve stenosis are associated with disrupted proliferation.
How can CRISPR be used to study GO:2000793?
CRISPR knockout, knock-in, point mutation, and overexpression models allow causal testing of genes in valve cell proliferation.
What model organisms are used to study heart valve cell proliferation?
Mice are commonly used, with techniques like lineage tracing and conditional knockouts.
What methods measure cell proliferation in heart valves?
EdU/BrdU incorporation, Ki67 staining, and phospho-histone H3 immunostaining are standard methods.
What is the role of Wnt signaling in heart valve development?
Canonical Wnt signaling promotes proliferation of valve progenitor cells and is essential for valve morphogenesis.
How does ANGPTL2 affect heart valve development?
ANGPTL2 is essential for aortic valve development in mice; its loss leads to valve defects.
Conclusion
GO:2000793, cell proliferation involved in heart valve development, is a fundamental biological process that underpins the formation of functional heart valves. Its regulation by Wnt, Slit-Robo, and secreted factors such as ANGPTL2 and Periostin highlights the complexity of valve morphogenesis. Disruption of this process contributes to congenital and adult valve diseases, making it a critical area of research. Advances in CRISPR-based models and screening technologies now enable precise interrogation of the genes and pathways controlling valve cell proliferation, offering hope for new therapeutic strategies.
References
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- 2. Zhang RR et al.. 2015. [Role of the canonical Wnt signaling pathway in heart valve development].. Zhongguo Dang Dai Er Ke Za Zhi 17(7):757-62 PMID: 26182289
- 3. Fisher SA et al.. 2000. Apoptosis during cardiovascular development.. Circ Res 87(10):856-64 PMID: 11073880
- 4. Zheng P et al.. 2026. Impaired lymphangiogenesis in pericoronary adipose tissue correlates with diabetes-aggravated coronary atherosclerosis.. Cardiovasc Diabetol 25(1):57 PMID: 41580761
- 6. Miquerol L et al.. 2013. Organogenesis of the vertebrate heart.. Wiley Interdiscip Rev Dev Biol 2(1):17-29 PMID: 23799628
- 7. Landry NM et al.. 2018. Periostin in cardiovascular disease and development: a tale of two distinct roles.. Basic Res Cardiol 113(1):1 PMID: 29101484
- 8. Labbé P et al.. 2022. Angiopoietin-like 2 is essential to aortic valve development in mice.. Commun Biol 5(1):1277 PMID: 36414704
