GO:0032723 positive regulation of connective tissue growth factor production: Regulation, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0032723 describes any biological process that increases the frequency, rate, or extent of production of connective tissue growth factor (CTGF/CCN2), a matricellular protein encoded by the CCN2 gene.
• CTGF/CCN2 production is elevated in fibrotic disorders of the kidney, lung, pancreas, and uterus, where it drives extracellular matrix deposition and tissue remodeling [3,4,6,7].
• Positive regulation of CTGF production occurs through cytokine signaling, mechanical stress, and microRNA-mediated feedback loops, including a miR-21/CTGF positive feedback circuit in pancreatic stellate cells.
• Steroid hormones regulate CTGF synthesis in reproductive tissues, demonstrating endocrine control of this GO term.
• CTGF/CCN2 is a biomarker and potential therapeutic target in chronic pancreatitis, COPD, renal fibrosis, and metastatic tumor microenvironments [2,3,4,6].
• CRISPR-based knockout, knock-in, and overexpression models enable causal dissection of genes that positively regulate CTGF production in human disease contexts [1,2,8].
Description
Connective tissue growth factor (CTGF), also known as CCN2, is a secreted matricellular protein that coordinates cell adhesion, migration, proliferation, and extracellular matrix production [3,6]. The Gene Ontology term GO:0032723, positive regulation of connective tissue growth factor production, captures the upstream biological processes that increase the synthesis or secretion of CTGF/CCN2. This term is distinct from the regulation of CTGF activity; it specifically concerns the frequency, rate, or extent of CTGF production, encompassing transcriptional, post-transcriptional, and secretory control mechanisms [1,8]. Researchers study GO:0032723 because dysregulated CTGF production is a hallmark of fibrotic and inflammatory diseases, including renal fibrosis, chronic pancreatitis, COPD, and tumor-associated stromal remodeling [2,3,4,6]. In human renal fibrosis, CTGF expression is markedly upregulated in mesangial cells and interstitial fibroblasts, correlating with disease progression. Similarly, CTGF promotes pulmonary epithelial cell senescence and is associated with COPD severity, linking this GO term to aging-related lung pathology. In pancreatic inflammation, CTGF/CCN2 and microRNA-21 form a positive feedback loop in pancreatic stellate cells, amplifying fibrotic signaling. Understanding the positive regulation of CTGF production therefore provides mechanistic insight into tissue remodeling and identifies candidate targets for antifibrotic therapy [3,8].
positive regulation of connective tissue growth factor production At A Glance
| GO ID | GO:0032723 |
|---|---|
| GO term | positive regulation of connective tissue growth factor production |
| Ontology | biological_process |
| Synonym | positive regulation of CTGF production; positive regulation of CCN2 production; activation of connective tissue growth factor production; upregulation of connective tissue growth factor production |
| Major function | Increases the frequency, rate, or extent of CTGF/CCN2 synthesis and secretion |
| Related gene | CCN2 (CTGF) |
| Associated diseases | Renal fibrosis, chronic pancreatitis, COPD, metastatic tumor microenvironment |
| Regulatory inputs | Cytokines, steroids, mechanical stress, microRNAs (e.g., miR-21) |
What Is GO:0032723?
GO:0032723 is defined as any process that activates or increases the frequency, rate, or extent of connective tissue growth factor production. In practical terms, it includes signaling events, transcription factor activity, and post-transcriptional mechanisms that elevate the levels of CTGF/CCN2 mRNA or protein [1,8]. The term is a biological process and is synonymous with positive regulation of CCN2 production, positive regulation of CTGF production, and positive regulation of hypertrophic chondrocyte-specific gene product 24 production, among other synonyms.
Why Is positive regulation of connective tissue growth factor production Important in Cell Biology?
GO:0032723 is important because CTGF/CCN2 is a central mediator of fibrosis and tissue remodeling, and its production is dynamically regulated in multiple human diseases [3,4,6,8]. Positive regulation of CTGF production amplifies extracellular matrix deposition, promotes epithelial cell senescence, and supports tumor-associated stromal changes [2,4]. Targeting the upstream regulators of CTGF production may offer therapeutic opportunities in chronic fibrotic and inflammatory conditions [3,8].
• CTGF/CCN2 is overproduced in human renal fibrosis, where it correlates with disease severity.
• Positive regulation of CTGF production in pancreatic stellate cells involves a miR-21/CTGF feedback loop that sustains chronic pancreatitis.
• CTGF promotes pulmonary epithelial cell senescence and is associated with COPD severity.
• Steroid hormones regulate CTGF synthesis in the mouse uterus, linking endocrine signals to this GO term.
• CTGF is expressed in human uterine tissues, indicating roles in reproductive biology.
• In steatotic liver, HAS2-mediated fibrotic tumor microenvironment promotes metastatic tumor growth, a process in which CTGF may contribute to stromal remodeling.
• CTGF/CCN2 is a potential biomarker for fibrotic progression in kidney and lung diseases [4,6].
• Understanding positive regulation of CTGF production can guide antifibrotic drug development [3,8].
• CRISPR screens can identify novel upstream regulators of CTGF production.
• Primary atopic disorders with genomic sequencing may reveal variants in CTGF regulatory pathways.
What Happens During positive regulation of connective tissue growth factor production?
Transcriptional activation of CCN2
In simple terms: Signals turn on the CCN2 gene, making more CTGF mRNA.
Positive regulation of CTGF production begins with transcriptional activation of the CCN2 gene in response to cytokines, growth factors, and mechanical stress [3,6]. In pancreatic stellate cells, inflammatory stimuli increase CCN2 promoter activity, leading to elevated CTGF mRNA levels. Similarly, in renal fibrosis, CTGF mRNA is upregulated in mesangial cells and fibroblasts.
Post-transcriptional stabilization by microRNAs
In simple terms: MicroRNAs can stabilize CTGF mRNA, increasing protein output.
MicroRNA-21 and CTGF form a positive feedback loop in pancreatic stellate cells, where miR-21 enhances CTGF production and CTGF reciprocally increases miR-21, amplifying fibrotic signaling. This post-transcriptional mechanism is a key component of GO:0032723 in chronic pancreatitis.
Hormonal and endocrine control
In simple terms: Steroid hormones can increase CTGF production in reproductive tissues.
Steroidal regulation of CTGF synthesis has been demonstrated in the mouse uterus, where estrogen and progesterone modulate CCN2 expression. In human uterine tissues, CTGF is localized to specific cell types, suggesting endocrine-regulated production.
Secretion and extracellular matrix deposition
In simple terms: Once made, CTGF is secreted to act on surrounding cells and matrix.
After synthesis, CTGF/CCN2 is secreted into the extracellular space, where it binds to matrix components and cell surface receptors, promoting fibrosis and tissue remodeling [3,6]. In pancreatic stellate cells, CTGF is exported in exosomes, extending its paracrine effects.
Senescence-associated CTGF production
In simple terms: Aging lung cells produce more CTGF, contributing to COPD.
CTGF promotes pulmonary epithelial cell senescence, and its production is increased in COPD, linking GO:0032723 to aging-related lung pathology.
Key Genes Involved in GO:0032723 positive regulation of connective tissue growth factor production
The following genes and proteins are experimentally implicated in the positive regulation of connective tissue growth factor production, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| CCN2 (CTGF) | Encodes connective tissue growth factor; target of positive regulation | Central to fibrosis, biomarker studies [3,6] |
| MIR21 | MicroRNA-21; forms positive feedback loop with CTGF | Pancreatic stellate cell activation |
| HAS2 | Hyaluronan synthase 2; promotes fibrotic tumor microenvironment | Metastatic tumor growth in steatotic liver |
| ESR1 | Estrogen receptor 1; mediates steroid regulation of CTGF | Uterine CTGF synthesis |
| PGR | Progesterone receptor; modulates CTGF production | Mouse uterus steroid regulation |
| SMAD3 | TGF-beta signaling effector; activates CCN2 transcription | Renal fibrosis |
| TGFB1 | Transforming growth factor beta 1; induces CTGF production | Pancreatic inflammation |
| IL6 | Interleukin 6; inflammatory cytokine inducing CTGF | Chronic pancreatitis |
| TNF | Tumor necrosis factor; modulates CTGF expression | Inflammatory signaling |
| STAT3 | Signal transducer; downstream of IL6, may regulate CTGF | Pancreatic stellate cells |
| NFKB1 | Nuclear factor kappa B; inflammatory regulator of CTGF | Pancreatic inflammation |
| SP1 | Transcription factor; binds CCN2 promoter | Basal and induced CTGF transcription |
| AP1 | Activator protein 1; mediates mechanical stress induction | Fibrotic remodeling |
| YAP1 | Hippo pathway effector; mechanotransduction regulator | Tissue stiffness-induced CTGF |
| WWTR1 | TAZ; co-activator with YAP1 in CTGF induction | Fibrotic signaling |
| CTNNB1 | Beta-catenin; Wnt pathway regulator of CTGF | Renal fibrosis |
| VEGFA | Vascular endothelial growth factor; may indirectly increase CTGF | Tumor microenvironment |
How Is positive regulation of connective tissue growth factor production Regulated?
Positive regulation of CTGF production is controlled by a network of signaling pathways, including TGF-beta/SMAD, Wnt/beta-catenin, and Hippo/YAP-TAZ, which converge on the CCN2 promoter. In pancreatic stellate cells, a miR-21/CTGF positive feedback loop sustains CTGF production during chronic pancreatitis. Steroid hormones regulate CTGF synthesis in the mouse uterus, demonstrating endocrine control. Inflammatory cytokines such as IL-6 and TNF can also upregulate CTGF in pancreatic inflammation. These regulatory inputs collectively determine the frequency and extent of CTGF production in different tissues [3,5,6,8].
positive regulation of connective tissue growth factor production and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CCN2 | Renal fibrosis | Knockout or overexpression in human renal mesangial cells |
| MIR21 | Chronic pancreatitis | miR-21 knockout in pancreatic stellate cells |
| HAS2 | Metastatic tumor growth in steatotic liver | HAS2 knockout in hepatocytes or tumor cells |
| CCN2 | COPD | Overexpression in pulmonary epithelial cells |
| ESR1/PGR | Uterine CTGF regulation | Steroid-treated mouse uterus models |
Renal fibrosis
CTGF expression is markedly increased in human renal fibrosis, where it correlates with extracellular matrix accumulation and disease progression. Positive regulation of CTGF production in mesangial cells and interstitial fibroblasts contributes to glomerulosclerosis and tubulointerstitial fibrosis.
Chronic pancreatitis
In chronic pancreatitis, CTGF/CCN2 and microRNA-21 form a positive feedback loop in pancreatic stellate cells, amplifying fibrotic signaling and inflammation. CTGF is also exported in exosomes, extending its effects to neighboring cells.
COPD and lung senescence
CTGF promotes pulmonary epithelial cell senescence and is associated with COPD severity, linking positive regulation of CTGF production to aging-related lung disease.
Metastatic tumor microenvironment
In steatotic liver, HAS2-mediated fibrotic tumor microenvironment promotes metastatic tumor growth, a process in which CTGF may contribute to stromal remodeling and tumor progression.
From positive regulation of connective tissue growth factor production-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does CCN2 knockout reduce fibrosis? | CCN2 knockout in renal fibroblasts or pancreatic stellate cells |
| Does miR-21 point mutation disrupt CTGF feedback? | Point mutation of miR-21 binding site in CCN2 3'UTR |
| Does a risk variant increase CTGF production? | Knock-in of SNP in CCN2 promoter or enhancer |
| Where is CTGF produced in tissue? | Tagged knock-in of CCN2 with fluorescent reporter |
| Does overexpression of TGFB1 increase CTGF? | Overexpression of TGFB1 in epithelial cells |
| Which genes regulate CTGF production? | CRISPR library screening in fibrotic cell models |
How to Study the positive regulation of connective tissue growth factor production Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | CCN2 mRNA levels | Transcriptional regulation studies |
| ELISA | Secreted CTGF protein | Quantification in cell culture supernatants |
| Western blot | Intracellular CTGF protein | Validation of production changes |
| Reporter assay | CCN2 promoter activity | High-throughput screening |
| CRISPR knockout screen | Gene requirement for CTGF production | Discovery of novel regulators |
| CRISPR activation screen | Gene sufficiency to increase CTGF | Pathway identification |
| Immunohistochemistry | Tissue localization of CTGF | Clinical specimen analysis |
RNA-seq and transcriptomics
RNA sequencing can quantify CCN2 mRNA levels and identify transcriptional changes that positively regulate CTGF production in disease models [3,6].
Proteomics and ELISA
Proteomic analysis and ELISA measure secreted CTGF protein, providing direct evidence of increased production [3,8].
Imaging and reporter assays
Fluorescent reporter knock-in models allow visualization of CTGF production in live cells and tissues.
CRISPR screening
Genome-wide CRISPR knockout or activation screens can identify novel positive regulators of CTGF production.
How CRISPR Can Be Used to Study GO:0032723 positive regulation of connective tissue growth factor production
Knockout
CRISPR knockout of candidate genes such as CCN2, MIR21, or HAS2 can determine whether they are required for positive regulation of CTGF production in disease models [1,2,8].
Point Mutation
Point mutations can be introduced into the CCN2 promoter or microRNA binding sites to test their role in CTGF production.
Knock-in
Knock-in of fluorescent tags or risk variants allows tracking of CTGF production and functional analysis of regulatory elements.
Overexpression
CRISPR activation or cDNA overexpression can increase CTGF production to study downstream fibrotic effects [1,2].
How EDITGENE Supports positive regulation of connective tissue growth factor production Research
Researchers studying positive regulation of connective tissue growth factor production-related genes often need to determine whether a candidate gene is causally involved in CTGF synthesis, secretion, or signaling. EDITGENE provides CRISPR-based cell model services to enable such causal experiments.
Contact EDITGENE today to design your custom CRISPR model for positive regulation of connective tissue growth factor production research.
Frequently Asked Questions About positive regulation of connective tissue growth factor production
What is GO:0032723?
GO:0032723 is the Gene Ontology term for positive regulation of connective tissue growth factor production, describing processes that increase the frequency, rate, or extent of CTGF/CCN2 synthesis.
What genes are involved in positive regulation of connective tissue growth factor production?
Key genes include CCN2 (CTGF), MIR21, HAS2, TGFB1, SMAD3, and steroid receptors ESR1 and PGR [3,5,6,8].
What diseases are associated with increased CTGF production?
Renal fibrosis, chronic pancreatitis, COPD, and metastatic tumor microenvironments are associated with increased CTGF production [2,3,4,6].
How is CTGF production regulated?
CTGF production is regulated by TGF-beta/SMAD, Wnt/beta-catenin, Hippo/YAP-TAZ pathways, microRNAs such as miR-21, and steroid hormones [5,6,8].
What is the role of miR-21 in CTGF production?
miR-21 and CTGF form a positive feedback loop in pancreatic stellate cells, amplifying CTGF production during chronic pancreatitis.
Can CRISPR be used to study CTGF production?
Yes, CRISPR knockout, knock-in, point mutation, and overexpression models can dissect genes that regulate CTGF production [1,2].
What cell models are used to study CTGF production?
Pancreatic stellate cells, renal mesangial cells, pulmonary epithelial cells, and hepatocytes are commonly used [3,4,6,8].
Is CTGF a biomarker for fibrosis?
CTGF expression correlates with renal fibrosis and COPD severity, suggesting it may serve as a biomarker [4,6].
What is the difference between CTGF and CCN2?
CTGF and CCN2 refer to the same protein, encoded by the CCN2 gene.
How does steroid hormone regulate CTGF?
Steroid hormones such as estrogen and progesterone regulate CTGF synthesis in the mouse uterus.
Conclusion
GO:0032723, positive regulation of connective tissue growth factor production, is a critical biological process in fibrosis, inflammation, and tissue remodeling. CTGF/CCN2 production is increased by cytokines, microRNAs, and steroid hormones, contributing to diseases such as renal fibrosis, chronic pancreatitis, and COPD [3,4,5,6,8]. CRISPR-based models offer powerful tools to identify and validate the upstream regulators of this process, accelerating the development of targeted therapies [1,2].
References
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- 2. Yang YM et al.. 2025. Metastatic tumor growth in steatotic liver is promoted by HAS2-mediated fibrotic tumor microenvironment.. J Clin Invest 135(7) PMID: 39946200
- 3. Charrier A et al.. 2014. Regulation of pancreatic inflammation by connective tissue growth factor (CTGF/CCN2).. Immunology 141(4):564-76 PMID: 24754049
- 4. Jang JH et al.. 2017. Connective Tissue Growth Factor Promotes Pulmonary Epithelial Cell Senescence and Is Associated with COPD Severity.. COPD 14(2):228-237 PMID: 28026993
- 5. Rageh MA et al.. 2001. Steroidal regulation of connective tissue growth factor (CCN2; CTGF) synthesis in the mouse uterus.. Mol Pathol 54(5):338-46 PMID: 11577177
- 6. Ito Y et al.. 1998. Expression of connective tissue growth factor in human renal fibrosis.. Kidney Int 53(4):853-61 PMID: 9551391
- 7. Uzumcu M et al.. 2000. Localization of connective tissue growth factor in human uterine tissues.. Mol Hum Reprod 6(12):1093-8 PMID: 11101692
- 8. Charrier A et al.. 2014. Connective tissue growth factor (CCN2) and microRNA-21 are components of a positive feedback loop in pancreatic stellate cells (PSC) during chronic pancreatitis and are exported in PSC-derived exosomes.. J Cell Commun Signal 8(2):147-56 PMID: 24464300
