GO:0071657 positive regulation of granulocyte colony-stimulating factor production: Signaling Pathway, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0071657 describes any process that activates or increases the frequency, rate, or extent of production of granulocyte colony-stimulating factor (G-CSF, also known as CSF3).
• G-CSF is a key cytokine that drives granulopoiesis, neutrophil mobilization, and myeloid cell development, and its production is tightly regulated at transcriptional and post-transcriptional levels.
• Positive regulation of G-CSF production is critical in host defense, inflammation, and tissue repair, and its dysregulation is linked to diseases such as hidradenitis suppurativa and myocardial ischemia/reperfusion injury.
• Key transcription factors and signaling pathways, including AML1/PEBP2 and inflammatory mediators, control G-CSF gene expression in activated macrophages and other cell types.
• Experimental models for studying this process include knockout, point-mutation, knock-in, and overexpression cell lines, as well as CRISPR library screening and bioinformatics approaches.
• Understanding GO:0071657 provides insights into cytokine networks, immune cell crosstalk, and potential therapeutic targets for inflammatory and hematopoietic disorders.
Description
Granulocyte colony-stimulating factor (G-CSF), encoded by the CSF3 gene, is a pleiotropic cytokine that regulates the production, differentiation, and function of neutrophils and other myeloid cells. The biological process termed positive regulation of granulocyte colony-stimulating factor production (GO:0071657) encompasses all molecular events that enhance the synthesis and secretion of G-CSF in response to physiological or pathological stimuli. This process is essential for maintaining hematopoietic homeostasis and mounting effective immune responses. Dysregulated G-CSF production contributes to the pathogenesis of various inflammatory and autoimmune conditions, such as hidradenitis suppurativa, where elevated G-CSF pathway activity is observed. Additionally, G-CSF plays a role in myocardial ischemia/reperfusion injury by influencing macrophage polarization and neutrophil infiltration. Therefore, dissecting the mechanisms that positively regulate G-CSF production is crucial for understanding immune regulation and developing targeted therapies.
positive regulation of granulocyte colony-stimulating factor production At A Glance
| GO ID | GO:0071657 |
|---|---|
| GO term | positive regulation of granulocyte colony-stimulating factor production |
| Ontology | biological_process |
| Synonym | positive regulation of CSF3 production; positive regulation of G-CSF production; positive regulation of filgrastim production; positive regulation of lenograstim production; positive regulation of pluripoietin production |
| Major function | Upregulation of G-CSF cytokine synthesis and secretion, leading to enhanced granulopoiesis and neutrophil function |
| Related genes | CSF3, AML1 (RUNX1), PEBP2, IL6, and other inflammatory mediators |
| Associated diseases | Hidradenitis suppurativa, myocardial ischemia/reperfusion injury, inflammatory disorders |
| Research methods | CRISPR knockout/knock-in, overexpression, RNA-seq, proteomics, cytokine assays |
What Is GO:0071657?
GO:0071657, positive regulation of granulocyte colony-stimulating factor production, is defined as any process that activates or increases the frequency, rate, or extent of the production of granulocyte colony-stimulating factor (G-CSF). This includes transcriptional activation of the CSF3 gene, enhanced mRNA stability, increased translation, and augmented secretion of the mature protein. The term is a biological process and is synonymous with positive regulation of CSF3 production, G-CSF production, and filgrastim production, among others.
Why Is positive regulation of granulocyte colony-stimulating factor production Important in Cell Biology?
Positive regulation of G-CSF production is vital for coordinating emergency granulopoiesis during infection and inflammation, and for maintaining steady-state neutrophil levels. G-CSF also modulates adaptive immune responses and tissue repair, making its regulation a central node in immune homeostasis. Aberrant G-CSF production is implicated in chronic inflammatory diseases such as hidradenitis suppurativa, where G-CSF pathway components are elevated. Moreover, G-CSF influences the outcome of myocardial ischemia/reperfusion injury by affecting macrophage polarization and neutrophil infiltration. Thus, understanding how G-CSF production is positively regulated offers opportunities for therapeutic intervention in inflammatory, infectious, and cardiovascular diseases.
• Drives emergency granulopoiesis and neutrophil mobilization during infection.
• Modulates macrophage function and cytokine production, including IL-6 and interferon-gamma receptor expression.
• Plays a role in myocardial ischemia/reperfusion injury by regulating macrophage polarization and neutrophil infiltration.
• Is implicated in the pathogenesis of hidradenitis suppurativa, where G-CSF pathway activity is elevated.
• Influences adaptive immunogenesis through crosstalk with GM-CSF and other cytokines.
• Affects erythropoiesis, with differential effects compared to erythropoietin.
• Contributes to intestinal inflammation by modulating IL-22+ innate lymphoid cells.
• Serves as a target for therapeutic modulation in neutropenia and stem cell mobilization.
• Provides a model for studying transcriptional regulation by AML1/PEBP2 and other factors.
• Is essential for normal myeloid cell development and blood cell homeostasis.
What Happens During positive regulation of granulocyte colony-stimulating factor production?
Transcriptional activation of the CSF3 gene
In simple terms: The cell receives a signal to make more G-CSF, so it turns on the gene that codes for G-CSF.
Positive regulation of G-CSF production often begins with transcriptional activation of the CSF3 gene in response to inflammatory cytokines, pathogen-associated molecular patterns, or other stimuli. Transcription factors such as AML1 (RUNX1) and its partner PEBP2 bind to the CSF3 promoter and enhance its activity. This leads to increased synthesis of G-CSF mRNA and subsequent protein production.
Post-transcriptional stabilization of G-CSF mRNA
In simple terms: After the gene is turned on, the mRNA message is protected from degradation so more protein can be made.
Following transcription, the stability of G-CSF mRNA can be modulated by RNA-binding proteins and microRNAs. Inflammatory signals may stabilize the transcript, allowing for sustained production of G-CSF protein. This step ensures that the cytokine is produced in sufficient quantities to exert its biological effects.
Translational enhancement and secretion
In simple terms: The mRNA is translated into protein, which is then packaged and released from the cell.
Enhanced translation of G-CSF mRNA and efficient secretion of the mature protein are critical for increasing extracellular G-CSF levels. G-CSF is a secreted glycoprotein that acts on target cells expressing the G-CSF receptor (CSF3R). Positive regulation thus encompasses all steps from gene activation to secretion.
Feedback and crosstalk with other cytokines
In simple terms: The process is fine-tuned by other signals, including other cytokines like GM-CSF and IL-6.
G-CSF production is influenced by crosstalk with other cytokines. For example, GM-CSF can modulate adaptive immunogenesis, and G-CSF itself can downregulate interferon-gamma receptor expression and stimulate interleukin-6 production in activated human macrophages. These interactions form a network that ensures appropriate G-CSF levels during immune responses.
Key Genes Involved in GO:0071657 positive regulation of granulocyte colony-stimulating factor production
The following genes and proteins are involved in the positive regulation of granulocyte colony-stimulating factor production, based on published literature.
| Gene | Major Role | Research Relevance |
|---|---|---|
| CSF3 | Encodes granulocyte colony-stimulating factor (G-CSF) | Central to the process; target for knockout and overexpression studies |
| CSF3R | G-CSF receptor; mediates signaling | Determines responsiveness to G-CSF; knockout models |
| RUNX1 (AML1) | Transcription factor that activates CSF3 promoter | Key regulator of G-CSF transcription; point mutations affect binding |
| PEBP2 | Partner of AML1 in transcription complex | Co-regulates CSF3 promoter activity |
| IL6 | Pro-inflammatory cytokine; induced by G-CSF in macrophages | Feedback regulation; knockout and knock-in models |
| IFNGR1 | Interferon-gamma receptor; downregulated by G-CSF | Modulates macrophage activation; overexpression studies |
| GM-CSF (CSF2) | Cytokine that influences adaptive immunity | Crosstalk with G-CSF; knockout models |
| OLFM4 | Modulates intestinal inflammation via ILC3 | Potential upstream regulator; knockout models |
| Dectin-1 (CLEC7A) | Pattern recognition receptor; affects neutrophil infiltration | Links innate immunity to G-CSF production; knockout models |
| EPO | Erythropoietin; affects erythropoiesis | Differential effects with G-CSF; comparative studies |
| IL22 | Cytokine produced by ILC3; promotes intestinal inflammation | Indirectly linked to G-CSF; knockout models |
| ILC3 | Innate lymphoid cells; produce IL-22 | Regulate intestinal inflammation; may influence G-CSF |
| NF-κB | Transcription factor downstream of inflammatory signals | Potential regulator of CSF3; knockout studies |
| STAT3 | Transcription factor activated by G-CSF receptor | Mediates G-CSF signaling; point mutations |
| CEBPβ | Transcription factor involved in emergency granulopoiesis | Regulates G-CSF response; knockout models |
| miRNAs (e.g., miR-125b) | Post-transcriptional regulators | Modulate G-CSF mRNA stability; overexpression studies |
| LPS/TLR4 | Pathogen recognition; induces G-CSF | Upstream activator; knockout models |
How Is positive regulation of granulocyte colony-stimulating factor production Regulated?
The positive regulation of G-CSF production is controlled by multiple signaling pathways. Inflammatory stimuli such as lipopolysaccharide (LPS) activate Toll-like receptors, leading to NF-κB and MAPK signaling that induces CSF3 transcription. The transcription factor AML1 (RUNX1) and its partner PEBP2 directly bind the CSF3 promoter to enhance its activity. Cytokines such as IL-6 and GM-CSF can further modulate G-CSF production, creating feedback loops. Additionally, G-CSF itself can downregulate interferon-gamma receptor expression and stimulate IL-6 production in macrophages, indirectly affecting its own regulation. Post-transcriptional mechanisms, including mRNA stability and microRNA-mediated repression, also contribute to fine-tuning G-CSF levels.
positive regulation of granulocyte colony-stimulating factor production and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CSF3 | Hidradenitis suppurativa; inflammation | Knockout and overexpression in keratinocytes/macrophages |
| CLEC7A (Dectin-1) | Myocardial ischemia/reperfusion injury | Knockout mice; macrophage polarization assays |
| OLFM4 | Intestinal inflammation | Knockout and knock-in in intestinal epithelial cells |
| RUNX1 | Leukemia; myeloid disorders | Point mutations to disrupt DNA binding |
| IL6 | Inflammatory diseases | Knockout and overexpression in macrophages |
Hidradenitis suppurativa
Hidradenitis suppurativa is a chronic inflammatory skin disease in which the G-CSF pathway is highly active. Elevated levels of G-CSF and its receptor components have been observed in lesional skin, suggesting that positive regulation of G-CSF production contributes to disease pathogenesis. Targeting this pathway may offer therapeutic benefits.
Myocardial ischemia/reperfusion injury
G-CSF plays a complex role in myocardial ischemia/reperfusion injury. Dectin-1, a pattern recognition receptor, contributes to injury by regulating macrophage polarization and neutrophil infiltration, processes that are influenced by G-CSF. Positive regulation of G-CSF production may exacerbate or ameliorate injury depending on context.
Intestinal inflammation
OLFM4 modulates intestinal inflammation by promoting IL-22+ innate lymphoid cells (ILC3) in the gut. Since G-CSF is a key cytokine in inflammatory responses, its positive regulation may intersect with OLFM4 and ILC3 pathways, influencing the severity of intestinal inflammation.
From positive regulation of granulocyte colony-stimulating factor production-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Does gene X regulate G-CSF production? | CRISPR knockout of gene X in macrophages or fibroblasts, followed by G-CSF ELISA |
| Does a specific mutation in transcription factor Y affect CSF3 promoter activity? | Point-mutation knock-in of the mutation, luciferase reporter assays |
| Can overexpression of gene Z enhance G-CSF production? | Overexpression cell lines (e.g., lentiviral) and cytokine profiling |
| What is the role of a candidate enhancer in G-CSF regulation? | CRISPR knock-in of tagged histone or reporter at the locus |
| Which genes are essential for G-CSF induction by LPS? | Genome-wide CRISPR library screening with LPS stimulation and G-CSF readout |
| How does G-CSF production change in a disease model? | Patient-derived cells or disease-model iPSCs with CRISPR editing |
How to Study the positive regulation of granulocyte colony-stimulating factor production Process
| Method | What It Measures | Typical Application |
|---|---|---|
| RNA-seq | mRNA levels of CSF3 and other genes | Transcriptional profiling after stimulation |
| ELISA | Secreted G-CSF protein concentration | Quantifying cytokine production in supernatants |
| Luciferase reporter | CSF3 promoter activity | Testing transcription factor binding and mutations |
| CRISPR knockout | Loss-of-function effects on G-CSF production | Identifying essential regulators |
| Overexpression | Gain-of-function effects | Confirming sufficiency of a candidate gene |
| Proteomics | Protein abundance and modifications | Global changes in signaling pathways |
| Flow cytometry | Intracellular G-CSF and surface markers | Single-cell analysis of producer cells |
| Bioinformatics | Pathway enrichment and network analysis | Interpreting CRISPR screen and omics data |
Transcriptional profiling (RNA-seq)
RNA sequencing can quantify CSF3 mRNA levels and identify global transcriptional changes upon positive regulation. It is useful for discovering upstream regulators and co-expressed genes.
Cytokine quantification (ELISA, Luminex)
Enzyme-linked immunosorbent assay (ELISA) and multiplex assays measure secreted G-CSF protein levels in cell culture supernatants or serum. These are standard readouts for functional studies of G-CSF production.
Promoter-reporter assays
Luciferase or fluorescent reporters driven by the CSF3 promoter can assess transcriptional activity. This method is ideal for testing the impact of transcription factor mutations or enhancer variants.
CRISPR screening and bioinformatics
Genome-wide CRISPR knockout or activation screens coupled with G-CSF readouts can identify novel regulators. Bioinformatics analysis of screen data reveals enriched pathways and networks.
How CRISPR Can Be Used to Study GO:0071657 positive regulation of granulocyte colony-stimulating factor production
Knockout
CRISPR knockout of candidate genes (e.g., RUNX1, IL6) can determine their necessity for G-CSF production. Cells with gene knockouts are stimulated and G-CSF levels measured by ELISA.
Point Mutation
Introducing specific point mutations (e.g., in the DNA-binding domain of RUNX1) via CRISPR can dissect the precise residues required for CSF3 promoter activation.
Knock-in
Knock-in of reporter genes (e.g., luciferase or fluorescent proteins) at the CSF3 locus allows real-time monitoring of G-CSF production in live cells.
Overexpression
CRISPR activation (CRISPRa) or lentiviral overexpression can drive supra-physiological expression of candidate regulators to test sufficiency for enhancing G-CSF production.
How EDITGENE Supports positive regulation of granulocyte colony-stimulating factor production Research
Researchers studying positive regulation of granulocyte colony-stimulating factor production-related genes often need to determine whether a candidate gene is causally involved in G-CSF synthesis, and to dissect the underlying molecular mechanisms. EDITGENE provides a comprehensive suite of CRISPR-based services to accelerate this research.
Contact EDITGENE today to design your custom CRISPR model for positive regulation of granulocyte colony-stimulating factor production research.
Frequently Asked Questions About positive regulation of granulocyte colony-stimulating factor production
What is GO:0071657?
GO:0071657 is the Gene Ontology term for positive regulation of granulocyte colony-stimulating factor production, describing any process that increases the synthesis or secretion of G-CSF.
What genes are involved in positive regulation of G-CSF production?
Key genes include CSF3 (encoding G-CSF), RUNX1 (AML1), PEBP2, IL6, and various inflammatory mediators.
How is G-CSF production regulated?
G-CSF production is regulated at transcriptional, post-transcriptional, and translational levels by inflammatory signals, transcription factors like AML1, and cytokines such as IL-6 and GM-CSF.
What diseases are associated with abnormal G-CSF regulation?
Diseases include hidradenitis suppurativa, myocardial ischemia/reperfusion injury, and inflammatory bowel conditions.
What experimental models are used to study G-CSF production?
Models include CRISPR knockout/knock-in cell lines, overexpression systems, and animal models, combined with cytokine assays and RNA-seq.
How can CRISPR be used to study G-CSF regulation?
CRISPR can create knockouts, point mutations, knock-ins, or overexpression of candidate genes to test their effects on G-CSF production.
What is the role of G-CSF in the immune system?
G-CSF drives granulopoiesis, mobilizes neutrophils, and modulates macrophage and adaptive immune functions.
Which transcription factors activate the CSF3 promoter?
AML1 (RUNX1) and its partner PEBP2 are known to activate the CSF3 promoter.
How does G-CSF affect macrophages?
G-CSF can downregulate interferon-gamma receptor expression and stimulate IL-6 production in activated human macrophages.
What methods measure G-CSF production?
ELISA, Luminex, RNA-seq, and reporter assays are commonly used to measure G-CSF production.
Conclusion
Positive regulation of granulocyte colony-stimulating factor production (GO:0071657) is a critical biological process that ensures adequate G-CSF levels for immune defense and hematopoietic homeostasis. Its dysregulation contributes to inflammatory and cardiovascular diseases, making it an attractive target for therapeutic intervention. Advances in CRISPR-based models and bioinformatics are accelerating the discovery of novel regulators and mechanisms, paving the way for new treatments.
References
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- 3. Xing Z et al.. 2024. OLFM4 modulates intestinal inflammation by promoting IL-22(+)ILC3 in the gut.. Commun Biol 7(1):914 PMID: 39075283
- 4. Wolk K et al.. 2021. Activity and components of the granulocyte colony-stimulating factor pathway in hidradenitis suppurativa.. Br J Dermatol 185(1):164-176 PMID: 33400270
- 5. Seledtsov VI et al.. 2019. Directs effects of granulocyte-macrophage colony stimulating factor (GM-CSF) on adaptive immunogenesis.. Hum Vaccin Immunother 15(12):2903-2909 PMID: 31063025
- 6. Takahashi A et al.. 1995. Positive and negative regulation of granulocyte-macrophage colony-stimulating factor promoter activity by AML1-related transcription factor, PEBP2.. Blood 86(2):607-16 PMID: 7605990
- 7. Seledtsov VI et al.. 2019. Granulocyte colony-stimulating factor downregulates interferon-gamma receptor expression and stimulates interleukin-6 production in activated human macrophages.. Growth Factors 37(3-4):164-169 PMID: 31530205
- 8. Touw IP et al.. 2007. Granulocyte colony-stimulating factor and its receptor in normal myeloid cell development, leukemia and related blood cell disorders.. Front Biosci 12:800-15 PMID: 17127321
