Epidermal Growth Factor (EGF)
Quick Facts
| Feature | Information |
|---|---|
| Full Name | Epidermal Growth Factor |
| Abbreviation | EGF |
| Molecule Type | Recombinant Growth Factor |
| Molecular Weight | ~6.2 kDa |
| Primary Receptor | EGFR (ErbB1/HER1) |
| Typical Working Concentration | 5-100 ng/mL |
| Common Stock Concentration | 10-100 μg/mL |
Overview
Epidermal Growth Factor (EGF) is a recombinant growth factor that regulates cell proliferation, survival, migration, and differentiation. It is one of the most frequently used cytokines in mammalian cell culture and is an essential component of many serum-free and chemically defined media for epithelial cells, stem cells, and organoids.
EGF exerts its biological effects by binding to the Epidermal Growth Factor Receptor (EGFR), a receptor tyrosine kinase that activates intracellular signaling pathways controlling cell growth and tissue regeneration.
Biological Function
EGF plays a central role in regulating:
- Cell proliferation
- Cell survival
- Cell migration
- Tissue repair
- Epithelial homeostasis
- Stem cell maintenance
Mechanism of Action
Binding of EGF to EGFR induces receptor dimerization and autophosphorylation, leading to activation of multiple signaling pathways, including:
- MAPK/ERK pathway
- PI3K-AKT pathway
- JAK-STAT pathway
- PLCγ pathway
These pathways regulate gene expression, metabolism, proliferation, and differentiation.
Common Applications
EGF is widely used for:
- Expansion of epithelial cells
- Neural stem cell culture
- Intestinal and other organoid cultures
- Serum-free and chemically defined media
- Wound healing assays
- Cancer biology and EGFR signaling studies
- Tissue engineering and regenerative medicine
Cell Types Commonly Supplemented with EGF
| Cell Type | Typical Application |
|---|---|
| Keratinocytes | Routine culture |
| Mammary epithelial cells | Expansion |
| Airway epithelial cells | Maintenance |
| Neural stem cells | Self-renewal |
| Intestinal organoids | Growth and maintenance |
| Patient-derived organoids | Long-term culture |
| Selected iPSC differentiation cultures | Directed differentiation |
Not all mammalian cell lines require EGF supplementation. Media composition should follow validated protocols for the specific cell type.
Typical Working Concentrations
| Application | Typical Concentration |
|---|---|
| Epithelial cells | 5-20 ng/mL |
| Neural stem cells | 20 ng/mL |
| Organoid culture | 50-100 ng/mL |
| Cancer signaling studies | Optimized experimentally |
Advantages
- Potent mitogenic activity
- Supports serum-free culture
- Promotes epithelial and stem cell proliferation
- Well-characterized signaling pathways
- Compatible with numerous defined media formulations
Limitations
- Effective only in EGFR-expressing cells
- Optimal concentration varies between cell types
- Excessive stimulation may alter cellular phenotype
- Requires appropriate storage and handling to preserve activity
Related Growth Factors
Frequently combined with:
- Fibroblast Growth Factor 2 (FGF2)
- Platelet-Derived Growth Factor (PDGF)
- Vascular Endothelial Growth Factor (VEGF)
- Transforming Growth Factor-β (TGF-β)
- Brain-Derived Neurotrophic Factor (BDNF)
- Leukemia Inhibitory Factor (LIF)
See Also
- Growth Factor Handling and Storage Guide
- Serum-Free Cell Culture
- Organoid Culture
- Stem Cell Culture
- EGFR Signaling Pathway
Key Takeaways
- EGF is a recombinant mitogenic growth factor that activates EGFR signaling.
- It is widely used for epithelial cells, neural stem cells, and organoid cultures.
- Typical working concentrations range from 5-100 ng/mL depending on the application.
- EGF is a core component of many defined and serum-free media formulations.
- Proper concentration and cell-specific optimization are essential for reproducible results.
References
- Cohen S. Journal of Biological Chemistry (1962).
- Cohen S. Cancer (1983).
- Freshney RI. Culture of Animal Cells: A Manual of Basic Technique and Specialized Applications.
- Thermo Fisher Scientific. Recombinant Human EGF Product Information.
- ATCC Animal Cell Culture Guide.