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View LargerRecombinant Human KGF/FGF-7 (Catalog # 251-KG) stimulates cell proliferation of 4MBr-5 rhesus monkey epithelial cells. The ED50 for this effect is 6-60 ng/mL.
View LargerAdult stem cells isolated from human lung biopsy tissue were embedded in Cultrex UltiMatrix RGF Basement Membrane Extract (BME001-05) and cultured for 20-60 days in lung organoid expansion medium, which includes Recombinant Human KGF/FGF-7 (Catalog # 251-KG), Recombinant Human FGF-10 (345-FG), Recombinant Human Noggin (6057-NG), and Recombinant Human R-Spondin 1 (4645-RS), along with the other reagents listed in the lung organoid expansion medium recipe in the lung organoid culture protocol. Lung organoids were able to differentiate and exhibit markers for various cell types of the lung. Lung organoids were stained with (A) a Rabbit Anti-Human Cytokeratin 5 (KRT5) Monoclonal Antibody (Novus Biologicals, Catalog # NB110-56916; green) and a Goat Anti-Human p63/TP73L Polyclonal Antibody (AF1916; red) to visualize basal cells, (B) a Hamster Anti-Mouse Podoplanin (PDPN) Monoclonal Antibody (Novus Biologicals, Catalog # NB600-1015; green) to visualize alveolar type I cells and a Goat Anti-Human p63/TP73L Polyclonal Antibody (AF1916; red) to visualize basal cells, and (C, D) a Mouse Anti-MUC5AC Monoclonal Antibody (Novus Biologicals, Catalog # NBP2-15196; green) to visualize Goblet cells and a Mouse Anti-Human/Mouse/Rat SOX2 Monoclonal Antibody (MAB2018; red). All samples were counterstained with DAPI (5748; blue).
Carrier Free
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.
251-KG
| Formulation | Lyophilized from a 0.2 μm filtered solution in MOPS, Na2SO4 and EDTA with BSA as a carrier protein. |
| Reconstitution | Reconstitute at 100 μg/mL in sterile PBS containing at least 0.1% human or bovine serum albumin. |
| Shipping | The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. |
| Stability & Storage: | Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
|
251-KG/CF
| Formulation | Lyophilized from a 0.2 μm filtered solution in MOPS, Na2SO4 and EDTA. |
| Reconstitution | Reconstitute at 100 μg/mL in sterile PBS. |
| Shipping | The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. |
| Stability & Storage: | Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
|
Recombinant Human KGF/FGF-7 Protein Summary
Product Specifications
Cys32-Thr194, with an N-terminal Met
Analysis
Background: KGF/FGF-7
KGF (keratinocyte growth factor), also known as FGF-7 (fibroblast growth factor-7), is one of 22 known members of the mouse FGF family of secreted proteins that plays a key role in development, morphogenesis, angiogenesis, wound healing, and tumorigenesis (1-4). KGF expression is restricted to cells of mesenchymal origin. When secreted, it acts as a paracrine growth factor for nearby epithelial cells (1). KGF speeds wound healing by being dramatically upregulated in response to damage to skin or internal structures that results in high local concentrations of inflammatory mediators such as IL-1 and TNF-alpha. (2, 5). KGF promotes cell migration and invasion, and mediates melanocyte transfer to keratinocytes upon UVB radiation (6, 7). It has been used ectopically to avoid chemotherapy-induced oral mucositis in patients with hematological malignancies (1). Deletion of KGF affects kidney development, producing abnormally small ureteric buds and fewer nephrons (8). It also impedes hair follicle differentiation (9). The 194 amino acid (aa) KGF precursor contains a 31 aa signal sequence and, like all other FGFs, an ~120 aa beta -trefoil scaffold that includes receptor- and heparin-binding sites. KGF signals only through the IIIb splice form of the tyrosine kinase receptor, FGF R2 (FGF R2-IIIb/KGF R) (10). Receptor dimerization requires an octameric or larger heparin or heparin sulfate proteoglycan (11). FGF-10, also called KGF2, shares 51% aa identity and similar function to KGF, but shows more limited expression than KGF and uses an additional receptor, FGF R2-IIIc (12). Following receptor engagement, KGF is typically degraded, while FGF-10 is recycled (12). Mature human KGF, which is active across species, shares 98% aa sequence identity with bovine, equine, ovine and canine, 96% with mouse and porcine, and 92% with rat KGF, respectively.
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- Werner, S. et al. (2007) J. Invest. Dermatol. 127:998.
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- Hsu, Y-R. et al. (1999) Biochemistry 38:2523.
- Belleudi, F. et al. (2007) Traffic 8:1854.
