Cat. #:GMP-101-21
Recombinant Human Interleukin-21 GMP
rHuIL-21 GMP
Technical Parameters
Source Escherichia coli.
Molecular Weight Approximately 15.4 kDa, a single non-glycosylated polypeptide chain containing 133 amino acids.
Quantity 5µg/100µg/1mg
Purity > 98 % by SDS-PAGE and HPLC analyses.
Biological Activity Fully biologically active when compared to standard. The ED50 as determined by a cell proliferation assay using human N1186 T cells is less than 20 ng/ml, corresponding to a specific activity of > 5.0 × 104 IU/mg.
Physical Appearance Sterile Filtered White lyophilized (freeze-dried) powder.
Formulation Lyophilized from a 0.2 µm filtered concentrated solution in PBS, pH 7.4.
Endotoxin Less than 0.01 EU/µg of rHuIL-21 GMP as determined by LAL method.
Reconstitution We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Reconstitute in sterile distilled water or aqueous buffer containing 0.1 % BSA to a concentration of 0.1-1.0 mg/mL. Stock solutions should be apportioned into working aliquots and stored at ≤ -20 °C. Further dilutions should be made in appropriate buffered solutions.
Stability & Storage Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70 °C as supplied.
1 month, 2 to 8 °C under sterile conditions after reconstitution.
3 months, -20 to -70 °C under sterile conditions after reconstitution.
Usage This GMP product can be for research use or further manufacturing use.
Quality statement The manufacture and testing of this product is in compliance with ICH Q7a guidelines.
Reference1. Pistoia VandCocco C. 2009. J Leukoc Biol, 85: 739-43.
2. Ertelt JM, Johanns TM, Rowe JH, et al. 2010. Immunology, 131: 183-91.
3. Denman CJ, Senyukov VV, Somanchi SS, et al. 2012. PLoS One, 7: e30264.
4. Spolski R, Wang L, Wan CK, et al. 2012. J Immunol, 188: 1924-32.
BackgroundHuman IL-21 is encoded by IL-21 gene located on Chr. 4. It is a pleiotropic cytokine produced by CD4+ T cells in response to antigenic stimulation and can regulating immune system cells, for instance cytotoxin T cells and natural killer cells. Additionally, it can induce target cells division or proliferation. IL-21 elicits its effect through binding to IL-21R, which also contains the gamma chain found in other cytokine receptors such as IL-2, IL-4, IL-7, IL-9 and IL-15. IL-21/IL-21R interaction triggers a cascade of events which includes activation of the tyrosine kinases JAK1 and JAK3, followed by activation of the transcription factors STAT1 and STAT3. IL-21 shows having much relation with clinical illnesses, including cancer immunotherapy, viral infections and allergies.