IL-9 Protein, Rat, Recombinant (His Tag)

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IL-9 Protein, Rat, Recombinant (His Tag): Product Information

Purity
> 90 % as determined by SDS-PAGE.
Endotoxin
< 1.0 EU per μg protein as determined by the LAL method.
Activity
Measured in a cell proliferation assay using MC/9-2 mouse mast cells.
The ED50 for this effect is typically 19.8-79.2 ng/mL.
Protein Construction
A DNA sequence encoding the rat Il9 (NP_001099217.1) (Met1-Ala144) was expressed with a polyhistidine tag at the C-terminus.
Accession#
Expressed Host
Baculovirus-Insect Cells
Species
Rat
Predicted N Terminal
Gln 19
Molecule Mass
The recombinant rat Il9 consists 137 amino acids and predicts a molecular mass of 15.6 kDa.
Formulation
Lyophilized from sterile 20 mM Tris, 500 mM NaCl, 10 % glycerol.
1. Normally 5 % - 8 % trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
2. Please contact us for any concerns or special requirements.
Please refer to the specific buffer information in the hard copy of CoA.
Shipping
In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.
Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
Stability & Storage
Samples are stable for up to twelve months from date of receipt at -20℃ to -80℃
Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
Reconstitution
A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.

IL-9 Protein, Rat, Recombinant (His Tag): Images

Measured in a cell proliferation assay using MC/9-2 mouse mast cells. The ED50 for this effect is typically 19.8-79.2 ng/mL.

IL-9 Background Information

Interleukin 9, also known as IL-9, is a cytokine (cell signalling molecule) belonging to the group of interleukins. IL-9 is a cytokine that acts as a regulator of a variety of hematopoietic cells. This cytokine stimulates cell proliferation and prevents apoptosis. It functions through the interleukin 9 receptor (IL-9R), which activates different signal transducer and activator (STAT) proteins and thus connects this cytokine to various biological processes. Genetic studies on a mouse model of asthma demonstrated that this cytokine is a determining factor in the pathogenesis of bronchial hyperresponsiveness. IL-9 is a key molecule that affects differentiation of TH17 cells and Treg function. IL-9 predominantly produced by TH17 cells, synergizes with TGF-β1 to differentiate naïve CD4+ T cells into TH17 cells, while IL-9 secretion by TH17 cells is regulated by IL-23. Interestingly, IL-9 enhances the suppressive functions of FoxP3+ CD4+ Treg cells in vitro, and absence of IL-9 signaling weakens the suppressive activity of nTregs in vivo, leading to an increase in effector cells and worsening of experimental autoimmune encephalomyelitis. The mechanism of IL-9 effects on TH17 and Tregs is through activation of STAT3 and STAT5 signaling. Our findings highlight a role of IL-9 as a regulator of pathogenic versus protective mechanisms of immune responses.
Full Name
interleukin 9
References
  • Elyaman W, et al. (2009) IL-9 induces differentiation of TH17 cells and enhances function of FoxP3+ natural regulatory T cells. Proc Natl Acad Sci U S A. 106(31): 12885-90.
  • Dong Q, et al. (1999) IL-9 induces chemokine expression in lung epithelial cells and baseline airway eosinophilia in transgenic mice. Eur J Immunol. 29(7): 2130-9.
  • Kimura Y, et al. (1995) Sharing of the IL-2 receptor gamma chain with the functional IL-9 receptor complex. Int Immunol. 7(1): 115-20.
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