Product Pathways - Growth Factors/Cytokines
Mouse Interleukin-3 (mIL-3) #8923
PhosphoSitePlus® protein, site, and accession data: IL3
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Source
Recombinant mouse interleukin-3 (mIL-3) Ala27-Cys166 (Accession # NM_010556) was produced in E. coli at Cell Signaling Technology.
Molecular Characterization
Recombinant mIL-3 does not have a Met on the amino terminus and has a calculated MW of 15,674. DTT-reduced protein migrates as a 16 kDa polypeptide and non-reduced protein migrates as a 14 kDa polypeptide due to intramolecular cystines. The expected amino-terminal ASISG of recombinant mIL-3 was verified by amino acid sequencing.
Purity
>98% as determined by SDS-PAGE of 6 μg reduced (+) and non-reduced (-) recombinant mIL-3. All lots are greater than 98% pure.
Bioactivity
The bioactivity of recombinant mIL-3 was determined in MC/9 and BaF3 cell proliferation assays. The ED50 of each lot is between 2-50 pg/ml in MC/9 cells and 20-90 pg/mL in BaF3 cells.
Coomassie Gel
The purity of recombinant mIL-3 was determined by SDS-PAGE of 6 µg reduced (+) and non-reduced (-) recombinant mIL-3 and staining overnight with Coomassie Blue.
Bioactivity
The proliferation of BaF3 cells treated with increasing concentrations of mIL-3 was assessed. After 48 hour treatment with mIL-3, cells were incubated with a tetrazolium salt and the OD450 - OD650 was determined.
Bioactivity
The proliferation of MC/9 cells treated with increasing concentrations of mIL-3 was assessed. After 72 hour treatment with mIL-3, cells were incubated with a tetrazolium salt and the OD450 - OD650 was determined.
Western Blotting
Western blot analysis of extracts from BaF3 cells, untreated or treated with mIL-3 for 10 minutes, using Phospho-Stat5 (Tyr694) (C11C5) Rabbit mAb #9359 (upper) and Stat5 (3H7) Rabbit mAb #9358 (lower).
Endotoxin
Less than 0.01 ng endotoxin/1 μg mIL-3.
Formulation
With carrier: Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.2 containing 20 μg BSA per 1 μg mIL-3. Carrier free: Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.2.
Background
IL-3 is produced by T cells, mast cells and eosinophils (1). Target cells include hematopoietic progenitors, neutrophils, macrophages, mast cells, eosinophils, lymphoid and erythroid cells (1). IL-3 supports growth and differentiation and is used as a media additive to support culture of many cell types (1). The IL-3 receptor is a heterodimer of the IL-3 specific α-chain and the common β-chain, βc, which is also used by GM-CSF and IL-5. (1). Binding of IL-3 can also involve substitution of the βc by a βIL-3-chain that appears to be specific for IL-3 (1,2). Binding of IL-3 to its cognate receptor(s) induces activation of Jak2, phosphorylation of multiple Stats (1,3,5,6), and the PI3K/Akt pathway (1). IL-3 may play an important role in the development of airway inflammation associated with asthma (3,4,5).
- Reddy, E.P. et al. (2000) Oncogene 19, 2532-47.
- Hara, T. and Miyajima, A. (1992) EMBO J 11, 1875-84.
- Asquith, K.L. et al. (2008) J Immunol 180, 1199-206.
- Schroeder, J.T. et al. (2009) J Immunol 182, 2432-8.
- Munitz, A. et al. (2006) J Immunol 177, 77-83.
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Companion Products
This product is intended for research purposes only. The product is not intended to be used for therapeutic or diagnostic purposes in humans or animals.
