Recombinant Human Oncostatin M (Animal-Free)

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Regulatory Status
Other Names
Oncostatin M (OSM)
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712302 10 µg 237 CHF
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OSM is a member of gp130 family of cytokines and shares significant similarities in amino acid sequence and secondary structure with leukemia inhibitory factor (LIF). Human OSM can signal through two types of receptor complexes: type I receptor (gp130/LIFR) and type II receptor (gp130/OSMRβ). Mouse OSM can only signal through type II receptor. Binding of human OSM to gp130/LIFRa complex can activate JAK1, JAK2 and Tyk2 pathways. Binding of human OSM to another receptor, gp130/OSMRβ, can activate STAT5, STAT6, PKC delta and PI3K/Akt pathways. Proteolytic cleavage of the C-terminal hydrophilic domain can significantly increase OSM activity. OSM is a pleiotropic cytokine and its activity is dependent on different tissues. It has been shown that OSM is involved in differentiation, cell proliferation, hematopoiesis, and inflammation. OSM can regulate cell proliferation through VEGF-A or Cyclin D1. OSM can regulate inflammation via induction of other cytokines and their receptors. OSM can also regulate extracellular matrix remodeling through induction of MMP-1 and TIMP-1. OSM regulates hematopoiesis by stimulating stromal cells to provide proper microenvironment. In bone marrow, OSM can also retain hematopoietic progenitors by regulating G-CSF and SDF-1 levels. OSM has also been implicated in CNS development, fat turnover, and liver regeneration.

Product Details
Technical Data Sheet (pdf)

Product Details

Human Oncostatin, amino acids Ala26-Arg234 (Accession# NP_065391.1), was expressed in E. coli.
Molecular Mass
The 210 amino acid recombinant protein has a predicted molecular mass of approximately 24 kD. The predicted N-terminal amino acid is Met.
>98%, as determined by Coomassie stained SDS-PAGE and HPLC analysis.
Lyophilized, carrier-free.
Endotoxin Level
Less than 0.1 ng per µg of protein.
Storage & Handling
Unopened vial can be stored at -20°C or -70°C. For maximum results, quick spin vial prior to opening. Reconstitute in water to a concentration of 0.1-1.0 mg/ml. Do not vortex. It is recommended to further dilute in a buffer, such as 5% Trehalose, and store working aliquots at -20°C to -80°C. Avoid repeated freeze/thaw cycles.
Determined by its ability to stimulate the proliferation of human TF-1 cells. The expected ED50 is ≤ 2.0 ng/ml, corresponding to a specific activity of ≥ 5.0 x 105 units/mg.


Antigen Details


OSM can be secreted by activated macrophages, monocytes, neutrophils, T cells, mast cells and dendritic cells.

LPS or GM-CSF can induce OSM production in neutrophile. SOCS-3 can inhibit OSM signal.
OSM regulate a variety of cell types.
OSM receptor type I (gp130/LIFR heterodimer) or OSM receptor type II (OSMRβ/gp130 heterdimer). Human OSM also binds to collagents I, II and IV.
Cell Type
Embryonic Stem Cells, Hematopoietic stem and progenitors
Biology Area
Cell Proliferation and Viability, Immunology, Stem Cells
Molecular Family
Cytokines/Chemokines, Growth Factors
Antigen References

1. Gearing DP, et al. 1992. Science. 255:1434.
2. Liu J, et al. 1994. Cytokine. 6:272.
3. Richards CD. 2013. ISRN Inflamm. 2013:512103.
4. Tanaka M, et al. 2003. Rev. Physiol. Biochem. Pharmacol. 149:39.
5. Chen SH, et al. 2004. Cytokine Growth Factor Rev. 15:379.

Gene ID
5008 View all products for this Gene ID
View information about Oncostatin M on

Related FAQs

Why choose BioLegend recombinant proteins?

     • Each lot of product is quality-tested for bioactivity as indicated on the data sheet.
     • Greater than 95% Purity or higher, tested on every lot of product.
     • 100% Satisfaction Guarantee for quality performance, stability, and consistency.
     • Ready-to-use liquid format saves time and reduces challenges associated with reconstitution.
     • Bulk and customization available. Contact us.
     • Learn more about our Recombinant Proteins.

How does the activity of your recombinant proteins compare to competitors?

We quality control each and every lot of recombinant protein. Not only do we check its bioactivity, but we also compare it against other commercially available recombinant proteins. We make sure each recombinant protein’s activity is at least as good as or better than the competition’s. In order to provide you with the best possible product, we ensure that our testing process is rigorous and thorough. If you’re curious and eager to make the switch to BioLegend recombinants, contact your sales representative today!

What is the specific activity or ED50 of my recombinant protein?

The specific activity range of the protein is indicated on the product datasheets. Because the exact activity values on a per unit basis can largely fluctuate depending on a number of factors, including the nature of the assay, cell density, age of cells/passage number, culture media used, and end user technique, the specific activity is best defined as a range and we guarantee the specific activity of all our lots will be within the range indicated on the datasheet. Please note this only applies to recombinants labeled for use in bioassays. ELISA standard recombinant proteins are not recommended for bioassay usage as they are not tested for these applications.

Have your recombinants been tested for stability?

Our testing shows that the recombinant proteins are able to withstand room temperature for a week without losing activity. In addition the recombinant proteins were also found to withstand four cycles of freeze and thaw without losing activity.

Does specific activity of a recombinant protein vary between lots?

Specific activity will vary for each lot and for the type of experiment that is done to validate it, but all passed lots will have activity within the established ED50 range for the product and we guarantee that our products will have lot-to-lot consistency. Please conduct an experiment-specific validation to find the optimal ED50 for your system.

How do you convert activity as an ED50 in ng/ml to a specific activity in Units/mg?
Use formula Specific activity (Units/mg) = 10e6/ ED50 (ng/mL)
Go To Top Version: 3    Revision Date: 05.06.2014

For research use only. Not for diagnostic use. Not for resale. BioLegend will not be held responsible for patent infringement or other violations that may occur with the use of our products.


*These products may be covered by one or more Limited Use Label Licenses (see the BioLegend Catalog or our website, BioLegend products may not be transferred to third parties, resold, modified for resale, or used to manufacture commercial products, reverse engineer functionally similar materials, or to provide a service to third parties without written approval of BioLegend. By use of these products you accept the terms and conditions of all applicable Limited Use Label Licenses. Unless otherwise indicated, these products are for research use only and are not intended for human or animal diagnostic, therapeutic or commercial use.


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