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Recombinant Rat IL-10
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BD Pharmingen™ Recombinant Rat IL-10

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Interleukin-10 (IL-10), (aka Cytokine Synthesis Inhibitory Factor CSIF), is an 18.5 kD protein that shares over 80% sequence homology with the Epstein-Barr Virus protein BCRFI. The reported biological activities of IL-10, which may be interrelated, include inhibition of macrophage-mediated cytokine synthesis, suppression of the delayed type hypersensitivity response, and stimulation of the Th2 cell response, which results in elevated antibody production. The net effect of IL-10 action appears to be the inhibition of proinflammatory T cell mediated immunity.

Purity and Formulation: The rat IL-10 was found to be > 95% pure by SDS-PAGE analysis, and an absorbance assay based on the Beer-Lambert Law. The endotoxin level is ≤ 0.1 ng per µg of IL-10.

Recombinant rat IL-10 is supplied as a frozen liquid comprised of 0.22 µm sterile-filtered Dulbecco's PBS pH 7.2 and 1.0 mg/ml BSA carrier protein.

BD Pharmingen™
100 µg/ml
Frozen aqueous buffered solution containing BSA.
ELISA Standard (Routinely Tested), Intracellular block/flow cytometry (Tested During Development)


This preparation contains no preservatives, thus it should be handled under aseptic conditions. Store product at -80°C prior to use or for long term storage of stock solutions. Rapidly thaw and quick-spin product prior to use. Avoid multiple freeze-thaws of product.

Upon initial thawing the product should be aliquoted into polypropylene microtubes and frozen at -80°C for future use. Alternatively, the product can be diluted in sterile neutral buffer containing not less that 0.5 - 1.0 mg/ml carrier protein* such as human or bovine serum albumin, aliquoted and stored at -80°C. For use as an ELISA standard we recommend carrier-protein concentrations of 5 - 10 mg/ml. Failure to add carrier protein or store at indicated temperatures may result in a loss of activity.


ELISA Standard: The recombinant rat IL-10 (Cat. No. 555113) is useful as a quantitative standard for a sandwich ELISA for measuring rat IL-10 protein levels. Purified A5-7 antibody (Cat. No. 555083) is recommended to use as the capture antibody and can be paired with biotinylated A5-6 antibody (Cat. No. 555084), with recombinant rat IL-10 as the standard. To obtain linear standard curves, doubling dilutions of rat IL-10 ranging from ~2,000 to 5 pg/ml are recommended for inclusion in each ELISA plate. For specific methodology, please see the chapter on ELISA in the Immune Function Handbook, which is posted on our web site,

Immunofluorescent Staining and Flow Cytometric Analysis: The recombinant rat IL-10 can be used as a blocking control to demonstrate specificity of IL-10 staining by the PE-A5-4 antibody, (Cat. No. 555088). The intracellular cytokine staining technique and use of blocking controls are described in detail by C. Prussin and D. Metcalfe. For specific methodology, please visit the protocols sections or the chapter on intracellular staining in the Immune Function Handbook, both of which are posted on our web site,

*Carrier proteins should be pre-screened for possible effects in an appropriate experimental system. Carrier proteins may effect experimental results due to toxicity, high endotoxin levels or possible blocking activity.

Unit is defined as the amount of material required to stimulate a half-maximal response at cytokine saturation.


  1. Since applications vary, each investigator should titrate the reagent to obtain optimal results.
  2. Please refer to for technical protocols.
  3. Source of all serum proteins is from USDA inspected abattoirs located in the United States.
555113 Rev. 1
Citations & References
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Development References (3)

  1. Feng L, Tang WW, Chang JC, Wilson CB. Molecular cloning of rat cytokine synthesis inhibitory factor (IL-10) cDNA and expression in spleen and macrophages. Biochem Biophys Res Commun. 1993; 192(2):452-458. (Biology). View Reference
  2. Fiorentino DF, Bond MW, Mosmann TR. Two types of mouse T helper cell. IV. Th2 clones secrete a factor that inhibits cytokine production by Th1 clones. J Exp Med. 1989; 170(6):2081-2095. (Biology). View Reference
  3. Prussin C, Metcalfe DD. Detection of intracytoplasmic cytokine using flow cytometry and directly conjugated anti-cytokine antibodies. J Immunol Methods. 1995; 188(1):117-128. (Methodology: IC/FCM Block). View Reference
555113 Rev. 1

Please refer to Support Documents for Quality Certificates

Global - Refer to manufacturer's instructions for use and related User Manuals and Technical data sheets before using this products as described

Comparisons, where applicable, are made against older BD Technology, manual methods or are general performance claims.  Comparisons are not made against non-BD technologies, unless otherwise noted.

For Research Use Only. Not for use in diagnostic or therapeutic procedures.