Interleukin-13 (IL-13) is a cytokine produced by activated T lymphocytes which regulates the function of mouse macrophages and shares some biological functions with IL-4. Administration of mouse IL-13 to cultured mouse macrophages induces morphological changes (flattening, and development of processes), leads to increases in class II MHC antigen expression, and inhibits the synthesis of several proinflammatory cytokines (including IL-1β, IL-6, TNF, and IL-12). In contrast to human IL-13, mouse IL-13 does not appear to have activity for mouse B cells. Recombinant mouse IL-13 (mIL-13) has multiple glycosylated forms ranging in molecular weights from 11.3 to 15 kD, as detected by SDS-PAGE analysis. Formulation and Purity : Recombinant mouse IL-13 is supplied as a frozen aqueous buffered solution containing 1.0 mg/ml biotechnology grade, low endotoxin bovine serum albumin, with no preservatives. Recombinant mouse IL-13 is  ≥95% pure, as determined by SDS-PAGE, and an absorbance assay based on the Beers- Lambert law. The endotoxin level is ≤0.1 ng per µg of mouse IL-13, as measured in a chromogenic LAL assay.

(RUO)

100 µg/ml

ELISA (Routinely Tested), Bioassay (Tested During Development)

IL-13

Frozen aqueous buffered solution containing BSA.

Development References(5) 1. Cherwinski HM, Schumacher JH, Brown KD, Mosmann TR. Two types of mouse helper T cell clone. III. Further differences in lymphokine synthesis between Th1 and Th2 clones revealed by RNA hybridization, functionally monospecific bioassays, and monoclonal antibodies. J Exp Med. 1987; 166(5):1229-1244. (Biology). 2. Doherty TM, Kastelein R, Menon S, Andrade S, Coffman RL.. Modulation of murine macrophage function by IL-13. J Immunol. 1993; 151(12):7151-7160. (Biology). 3. Kitamura T, Tange T, Terasawa T, et al. Establishment and characterization of a unique human cell line that proliferates dependently on GM-CSF, IL-3, or erythropoietin. J Cell Physiol. 1989; 140(2):323-334. (Methodology). 4. McKenzie A, Zurawski G. Measurement of IL-13. In: Coligan, Kruisbeek, Shevak, Strober, ed. Current Protocols in Immunology. New York: John Wiley & Sons; 1994:18-19. 5. Zurawski G, de Vries JE.. Interleukin 13, an interleukin 4-like cytokine that acts on monocytes and B cells, but not on T cells. Immunol Today. 1994; 15(1):19-26. (Biology).