Mouse Interleukin-4 Recombinant

Interleukin-4 is produced mainly by a subpopulation of activated T-cells (Th2) that are the biologically most active helper cells for B-cells and that also secrete IL-5 and IL-6. The biological activities of IL-4 are mediated by a specific receptor. The extracellular domain of the IL-4 receptor is related to the receptors for EPO, IL-6, and the beta chain of the IL2 receptor (CD124) . Two types of IL-4 receptor (IL-4R) exist: the type 1 receptor is a heterodimer consisting of CD132 and IL-4R-alpha. The type 2 receptor is a heterodimer consisting of IL-4Ralpha and IL-13Ralpha1. IL-4 enhances expression of MHC class 2 antigens on B-cells. It can promote their capacity to respond to other B-cell stimuli and to present antigens for T-cells. Pretreatment of macrophages with IL-4 prevents the production of IL1, TNF-alpha and prostaglandins in response to activation of the cells by bacterial endotoxins or IFN-gamma. IL-4 synergises with EPO and G-CSF in the generation of colonies containing granulocytes or erythroid progenitor cells in a colony formation assay.

Reconstitute at 0.1-1.0 mg/ml in distilled water. This solution can then be diluted into other buffers. To maximize product collection from vial surface, vortex briefly and then spin down to recollect the liquid.

The lyophilized protein is stable for at least 2 years from date of receipt when stored at -20°C. Upon reconstitution, store in working aliquots at +4°C for up to one month, or at -20°C for up to six months, in the presence of a carrier protein. Avoid repeated freeze/thaw cycles.