Interleukin-4 (IL-4) is a T cell derived chemokine th at stimulates the Th2 mediated immune response and proliferation of B cells. The effects of IL-4 are mediated by two types of receptors, type I receptor consisting of IL-4Rα and common γ chain and type II receptor composed of IL-4Rα and IL-13Rα1. The signaling stimulated by IL-4 leads to activation of JAK/STAT6 and IRS-mediated PI3K/Akt pathway. IL-4 is responsible for endocytic activity of macrophages, chemotaxis of leukocytes in response to inflammation, angiogenesis and regulation of nitric oxide metabolism in macrophages. Conjugation of R-Phycoerythrin to the antibody enables its use in immunofluorescent techniques.
