Human Interleukin-4, IL-4 HiLA Kit

The interleukin 4 (IL4, IL-4) is a cytokine that induces differentiation of naive helper T cells (Th0 cells) to Th2 cells. Upon activation by IL-4, Th2 cells subsequently produce additional IL-4 in a positive feedback loop. IL-4 is produced primarily by mast cells, Th2 cells, eosinophils and basophils.It is closely related and has functions similar to IL-13.Interleukin 4 has many biological roles, including the stimulation of activated B cell and T cell proliferation, and the differentiation of B cells into plasma cells. It is a key regulator in humoral and adaptive immunity. IL-4 induces B cell class switching to IgE, and up-regulates MHC class II production. IL-4 decreases the production of Th1 cells, macrophages, IFNγ, and dendritic cells IL-12.

Product Specifications

Applications

For quantitative detection of human IL-4 in buffer solution, serum, cell culture supernatant.

Assay Principle

Incubate the acceptor beads coated with anti-IL-4 antibody1, biotin conjugated anti-IL-4 antibody 2, and the sample to form a sandwich immune complex (antibody 1-sample- antibody 2) . the immune complex is the n incubated withdonor beads coated with streptavidin to form a chemiluminescent complex, ensuring that the distance between the two beads is less than 200 nm. When the distance between the two beads is less than 200 nm, the donor beads is excited by light (680 nm), producing singlet oxygen which diffuses to the acceptor beads, inducing energy transfer. the acceptor beads absorb this energy and emit scattering light at 615 nm. the light signal is collected by a photosensitive detector, and the concentration ofIL-4in the sample is calculated through mathe matical fitting. In the absence of humanIL-4in the sample, no immune complex is formed, or the distance between the two beads exceeds 200 nm, exceeding the transfer distance for singlet oxygen, and the acceptor beads do not emit any light.