单词 | interleukin-4 |
释义 | interleukin-4interleukin-4[‚in·tər′lük·ən ′fȯr]interleukin-4in·ter·leu·kin-4(in'tĕr-lū'kin),IL4A gene on chromosome 5q31.1 that encodes interleukin-4, a pleiotropic cytokine produced by activated T cells, which participates in several B-cell activation processes. IL-4 is a ligand for IL4 receptor (as is IL13), and it induces the expression of class II MHC molecules on resting B-cells. It activates several B-cell and other cell processes; is a co-stimulator of DNA-synthesis; enhances secretion and cell surface expression of IgE and IgG1; and regulates expression of the low-affinity Fc receptor for IgE (CD23) on lymphocytes and monocytes.in·ter·leu·kin-4(in'tĕr-lū'kin)Synonym(s): B-cell differentiating factor. interleukin-4A CYTOKINE produced by HELPER T CELLS, MAST CELLS and bone marrow that has a wide range of actions. It promotes the proliferation of B cells, T cells, MAST CELLS and blood forming cells; it induces the formation of MAJOR HISTOCOMPATIBILITY COMPLEXES on B cells; and it is believed to promote class switching in B cells from one class of antibodies to another. |
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