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The interleukin 4 (IL4, IL-4) is a cytokine that induces differentiation of naive helper T cells (T h 0 cells) to T h 2 cells. Upon activation by IL-4, T h 2 cells subsequently produce additional IL-4 in a positive feedback loop. IL-4 is produced primarily by mast cells, T h 2 cells, eosinophils and basophils. [4]
Interleukin 10 (IL-10) is a protein that inhibits the synthesis of a number of cytokines, including IFN-gamma, IL-2, IL-3, TNF, and GM-CSF produced by activated macrophages and by helper T cells. In structure, IL-10 is a protein of about 160 amino acids that contains four conserved cysteines involved in disulphide bonds. [ 33 ]
ILC2s produce cytokines that promote an anti-inflammatory immune response e.g. IL-13, IL-4, Amphiregulin, favouring tumor growth. [55] However, in some settings ILC2s can produce IL-5 promoting a cytotoxic response from eosinophils and therefore an anti-tumor response. [56] [57] ILC3s can also be involved in pro or anti-tumorigenic environments.
IL-4 is the positive feedback cytokine for T h 2 cells differentiation. Besides, IL-4 stimulates B-cells to produce IgE antibodies, which in turn stimulate mast cells to release histamine, serotonin, and leukotriene to cause broncho-constriction, intestinal peristalsis, gastric fluid acidification to expel helminths. IL-5 from CD4 T cells will ...
T H 1 cells which produce interferon gamma and lymphotoxin alpha, T H 2 cells which produce IL-4, IL-5, and IL-13. A third category called T helper 17 cells (T H 17) were also discovered which are named after their secretion of Interleukin 17. CD8 + cytotoxic T-cells may also be categorized as: [5] T c 1 cells, T c 2 cells.
The interleukin 4 receptor is a type I cytokine receptor.It is a heterodimer, that is, composed of two subunits. IL4R is the human gene coding for IL-4Rα, the subunit which combines with either common gamma chain (γc, forming the type I IL4 receptor) or with IL-13Rα1 (forming the type II IL4 receptor).
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The T cell also produces IL-4, which directly influences B cells. As a result of this stimulation, the B cell can undergo rapid cellular division to form a germinal center where antibody isotype switching and affinity maturation occurs, as well as their differentiation to plasma cells and memory B cells. The end-result is a B cell that is able ...