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Interleukin 3 (IL3) is a cytokine that regulates hematopoiesis by controlling the production, differentiation and function of granulocytes and macrophages. [ 15 ] [ 16 ] The protein, which exists in vivo as a monomer, is produced in activated T cells and mast cells, [ 15 ] [ 16 ] and is activated by the cleavage of an N-terminal signal sequence.
An inflammatory cytokine is a type of cytokine (a signaling molecule) that is secreted from immune cells and certain other cell types that promotes inflammation. Inflammatory cytokines are predominantly produced by T helper cells ( T h ) and macrophages and involved in the upregulation of inflammatory reactions. [ 1 ]
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]
The IL-10 family is one of the important types of cytokines, that can stop the inflammation. In general. these cytokines have a helical structure of homodimers. [4] The difference that the members of IL-10 family have between each other is that they have various receptor-binding residues, which help with interaction with specific cytokine receptors. [5]
Interleukin-2 (IL-2) is an interleukin, which is a type of cytokine signaling molecule forming part of the immune system. It is a 15.5–16 kDa protein [ 5 ] that regulates the activities of white blood cells (leukocytes, often lymphocytes ) that are responsible for immunity.
Because cytokines are characterised by considerable redundancy and pleiotropism, such distinctions, allowing for exceptions, are obsolete. The term interleukin was initially used by researchers for those cytokines whose presumed targets are principally white blood cells (leukocytes). It is now used largely for designation of newer cytokine ...
This cytokine may bind or may itself be a ligand of the IL-18 receptor (IL18R1 / IL-1Rrp). It binds to the interleukin 18 binding protein (IL18BP), forming a complex with the beta subunit of the IL-18 receptor (IL-1F4), thereby inhibiting its activity. 5 alternative transcripts encoding different IL-37 isoforms have been described. [45]
IL-12 binds to the IL-12 receptor, which is a heterodimeric receptor formed by IL-12Rβ1 and IL-12Rβ2. [6] IL-12Rβ2 is considered to play a key role in IL-12 function, since it is found on activated T cells and is stimulated by cytokines that promote Th1 cells development and inhibited by those that promote Th2 cells development.
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