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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 ...
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.
MIP-1α and MIP-1β are major factors produced by macrophages and monocytes after they are stimulated with bacterial endotoxin [5] or proinflammatory cytokines such as IL-1β. [4] But it appears that they can be expressed by all hematopoietic cells and some tissue cells such as fibroblasts, epithelial cells, vascular smooth muscle cells or ...
Interleukin 6 (IL-6) is an interleukin that acts as both a pro-inflammatory cytokine and an anti-inflammatory myokine. In humans, it is encoded by the IL6 gene. [5] In addition, osteoblasts secrete IL-6 to stimulate osteoclast formation. Smooth muscle cells in the tunica media of many blood vessels also produce IL-6 as a pro-inflammatory cytokine.
They mainly act on white blood cells, as well as on endothelial cells in blood vessels to promote an early inflammatory response. [5] TNF is the principal cytokine for regulating acute inflammation, though many of its functions are shared with other cytokines, especially IL-1.
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 ]
Their release is often stimulated by pro-inflammatory cytokines such as interleukin 1. Inflammatory chemokines function mainly as chemoattractants for leukocytes, recruiting monocytes, neutrophils and other effector cells from the blood to sites of infection or tissue damage.
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.