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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 ]
It is known to induce inflammation by activating NF-κB pathway by binding to TLR, TLR4, TLR9, and RAGE (receptor for advanced glycation end products). [20] HMGB1 can also induce dendritic cell maturation via upregulation of CD80, CD83, CD86 and CD11c, and the production of other pro-inflammatory cytokines in myeloid cells (IL-1, TNF-a, IL-6 ...
The soluble form is produced by hepatocytes and regulated by pro-inflammatory cytokines (IL1-β and a combination of IL1-β and IL-6) and other acute phase proteins. The intracellular form was found in fibroblasts, monocytes, neutrophils, keratinocytes and bronchial epithelial cells.
The inflammasome was discovered by the team of Jürg Tschopp, at the University of Lausanne, in 2002. [17] [18] In 2002, it was first reported by Martinon et al. [17] that NLRP1 (NLR family PYD-containing 1) could assemble and oligomerize into a structure in vitro, which activated the caspase-1 cascade, thereby leading to the production of pro-inflammatory cytokines, including IL-1β and IL-18.
This classification is not strict; for example, CCL20 can act also as pro-inflammatory chemokine. [5] Inflammatory: these are formed under pathological conditions (on pro-inflammatory stimuli, such as IL-1, TNF-alpha, LPS, or viruses) and actively participate in the inflammatory response attracting immune cells to the site of inflammation.
Interleukin 17 family (IL17 family) is a family of pro-inflammatory cystine knot cytokines. [2] They are produced by a group of T helper cell known as T helper 17 cell in response to their stimulation with IL-23. Originally, Th17 was identified in 1993 by Rouvier et al. who isolated IL17A transcript from a rodent T-cell hybridoma. [3]
Senescence-associated secretory phenotype (SASP) is a phenotype associated with senescent cells wherein those cells secrete high levels of inflammatory cytokines, immune modulators, growth factors, and proteases. [1] [2] SASP may also consist of exosomes and ectosomes containing enzymes, microRNA, DNA fragments, chemokines, and other bioactive ...
IL-1β led to the production of an antigen-specific pro-inflammatory subset of T helper cells (T H17). In combination with other cytokines, interleukin-1β can upregulate the production of the cytokine GM-CSF which is correlated to neuroinflammation. Detailed mechanisms on this front are yet to be elucidated.