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STAT3 plays an important role in psoriasis, as STAT3 can control the production of IL-23 receptors, and IL-23 can help the development of Th17 cells, and Th17 cells can induce psoriasis. [63] Also, since many cytokines function through the STAT3 transcription factor, STAT3 plays a significant role in maintaining skin immunity. [58]
Specifically, STAT3 becomes activated after phosphorylation of tyrosine 705 in response to such ligands as interferons, epidermal growth factor (EGF), interleukin (IL-)5 and IL-6. Additionally, activation of STAT3 may occur via phosphorylation of serine 727 by mitogen-activated protein kinases (MAPK) [6] and through c-src non-receptor tyrosine ...
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.
While IL-1β is released by monocytes and macrophages, it is also present in nociceptive DRG neurons. IL-6 plays a role in neuronal reaction to an injury. TNF-α is a well known proinflammatory cytokine present in neurons and the glia. TNF-α is often involved in different signaling pathways to regulate apoptosis in the cells.
IAS proteins were originally identified in studies that were aimed to decipher the Janus Kinase (JAK)/STAT signaling pathway. Originally, PIAS3 was found to interact specifically with phosphorylated STAT3 in Interleukin -6 (IL-6) activated murine myeloblast M1 cells. [9] This interaction is mediated via PIAS3 binding to the STAT3 DNA binding ...
STAT6 is also required for the development of IL-9-secreting T cells. [5] STAT6 also plays a critical role in Th2 lung inflammatory responses including clearance of parasitic infections and in the pathogenesis of asthma. [8] Th2-cell derived cytokines as IL-4 and IL-13 induce the production of IgE which is a major mediator in allergic response. [9]