Interleukin 31 (IL-31), a four-helix bundle inflammatory cytokine, belongs to the IL-6 cytokine family which includes IL-6 (Catalog #78050), oncostatin M (Catalog #78094), leukemia inhibitory factor (LIF; Catalog #78055), and cardiotrophin-1 (Catalog #78160; Dillon et al.). IL-31 signals through a heterodimer composed of IL-31RA (also known as gp130-like receptor or GPL) and the oncostatin-M receptor (OSMR), both of which are expressed on monocytes (Diveu et al.; Ghilardi et al.), epithelial cells (Ip et al.), and keratinocytes (Kato et al.). Signaling through the GPL/OSMR complex activates the JAK/STAT, RAS/ERK, and PI3K/AKT signaling pathways, resulting in the downstream activation of STAT1, STAT3, and STAT5 transcription factors (Cornelissen et al.; Dambacher et al.; Dillon et al.; Ip et al.). IL-31 responses have been associated with allergic responses and inflammatory skin diseases including atopic dermatitis (Cornelissen et al.; Gangemi et al.).
Dendritic Cells, Intestinal Cells, Macrophages, Monocytes, T Cells
(A) The biological activity of Human Recombinant IL-31 was tested by STAT3 activation in U-87 MG cells. The detection limit was ≤ 25 ng/mL.
(B) Human Recombinant IL-31 was resolved with SDS-PAGE under reducing (+) conditions and non-reducing (-) conditions and visualized by Coomassie Blue staining. Human Recombinant IL-31 has a predicted molecular mass of 15.8 kDa.
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