IL22 is part of the IL10 family of regulatory cytokines, which includes IL10, IL19, IL20, IL22, IL24 and IL26. Members of this family share partial homology in their amino acid sequences, but they are dissimilar in their biological functions. Produced by activated T-lymphocytes and dendritic cells, IL10 contributes to the inflammatory response in vivo. IL22 uses CRF2-4, a member of the class II cytokine receptor family, and IL22R, IL22 receptor, to produce its downstream effects. IL22 and IL17 are rapidly produced by splenic lymphoid tissue inducer–like cells (LTi-like cells) and Th17 cells and likely plays a role in the coordinated response of both the adaptive and innate immune systems.

IL22 belongs to the IL10 family of regulatory cytokines, which includes IL10, IL19, IL20, IL22, IL24 and IL26. Members of this family share partial homology in their amino acid sequences, but they are dissimilar in their biological functions. Produced by T-lymphocytes and dendritic cells, IL10 contributes to the inflammatory response in vivo. IL22 signals through CRF2-4 and IL22. IL22 along with IL17 are rapidly produced by splenic lymphoid tissue inducer–like cells (LTi-like cells) and can be also produced by Th17 cells. It is also likely that IL22 plays a role in the coordinated response of both the adaptive and innate immune systems. Recombinant mouse interleukin-22 contains 147 amino acids and has approximately 81% and 92% amino acid sequence identity with human and rat IL22, respectively.

IL22 belongs to IL10 family of regulatory cytokines, which includes IL10, IL19, IL20, IL22, IL24 and IL26. Members of this family share partial homology in their amino acid sequences, but are dissimilar in their biological functions. Produced by T-lymphocytes and dendritic cells, IL10 contributes to the inflammatory response in vivo, and signals through CRF2-4 and IL22. Along with IL17, it is rapidly produced by splenic LTi-like cells and can be also produced by Th17 cells. It is likely that IL22 plays a role in the coordinated response of both the adaptive and innate immune systems.

Interleukin-3 beta (IL3B) and IL3A are two variants of IL3. IL3A and IL3B are identical aside from the fact that IL3A has three extra amino acids inserted at position 56. IL3 is a hematopoietic growth factor that promotes the survival, differentiation and proliferation of committed progenitor cells of the megakaryocyte, granulocyte-macrophage, erythroid, eosinophil, basophil and mast cell lineages. Produced by T-cells, mast cells and eosinophils, IL3 enhances thrombopoieses, phagocytosis and antibody-mediated cellular cytotoxicity. Its ability to activate monocytes suggests that IL3 may have additional immunoregulatory roles. Many of the IL3 activities depend upon co-stimulation with other cytokines. IL3 is a species-specific, variably glycosylated cytokine.

Interleukin-3 (IL3) is a hematopoietic growth factor that promotes the survival, differentiation and proliferation of committed progenitor cells of the megakaryocyte, granulocyte-macrophage, erythroid, eosinophil, basophil and mast cell lineages. Produced by T-cells, mast cells and eosinophils, IL3 enhances thrombopoieses, phagocytosis and antibody-mediated cellular cytotoxicity. Its ability to activate monocytes suggests that IL3 may have additional immunoregulatory roles. Many of the IL3 activities depend upon co-stimulation with other cytokines. IL3 is species-specific, variably glycosylated cytokine.

Interleukin 3 is a pleiotropic factor produced primarily by activated T-cells that can stimulate the proliferation and differentiation of pluripotent hematopoietic stem cells as well as various lineage committed progenitors. In addition, IL3 also affects the functional activity of mature mast cells, basophils, eosinophils and macrophages. Because of its multiple functions and targets, it was originally studied under different names, including mast cell growth factor, P-cell stimulating factor, burst promoting activity, multicolony stimulating factor, thy-1 inducing factor and WEHI-3 growth factor.

In addition to activated T-cells, other cell types can also produce IL3, such as human thymic epithelial cells, activated murine mast cells, murine keratinocytes and neurons/astrocytes. At the amino acid sequence level, mature human and murine IL3 share only 29% sequence identity. Consistent with this lack of homology, IL3 activity is highly species-specific and human IL3 does not show activity on murine cells.

Interleukin 3 is a pleiotropic factor produced primarily by activated T cells that can stimulate the proliferation and differentiation of pluripotent hematopoietic stem cells as well as various lineage committed progenitors. In addition, IL3 also affects the functional activity of mature mast cells, basophils, eosinophils and macrophages. Because of its multiple functions and targets, it was originally studied under different names, including mast cell growth factor, P-cell stimulating factor, burst promoting activity, multicolony stimulating factor, thy-1 inducing factor and WEHI-3 growth factor.

In addition to activated T cells, other cell types can also produce IL3, such as human thymic epithelial cells, activated murine mast cells, murine keratinocytes and neurons/astrocytes. At the amino acid sequence level, mature human and murine IL3 share only 29% sequence identity. Consistent with this lack of homology, IL3 activity is highly species-specific and human IL3 does not show activity on murine cells.

Interleukin-3 (IL3) is an interleukin which is a type of biological signal (cytokine) encoded by the IL3 gene located on chromosome 5, and produced primarily by activated T-cells, human thymic epithelial cells, activated murine mast cells, murine keratinocytes and murine neurons/astrocytes. The protein acts in hematopoiesis by controlling the production, differentiation and function of two related white cell populations in the blood: the granulocytes and the monocytes/macrophages. The rhesus macaque IL3 reported to be a monomer, as it is known, contains 124 amino acid residues, which make up a single nonglycosylated polypeptide. However, recombinant rhesus macaque, human and murine IL3 share low homology.

The human interleukin-31 (IL31) gene is located on chromosome 12, and is regulated so that IL31 is expressed in low levels in type 2 helper T-cells, which exist in the testis, bone marrow, skeletal muscle, kidney, colon, thymus, small intestine and trachea. IL31 shares several structural and functional characteristics with IL6, oncostatin M, leukemia inhibitory factor (LIF), and cardiotrophin-1. IL31 signals through the IL31 receptor A and oncostatin M receptor subunits. IL31 can also activate STAT3 through receptors and may be involved in skin immunity. Its use of regulating immune responses have been implicated in skin physiology and inflammatory skin diseases. IL31 may play a role in allergic diseases or disorders such as bronchial inflammation and asthma. Human IL31 shares 24% amino acid sequence homology with the mature mouse IL31.

IL33, encoded by the IL33 gene located on chromosome 9 in humans, is a pro-inflammatory protein belonging to the IL1 superfamily, but shares less than 20% amino acid sequence identity with other members. The mature IL33 protein has a 52-58% amino acid sequence identity with mouse and rat IL33. IL33 is secreted at high levels by high endothelial venules, which can be found in the tonsils, Peyer's patches and mesenteric lymph nodes, but not in the placenta. IL33 is upregulated in arterial smooth muscle, dermal fibroblasts, and keratinocytes following IL1G or IL1H stimulation. IL33 elicits its biological effects by interacting with IL1RL1/ST2, which in turn recruits MYD88, IRAK1, IRAK4, and TRAF6. This is then followed by the phosphorylation of MAPK3/ERK1 and/or MAPK1/ERK2, MAPK14, and MAPK8.

Interleukin-33 (IL33) is a pro-inflammatory protein that shares structural and functional characteristics with the IL1 cytokine family. It binds and signals through the IL1RL1/ST2 receptor, activating NF-κB and MAP kinases. IL33 induces production of T-helper-2 (Th2) cell related cytokines, including IL4, IL5 and IL13, and exerts multiple inflammation-related bioactivities. It has also been reported that after addition of IL33, the levels of interferon gamma (IFNG) were reduced in polarized mouse Th1 cells.

Interleukin-33 (IL33), also known as NF-HEV and DVS 27, is a cytokine belonging to the IL1 superfamily. IL33 is a pro-inflammatory protein that may regulate gene transcription and induce helper T-cells, mast cells, eosinophils and basophils to produce type 2 cytokines. The induction of type 2 cytokines by IL33 in vivo is believed to induce the severe pathological changes observed in mucosal organs following administration of IL33. IL33 is constitutively expressed in smooth muscle and airway epithelia, and it binds to a high-affinity receptor family member ST2. In vivo administration of mature IL33 promotes increased production of IL5, IL13, IgE and IgA, as well as splenomegaly and inflammatory infiltration of mucosal tissues.