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Interleukins (ILs) are a group of cytokines (secreted proteins and signal molecules) that are expressed and secreted by white blood cells (leukocytes) as well as some other body cells. The human genome encodes more than 50 interleukins and related proteins.
There is a third ligand of this receptor – the Interleukin 1 receptor antagonist (IL-1Ra), which does not activate downstream signaling, so it acts as an inhibitor of IL-1α and IL-1β signaling by competing with them for binding sites of the receptor. [5] [17]
I. Interleukin 1-alpha; Interleukin 1 beta; Interleukin 2; Interleukin 3; Interleukin 4; Interleukin 5; Interleukin 6; Interleukin 7; Interleukin 9; Interleukin 10
16183 Ensembl ENSG00000109471 ENSMUSG00000027720 UniProt P60568 P04351 RefSeq (mRNA) NM_000586 NM_008366 RefSeq (protein) NP_000577 NP_032392 Location (UCSC) Chr 4: 122.45 – 122.46 Mb Chr 3: 37.17 – 37.18 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Interleukin-2 (IL-2) is an interleukin, which is a type of cytokine signaling molecule forming part of the immune system. It is a ...
Hence, there is an interest in developing anti-IL-6 agents as therapy against many of these diseases. [58] [59] The first such is tocilizumab, which has been approved for rheumatoid arthritis, [60] Castleman's disease [61] and systemic juvenile idiopathic arthritis. [62] Others are in clinical trials. [63]
Interleukin 4 has many biological roles, including the stimulation of activated B cell and T cell proliferation, and the differentiation of B cells into plasma cells. It is a key regulator in humoral and adaptive immunity. IL-4 induces B cell class switching to IgE, and up-regulates MHC class II production.
Interleukin-1 alpha (IL-1 alpha) also known as hematopoietin 1 is a cytokine of the interleukin 1 family that in humans is encoded by the IL1A gene. [5] [6] In general, Interleukin 1 is responsible for the production of inflammation, as well as the promotion of fever and sepsis.
Interleukin 9, also known as IL-9, is a pleiotropic cytokine (cell signalling molecule) belonging to the group of interleukins. [5] IL-9 is produced by variety of cells like mast cells, NKT cells, Th2, Th17, Treg, ILC2, and Th9 cells in different amounts. Among them, Th9 cells are regarded as the major CD4+ T cells that produce IL-9. [6]