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Related to IL-15: IL-7, Il-17, Il-18


A gene on chromosome 4q31 that encodes interleukin-15, a cytokine which regulates T and natural killer cell activation and proliferation. IL15 shares many biological activities with IL-2: they both bind common haematopoietin receptor subunits and may compete for the same receptor, thus having a ying-yang relationship with each other. IL15 activates JAK kinases, as well as the phosphorylation and activation of transcription activators STAT3, STAT5 and STAT6.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.




A type of cytokine that enables communication among leukocytes and other cells active in inflammation or the specific immune response. The result is a maximized response to a microorganism or other foreign antigen. See: cell-mediated immunity; cytokine; inflammation


Abbreviation: IL-1
A cytokine released by almost all nucleated cells that activates the growth and function of neutrophils, lymphocytes, and macrophages; promotes the release of additional mediators that influence immune responses; enhances production of cerebrospinal fluid; and modulates certain adrenal, hepatic, bone, and vascular smooth muscle cell activity. Interleukin-1 and tumor necrosis factors, whose actions are almost identical to those of IL-1, are involved in fever production and other systemic effects of inflammation. See: tumor necrosis factor


Abbreviation: IL-1-ß
A protein released by activated macrophages that stimulates B cells and thymocytes to proliferate and mature and increases the secretion of interleukin 2. It is found in high levels in the blood of patients with septic shock and in the cerebrospinal fluid of patients with meningitis.
Synonym: catabolin


Abbreviation: IL-2
A cytokine released primarily by activated CD4+ helper T lymphocytes. It is a major mediator of T cell proliferation, promotes production of other cytokines, enhances natural killer cell function, and is a cofactor for immunoglobulin secretion. Synonym: T-cell growth factor


Abbreviation: IL-3
A cytokine produced by activated T cells that promotes proliferation of bone marrow stem cells.
Synonym: mast cell growth factor; multi-colony stimulating factor


Abbreviation: IL-4
A cytokine released by activated T cells and mast cells that stimulates B and T lymphocyte production and activity, prevents macrophages from releasing monokines, and promotes mast cell, immunoglobulin E, and eosinophil activity.
Synonym: B cell growth factor; mast cell growth factor II; T-cell growth factor II


Abbreviation: IL-5
A cytokine produced by T cells, eosinophils and mast cells that acts as the primary stimulant for eosinophil production. Synonym: eosinophil colony-stimulating factor; eosinophil differentiation factor See: basophil(e); eosinophil


Abbreviation: IL-6
A lymphokine produced by many cell types, including mononuclear phagocytes, T cells, and endothelial cells. It mediates the acute phase response, enhances B cell production and differentiation to immunoglobulin-secreting plasma cells, and stimulates megakaryocyte production. Synonym: B cell stimulatory factor II; hepatocyte stimulatory factor See: acute phase reaction; lymphokine


Abbreviation: IL-7
A cytokine produced by the thymus, spleen, and bone marrow stromal cells. It stimulates growth of B-cell precursors, development of thymocytes, and activity of cytotoxic T-cells.
Synonym: lymphopoietin 1; pre-B cell growth factor


Abbreviation: IL-8
A cytokine produced by many cell types. It acts as a neutrophil chemoattractant.


Abbreviation: IL-9
A cytokine produced by T cells. Among other functions, it promotes the proliferation and multiplication of mast cells.


Abbreviation: IL-10
A cytokine derived from mononuclear phagocytes, T cells, and keratinocytes. It inhibits cytokine synthesis by macrophages, T cells, and natural killer cells, and enhances B cell growth and secretion of immunoglobulin.


Abbreviation: IL-11
A cytokine produced by bone marrow stromal cells. It mediates acute phase protein synthesis, enhances B cell growth and differentiation to plasma cells, and promotes megakaryocyte production.
Synonym: plasmocytoma stimulating factor


Abbreviation: IL-12
A cytokine produced by mononuclear phagocytes and B cells. It induces interferon gamma production from T cells and natural killer cells, and enhances T cell and natural killer cell cytotoxicity.
Synonym: natural killer cell stimulating factor


Abbreviation: IL-13
A cytokine produced by T cells. It induces major histocompatibility class II expression on mononuclear phagocytes and B cells, B cell proliferation, and immunoglobulin production.


Abbreviation: IL-14
A cytokine produced by T lymphocytes and follicular dendritic cells. It stimulates proliferation of activated B lymphocytes and inhibits immunoglobulin secretion from activated B lymphocytes.


Abbreviation: IL-15
A cytokine released by epithelial cells in the kidney, skeletal muscle, liver, lungs, heart, and bone marrow, which stimulates production of T cells, esp. cytotoxic T cells and natural killer cells. It can bind with interleukin-2 receptors and mimic IL-2's effects. See: interleukin-2


Abbreviation: IL-16
A cytokine produced by T lymphocytes that stimulates movement of monocytes, CD4+ T cells, and eosinophils to the area. It was previously known as lymphocyte chemoattractant factor.


Abbreviation: IL-17
A cytokine produced by memory T lymphocytes that stimulates the proliferation of T cells and the differentiation of neutrophils.


Abbreviation: IL-18
A cytokine produced by macrophages that stimulates the production of gamma interferon and other chemical mediators that enhance cell-mediated immune responses. It is similar in structure to IL-1.


Abbreviation: IL-15
A cytokine released by epithelial cells in the kidney, skeletal muscle, liver, lungs, heart, and bone marrow, which stimulates production of T cells, esp. cytotoxic T cells and natural killer cells. It can bind with interleukin-2 receptors and mimic IL-2's effects. See: interleukin-2
See also: interleukin
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
This study compared serum IL-15 levels in an ECC and CON emphasized RE model in two groups, athletes and non-athletes.
To verify the results obtained from the microarray experiments, qRT-PCR verification was performed for five genes: chemokine (C-X-C motif) ligand 10 (CXCL-10), interleukin-15 (IL-15), intercellular adhesion molecule 1 (ICAM-1), NLR family CARD domain containing 5 (NLRC-5), and interferon regulatory factor 1 (IRF-1).
According to the findings the difference between IL-15 in serum was not significant between the two groups of continuous and alternative.
Lefrancois, "Cutting edge: the role of IFN-alpha receptor and MyD88 signaling in induction of IL-15 expression in vivo," The Journal of Immunology, vol.
The concentrations of TNF-[alpha], IL-15, IL-10, IL-6, IL-8, IL-4 and IL-1[beta] in serum and nasal cell extracts that had previously been kept at -80 [degrees]C were determined using the Human Luminex bead-based kit with the LINCOplex simultaneous multianalyte detection system (Linco Research, Inc., St.
The accumulation levels of nitrate and nitrite resulting from NO produced by IL-15 stimulated hu-man buccal epithelial cells were measured, as NO is rapidly converted into these two stable end products.18
IL-15 prompts the all-important, infection-fighting T cells to multiply.
Neoleukin's lead product candidate, NL-201, is a combined IL-2 and IL-15 agonist designed to eliminate alpha receptor binding.
SOTIO and Cytune Pharma, members of the PPF Group, have commenced the first dosing of cancer patients with SO-C101, a superagonist fusion protein of interleukin IL-15, it was reported on Friday.
Priming NK cells with controlled exposure to tumor cells - which is the mechanism of action of INKmune - in the patient is potentially more effective against cancer targets with potentially fewer side effects than the administration of cytokines such as IL-2 or IL-15.
The company said it entered into the agreement Genentech to develop and commercialise novel IL-15 cytokine therapeutics, including XmAb 24306, an IL-15/IL-15Ra cytokine complex engineered with Xencor's bispecific Fc domain and Xtend Fc technology.
Levels of human cytokines (IL2, IFN-[gamma], IL-1[beta], TNF-[alpha], IL-6, IL-12p70, IL-15, IL-4, IL-5, IL-13, IL-1Ra, and IL-10) were measured in serum using the Bio-Plex Pro[TM] Human Cytokine 27-Plex Assay kit (Bio-Rad Laboratories Inc., CA, USA; cat.