IL-7


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Related to IL-7: IL-15, IL-8

IL7

A gene on chromosome 8q12-q13 that encodes interleukin-7, a hematopoietic growth factor which stimulates the proliferation of lymphoid progenitors, including both B and T cells. It forms a heterodimer with hepatocyte growth factor to act as a pre-pro-B-cell growth-stimulating factor. It is also a cofactor for V(D)J rearrangement of the T-cell receptor beta during early T-cell development. IL7 is produced locally by intestinal mucosal cells, and may act as a regulatory factor for intestinal mucosal (GALT) lymphocytes.

interleukin

(in?ter-loo'kin),

IL

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

interleukin-1

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

interleukin-1-beta

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

interleukin-2

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

interleukin-3

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

interleukin-4

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

interleukin-5

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

interleukin-6

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

interleukin-7

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

interleukin-8

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

interleukin-9

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

interleukin-10

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.

interleukin-11

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

interleukin-12

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

interleukin-13

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.

interleukin-14

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.

interleukin-15

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

interleukin-16

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.

interleukin-17

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

interleukin-18

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.

interleukin-7

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
See also: interleukin
References in periodicals archive ?
Reduced Detection of Surface [gamma]c Protein by IL-7 Is Independent of the T Cells MetabolicA ctivity.
Since energy-independent and rapid reduction of [gamma]c surface expression was observed only under IL-7 stimulation through a decrease of immunofluorescence analysis by FACS, we assumed that the epitope recognized by 4G3 may be masked on IL-7 binding but may not actually be regulated.
Among all the cytokines, IL-7 is particularly important, since it is indispensable for the generation of T cells in the thymus and it is critical for T cell homeostasis in the peripheral lymphoid organs [23, 24].
In this study, we showed that the epitope changes of [gamma]c protein, in which at least 3 epitopes are concealed, is rapidly induced by the binding between IL-7 and IL-7 receptor core, and such epitope masking of [gamma]c is reversely induced with IL-7R[alpha] expression.
IL-7 signaling is mainly controlled by the availability of ligands and the expression of surface cytokine receptors [1].
In this study, we totally investigated the association of 6 variants in IL-7 and one variant in IL-7RA with Chinese NMO and MS patients, especially with the NMO-IgG positive patients.
IL-7 belongs to a superfamily of gamma-chain cytokine receptor, and its gene, IL-7 , is located on chromosome 8q12-13.
[sup][22],[23],[24],[36] Some studies revealed that rs6993386, rs1520333, and rs7816065 of IL-7 were associated with MS in Caucasian populations, while rs1545298, rs4739140, and rs2887502 did not relate to this disease.
Previously, we performed a partial replication of the referred studies by assayed rs1520333 of IL-7 and rs6897932 of IL-7RA , however, we did not find any positive association of both SNPs with NMO.
Lastly, functional studies of the IL-7 would be required to understand the actual effect of the IL-7/IL-7R complex in MS and NMO pathogenesis.
Moderately good agreement was found for IL-1[beta], IL-8, IL-13, and MCP-1 in plasma and for IL-6, IL-7, IL-8, IL-10, IL-13, IFN-[gamma], TNF-[alpha], MCP-1, and MIP-1[beta] in serum.
Perhaps more importantly, the low-concentration CV%s were high for IL-7 and IL-8.