Gene set analysis suggested up-regulation of a variety of pr......
Gene set analysis suggested up-regulation of a variety of pro- and anti-inflammatory cytokines, including interleukin 1alpha (IL-1alpha), IL-2, IL-3, IL-5, IL-8, IL-9, IL-10, IL-12A, IL-13, IL-15, IL-18, interferon gamma (IFNgamma), and lymphotoxin alpha (TNF superfamily member 1).More...
Positive relationships between IL5 and other components at different levels (count: 0)
Positive relationship network of IL5 in MK4MDD
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Cell and Molecular Pathway
Neural System
Cognition and Behavior
Symptoms and Signs
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MDD
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Negative relationships between IL5 and MDD (count: 0)
Negative relationships between IL5 and other components at different levels (count: 0)
Activation of T lymphocytes is a key event for an efficient ......
Activation of T lymphocytes is a key event for an efficient response of the immune system. It requires the involvement of the T-cell receptor (TCR) as well as costimulatory molecules such as CD28. Engagement of these receptors through the interaction with a foreign antigen associated with major histocompatibility complex molecules and CD28 counter-receptors B7.1/B7.2, respectively, results in a series of signaling cascades. These cascades comprise an array of protein-tyrosine kinases, phosphatases, GTP-binding proteins and adaptor proteins that regulate generic and specialised functions, leading to T-cell proliferation, cytokine production and differentiation into effector cells.More...
After transplantation of organ allografts, there are two pat......
After transplantation of organ allografts, there are two pathways of antigen presentation. In the direct pathway, recipient T cells react to intact allogeneic MHC molecules expressed on the surface of donor cells. This pathway would activate host CD4 or CD8 T cells. In contrast, donor MHC molecules (and all other proteins) shed from the graft can be taken up by host APCs and presented to recipient T cells in the context of self-MHC molecules - the indirect pathway. Such presentation activates predominantly CD4 T cells. A direct cytotoxic T-cell attack on graft cells can be made only by T cells that recognize the graft MHC molecules directly. Nontheless, T cells with indirect allospecificity can contribute to graft rejection by activating macrophages, which cause tissue injury and fibrosis, and are also likely to be important in the development of an alloantibody response to graft.More...
Blood-cell development progresses from a hematopoietic stem ......
Blood-cell development progresses from a hematopoietic stem cell (HSC), which can undergo either self-renewal or differentiation into a multilineage committed progenitor cell: a common lymphoid progenitor (CLP) or a common myeloid progenitor (CMP). A CLP gives rise to the lymphoid lineage of white blood cells or leukocytes-the natural killer (NK) cells and the T and B lymphocytes. A CMP gives rise to the myeloid lineage, which comprises the rest of the leukocytes, the erythrocytes (red blood cells), and the megakaryocytes that produce platelets important in blood clotting. Cells undergoing these differentiation process express a stage- and lineage-specific set of surface markers. Therefore cellular stages are identified by the specific expression patterns of these genes.More...
The intestine is the largest lymphoid tissue in the body. On......
The intestine is the largest lymphoid tissue in the body. One striking feature of intestinal immunity is its ability to generate great amounts of noninflammatory immunoglobulin A (IgA) antibodies that serve as the first line of defense against microorganisms. The basic map of IgA production includes induction of mucosal B cells in the Peyer's patches, circulation through the bloodstream and homing to intestinal mucosa of IgA-commited plasma cells, and local antibody production for export across the intestinal membranes. Multiple cytokines, including TGF-{beta}, IL-10, IL-4, IL-5, and IL-6, are required to promote IgA class switching and terminal differentiation process of the B cells. Secreted IgA promotes immune exclusion by entrapping dietary antigens and microorganisms in the mucus and functions for neutralization of toxins and pathogenic microbes.More...
The classification of autoimmune throid disease (AITD) inclu......
The classification of autoimmune throid disease (AITD) includes Hashimoto's thyroiditis (HT) or chronic autoimmune thyroiditis and its variants, Graves' disease (GD) and autoimmune atrophic thyroiditis or primary myxedema. HT is characterized by the presence of goitre, thyroid autoantibodies against thyroid peroxidase (TPO) and thyroglobulin (Tg) in serum and varying degrees of thyroid dysfunction. During HT, self-reactive CD4+ T lymphocytes (Th) recruit B cells and CD8+ T cells (CTL) into the thyroid. Disease progression leads to the death of thyroid cells and hypothyroidism. Both autoantibodies and thyroid-specific cytotoxic T lymphocytes (CTLs) have been proposed to be responsible for autoimmune thyrocyte depletion. In GD, the TSH-R is the most important autoantigen. Antibodies directed against it mimic the effects of the hormone on thyroid cells, TSH, stimulating autonomous production of thyroxine and triiodothyronine and causing hyperthyroidism. The presence of TSH-R-blocking antibodies that bind the TSH receptor in a similar fashion to the antibodies in patients with Graves' disease but that block rather than activate the receptor explains some cases of atrophic hypothyroidism.More...
The Janus kinase/signal transducers and activators of transc......
The Janus kinase/signal transducers and activators of transcription (JAK/STAT) pathway is one of a handful of pleiotropic cascades used to transduce a multitude of signals for development and homeostasis in animals, from humans to flies. In mammals, the JAK/STAT pathway is the principal signaling mechanism for a wide array of cytokines and growth factors. Following the binding of cytokines to their cognate receptor, STATs are activated by members of the JAK family of tyrosine kinases. Once activated, they dimerize and translocate to the nucleus and modulate the expression of target genes. In addition to the activation of STATs, JAKs mediate the recruitment of other molecules such as the MAP kinases, PI3 kinase etc. These molecules process downstream signals via the Ras-Raf-MAP kinase and PI3 kinase pathways which results in the activation of additional transcription factors.More...
Cytokines are soluble extracellular proteins or glycoprotein......
Cytokines are soluble extracellular proteins or glycoproteins that are crucial intercellular regulators and mobilizers of cells engaged in innate as well as adaptive inflammatory host defenses, cell growth, differentiation, cell death, angiogenesis, and development and repair processes aimed at the restoration of homeostasis. Cytokines are released by various cells in the body, usually in response to an activating stimulus, and they induce responses through binding to specific receptors on the cell surface of target cells. Cytokines can be grouped by structure into different families and their receptors can likewise be grouped.More...
Fc epsilon RI-mediated signaling pathways in mast cells are ......
Fc epsilon RI-mediated signaling pathways in mast cells are initiated by the interaction of antigen (Ag) with IgE bound to the extracellular domain of the alpha chain of Fc epsilon RI. The activation pathways are regulated both positively and negatively by the interactions of numerous signaling molecules. Mast cells that are thus activated release preformed granules which contain biogenic amines (especially histamines) and proteoglycans (especially heparin). The activation of phospholipase A2 causes the release of membrane lipids followed by development of lipid mediators such as leukotrienes (LTC4, LTD4 and LTE4) and prostaglandins (especially PDG2). There is also secretion of cytokines, the most important of which are TNF-alpha, IL-4 and IL-5. These mediators and cytokines contribute to inflammatory responses.More...
Inhaled allergens encounter antigen presenting cells (APC) t......
Inhaled allergens encounter antigen presenting cells (APC) that line the airway. Upon recognition of the antigen and activation by APC, naive T cells differentiate into TH2 cells, a process that is promoted by interleukin 4 (IL-4). Activated TH2 cells stimulate B cells to produce IgE antibodies in response to IL-4 and IL-13. IgE binds the high affinity IgE receptor at the surface of mast cells, the proliferation and differentiation of which is promoted by IL-9.The crosslinking of mast-cell-bound IgE by allergens leads to the release of biologically active mediators (histamine, leukotrienes) by means of degranulation and, so, to the immediate symptoms of allergy. Activated mast cells and Th2 cells also induce the production of IL-5. IL-5 travels to the bone marrow and regulates the differentiation and egress of eosinophils from the bone marrow into the blood. Moreover activated mast cells and Th2 cells in the lung generate the cytokines interleukin IL-4, IL-13 and tumour necrosis factor (TNF)-alpha. These cytokines stimulate the generation of eotaxin by lung epithelial cells, fibroblasts and smooth muscle cells. Eotaxin then stimulates the selective recruitment of eosinophils from the airway microvessels into the lung tissue. The activation of eosinophils leads to release of toxic granules and oxygen free radicals that lead to tissue damage and promote the development of chronic inflammation.More...
Selective expression of chemokine receptors during T-cell polarization
Chemokine receptors expressed by T helper cells help recruit......
Chemokine receptors expressed by T helper cells help recruit cells to specific locations based on their chemoattractant ligands. The polarization of T cells into Th1 and Th2 cells is associated with their expression of different subsets of chemokine receptors. Naive CD4 positive cells that have not been exposed to antigen express CXCR4 and CCR7. The most abundant chemokine receptors on Th1 cells involved in the cellular immune response to microbial agents include CXCR3, CCR1, CCR2 and CCR5, while Th2 cells express CCR2, CCR3 and CCR5. An additional class of T cells termed semi-nave cells may be induced by TGF-beta to express yet another class of chemokine receptors, CCR4 and CCR7. Although the expression of chemokine receptors in different cells is preferred in these cases, it is not absolute or exclusive, and there is overlap in expression between Th1 and Th2 cells. Although CCR7 positive cells have been reported to lack effector action, not be polarized, and to home only to lymphoid tissues, other studies have found CCR7 positive Th1 and Th2 cells and have identified CCR7 positive cells in non-lymphoid tissues. CCR4 appears associated with homing of lymphocytes to the skin, and CCR9 is associated with homing to the small intestine, while other chemokines like CXCR3 and CCR5 are associated with homing toward inflamed tissues more broadly. The expression of different chemokine receptors by subsets of T helper cells plays an important role in the migration and homing of these cells in tissues, and targeting of the immune response to specific cells.More...
Dendritic cells in regulating TH1 and TH2 Development
While T cells and B cells carry out the actions of antigen-s......
While T cells and B cells carry out the actions of antigen-specific immune responses, antigen-presenting cells called dendritic cells are required for this to happen. The name of dendritic cells is based on their shape, with activated dendritic cells displaying long processes on their surface. When immature dendritic cells found throughout the body internalize and present antigen, they express markers that stimulate the activation of lymphocytes, and migrate to lymphocyte rich tissues like the spleen and lymph nodes to initiate immune responses. In addition to stimulating responses against antigens, dendritic cells also produce tolerance to self antigens. Dendritic cells can be derived from either myeloid or lymphoid lineages. Monocyte derived lineages (pDC1) stimulate Th1 cell differentiation while plasmacytoid (lymphoid) dendritic cells (pDC2) induce Th2 cell differentiation. Factors that stimulate the maturation of monocytes derived dendritic cells include GM-CSF, and IL-4. IL-3 stimulates the differentiation of pDC2 cells into DC2 cells. A variety of factors are involved in antigen-recognition and processing by immature dendritic cells and in the maturation of these cells. The transition to mature dendritic cells down-regulates the factors involved in antigen internalization, and increases the expression of MHC, costimulatory molecules involved in lymphocyte activation, adhesion molecules, and specific cytokines and chemokines. Toll-like receptors on the surface of immature dendritic cells recognize microbial components to induce dendritic cell maturation. In addition to stimulating B cell responses, dendritic cells are potent activators of T cells. IL-12 secretion by dendritic cells stimulates T cell responses, particularly differentiation of Th1 cells that produce interferon-gamma and other pro-inflammatory cytokines. While IL-4 generally stimulates Th2 differentiation, the stimulation of Th2 cell formation by DC2 cells does not appear to involve IL-4. The stimulation of Th1 and Th2 cell formation by dendritic cells appears to be balanced by counter-regulation of each pathway by the other. Interferon-gamma produced by Th1 cells blocks the further stimulation of Th1 differentiation by DC1 cells. The IL-4 produced by Th2 cells kills dendritic cell precursors that contribute to Th2 cell creation. Direct interactions between T cells and dendritic cells are enhanced through the expression of adhesion molecules and costimulatory receptors CD80 and CD86 expressed by mature dendritic cells activate T cells in concert with the recognition of antigen/MHC by the T cell receptor. The central role of dendritic cells as modulators of immune responses makes them an important focus of studies about autoimmune disease, transplant rejection, allergies, responses to infections, and other alterations of the immune response.More...
Inflammation is a protective response to infection by the im......
Inflammation is a protective response to infection by the immune system that requires communication between different classes of immune cells to coordinate their actions. Acute inflammation is an important part of the immune response, but chronic inappropriate inflammation can lead to destruction of tissues in autoimmune disorders and perhaps neurodegenerative or cardiovascular disease. Secreted cytokine proteins provide signals between immune cells to coordinate the inflammatory response. Some cytokines such as IL-1, IL-6 and TNF act to broadly provoke the inflammatory response while others act on specific types of immune cells. Macrophages and other phagocytotic cells provide a front-line defense against bacterial infection. Macrophages stimulate the inflammatory responses of neutrophils, fibroblasts, and endothelial cells in response infection by secreting IL-1 and TNF. IL-1 and TNF cause fever through alteration of the body temperature set-point in the hypothalamus. Fibroblasts and endothelial cells respond to IL-1 and TNF by recruiting more immune cells to the site of inflammation. Secreted IL-8 is a chemokine that attracts neutrophils to sites of infection. Macrophages also present antigen to T helper cells that play a central role in coordinating immune responses. T helper cells induce clonal expansion of T cells that respond to antigen, with IL-2 as a key mediator of T cell proliferation and activation. TGF-beta is a negative regulator of proliferation in many cells, have anti-inflammatory actions in some settings. The cytotoxic activity of Natural Killer cells (NK cells) and lymphokine activated killer cells (LAK cells) toward viral infected or tumor cells is stimulated by IL-2 and other cytokines. T helpers secrete IL-3 and IL-5 to stimulate eosinophil proliferation and activation. Eosinophils are involved in the immune response to parasitic infection. T helper cells are required to stimulate B cell responses as well, with the cytokines IL-10, IL-4 and other cytokines regulating the clonal selection and differentiation of antigen-specific B cells to form antibody-secreting plasma B cells and memory cells. In addition to inducing activation and proliferation of specific differentiated immune cells, cytokines act on hematopoeitic stem cells, causing their proliferation and differentiation into the full range of immune cells.More...
GATA3 participate in activating the Th2 cytokine genes expression
CD4+ helper T cells differentiate into distinct subtypes, Th......
CD4+ helper T cells differentiate into distinct subtypes, Th1 and Th2 cells. Th2 cells are involved in the response to extracellular helminthe parasites and allergic responses and secrete a distinct set of cytokines including IL-4, IL-5 and IL-13. The development and differentiation of T cells is influenced by many factors, including transcription factors such as GATA-3, a transcription factor associated with induction of Th2 cells. Factors that increase cAMP levels in Th2 cells activate p38 kinase, which phosphorylates and activates GATA-3 independently of PKA. Cells expressing GATA-3 develop the profile of Th2 cells, secreting IL-4, IL-5 and IL-13. These cytokines are found in a gene cluster together and are regulated coordinately by GATA-3. Binding of GATA-3 in the regulatory regions of these genes alters chromatin structure, increasing accessibility to other transcription factors. Activation of the T cell receptor through interaction with antigen on antigen presenting cells activates NFAT and other transcription factors that cooperate with GATA-3 in inducing Th2 cell differentiation. Dominant negative GATA-3 can repress the secretion of these cytokines and block the airway inflammation that causes asthma. Blocking GATA-3 action such as through antisense treatment has been suggested as a therapeutic strategy to treat asthma. GATA-3 has also been implicated in developmental processes such as the development of the inner ear.More...
The process of hematopoesis is regulated by various cytokine......
The process of hematopoesis is regulated by various cytokines. The combination of cytokines stimulates the proliferation and/or differentiation of the various hematopoietic cell types. Bone marrow stromal cells are the major source of hematopoietic cytokines in the non-infecteous state. In the presence of infection, cytokines produced by activated macrophages and TH cells induce hematopoietic activity. The induction by cytokines results in rapid expansion of the population of white blood cells to fight infection. The specific cytokines that affect a step of cell differentiation are placed adjacent to the arrow representing that step. Lines with ? indicate likely, but still hypothetical pathways.More...
Several different cell types coordinate their efforts as par......
Several different cell types coordinate their efforts as part of the immune system, including B cells, T cells, macrophages, neutrophils, basophils and eosinophils. Each of these cell types has a distinct role in the immune system, and communicates with other immune cells using secreted factors called cytokines, including interleukins, TNF, and the interferons. Macrophages phagocytose foreign bodies and are antigen-presenting cells, using cytokines to stimulate specific antigen dependent responses by B and T cells and non-specific responses by other cell types. T cells secrete a variety of factors to coordinate and stimulate immune responses to specific antigen, such as the role of helper T cells in B cell activation in response to antigen. The proliferation and activation of eosinophils, neutrophils and basophils respond to cytokines as well. Cytokine communication is often local, within a tissue or between cells in close proximity. Each of the cytokines is secreted by one set of cells and provokes a response in another target set of cells, often including the cell that secretes the cytokine. Some cytokines, like IL-1, interferons and TNF, stimulate a broad inflammatory response in response to infection or injury. Other cytokines have more specific functions such the following examples. IL-2 stimulates the proliferation and activation of B and T cells. IL-4 plays a role in the differentiation of Th2 cells, in allergic responses, and in the switching of antibody types. IL-5 stimulates the production and maturation of eosinophils during inflammation. IL-8 is a chemokine, a chemotactic factor that attracts neutrophils, basophils and T cells to sites of inflammation. IL-12 and IL-18 are involved in helper T cell differentiation. IL-10 apparently acts to repress secretion of proinflammatory cytokines. The complex interplay of these different cytokine functions with immune cells is essential for correct immune function.More...
IL-5 is an inflammatory signaling molecule that primarily st......
IL-5 is an inflammatory signaling molecule that primarily stimulates eosinophil proliferation, maturation and activation. Eosinophils are leukocytes involved in inflammatory responses that defend against parasites and cause some aspects of asthma, allergic reactions, and perhaps autoimmune disorders. The action of IL-5 begins with an immune response in tissues, such as activation of macrophages and T cells that secrete IL-1, IL-4 and IL-6. The immune response can lead to IL-5 secretion by T cells, eosinophils and mast cells. Secreted IL-5 stimulates production and maturation of eosinophils in bone marrow that migrate to tissues in response to eotaxin and release factors that damage tissues, causing some of the undesirable consequences of inflammation. The receptor for IL-5 is a heterodimer of an alpha subunit that is required for IL-5 selective binding and a beta subunit that is also part of the IL-3 and GM-CSF receptors. Binding of IL-5 to the IL-5 receptor at the cell surface activates JAK/STAT signaling pathways that regulate transcription, proliferation, and differentiation.More...
IL5 related Reactome pathways (count: 0)
IL5 related interactors from protein-protein interaction data in HPRD (count: 2)
Basic Information
Positive relationships between IL5 and other components at different levels (count: 0)
