OX40L, Soluble (TNFSF4) Active Protein

The protein encoded by this gene is a cytokine that belongs to the tumor necrosis factor (TNF) ligand family. This cytokine is a ligand for receptor TNFRSF4/OX4. It is found to be involved in T cell antigen-presenting cell (APC) interactions. In surface Ig- and CD40-stimulated B cells, this cytokine along with CD70 has been shown to provide CD28-independent costimulatory signals to T cells. This protein and its receptor are reported to directly mediate adhesion of activated T cells to vascular endothelial cells. [provided by RefSeq, Jul 2008]

TNFSF4: Cytokine that binds to TNFRSF4. Co-stimulates T-cell proliferation and cytokine production. Genetic variations in TNFSF4 influence susceptibility to systemic lupus erythematosus (SLE). SLE is a chronic, inflammatory and often febrile multisystemic disorder of connective tissue. It affects principally the skin, joints, kidneys and serosal membranes. It is thought to represent a failure of the regulatory mechanisms of the autoimmune system. The upstream region of TNFSF4 contains a single risk haplotype for SLE, which is correlated with increased expression of both cell-surface TNFSF4 and TNFSF4 transcripts. Increased levels of TNFSF4 are thought to augment T-cell-APC interaction and the functional consequences of T-cell activation, thereby destabilizing peripheral tolerance. Belongs to the tumor necrosis factor family.

Protein type: Membrane protein, integral; Cell cycle regulation; Cytokine

Chromosomal Location of Human Ortholog: 1q25

Cellular Component: extracellular space; cell surface; integral to plasma membrane

Molecular Function: cytokine activity; tumor necrosis factor receptor superfamily binding; tumor necrosis factor receptor binding; receptor binding

Biological Process: negative regulation of T-helper 1 cell differentiation; positive regulation of interleukin-12 production; negative regulation of cytokine secretion; positive regulation of T cell cytokine production; positive regulation of activated T cell proliferation; signal transduction; defense response to nematode; positive regulation of interleukin-10 production; T cell proliferation; positive regulation of interleukin-4 production; regulation of adaptive immune response; positive regulation of T-helper 2 cell differentiation; negative regulation of regulatory T cell differentiation; negative regulation of interferon-gamma production; positive regulation of cell proliferation; positive regulation of interleukin-13 production; positive regulation of memory T cell differentiation; cholesterol metabolic process; positive regulation of T-helper 2 type immune response; response to virus; negative regulation of transcription factor activity; positive regulation of immunoglobulin mediated immune response; positive regulation of interleukin-6 production; positive regulation of immunoglobulin secretion; positive regulation of CD4-positive, alpha beta T cell differentiation; positive regulation of interferon-gamma production; negative regulation of interleukin-17 production; positive regulation of B cell activation; regulation of inflammatory response; positive regulation of interleukin-2 production; immune response; positive regulation of alpha-beta T cell proliferation; negative regulation of transcription, DNA-dependent; acute inflammatory response; positive regulation of inflammatory response

Disease: Myocardial Infarction, Susceptibility To