Tumor necrosis factor receptor–tumor necrosis factor alpha complex (TNF-TNFR complex)

The tumor necrosis factor receptor–tumor necrosis factor alpha complex is the functional signaling unit formed by the binding of the homotrimeric cytokine TNF-alpha to its cognate receptors, TNFR1 (p55) or TNFR2 (p75). This interaction is a central driver of the inflammatory response, mediating pleiotropic effects such as cell proliferation, survival, and programmed cell death (apoptosis and necroptosis) through the activation of pathways like NF-κB and MAPK. Dysregulation or overproduction of TNF-alpha leads to chronic inflammation and tissue destruction, which are hallmarks of various autoimmune and inflammatory diseases, including rheumatoid arthritis, Crohn's disease, and psoriasis. Therapeutic intervention typically involves the use of monoclonal antibodies or soluble receptor fusion proteins that bind to TNF-alpha, thereby preventing the formation of the active complex and neutralizing its downstream pathological effects. While highly effective, targeting this complex carries risks such as increased susceptibility to opportunistic infections and potential development of malignancies.

Other names

TNF-alpha/TNFR complexTNF-TNFR complexTNF-alpha-TNFR1 complexTNF-alpha-TNFR2 complexTumor necrosis factor-alpha receptor complex

Neutralization of the TNF-alpha ligand or blockade of the receptor to prevent the formation of the active signaling complex.