Invitrogen™ CD47 Monoclonal Antibody (MEM-122)

CD47, known as integrin-associated protein (IAP), is a glycosylated transmembrane glycoprotein with five domains, expressed widely across hematopoietic cells like T and B cells, monocytes, platelets, and erythrocytes, as well as non-hematopoietic cells. It interacts with integrins such as CD51/CD61 and CD41/CD61, and serves as a receptor for thrombospondin, mediating bi-directional signaling that affects neural synaptic activity and macrophage phagocytosis. CD47 acts as a ligand for CD172a (SIRP alpha), an inhibitory receptor on macrophages, preventing phagocytosis of CD47-positive cells. This interaction influences cell migration, B cell adhesion, T cell activation, and neuronal development, particularly in synapse-rich brain and retina regions. It also modulates chondrocyte responses to mechanical signals. T cell expression of CD47 can lead to activation or apoptosis in the presence of thrombospondin. Monoclonal antibody stimulation of CD47 has been shown to induce CD4+CD25- suppressive activity and increase Foxp3 expression. CD47's role in membrane transport, signal transduction, and its broad tissue distribution highlight its significance in various physiological processes.