Rat CD70 Antigen / TNFSF7 (CD70) Protein

Background

CD70, also known as TNFSF7 (Tumor Necrosis Factor Superfamily Member 7), is a transmembrane glycoprotein that belongs to the tumor necrosis factor (TNF) ligand superfamily. It is primarily expressed on the surface of activated immune cells, including T cells, B cells, dendritic cells (DCs), and natural killer (NK) cells. The expression of CD70 is tightly regulated and is typically transient, occurring upon immune cell activation, particularly during the adaptive immune response. CD70 plays a crucial role in immune cell interactions, contributing to T cell proliferation, differentiation, and the development of memory T cells. CD70 exerts its effects by binding to its receptor, CD27, which is a member of the TNF receptor superfamily. CD27 is constitutively expressed on naïve T cells, memory T cells, and NK cells, and its interaction with CD70 initiates intracellular signaling pathways that enhance immune activation and memory formation. This CD70-CD27 interaction is critical for effective immune responses, particularly during viral infections, tumor immunity, and in the context of autoimmune diseases.