Description
The CD134 receptor (OX40) is a member of the tumor necrosis factor receptor (TNF-R) family. CD134 is a type I transmembrane receptor. It contains 3 extracellular cysteine-rich motifs. CD134 is mainly expressed in activated lymphocytes. After interaction with its ligand CD134L (OX40L), CD134 interacts with TNF receptor-associated factor 2 (TRAF2), TRAF5 and mediate activation of nuclear factors NF-kappaB and AP1. CD134-CD134L have been reported to be involved in T cell selection, migration and induction of Th1 and Th2 cytokine pattern. Moreover, it is involved in anti-tumor immunity, cell adhesion and various auto-immune diseases. Historical data has shown that CD134 receptor blocks T cell proliferation induced by CD134L