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TRAIL-R2

Fas - One of pathways toward death

Fas is a member of the tumor necrosis factor (TNF)-receptor superfamily and plays a key role in the physiological regulation of programmed cell death. This receptor contains a death domain which enables the formation of a signaling complex that includes Fas-associated death domain protein (FADD), caspase 8, and caspase 10. The auto-proteolytic processing of these complexed caspases triggers a downstream cascade that leads to membrane-mediated apoptosis.

TRAIL-R2: The Trail Less Traveled

Cells undergo apoptotic programmed cell death in response to various stimuli, and this key mechanism is necessary for cellular morphogenesis, tissue homeostasis, and host defense. Particular cytokines such as tumor necrosis factor (TNF) and the Fas ligand signal through their cooperative death domain-containing receptors tumor necrosis factor receptor 1 (TNFR1) and Fas. Like its cousin TRAIL-R1, TRAIL-R2 is widely expressed in both normal tissues as well as in many types of tumor cells.