DR4 (Death Receptor 4, also known as TRAIL receptor 1 or TNFRSF10A).
DR4 is one of the main receptors for TRAIL (TNF-related apoptosis-inducing ligand).
• Upon TRAIL binding, DR4 can trigger the extrinsic apoptotic pathway, leading to caspase activation and programmed cell death.
Lower receptor levels often correlate with therapy resistance and aggressive tumor phenotypes, while appropriate or higher levels may enhance susceptibility to apoptosis-based therapies.
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