Tumor cell apoptosis signaling pathways

“Tumor cell apoptosis signaling pathways” encompasses the diverse molecular and cellular processes that regulate programmed cell death in cancer cells. The two main canonical pathways are: Extrinsic pathway: Initiated by the binding of death ligands (e.g., Fas ligand, TRAIL, TNFα) to cell-surface death receptors (Fas, TNFR1, DR4/5), leading to formation of a death-inducing signaling complex (DISC) and activation of initiator caspases (caspase-8, -10). Intrinsic pathway: Mediated by mitochondrial signals and regulated by the Bcl-2 family of proteins. Cellular stress (DNA damage, oxidative stress) releases cytochrome c from mitochondria, which forms the apoptosome, activating caspase-9 and executing apoptosis. Major regulators include p53 (a tumor suppressor transcription factor), which controls both apoptotic pathways, influencing cell fate in response to stress or damage. Therapeutic targeting of apoptotic signaling pathways in cancer aims to restore or enhance apoptosis in malignant cells resistant to programmed cell death. Summary: The entry “Tumor cell apoptosis signaling pathways” is not a specific, canonical molecular target but rather a functional biological concept involving numerous molecules (receptors, enzymes, transcription factors). For structured data, consider extracting and focusing on individual canonical targets within these pathways (e.g., “Tumor necrosis factor receptor 1”, “Fas”, “Death receptor 4/5”, “Bcl-2”, “Caspase-8”, “p53”).

Other names

Apoptotic signaling pathways in tumor cellsCancer cell apoptosis pathwaysCell death signaling cascades in cancer

Induction of apoptosis via extrinsic (death receptor) pathway; Modulation of intrinsic (mitochondrial) pathway, e.g., targeting Bcl-2 family proteins; Activating p53-dependent cell death response; Direct or indirect caspase activation