Cancer Cell Cytoskeleton and Apoptosis Pathway

The "Cancer Cell Cytoskeleton and Apoptosis Pathway" refers collectively to the molecular mechanisms that regulate programmed cell death—apoptosis—in cancer cells. This process involves both intrinsic pathways triggered by internal cellular stress signals such as DNA damage and extrinsic pathways activated by external death ligands binding receptors on the cell surface. Key components include members of the TNF receptor superfamily for extrinsic signaling; pro-apoptotic and anti-apoptotic members of the Bcl-2 protein family for intrinsic mitochondrial control; caspases that execute apoptosis through proteolytic cleavage of cellular substrates; and regulators such as p53. The cytoskeleton is broken down during apoptosis via caspase activity. Apoptosis is critical for eliminating damaged or potentially harmful cells before they can contribute to tumor formation. Dysregulation of this process allows cancer cells to survive despite accumulating mutations, contributing significantly to tumor development and resistance against therapy. Therapeutic strategies targeting these pathways aim at restoring sensitivity towards programmed cell death by inhibiting anti-apoptic factors or mimicking pro-death signals within malignant cells.[1][2][4]

Other names

Apoptotic signaling pathway in cancer cellsProgrammed cell death pathway in cancer cellsIntrinsic and extrinsic apoptosis pathways in cancer

Drugs targeting this pathway generally: Induce DNA damage or cellular stress to activate intrinsic apoptosis; Mimic pro-apoptotic signals to overcome anti-apoptotic defenses; Inhibit anti-apoptotic proteins such as Bcl-2 or IAPs.